2019 | Horizon Season 2019 Episode 1 – We Need to Talk about Death | Jan-23-2019 | | 0 | 3 weeks |
2018 | Horizon Season 2018 Episode 13 – The Contraceptive Pill: How Safe Is It? | Nov-21-2018 | | 0 | 4 weeks |
| Horizon Season 2018 Episode 12 – Diagnosis on Demand? The Computer Will See You Now | Nov-01-2018 | | 0 | 4 weeks |
| Horizon Season 2018 Episode 11 – Vitamin Pills: Miracle or Myth? | Oct-25-2018 | | 0 | 4 weeks |
| Horizon Season 2018 Episode 10 – Avalanche: Making a Deadly Snowstorm | Oct-18-2018 | | 0 | 4 months |
| Horizon Season 2018 Episode 9 – Body Clock: What Makes Us Tick? | Oct-11-2018 | | 0 | 4 months |
| Horizon Season 2018 Episode 8 – The Placebo Experiment: Can My Brain Cure My Body? | Oct-04-2018 | | 0 | 5 months |
| Horizon Season 2018 Episode 7 – A Week Without Lying – The Honesty Experiment | Aug-29-2018 | | 0 | 5 months |
| Horizon Season 2018 Episode 6 – Stopping Male Suicide | Aug-22-2018 | | 0 | 6 months |
| Horizon Season 2018 Episode 5 – Jupiter Revealed | Aug-07-2018 | | 0 | 6 months |
| Horizon Season 2018 Episode 4 – Spina Bifida & Me | Jul-26-2018 | | 0 | 7 months |
| Horizon Season 2018 Episode 3 – How to Build a Time Machine | Jul-10-2018 | | 0 | 7 months |
| Horizon Season 2018 Episode 2 – Teenagers vs Cancer: A User’s Guide | Jun-26-2018 | | 0 | 7 months |
| Horizon Season 2018 Episode 1 – My Amazing Brain: Richard’s War | Feb-05-2018 | | 0 | 1 year |
2017 | Horizon Season 2017 Episode 15 – Being Transgender | Sep-26-2017 | | 0 | 1 year |
| Horizon Season 2017 Episode 14 – Goodbye Cassini – Hello Saturn | Sep-18-2017 | | 0 | 1 year |
| Horizon Season 2017 Episode 13 – Mars – A Traveller’s Guide | Sep-12-2017 | | 0 | 1 year |
| Horizon Season 2017 Episode 12 – What Makes a Psychopath? | Aug-29-2017 | | 0 | 1 year |
| Horizon Season 2017 Episode 11 – Dippy and the Whale | Jul-13-2017 | | 0 | 1 year |
| Horizon Season 2017 Episode 10 – Dawn of the Driverless Car | Jun-29-2017 | | 0 | 1 year |
| Horizon Season 2017 Episode 9 – 10 Things You Need to Know About the Future | Jun-19-2017 | | 0 | 1 year |
| Horizon Season 2017 Episode 8 – Cyber Attack – The Day the NHS Stopped | Jun-12-2017 | | 0 | 1 year |
| Horizon Season 2017 Episode 7 – Antarctica – Ice Station Rescue | Jun-07-2017 | | 0 | 1 year |
| Horizon Season 2017 Episode 6 – Space Volcanoes | May-23-2017 | | 0 | 1 year |
| Horizon Season 2017 Episode 5 – Strange Signals from Outer Space! | May-16-2017 | | 0 | 1 year |
| Horizon Season 2017 Episode 4 – Why Did I Go Mad? | May-02-2017 | | 0 | 1 year |
| Horizon Season 2017 Episode 3 – ADHD and Me with Rory Bremner | Apr-25-2017 | | 0 | 1 year |
| Horizon Season 2017 Episode 2 – Hair Care Secrets | Jan-23-2017 | | 0 | 2 years |
| Horizon Season 2017 Episode 1 – Clean Eating – The Dirty Truth | Jan-19-2017 | | 0 | 2 years |
2016 | Horizon Season 2016 Episode 18 – Duplicate of Episode 17 | Nov-14-2016 | | 0 | 4 weeks |
| Horizon Season 2016 Episode 17 – The Wildest Weather in the Universe | Oct-23-2016 | | 0 | 2 years |
| Horizon Season 2016 Episode 16 – The Wildest Weather in the Universe | Oct-23-2016 | | 0 | 7 months |
| Horizon Season 2016 Episode 15 – The Lost Tribes of Humanity | Oct-12-2016 | | 0 | 2 years |
| Horizon Season 2016 Episode 14 – My Amazing Twin | Aug-25-2016 | | 0 | 2 years |
| Horizon Season 2016 Episode 13 – Special – Inside Cern | Aug-10-2016 | | 0 | 2 years |
| Horizon Season 2016 Episode 12 – Sports Doping – Winning at Any Cost? | Jul-19-2016 | | 0 | 2 years |
| Horizon Season 2016 Episode 11 – Why Are We Getting So Fat | Jun-07-2016 | | 0 | 2 years |
| Horizon Season 2016 Episode 10 – E-Cigarettes: Miracle or Menace? | May-22-2016 | | 0 | 2 years |
| Horizon Season 2016 Episode 9 – Curing Alzheimer’s | May-11-2016 | | 0 | 2 years |
| Horizon Season 2016 Episode 8 – Ice Station Antarctica | May-04-2016 | | 0 | 2 years |
| Horizon Season 2016 Episode 7 – How to Find Love Online | Apr-25-2016 | | 0 | 2 years |
| Horizon Season 2016 Episode 6 – Closing Time for Zoos | Apr-17-2016 | | 0 | 2 years |
| Horizon Season 2016 Episode 5 – The End of the Solar System | Apr-13-2016 | | 0 | 2 years |
| Horizon Season 2016 Episode 4 – Oceans of the Solar System | Apr-06-2016 | | 0 | 2 years |
| Horizon Season 2016 Episode 3 – The Mystery of Dark Energy | Mar-30-2016 | | 0 | 2 years |
| Horizon Season 2016 Episode 2 – Project Greenglow – The Quest for Gravity Control | Mar-23-2016 | | 0 | 2 years |
| Horizon Season 2016 Episode 1 – The Immortalist | Mar-16-2016 | | 0 | 2 years |
2015 | Horizon Season 2015 Episode 12 – Are Video Games Really That Bad? | Sep-16-2015 | | 0 | 2 years |
| Horizon Season 2015 Episode 11 – Cosmic Dawn: The Real Moment of Creation | Sep-09-2015 | | 0 | 2 years |
| Horizon Season 2015 Episode 10 – Which Universe Are We In? | Sep-02-2015 | | 0 | 2 years |
| Horizon Season 2015 Episode 9 – OCD: A Monster in My Mind | Aug-26-2015 | | 0 | 2 years |
| Horizon Season 2015 Episode 8 – First Britons | Aug-19-2015 | | 0 | 2 years |
| Horizon Season 2015 Episode 7 – Are Health Tests Really a Good Idea? | Aug-12-2015 | | 0 | 2 years |
| Horizon Season 2015 Episode 6 – The Trouble with Space Junk | Aug-05-2015 | | 0 | 2 years |
| Horizon Season 2015 Episode 5 – Is Binge Drinking Really That Bad? | May-20-2015 | | 0 | 2 years |
| Horizon Season 2015 Episode 4 – 70 Million Animal Mummies: Egypt’s Dark Secret | May-11-2015 | | 0 | 2 years |
| Horizon Season 2015 Episode 3 – Dancing in the Dark – The End of Physics? | Mar-17-2015 | | 0 | 2 years |
| Horizon Season 2015 Episode 2 – Aftershock: The Hunt for Gravitational Waves | Mar-10-2015 | | 0 | 2 years |
| Horizon Season 2015 Episode 1 – Secrets of the Solar System | Mar-03-2015 | | 0 | 2 years |
2014 | Horizon Season 2014 Episode 15 – Is Your Brain Male or Female? | Sep-29-2014 | | 0 | 2 years |
| Horizon Season 2014 Episode 14 – Ebola – The Search for a Cure | Sep-10-2014 | | 0 | 2 years |
| Horizon Season 2014 Episode 13 – Inside the Dark Web | Sep-03-2014 | | 0 | 2 years |
| Horizon Season 2014 Episode 12 – Allergies: Modern Life and Me | Aug-27-2014 | | 0 | 2 years |
| Horizon Season 2014 Episode 11 – Should I Eat Meat? – How to Feed the Planet | Aug-20-2014 | | 0 | 2 years |
| Horizon Season 2014 Episode 10 – Should I Eat Meat? – The Big Health Dilemma | Aug-18-2014 | | 0 | 2 years |
| Horizon Season 2014 Episode 9 – What’s Wrong with Our Weather? | Jul-17-2014 | | 0 | 2 years |
| Horizon Season 2014 Episode 8 – Where is Flight MH370? | Jun-17-2014 | | 0 | 2 years |
| Horizon Season 2014 Episode 7 – The £10 Million Challenge | May-22-2014 | | 0 | 2 years |
| Horizon Season 2014 Episode 6 – Living with Autism | Apr-01-2014 | | 0 | 2 years |
| Horizon Season 2014 Episode 5 – How You Really Make Decisions | Feb-24-2014 | | 0 | 2 years |
| Horizon Season 2014 Episode 4 – The Power of the Placebo | Feb-17-2014 | | 0 | 2 years |
| Horizon Season 2014 Episode 3 – Man on Mars – Mission to the Red Planet | Feb-10-2014 | | 0 | 2 years |
| Horizon Season 2014 Episode 2 – Swallowed by a Sink Hole | Feb-03-2014 | | 0 | 2 years |
| Horizon Season 2014 Episode 1 – Sugar vs. Fat | Jan-29-2014 | | 0 | 2 years |
2013 | Horizon Season 2013 Episode 13 – Dinosaurs: The Hunt for Life | Aug-26-2013 | | 0 | 2 years |
| Horizon Season 2013 Episode 12 – Defeating the Hackers | Aug-19-2013 | | 0 | 2 years |
| Horizon Season 2013 Episode 11 – Monitor Me | Aug-12-2013 | | 0 | 2 years |
| Horizon Season 2013 Episode 10 – The Truth About Personality | Jul-10-2013 | | 0 | 2 years |
| Horizon Season 2013 Episode 9 – What Makes us Human? | Jul-03-2013 | | 0 | 2 years |
| Horizon Season 2013 Episode 8 – Swallowed by a Black Hole | Jun-26-2013 | | 0 | 2 years |
| Horizon Season 2013 Episode 7 – Fracking: The New Energy Rush | Jun-19-2013 | | 0 | 2 years |
| Horizon Season 2013 Episode 6 – Little Cat Diaries | Jun-14-2013 | | 0 | 2 years |
| Horizon Season 2013 Episode 5 – The Secret Life of the Cat | Jun-13-2013 | | 0 | 2 years |
| Horizon Season 2013 Episode 4 – The Age of Big Data | Apr-04-2013 | | 0 | 2 years |
| Horizon Season 2013 Episode 3 – The Truth about Taste | Mar-28-2013 | | 0 | 2 years |
| Horizon Season 2013 Episode 2 – How to Avoid Mistakes in Surgery | Mar-21-2013 | | 0 | 2 years |
| Horizon Season 2013 Episode 1 – The Creative Brain: How Insight Works | Mar-14-2013 | | 0 | 2 years |
2012 | Horizon Season 2012 Episode 15 – Defeating the Superbugs | Sep-10-2012 | | 0 | 6 months |
| Horizon Season 2012 Episode 14 – How Small is the Universe? | Sep-03-2012 | | 0 | 6 months |
| Horizon Season 2012 Episode 13 – How Big is the Universe? | Aug-27-2012 | | 0 | 6 months |
| Horizon Season 2012 Episode 12 – Defeating the Superbugs | Sep-10-2012 | | 0 | 2 years |
| Horizon Season 2012 Episode 11 – How Small is the Universe? | Sep-03-2012 | | 0 | 2 years |
| Horizon Season 2012 Episode 10 – How Big Is the Universe? | Aug-27-2012 | | 0 | 2 years |
| Horizon Season 2012 Episode 9 – Eat, Fast and Live Longer | Aug-06-2012 | | 0 | 2 years |
| Horizon Season 2012 Episode 8 – The Truth About Looking Younger | Jul-23-2012 | | 0 | 2 years |
| Horizon Season 2012 Episode 7 – Defeating Cancer | Apr-10-2012 | | 0 | 2 years |
| Horizon Season 2012 Episode 6 – Global Weirding | Mar-27-2012 | | 0 | 2 years |
| Horizon Season 2012 Episode 5 – The Truth about Fat | Mar-20-2012 | | 0 | 2 years |
| Horizon Season 2012 Episode 4 – Out of Control? | Mar-13-2012 | | 0 | 2 years |
| Horizon Season 2012 Episode 3 – Solar Storms: The Threat to Planet Earth | Mar-06-2012 | | 0 | 2 years |
| Horizon Season 2012 Episode 2 – The Truth About Exercise | Feb-28-2012 | | 0 | 2 years |
| Horizon Season 2012 Episode 1 – Playing God | Jan-17-2012 | | 0 | 2 years |
2011 | Horizon Season 2011 Episode 14 – Fukushima: Is Nuclear Power Safe? | Sep-14-2011 | | 0 | 2 years |
| Horizon Season 2011 Episode 13 – Are You Good or Evil? | Sep-07-2011 | | 0 | 2 years |
| Horizon Season 2011 Episode 12 – The Core | Aug-31-2011 | | 0 | 2 years |
| Horizon Season 2011 Episode 11 – The Nine Months That Made You | Aug-22-2011 | | 0 | 2 years |
| Horizon Season 2011 Episode 10 – Seeing Stars | Aug-15-2011 | | 0 | 2 years |
| Horizon Season 2011 Episode 9 – Do You See What I See | Aug-08-2011 | | 0 | 2 years |
| Horizon Season 2011 Episode 8 – Predators in Your Backyard | Mar-08-2011 | | 0 | 2 years |
| Horizon Season 2011 Episode 7 – Are We Still Evolving? | Mar-01-2011 | | 0 | 2 years |
| Horizon Season 2011 Episode 6 – How to Mend a Broken Heart | Feb-14-2011 | | 0 | 2 years |
| Horizon Season 2011 Episode 5 – Surviving a Car Crash | Feb-07-2011 | | 0 | 2 years |
| Horizon Season 2011 Episode 4 – The Secret World of Pain | Jan-31-2011 | | 0 | 2 years |
| Horizon Season 2011 Episode 3 – Science Under Attack | Jan-24-2011 | | 0 | 2 years |
| Horizon Season 2011 Episode 2 – What is Reality? | Jan-17-2011 | | 0 | 2 years |
| Horizon Season 2011 Episode 1 – What is One Degree? | Jan-10-2011 | | 0 | 2 years |
2010 | Horizon Season 2010 Episode 15 – Deepwater Disaster – The Untold Story | Nov-16-2010 | | 0 | 2 years |
| Horizon Season 2010 Episode 14 – Asteroids – The Good, the Bad and the Ugly | Nov-03-2010 | | 0 | 2 years |
| Horizon Season 2010 Episode 13 – Miracle Cure? A Decade of the Human Genome | Oct-25-2010 | | 0 | 2 years |
| Horizon Season 2010 Episode 12 – Is Seeing Believing? | Oct-18-2010 | | 0 | 2 years |
| Horizon Season 2010 Episode 11 – What Happened Before the Big Bang? | Oct-11-2010 | | 0 | 2 years |
| Horizon Season 2010 Episode 10 – The Death of the Oceans | Oct-04-2010 | | 0 | 2 years |
| Horizon Season 2010 Episode 9 – Back from the Dead | Sep-27-2010 | | 0 | 2 years |
| Horizon Season 2010 Episode 8 – Is Everything We Know About the Universe Wrong? | Mar-09-2010 | | 0 | 2 years |
| Horizon Season 2010 Episode 7 – Did Cooking Make Us Human? | Mar-02-2010 | | 0 | 2 years |
| Horizon Season 2010 Episode 6 – What Makes a Genius? | Feb-17-2010 | | 0 | 2 years |
| Horizon Season 2010 Episode 5 – To Infinity and Beyond | Feb-10-2010 | | 0 | 2 years |
| Horizon Season 2010 Episode 4 – Don’t Grow Old | Feb-03-2010 | | 0 | 2 years |
| Horizon Season 2010 Episode 3 – Pill Poppers | Jan-20-2010 | | 0 | 2 years |
| Horizon Season 2010 Episode 2 – Why Do Viruses Kill? | Jan-13-2010 | | 0 | 2 years |
| Horizon Season 2010 Episode 1 – The Secret Life of the Dog | Jan-06-2010 | | 0 | 2 years |
2009 | Horizon Season 2009 Episode 18 – How Many People Can Live on Planet Earth? | Dec-09-2009 | | 0 | 6 months |
| Horizon Season 2009 Episode 17 – How Long is a Piece of String? | Nov-17-2009 | | 0 | 2 years |
| Horizon Season 2009 Episode 16 – Why Do We Talk? | Nov-10-2009 | | 0 | 2 years |
| Horizon Season 2009 Episode 15 – Who’s Afraid of a Big Black Hole? | Nov-03-2009 | | 0 | 2 years |
| Horizon Season 2009 Episode 14 – Fix Me | Oct-27-2009 | | 0 | 2 years |
| Horizon Season 2009 Episode 13 – The Secret You | Oct-20-2009 | | 0 | 2 years |
| Horizon Season 2009 Episode 12 – Do I Drink Too Much? | Oct-13-2009 | | 0 | 2 years |
| Horizon Season 2009 Episode 11 – How Violent Are You? | May-12-2009 | | 0 | 2 years |
| Horizon Season 2009 Episode 10 – Alan and Marcus Go Forth and Multiply | Mar-31-2009 | | 0 | 2 years |
| Horizon Season 2009 Episode 9 – Why Can’t We Predict Earthquakes? | Mar-24-2009 | | 0 | 2 years |
| Horizon Season 2009 Episode 8 – Who Do You Want Your Child to Be? | Mar-17-2009 | | 0 | 2 years |
| Horizon Season 2009 Episode 7 – How to Survive a Disaster | Mar-10-2009 | | 0 | 2 years |
| Horizon Season 2009 Episode 6 – What’s the Problem with Nudity? | Mar-03-2009 | | 0 | 2 years |
| Horizon Season 2009 Episode 5 – The Secret Life of Your Bodyclock | Feb-24-2009 | | 0 | 2 years |
| Horizon Season 2009 Episode 4 – Can We Make a Star on Earth? | Feb-17-2009 | | 0 | 2 years |
| Horizon Season 2009 Episode 3 – Why Do We Dream? | Feb-10-2009 | | 0 | 2 years |
| Horizon Season 2009 Episode 2 – Cannabis: The Evil Weed? | Feb-03-2009 | | 0 | 2 years |
| Horizon Season 2009 Episode 1 – Why Are Thin People Not Fat? | Jan-26-2009 | | 0 | 2 years |
2008 | Horizon Season 2008 Episode 17 – Where’s My Robot? | Dec-16-2008 | | 0 | 2 years |
| Horizon Season 2008 Episode 16 – Allergy Planet | Dec-09-2008 | | 0 | 2 years |
| Horizon Season 2008 Episode 15 – Do You Know What Time It Is? | Dec-02-2008 | | 0 | 2 years |
| Horizon Season 2008 Episode 14 – Jimmy’s GM Food Fight | Nov-25-2008 | | 0 | 2 years |
| Horizon Season 2008 Episode 13 – How Mad Are You? (2 of 2) | Nov-18-2008 | | 0 | 2 years |
| Horizon Season 2008 Episode 12 – How Mad Are You? (1 of 2) | Nov-11-2008 | | 0 | 2 years |
| Horizon Season 2008 Episode 11 – The President’s Guide to Science | Sep-16-2008 | | 0 | 2 years |
| Horizon Season 2008 Episode 10 – How Does Your Memory Work? | Mar-25-2008 | | 0 | 2 years |
| Horizon Season 2008 Episode 9 – How Much is Your Dead Body Worth? | Mar-18-2008 | | 0 | 2 years |
| Horizon Season 2008 Episode 8 – Are we Alone in the Universe? | Mar-04-2008 | | 0 | 2 years |
| Horizon Season 2008 Episode 7 – Prof. Regan’s Supermarket Secrets | Feb-26-2008 | | 0 | 2 years |
| Horizon Season 2008 Episode 6 – How to Live to be 101 | Feb-19-2008 | | 0 | 2 years |
| Horizon Season 2008 Episode 5 – How to Make Better Decisions | Feb-12-2008 | | 0 | 2 years |
| Horizon Season 2008 Episode 4 – Is Alcohol Worse than Ecstasy? | Feb-05-2008 | | 0 | 2 years |
| Horizon Season 2008 Episode 3 – What on Earth is Wrong With Gravity? | Jan-29-2008 | | 0 | 2 years |
| Horizon Season 2008 Episode 2 – Total Isolation | Jan-22-2008 | | 0 | 2 years |
| Horizon Season 2008 Episode 1 – How to Kill a Human Being | Jan-15-2008 | | 0 | 2 years |
2007 | Horizon Season 2007 Episode 9 – How to Commit the Perfect Murder | May-08-2007 | | 0 | 2 years |
| Horizon Season 2007 Episode 8 – The Six Billion Dollar Experiment | May-01-2007 | | 0 | 2 years |
| Horizon Season 2007 Episode 7 – Skyscraper Fire Fighters | Apr-24-2007 | | 0 | 2 years |
| Horizon Season 2007 Episode 6 – Battle of the Brains | Apr-17-2007 | | 0 | 2 years |
| Horizon Season 2007 Episode 5 – Moon for Sale | Apr-10-2007 | | 0 | 2 years |
| Horizon Season 2007 Episode 4 – Mad but Glad | Apr-03-2007 | | 0 | 2 years |
| Horizon Season 2007 Episode 3 – Prof Regan’s Beauty Parlour | Mar-27-2007 | | 0 | 2 years |
| Horizon Season 2007 Episode 2 – The Elephant’s Guide to Sex | Mar-20-2007 | | 0 | 2 years |
| Horizon Season 2007 Episode 1 – My Pet Dinosaur | Mar-13-2007 | | 0 | 2 years |
2006 | Horizon Season 2006 Episode 20 – We are the Aliens | Nov-14-2006 | | 0 | 2 years |
| Horizon Season 2006 Episode 19 – Pandemic | Nov-07-2006 | | 0 | 2 years |
| Horizon Season 2006 Episode 18 – The Great Robot Race | Oct-31-2006 | | 0 | 2 years |
| Horizon Season 2006 Episode 17 – Human v2.0 | Oct-24-2006 | | 0 | 2 years |
| Horizon Season 2006 Episode 16 – The Worlds First Face Transplant | Oct-17-2006 | | 0 | 2 years |
| Horizon Season 2006 Episode 15 – Chimps are People Too | Oct-10-2006 | | 0 | 2 years |
| Horizon Season 2006 Episode 14 – Survivors Guide to Plane Crashes | Oct-03-2006 | | 0 | 2 years |
| Horizon Season 2006 Episode 13 – Tutankhamun’s Fireball | Jul-20-2006 | | 0 | 2 years |
| Horizon Season 2006 Episode 12 – Nuclear Nightmares | Jul-13-2006 | | 0 | 2 years |
| Horizon Season 2006 Episode 11 – We Love Cigarettes | Jun-29-2006 | | 0 | 2 years |
| Horizon Season 2006 Episode 10 – Bye Bye Planet Pluto | Jun-22-2006 | | 0 | 2 years |
| Horizon Season 2006 Episode 9 – The Genius Sperm Bank | Jun-15-2006 | | 0 | 2 years |
| Horizon Season 2006 Episode 8 – The Woman Who Thinks Like a Cow | Jun-08-2006 | | 0 | 2 years |
| Horizon Season 2006 Episode 7 – Winning Gold in 2012 | Mar-18-2006 | | 0 | 2 years |
| Horizon Season 2006 Episode 6 – Most of Our Universe Is Missing | Feb-09-2006 | | 0 | 2 years |
| Horizon Season 2006 Episode 5 – The Lost City of New Orleans | Feb-02-2006 | | 0 | 2 years |
| Horizon Season 2006 Episode 4 – A War on Science | Jan-26-2006 | | 0 | 2 years |
| Horizon Season 2006 Episode 3 – Waiting for a Heartbeat | Jan-19-2006 | | 0 | 2 years |
| Horizon Season 2006 Episode 2 – Space Tourists | Jan-12-2006 | | 0 | 2 years |
| Horizon Season 2006 Episode 1 – The Life and Times of El Niño | Jan-03-2006 | | 0 | 2 years |
2005 | Horizon Season 2005 Episode 20 – The Ghost in Your Genes | Dec-15-2005 | | 0 | 2 years |
| Horizon Season 2005 Episode 19 – The 7/7 Bombers: A Psychological Investigation | Dec-08-2005 | | 0 | 2 years |
| Horizon Season 2005 Episode 18 – Titan. A Place Like Home? | Nov-10-2005 | | 0 | 2 years |
| Horizon Season 2005 Episode 17 – Madagascar – A Treetop Odyssey | Oct-13-2005 | | 0 | 2 years |
| Horizon Season 2005 Episode 16 – Can Fish Make My Child Smart? | Oct-06-2005 | | 0 | 2 years |
| Horizon Season 2005 Episode 15 – The Doctor Who Makes People Walk Again? | Oct-06-2005 | | 0 | 2 years |
| Horizon Season 2005 Episode 14 – The Mystery of the Human Hobbit | Sep-15-2005 | | 0 | 2 years |
| Horizon Season 2005 Episode 13 – The Hawking Paradox | Sep-08-2005 | | 0 | 2 years |
| Horizon Season 2005 Episode 12 – Tsunami: Naming the Dead | Sep-01-2005 | | 0 | 2 years |
| Horizon Season 2005 Episode 11 – Malaria: Defeating the Curse | Jun-05-2005 | | 0 | 2 years |
| Horizon Season 2005 Episode 10 – Does the MMR Jab Cause Autism? | May-29-2005 | | 0 | 2 years |
| Horizon Season 2005 Episode 9 – The Next Megaquake | May-22-2005 | | 0 | 2 years |
| Horizon Season 2005 Episode 8 – The Lost Civilisation of Peru | Mar-03-2005 | | 0 | 2 years |
| Horizon Season 2005 Episode 7 – Who’s Afraid of Designer Babies? | Feb-24-2005 | | 0 | 2 years |
| Horizon Season 2005 Episode 6 – An Experiment to Save the World | Feb-17-2005 | | 0 | 2 years |
| Horizon Season 2005 Episode 5 – Neanderthal | Feb-10-2005 | | 0 | 2 years |
| Horizon Season 2005 Episode 4 – Living with ADHD | Mar-03-2005 | | 0 | 2 years |
| Horizon Season 2005 Episode 3 – Einstein’s Equation of Life and Death | Jan-27-2005 | | 0 | 2 years |
| Horizon Season 2005 Episode 2 – Einstein’s Unfinished Symphony | Jan-20-2005 | | 0 | 2 years |
| Horizon Season 2005 Episode 1 – Global Dimming | Jan-13-2005 | | 0 | 2 years |
2004 | Horizon Season 2004 Episode 18 – Dr Money and the Boy with No Penis | Nov-04-2004 | | 0 | 2 years |
| Horizon Season 2004 Episode 17 – The Hunt for the Supertwister | Oct-28-2004 | | 0 | 2 years |
| Horizon Season 2004 Episode 16 – Saturn – Lord of the Rings | Oct-21-2004 | | 0 | 2 years |
| Horizon Season 2004 Episode 15 – Making Millions the Easy Way | Oct-14-2004 | | 0 | 2 years |
| Horizon Season 2004 Episode 14 – What Really Killed the Dinosaurs? | Oct-07-2004 | | 0 | 2 years |
| Horizon Season 2004 Episode 13 – Derek Tastes of Earwax | Sep-30-2004 | | 0 | 2 years |
| Horizon Season 2004 Episode 12 – King Solomon’s Tablet of Stone | Sep-23-2004 | | 0 | 2 years |
| Horizon Season 2004 Episode 11 – The Truth About Vitamins | Sep-16-2004 | | 0 | 2 years |
| Horizon Season 2004 Episode 10 – The Truth of Troy | Mar-25-2004 | | 0 | 2 years |
| Horizon Season 2004 Episode 9 – Project Poltergeist | Mar-18-2004 | | 0 | 2 years |
| Horizon Season 2004 Episode 8 – T-Rex – Warrior or Wimp? | Mar-11-2004 | | 0 | 2 years |
| Horizon Season 2004 Episode 7 – Diamond Labs | Mar-04-2004 | | 0 | 2 years |
| Horizon Season 2004 Episode 6 – Thalidomide – A Second Chance? | Feb-12-2004 | | 0 | 2 years |
| Horizon Season 2004 Episode 5 – The Dark Secret of Hendrik Schön | Feb-05-2004 | | 0 | 2 years |
| Horizon Season 2004 Episode 4 – Secrets of the Star Disc | Jan-29-2004 | | 0 | 2 years |
| Horizon Season 2004 Episode 3 – The Atkins Diet | Jan-22-2004 | | 0 | 2 years |
| Horizon Season 2004 Episode 2 – The Moscow Theatre Siege | Jan-15-2004 | | 0 | 2 years |
| Horizon Season 2004 Episode 1 – The Demonic Ape | Jan-08-2004 | | 0 | 2 years |
2003 | Horizon Season 2003 Episode 19 – Time Trip | Dec-18-2003 | | 0 | 2 years |
| Horizon Season 2003 Episode 18 – Percy Pilcher’s Flying Machine | Dec-11-2003 | | 0 | 2 years |
| Horizon Season 2003 Episode 17 – The Hunt for an AIDS Vaccine | Dec-04-2003 | | 0 | 2 years |
| Horizon Season 2003 Episode 16 – Last Flight of the Columbia | Nov-27-2003 | | 0 | 2 years |
| Horizon Season 2003 Episode 15 – The Bible Code | Nov-20-2003 | | 0 | 2 years |
| Horizon Season 2003 Episode 14 – The Big Chill | Nov-13-2003 | | 0 | 2 years |
| Horizon Season 2003 Episode 13 – SARS: The True Story | May-29-2003 | | 0 | 2 years |
| Horizon Season 2003 Episode 12 – Flight 587 | May-08-2003 | | 0 | 2 years |
| Horizon Season 2003 Episode 11 – God On The Brain | Apr-17-2003 | | 0 | 2 years |
| Horizon Season 2003 Episode 10 – The Secret Life Of Caves | Apr-03-2003 | | 0 | 2 years |
| Horizon Season 2003 Episode 9 – Life On Mars (Update) | Mar-27-2003 | | 0 | 2 years |
| Horizon Season 2003 Episode 8 – Earthquake Storms | Mar-06-2003 | | 0 | 2 years |
| Horizon Season 2003 Episode 7 – Trial and Error | Feb-27-2003 | | 0 | 2 years |
| Horizon Season 2003 Episode 6 – The Day We Learned To Think | Feb-20-2003 | | 0 | 2 years |
| Horizon Season 2003 Episode 5 – Sexual Chemistry (Update) | Feb-13-2003 | | 0 | 2 years |
| Horizon Season 2003 Episode 4 – Dirty Bomb | Jan-30-2003 | | 0 | 2 years |
| Horizon Season 2003 Episode 3 – Averting Armageddon | Jan-23-2003 | | 0 | 2 years |
| Horizon Season 2003 Episode 2 – Living Nightmare | Jan-16-2003 | | 0 | 2 years |
| Horizon Season 2003 Episode 1 – The Mystery Of Easter Island | Jan-09-2003 | | 0 | 2 years |
2002 | Horizon Season 2002 Episode 18 – The Secret of El Dorado | Dec-19-2002 | | 0 | 2 years |
| Horizon Season 2002 Episode 17 – The Day the Earth Nearly Died | Dec-05-2002 | | 0 | 2 years |
| Horizon Season 2002 Episode 16 – Homeopathy: The Test | Nov-26-2002 | | 0 | 2 years |
| Horizon Season 2002 Episode 15 – Stone Age Columbus | Nov-21-2002 | | 0 | 2 years |
| Horizon Season 2002 Episode 14 – Freak Wave | Nov-14-2002 | | 0 | 2 years |
| Horizon Season 2002 Episode 13 – The England Patient | May-23-2002 | | 0 | 2 years |
| Horizon Season 2002 Episode 12 – The A6 Murder | May-16-2002 | | 0 | 2 years |
| Horizon Season 2002 Episode 11 – Killer Lakes | Apr-04-2002 | | 0 | 2 years |
| Horizon Season 2002 Episode 10 – The Mystery of the Jurassic | Mar-28-2002 | | 0 | 2 years |
| Horizon Season 2002 Episode 9 – Archimedes’ Secret | Mar-14-2002 | | 0 | 2 years |
| Horizon Season 2002 Episode 8 – The Fall of the World Trade Center | Mar-07-2002 | | 0 | 2 years |
| Horizon Season 2002 Episode 7 – The Dinosaur that Fooled the World | Feb-21-2002 | | 0 | 2 years |
| Horizon Season 2002 Episode 6 – Parallel Universes | Feb-14-2002 | | 0 | 2 years |
| Horizon Season 2002 Episode 5 – Death of the Iceman | Feb-07-2002 | | 0 | 2 years |
| Horizon Season 2002 Episode 4 – The Lost Pyramids of Caral | Jan-31-2002 | | 0 | 2 years |
| Horizon Season 2002 Episode 3 – Fatbusters | Jan-24-2002 | | 0 | 2 years |
| Horizon Season 2002 Episode 2 – Volcano Hell | Jan-17-2002 | | 0 | 2 years |
| Horizon Season 2002 Episode 1 – Helike – The Real Atlantis | Jan-10-2002 | | 0 | 2 years |
2001 | Horizon Season 2001 Episode 11 – Cloning the First Human | Oct-25-2001 | | 0 | 2 years |
| Horizon Season 2001 Episode 10 – The Death Star | Oct-18-2001 | | 0 | 2 years |
| Horizon Season 2001 Episode 9 – Life Blood | Oct-11-2001 | | 0 | 2 years |
| Horizon Season 2001 Episode 8 – The Ape that Took Over the World | Oct-04-2001 | | 0 | 2 years |
| Horizon Season 2001 Episode 7 – The Mystery of the Persian Mummy | Sep-20-2001 | | 0 | 2 years |
| Horizon Season 2001 Episode 6 – Taming the Problem Child | Mar-06-2001 | | 0 | 2 years |
| Horizon Season 2001 Episode 5 – Snowball Earth | Feb-22-2001 | | 0 | 2 years |
| Horizon Season 2001 Episode 4 – Ecstasy and Agony | Feb-15-2001 | | 0 | 2 years |
| Horizon Season 2001 Episode 3 – Killer Algae | Feb-08-2001 | | 0 | 2 years |
| Horizon Season 2001 Episode 2 – The Missing Link | Feb-01-2001 | | 0 | 2 years |
| Horizon Season 2001 Episode 1 – The Mystery of the Miami Circle | Jan-25-2001 | | 0 | 2 years |
2000 | Horizon Season 2000 Episode 20 – Atlantis Reborn Again | Dec-14-2000 | | 0 | 2 years |
| Horizon Season 2000 Episode 19 – The Boy who was Turned into a Girl | Dec-07-2000 | | 0 | 2 years |
| Horizon Season 2000 Episode 18 – Supermassive Black Holes | Nov-30-2000 | | 0 | 2 years |
| Horizon Season 2000 Episode 17 – Extreme Dinosaurs | Nov-23-2000 | | 0 | 2 years |
| Horizon Season 2000 Episode 16 – Valley of Life or Death | Nov-16-2000 | | 0 | 2 years |
| Horizon Season 2000 Episode 15 – The Secret Treasures of Zeugma | Nov-09-2000 | | 0 | 2 years |
| Horizon Season 2000 Episode 14 – Vanished: The Plane that Disappeared | Nov-02-2000 | | 0 | 2 years |
| Horizon Season 2000 Episode 13 – The Lost World of Lake Vostok | Oct-26-2000 | | 0 | 2 years |
| Horizon Season 2000 Episode 12 – Conjoined Twins | Oct-19-2000 | | 0 | 2 years |
| Horizon Season 2000 Episode 11 – Mega-Tsunami: Wave of Destruction | Oct-12-2000 | | 0 | 2 years |
| Horizon Season 2000 Episode 10 – Moon Children | Apr-04-2000 | | 0 | 2 years |
| Horizon Season 2000 Episode 9 – Constant Craving: The Science of Addiction | Mar-30-2000 | | 0 | 2 years |
| Horizon Season 2000 Episode 8 – Planet Hunters | Mar-16-2000 | | 0 | 2 years |
| Horizon Season 2000 Episode 7 – Is GM Safe? | Mar-09-2000 | | 0 | 2 years |
| Horizon Season 2000 Episode 6 – Complete Obsession – Body Dysmorphia | Feb-17-2000 | | 0 | 2 years |
| Horizon Season 2000 Episode 5 – Miracle In Orbit | Feb-10-2000 | | 0 | 2 years |
| Horizon Season 2000 Episode 4 – Supervolcanoes | Feb-03-2000 | | 0 | 2 years |
| Horizon Season 2000 Episode 3 – The Diamond Makers | Jan-27-2000 | | 0 | 2 years |
| Horizon Season 2000 Episode 2 – The Lost City of Nasca | Jan-20-2000 | | 0 | 2 years |
| Horizon Season 2000 Episode 1 – Breath of Life | Jan-12-2000 | | 0 | 2 years |
1999 | Horizon Season 1999 Episode 13 – The Midas Formula | Dec-02-1999 | | 0 | 2 years |
| Horizon Season 1999 Episode 12 – Anatomy of an Avalanche | Nov-25-1999 | | 0 | 2 years |
| Horizon Season 1999 Episode 11 – Volcanoes of the Deep | Nov-18-1999 | | 0 | 2 years |
| Horizon Season 1999 Episode 10 – Mistaken Identity | Nov-11-1999 | | 0 | 2 years |
| Horizon Season 1999 Episode 9 – Wings of Angels | Aug-01-1999 | | 0 | 2 years |
| Horizon Season 1999 Episode 8 – Skeleton Key | Mar-25-1999 | | 0 | 2 years |
| Horizon Season 1999 Episode 7 – New Asteroid Danger | Mar-18-1999 | | 0 | 2 years |
| Horizon Season 1999 Episode 6 – New Star in Orbit | Mar-11-1999 | | 0 | 2 years |
| Horizon Season 1999 Episode 5 – Sudden Death | Feb-25-1999 | | 0 | 2 years |
| Horizon Season 1999 Episode 4 – Electric Heart | Feb-18-1999 | | 0 | 2 years |
| Horizon Season 1999 Episode 3 – Elephants or Ivory | Feb-11-1999 | | 0 | 2 years |
| Horizon Season 1999 Episode 2 – Pandemic | Feb-04-1999 | | 0 | 2 years |
| Horizon Season 1999 Episode 1 – From Here to Infinity | Jan-28-1999 | | 0 | 2 years |
1998 | Horizon Season 1998 Episode 18 – Beyond a Joke | Nov-05-1998 | | 0 | 2 years |
| Horizon Season 1998 Episode 17 – Thalidomide: A Necessary Evil | Oct-29-1998 | | 0 | 2 years |
| Horizon Season 1998 Episode 16 – The Life and Times of Life and Time | Oct-22-1998 | | 0 | 2 years |
| Horizon Season 1998 Episode 15 – Mosquito! | Oct-15-1998 | | 0 | 2 years |
| Horizon Season 1998 Episode 14 – Dinosaurs in Your Garden | Oct-08-1998 | | 0 | 2 years |
| Horizon Season 1998 Episode 13 – Chimps on Death Row | Oct-01-1998 | | 0 | 2 years |
| Horizon Season 1998 Episode 12 – Sexual Chemistry | Sep-10-1998 | | 0 | 2 years |
| Horizon Season 1998 Episode 11 – The Gulf War Jigsaw | May-14-1998 | | 0 | 2 years |
| Horizon Season 1998 Episode 10 – Magic Bullet | May-07-1998 | | 0 | 2 years |
| Horizon Season 1998 Episode 9 – The Computer that Ate Hollywood | Apr-30-1998 | | 0 | 2 years |
| Horizon Season 1998 Episode 8 – Mir Mortals | Apr-23-1998 | | 0 | 2 years |
| Horizon Season 1998 Episode 7 – The Curse of Vesuvius | Apr-16-1998 | | 0 | 2 years |
| Horizon Season 1998 Episode 6 – Overkill | Apr-02-1998 | | 0 | 2 years |
| Horizon Season 1998 Episode 5 – The Limits to Birth | Mar-26-1998 | | 0 | 2 years |
| Horizon Season 1998 Episode 4 – Hopeful Monsters | Mar-19-1998 | | 0 | 2 years |
| Horizon Season 1998 Episode 3 – The Rainmaker | Mar-05-1998 | | 0 | 2 years |
| Horizon Season 1998 Episode 2 – Dr Miller and the Islanders | Feb-26-1998 | | 0 | 2 years |
| Horizon Season 1998 Episode 1 – Saddam’s Secrets | Feb-19-1998 | | 0 | 2 years |
1997 | Horizon Season 1997 Episode 15 – Dawn of the Clone Age | Oct-23-1997 | | 0 | 2 years |
| Horizon Season 1997 Episode 14 – The Man Who Lost his Body | Oct-16-1997 | | 0 | 2 years |
| Horizon Season 1997 Episode 13 – The Virus that Cures | Oct-09-1997 | | 0 | 2 years |
| Horizon Season 1997 Episode 12 – Out of Asia | Sep-25-1997 | | 0 | 2 years |
| Horizon Season 1997 Episode 11 – Mind Over Body | Sep-18-1997 | | 0 | 2 years |
| Horizon Season 1997 Episode 10 – Crater of Death | Sep-11-1997 | | 0 | 2 years |
| Horizon Season 1997 Episode 9 – The Great Balloon Race | May-01-1997 | | 0 | 2 years |
| Horizon Season 1997 Episode 8 – A Perfect Oil Spill | Apr-24-1997 | | 0 | 2 years |
| Horizon Season 1997 Episode 7 – Turned On by Danger | Apr-17-1997 | | 0 | 2 years |
| Horizon Season 1997 Episode 6 – Silent Children, New Language | Apr-03-1997 | | 0 | 2 years |
| Horizon Season 1997 Episode 5 – Smallpox on Death Row | Mar-27-1997 | | 0 | 2 years |
| Horizon Season 1997 Episode 4 – Genius of the Jet | Mar-20-1997 | | 0 | 2 years |
| Horizon Season 1997 Episode 3 – Shipwreck | Mar-13-1997 | | 0 | 2 years |
| Horizon Season 1997 Episode 2 – Fat Cats, Thin Mice | Mar-06-1997 | | 0 | 2 years |
| Horizon Season 1997 Episode 1 – Psychedelic Science | Feb-27-1997 | | 0 | 2 years |
1996 | Horizon Season 1996 Episode 16 – Noah’s Flood | Dec-16-1996 | | 0 | 2 years |
| Horizon Season 1996 Episode 15 – The Time Lords | Dec-02-1996 | | 0 | 2 years |
| Horizon Season 1996 Episode 14 – Living Death | Nov-25-1996 | | 0 | 2 years |
| Horizon Season 1996 Episode 13 – Aliens from Mars | Nov-11-1996 | | 0 | 2 years |
| Horizon Season 1996 Episode 12 – TV is Dead, Long Live TV | Nov-04-1996 | | 0 | 2 years |
| Horizon Season 1996 Episode 11 – Fallout from Chernobyl | Apr-01-1996 | | 0 | 2 years |
| Horizon Season 1996 Episode 10 – Inside Chernobyl’s Sarcophagus (Update) | Mar-25-1996 | | 0 | 2 years |
| Horizon Season 1996 Episode 9 – The Planet Hunters | Mar-11-1996 | | 0 | 2 years |
| Horizon Season 1996 Episode 8 – Death by Design | Mar-04-1996 | | 0 | 2 years |
| Horizon Season 1996 Episode 7 – Assault on the Male (revisited) | Feb-26-1996 | | 0 | 2 years |
| Horizon Season 1996 Episode 6 – Masters of the Ionosphere | Feb-12-1996 | | 0 | 2 years |
| Horizon Season 1996 Episode 5 – The Gene Race | Feb-05-1996 | | 0 | 2 years |
| Horizon Season 1996 Episode 4 – Nature’s Numbers | Jan-29-1996 | | 0 | 2 years |
| Horizon Season 1996 Episode 3 – A Miracle for Cancer ? | Jan-22-1996 | | 0 | 2 years |
| Horizon Season 1996 Episode 2 – Fermat’s Last Theorem | Jan-15-1996 | | 0 | 2 years |
| Horizon Season 1996 Episode 1 – The Butchers of Boxgrove | Jan-08-1996 | | 0 | 2 years |
1995 | Horizon Season 1995 Episode 20 – The Runaway Mountain | Dec-11-1995 | | 0 | 2 years |
| Horizon Season 1995 Episode 19 – AIDS: Behind Closed Doors | Dec-04-1995 | | 0 | 2 years |
| Horizon Season 1995 Episode 18 – A Code In The Nose | Nov-27-1995 | | 0 | 2 years |
| Horizon Season 1995 Episode 17 – Hunt for the Doomsday Asteroid (Update) | Nov-20-1995 | | 0 | 2 years |
| Horizon Season 1995 Episode 16 – Nanotopia | Nov-13-1995 | | 0 | 2 years |
| Horizon Season 1995 Episode 15 – The Human Laboratory | Nov-06-1995 | | 0 | 2 years |
| Horizon Season 1995 Episode 14 – Liar | Oct-30-1995 | | 0 | 2 years |
| Horizon Season 1995 Episode 13 – Hearing Voices | Apr-24-1995 | | 0 | 2 years |
| Horizon Season 1995 Episode 12 – Cracks in the Crust | Apr-10-1995 | | 0 | 2 years |
| Horizon Season 1995 Episode 11 – Foetal Attraction | Apr-03-1995 | | 0 | 2 years |
| Horizon Season 1995 Episode 10 – The I-Bomb | Mar-27-1995 | | 0 | 2 years |
| Horizon Season 1995 Episode 9 – Icon Earth | Mar-20-1995 | | 0 | 2 years |
| Horizon Season 1995 Episode 8 – The Betrayers | Mar-13-1995 | | 0 | 2 years |
| Horizon Season 1995 Episode 7 – Exodus | Mar-06-1995 | | 0 | 2 years |
| Horizon Season 1995 Episode 6 – Farewell Fantastic Venus | Feb-27-1995 | | 0 | 2 years |
| Horizon Season 1995 Episode 5 – Too Big Too Soon? | Feb-20-1992 | | 0 | 2 years |
| Horizon Season 1995 Episode 4 – Siamese Twins | Jan-30-1995 | | 0 | 2 years |
| Horizon Season 1995 Episode 3 – Bones of Contention | Jan-23-1995 | | 0 | 2 years |
| Horizon Season 1995 Episode 2 – Russia’s Deep Secrets | Jan-16-1995 | | 0 | 2 years |
| Horizon Season 1995 Episode 1 – Tibet – The Ice Mother | Jan-09-1995 | | 0 | 2 years |
1994 | Horizon Season 1994 Episode 21 – Designer Wines | Dec-19-1994 | | 0 | 2 years |
| Horizon Season 1994 Episode 20 – Orange Sherbet Kisses | Dec-12-1994 | | 0 | 2 years |
| Horizon Season 1994 Episode 19 – Close Encounters | Nov-28-1994 | | 0 | 2 years |
| Horizon Season 1994 Episode 18 – The Predator | Nov-21-1994 | | 0 | 2 years |
| Horizon Season 1994 Episode 17 – Whispers of Creation | Nov-14-1994 | | 0 | 2 years |
| Horizon Season 1994 Episode 16 – Deaf Whale, Dead Whale | Nov-07-1994 | | 0 | 2 years |
| Horizon Season 1994 Episode 15 – Ulcer Wars | May-16-1994 | | 0 | 2 years |
| Horizon Season 1994 Episode 14 – The Blueprints of Genocide | May-09-1994 | | 0 | 2 years |
| Horizon Season 1994 Episode 13 – Against The Clock | Apr-25-1994 | | 0 | 2 years |
| Horizon Season 1994 Episode 12 – After the Flood | Apr-18-1994 | | 0 | 2 years |
| Horizon Season 1994 Episode 11 – Sir Walter’s Journey | Mar-28-1994 | | 0 | 2 years |
| Horizon Season 1994 Episode 10 – Too Close to the Sun | Mar-21-1994 | | 0 | 2 years |
| Horizon Season 1994 Episode 9 – Some Like iit Hot | Mar-14-1994 | | 0 | 2 years |
| Horizon Season 1994 Episode 8 – Hubble Vision | Mar-07-1994 | | 0 | 2 years |
| Horizon Season 1994 Episode 7 – Hunt for the Doomsday Asteroid | Feb-28-1994 | | 0 | 2 years |
| Horizon Season 1994 Episode 6 – Air Crash – The Deadly Puzzle | Feb-14-1994 | | 0 | 2 years |
| Horizon Season 1994 Episode 5 – Death Wish – The Untold Story | Feb-07-1994 | | 0 | 2 years |
| Horizon Season 1994 Episode 4 – Genie | Jan-31-1994 | | 0 | 2 years |
| Horizon Season 1994 Episode 3 – The Man Who Made Up His Mind | Jan-24-1994 | | 0 | 2 years |
| Horizon Season 1994 Episode 2 – The Last Mammoth | Jan-17-1994 | | 0 | 2 years |
| Horizon Season 1994 Episode 1 – Small Arms, Soft Targets | Jan-10-1994 | | 0 | 2 years |
1993 | Horizon Season 1993 Episode 21 – Life is Impossible | Jun-28-1993 | | 0 | 2 years |
| Horizon Season 1993 Episode 20 – Chimp Talk | Jun-21-1993 | | 0 | 2 years |
| Horizon Season 1993 Episode 19 – A Vital Poison | Jun-14-1993 | | 0 | 2 years |
| Horizon Season 1993 Episode 18 – The Electronic Frontier | Jun-07-1993 | | 0 | 2 years |
| Horizon Season 1993 Episode 17 – Wot U Looking At? | May-24-1993 | | 0 | 2 years |
| Horizon Season 1993 Episode 16 – Allergic to the 20th Century | May-10-1993 | | 0 | 2 years |
| Horizon Season 1993 Episode 15 – The New Alchemists | Apr-19-1993 | | 0 | 2 years |
| Horizon Season 1993 Episode 14 – Ghosts in the Dinosaur Graveyard | Apr-05-1993 | | 0 | 2 years |
| Horizon Season 1993 Episode 13 – Dante Goes to Hell | Mar-29-1993 | | 0 | 2 years |
| Horizon Season 1993 Episode 12 – Resurrecting the Dead Sea Scrolls | Mar-22-1993 | | 0 | 2 years |
| Horizon Season 1993 Episode 11 – Whatever Happened to Star Wars | Mar-15-1993 | | 0 | 2 years |
| Horizon Season 1993 Episode 10 – Iceman (Update) | Mar-08-1993 | | 0 | 2 years |
| Horizon Season 1993 Episode 9 – Here Be Monsters | Mar-01-1993 | | 0 | 2 years |
| Horizon Season 1993 Episode 8 – The Pyramid Builders | Feb-22-1993 | | 0 | 2 years |
| Horizon Season 1993 Episode 7 – Suggers, Fruggers and Data-Muggers | Feb-15-1993 | | 0 | 2 years |
| Horizon Season 1993 Episode 6 – Mars Alive | Feb-08-1993 | | 0 | 2 years |
| Horizon Season 1993 Episode 5 – No Ordinary Genius (2) | Feb-01-1993 | | 0 | 2 years |
| Horizon Season 1993 Episode 4 – No Ordinary Genius (1) | Jan-25-1993 | | 0 | 2 years |
| Horizon Season 1993 Episode 3 – TB – The Forgotten Plague | Jan-18-1993 | | 0 | 2 years |
| Horizon Season 1993 Episode 2 – Cheating Time | Jan-11-1993 | | 0 | 2 years |
| Horizon Season 1993 Episode 1 – Awakening the Frozen Addicts | Jan-04-1993 | | 0 | 2 years |
1992 | Horizon Season 1992 Episode 19 – Genes R Us | Jun-15-1992 | | 0 | 2 years |
| Horizon Season 1992 Episode 18 – A Question of Sport… | Jun-08-1992 | | 0 | 2 years |
| Horizon Season 1992 Episode 17 – Dodging Doomsday | Jun-01-1992 | | 0 | 2 years |
| Horizon Season 1992 Episode 16 – Fast Life in the Food Chain | May-18-1992 | | 0 | 2 years |
| Horizon Season 1992 Episode 15 – Taking the Credit | May-11-1992 | | 0 | 2 years |
| Horizon Season 1992 Episode 14 – Iceman | Apr-27-1992 | | 0 | 2 years |
| Horizon Season 1992 Episode 13 – The Man Who Moved the Mountains | Apr-13-1992 | | 0 | 2 years |
| Horizon Season 1992 Episode 12 – Before Babel | Apr-06-1992 | | 0 | 2 years |
| Horizon Season 1992 Episode 11 – A Diet for a Lifetime | Mar-30-1992 | | 0 | 2 years |
| Horizon Season 1992 Episode 10 – Hot Jam in the Doughnut | Mar-16-1992 | | 0 | 2 years |
| Horizon Season 1992 Episode 9 – The Strange Life and Death of Dr. Turing | Mar-09-1992 | | 0 | 2 years |
| Horizon Season 1992 Episode 8 – An Expensive Theology | Mar-02-1992 | | 0 | 2 years |
| Horizon Season 1992 Episode 7 – Hitler’s Bomb | Feb-24-1992 | | 0 | 2 years |
| Horizon Season 1992 Episode 6 – The Black Sun | Feb-17-1992 | | 0 | 2 years |
| Horizon Season 1992 Episode 5 – Malaria: Battle of the Merozoites | Feb-03-1992 | | 0 | 2 years |
| Horizon Season 1992 Episode 4 – In Search of the Noble Savage | Jan-27-1992 | | 0 | 2 years |
| Horizon Season 1992 Episode 3 – Molecules With Sunglasses | Jan-20-1992 | | 0 | 2 years |
| Horizon Season 1992 Episode 2 – Pest Wars | Jan-13-1992 | | 0 | 2 years |
| Horizon Season 1992 Episode 1 – The Shadow of Breast Cancer | Jan-06-1992 | | 0 | 2 years |
1991 | Horizon Season 1991 Episode 23 – T-Rex Exposed | Jul-01-1991 | | 0 | 2 years |
| Horizon Season 1991 Episode 22 – Half Hearted About Semi-Skimmed | Jun-24-1991 | | 0 | 2 years |
| Horizon Season 1991 Episode 21 – The Long Road to the West | Jun-17-1991 | | 0 | 2 years |
| Horizon Season 1991 Episode 20 – Food For Thought | Jun-10-1991 | | 0 | 2 years |
| Horizon Season 1991 Episode 19 – Of Big Bangs, Stick Men and Galactic Holes | Jun-03-1991 | | 0 | 2 years |
| Horizon Season 1991 Episode 18 – Camelford – A Bitter Aftertaste | May-20-1991 | | 0 | 2 years |
| Horizon Season 1991 Episode 17 – Emerging Viruses | May-13-1991 | | 0 | 2 years |
| Horizon Season 1991 Episode 16 – Colonising Cyberspace | Apr-29-1991 | | 0 | 2 years |
| Horizon Season 1991 Episode 15 – Inside Chernobyl’s Sarcophagus | Apr-22-1991 | | 0 | 2 years |
| Horizon Season 1991 Episode 14 – The First Americans | Apr-15-1991 | | 0 | 2 years |
| Horizon Season 1991 Episode 13 – Measuring the Roof of the World | Mar-25-1991 | | 0 | 2 years |
| Horizon Season 1991 Episode 12 – The Terracotta Time Machine | Mar-18-1991 | | 0 | 2 years |
| Horizon Season 1991 Episode 11 – Cashing in on Paradise | Mar-11-1991 | | 0 | 2 years |
| Horizon Season 1991 Episode 10 – Playing at Noah | Mar-04-1991 | | 0 | 2 years |
| Horizon Season 1991 Episode 9 – The Curse of Karash | Feb-25-1991 | | 0 | 2 years |
| Horizon Season 1991 Episode 8 – The Day the Earth Melted | Feb-25-1991 | | 0 | 2 years |
| Horizon Season 1991 Episode 7 – California Dreaming | Feb-11-1991 | | 0 | 2 years |
| Horizon Season 1991 Episode 6 – Two Weeks to Save the Earth | Feb-10-1991 | | 0 | 2 years |
| Horizon Season 1991 Episode 5 – Small Problems with the Mirror | Feb-04-1991 | | 0 | 2 years |
| Horizon Season 1991 Episode 4 – Coming In from the Cold | Jan-28-1991 | | 0 | 2 years |
| Horizon Season 1991 Episode 3 – Smokers Can Harm Your Health | Jan-21-1991 | | 0 | 2 years |
| Horizon Season 1991 Episode 2 – Keen as Mustard | Jan-14-1991 | | 0 | 2 years |
| Horizon Season 1991 Episode 1 – Sudden Death | Jan-07-1991 | | 0 | 2 years |
1990 | Horizon Season 1990 Episode 20 – AIDS: A Quest for a Cure | Jun-25-1990 | | 0 | 2 years |
| Horizon Season 1990 Episode 19 – Signs of Life | Jun-11-1990 | | 0 | 2 years |
| Horizon Season 1990 Episode 18 – The Child Mothers | Jun-04-1990 | | 0 | 2 years |
| Horizon Season 1990 Episode 17 – Do Cows Make You Mad? | May-21-1990 | | 0 | 2 years |
| Horizon Season 1990 Episode 16 – Legacy of a Volcano | May-14-1990 | | 0 | 2 years |
| Horizon Season 1990 Episode 15 – The Intelligent Island | Apr-30-1990 | | 0 | 2 years |
| Horizon Season 1990 Episode 14 – The Company of Ants and Bees | Apr-23-1990 | | 0 | 2 years |
| Horizon Season 1990 Episode 13 – The Sharpest Shot of the Universe | Apr-09-1990 | | 0 | 2 years |
| Horizon Season 1990 Episode 12 – The Quake of ’89 – The Final Warning? | Apr-02-1990 | | 0 | 2 years |
| Horizon Season 1990 Episode 11 – Cold Fusion | Mar-26-1990 | | 0 | 2 years |
| Horizon Season 1990 Episode 10 – The Britannic Greenhouse | Mar-19-1990 | | 0 | 2 years |
| Horizon Season 1990 Episode 9 – Hurricane! | Mar-12-1990 | | 0 | 2 years |
| Horizon Season 1990 Episode 8 – The 10,000 Year Test | Mar-05-1990 | | 0 | 2 years |
| Horizon Season 1990 Episode 7 – The First 14 Days | Feb-19-1990 | | 0 | 2 years |
| Horizon Season 1990 Episode 6 – Guess What’s Coming to Dinner? | Feb-12-1990 | | 0 | 2 years |
| Horizon Season 1990 Episode 5 – Encounter With Neptune | Feb-05-1990 | | 0 | 2 years |
| Horizon Season 1990 Episode 4 – From Earth to Miranda | Jan-29-1990 | | 0 | 2 years |
| Horizon Season 1990 Episode 3 – Food Irradiation: Would You Buy It? | Jan-22-1990 | | 0 | 2 years |
| Horizon Season 1990 Episode 2 – Medicine 2000 | Jan-15-1990 | | 0 | 2 years |
| Horizon Season 1990 Episode 1 – Oil Spill | Jan-08-1990 | | 0 | 2 years |
1989 | Horizon Season 1989 Episode 20 – Time of Darkness | Jun-26-1989 | | 0 | 2 years |
| Horizon Season 1989 Episode 19 – Newpin: A Lifetime | Jun-19-1989 | | 0 | 2 years |
| Horizon Season 1989 Episode 18 – Clive Sinclair: The Anatomy of an Inventor | Jun-12-1989 | | 0 | 2 years |
| Horizon Season 1989 Episode 17 – The New Sixth Sense | May-22-1989 | | 0 | 2 years |
| Horizon Season 1989 Episode 16 – Crash | May-15-1989 | | 0 | 2 years |
| Horizon Season 1989 Episode 15 – Jubilee | May-08-1989 | | 0 | 2 years |
| Horizon Season 1989 Episode 14 – Why Buildings Make You Sick | Apr-24-1989 | | 0 | 2 years |
| Horizon Season 1989 Episode 13 – A Wonderful Life | Apr-17-1989 | | 0 | 2 years |
| Horizon Season 1989 Episode 12 – Who Will Make Me Better? | Apr-03-1989 | | 0 | 2 years |
| Horizon Season 1989 Episode 11 – Trial in the Jungle | Mar-20-1989 | | 0 | 2 years |
| Horizon Season 1989 Episode 10 – Black Schizophrenia | Mar-13-1989 | | 0 | 2 years |
| Horizon Season 1989 Episode 9 – Concerto | Mar-06-1989 | | 0 | 2 years |
| Horizon Season 1989 Episode 8 – In My Lifetime? | Feb-27-1989 | | 0 | 2 years |
| Horizon Season 1989 Episode 7 – Gaze in Wonder | Feb-20-1989 | | 0 | 2 years |
| Horizon Season 1989 Episode 6 – In the Last Resort | Feb-13-1989 | | 0 | 2 years |
| Horizon Season 1989 Episode 5 – Wasting the Alps | Feb-06-1989 | | 0 | 2 years |
| Horizon Season 1989 Episode 4 – Smart Weapons | Jan-30-1989 | | 0 | 2 years |
| Horizon Season 1989 Episode 3 – Perils of the Deep | Jan-23-1989 | | 0 | 2 years |
| Horizon Season 1989 Episode 2 – The Poison that Waits | Jan-16-1989 | | 0 | 2 years |
| Horizon Season 1989 Episode 1 – The Book of Man | Jan-09-1989 | | 0 | 2 years |
1988 | Horizon Season 1988 Episode 25 – The Quest for Tannu Tuva | Jul-04-1988 | | 0 | 2 years |
| Horizon Season 1988 Episode 24 – Believe Me | Jun-27-1988 | | 0 | 2 years |
| Horizon Season 1988 Episode 23 – Superconductor – The Race for the Prize | Jun-13-1988 | | 0 | 2 years |
| Horizon Season 1988 Episode 22 – A Good Test? | Jun-06-1988 | | 0 | 2 years |
| Horizon Season 1988 Episode 21 – A Newsday Revolution | May-23-1988 | | 0 | 2 years |
| Horizon Season 1988 Episode 20 – The Hope of Progress | May-16-1988 | | 0 | 2 years |
| Horizon Season 1988 Episode 19 – Traces of Murder | May-09-1988 | | 0 | 2 years |
| Horizon Season 1988 Episode 18 – Cancer at Bay | May-02-1988 | | 0 | 2 years |
| Horizon Season 1988 Episode 17 – Doctors to Be – Welcome to the Real World | Apr-25-1988 | | 0 | 2 years |
| Horizon Season 1988 Episode 16 – Doctors to Be – The Knowledge | Apr-24-1988 | | 0 | 2 years |
| Horizon Season 1988 Episode 15 – Doctors to Be – Trial by Interview | Apr-23-1988 | | 0 | 2 years |
| Horizon Season 1988 Episode 14 – Easter Islands – The Story | Apr-18-1988 | | 0 | 2 years |
| Horizon Season 1988 Episode 13 – Easter Islands – The Secret | Apr-11-1988 | | 0 | 2 years |
| Horizon Season 1988 Episode 12 – The Heart of Another | Mar-28-1988 | | 0 | 2 years |
| Horizon Season 1988 Episode 11 – Purple Warrior – Limited War | Mar-14-1988 | | 0 | 2 years |
| Horizon Season 1988 Episode 10 – Purple Warrior – Rules of Engagement | Mar-07-1988 | | 0 | 2 years |
| Horizon Season 1988 Episode 9 – Patients on Trial | Feb-29-1988 | | 0 | 2 years |
| Horizon Season 1988 Episode 8 – Thinking | Feb-22-1988 | | 0 | 2 years |
| Horizon Season 1988 Episode 7 – Struggling for Control | Feb-15-1988 | | 0 | 2 years |
| Horizon Season 1988 Episode 6 – The Greenhouse Effect | Feb-08-1988 | | 0 | 2 years |
| Horizon Season 1988 Episode 5 – Death of the Working Classes | Feb-01-1988 | | 0 | 2 years |
| Horizon Season 1988 Episode 4 – The Canal in the Jungle | Jan-25-1988 | | 0 | 2 years |
| Horizon Season 1988 Episode 3 – Playing With Madness | Jan-18-1988 | | 0 | 2 years |
| Horizon Season 1988 Episode 2 – Death of a Star | Jan-11-1988 | | 0 | 2 years |
| Horizon Season 1988 Episode 1 – The Transpanted Brain | Jan-04-1988 | | 0 | 2 years |
1987 | Horizon Season 1987 Episode 23 – Janice’s Choice | Jun-29-1987 | | 0 | 2 years |
| Horizon Season 1987 Episode 22 – In the Light of New Information | Jun-22-1987 | | 0 | 2 years |
| Horizon Season 1987 Episode 21 – To Catch a Falling Star | May-15-1987 | | 0 | 2 years |
| Horizon Season 1987 Episode 20 – The Riddle of the Joints | Jun-08-1987 | | 0 | 2 years |
| Horizon Season 1987 Episode 19 – Aircrash: The Burning Issue | Jun-01-1987 | | 0 | 2 years |
| Horizon Season 1987 Episode 18 – The Anthropic Principle | May-18-1987 | | 0 | 2 years |
| Horizon Season 1987 Episode 17 – Making Sex Pay | May-11-1987 | | 0 | 2 years |
| Horizon Season 1987 Episode 16 – Life Story | Apr-27-1987 | | 0 | 2 years |
| Horizon Season 1987 Episode 15 – After Chernobyl – Closer To Home | Apr-13-1987 | | 0 | 2 years |
| Horizon Season 1987 Episode 14 – Trial Babies | Apr-06-1987 | | 0 | 2 years |
| Horizon Season 1987 Episode 13 – Broken Images | Mar-30-1987 | | 0 | 2 years |
| Horizon Season 1987 Episode 12 – The Magma Chamber | Mar-23-1987 | | 0 | 2 years |
| Horizon Season 1987 Episode 11 – To Engineer Is Human | Mar-16-1987 | | 0 | 2 years |
| Horizon Season 1987 Episode 10 – Police Stress: The John Wayne Syndrome | Mar-09-1987 | | 0 | 2 years |
| Horizon Season 1987 Episode 9 – Can AIDS Be Stopped | Mar-02-1987 | | 0 | 2 years |
| Horizon Season 1987 Episode 8 – The Return of the Osprey | Feb-23-1987 | | 0 | 2 years |
| Horizon Season 1987 Episode 7 – Energy From Outer Space | Feb-16-1987 | | 0 | 2 years |
| Horizon Season 1987 Episode 6 – Bruno Bettelheim: A Sense of Surviving | Feb-09-1987 | | 0 | 2 years |
| Horizon Season 1987 Episode 5 – Bruno Bettelheim: The Man Who Cared For Children | Feb-02-1987 | | 0 | 2 years |
| Horizon Season 1987 Episode 4 – Riding The Stack | Jan-26-1987 | | 0 | 2 years |
| Horizon Season 1987 Episode 3 – The Blind Watchmaker | Jan-19-1987 | | 0 | 2 years |
| Horizon Season 1987 Episode 2 – The Search for the Disappeared | Jan-12-1987 | | 0 | 2 years |
| Horizon Season 1987 Episode 1 – The Twentyfive Hour Clock | Jan-05-1987 | | 0 | 2 years |
1986 | Horizon Season 1986 Episode 23 – Doctors to Be | Jun-30-1986 | | 0 | 2 years |
| Horizon Season 1986 Episode 22 – Battered Baby – Breaking the Chain | Jun-23-1986 | | 0 | 2 years |
| Horizon Season 1986 Episode 21 – Battered Baby – From Generation to Generation | Jun-16-1986 | | 0 | 2 years |
| Horizon Season 1986 Episode 20 – Who Built Stonehenge? | Jun-09-1986 | | 0 | 2 years |
| Horizon Season 1986 Episode 19 – Uranus Encounter | May-26-1986 | | 0 | 2 years |
| Horizon Season 1986 Episode 18 – A Handful of Sugar With a Pinch of Salt | May-19-1986 | | 0 | 2 years |
| Horizon Season 1986 Episode 17 – What Makes an Animal Smart? | May-12-1986 | | 0 | 2 years |
| Horizon Season 1986 Episode 16 – Twice Five Plus the Wings of a Bird | Apr-28-1986 | | 0 | 2 years |
| Horizon Season 1986 Episode 15 – The Men Who Bottled a Cow | Apr-21-1986 | | 0 | 2 years |
| Horizon Season 1986 Episode 14 – Nice Guys Finish First | Apr-14-1986 | | 0 | 2 years |
| Horizon Season 1986 Episode 13 – The Case of the Frozen Addicts | Apr-07-1986 | | 0 | 2 years |
| Horizon Season 1986 Episode 12 – AIDS: A Strange and Deadly Virus | Mar-24-1986 | | 0 | 2 years |
| Horizon Season 1986 Episode 11 – In the Wake of HMS Sheffield | Mar-17-1986 | | 0 | 2 years |
| Horizon Season 1986 Episode 10 – Hi-Tech a la Francaise | Mar-10-1986 | | 0 | 2 years |
| Horizon Season 1986 Episode 9 – The New Face of Leprosy | Mar-03-1986 | | 0 | 2 years |
| Horizon Season 1986 Episode 8 – The Children of Eve | Feb-24-1986 | | 0 | 2 years |
| Horizon Season 1986 Episode 7 – Science…Fiction? | Feb-17-1986 | | 0 | 2 years |
| Horizon Season 1986 Episode 6 – The Wrong Stuff | Feb-10-1986 | | 0 | 2 years |
| Horizon Season 1986 Episode 5 – Outbreak: The Microbe Masters the Mould | Feb-03-1986 | | 0 | 2 years |
| Horizon Season 1986 Episode 4 – The Mould, the Myth and the Microbe | Jan-27-1986 | | 0 | 2 years |
| Horizon Season 1986 Episode 3 – Bitter Cold | Jan-20-1986 | | 0 | 2 years |
| Horizon Season 1986 Episode 2 – Genesis | Jan-13-1986 | | 0 | 2 years |
| Horizon Season 1986 Episode 1 – Are You a Racist? | Jan-06-1986 | | 0 | 2 years |
1985 | Horizon Season 1985 Episode 15 – A Prize Discovery | Apr-29-1985 | | 0 | 2 years |
| Horizon Season 1985 Episode 14 – IRAS – The Supercooled Eye | Apr-22-1985 | | 0 | 2 years |
| Horizon Season 1985 Episode 13 – The Goddess of the Earth | Apr-15-1985 | | 0 | 2 years |
| Horizon Season 1985 Episode 12 – The Food Allergy War | Apr-01-1985 | | 0 | 2 years |
| Horizon Season 1985 Episode 11 – How to Film the Impossible | Mar-25-1985 | | 0 | 2 years |
| Horizon Season 1985 Episode 10 – Careering On | Mar-18-1985 | | 0 | 2 years |
| Horizon Season 1985 Episode 9 – Eurekaaargh! | Mar-11-1985 | | 0 | 2 years |
| Horizon Season 1985 Episode 8 – What Einstein Never Knew | Mar-04-1985 | | 0 | 2 years |
| Horizon Season 1985 Episode 7 – The Careful Predator | Feb-25-1985 | | 0 | 2 years |
| Horizon Season 1985 Episode 6 – The Theatre of War | Feb-11-1985 | | 0 | 2 years |
| Horizon Season 1985 Episode 5 – The Mystery of the Left Hand | Feb-04-1985 | | 0 | 2 years |
| Horizon Season 1985 Episode 4 – A Mission to Heal | Jan-28-1985 | | 0 | 2 years |
| Horizon Season 1985 Episode 3 – Decoding Danebury | Jan-21-1985 | | 0 | 2 years |
| Horizon Season 1985 Episode 2 – A World of Their Own | Jan-14-1985 | | 0 | 2 years |
| Horizon Season 1985 Episode 1 – Colourful Notions | Jan-07-1985 | | 0 | 2 years |
1984 | Horizon Season 1984 Episode 22 – Supercharged | Dec-17-1984 | | 0 | 2 years |
| Horizon Season 1984 Episode 21 – A Mathematical Mystery Tour | Dec-10-1984 | | 0 | 2 years |
| Horizon Season 1984 Episode 20 – Ivan | Dec-03-1984 | | 0 | 2 years |
| Horizon Season 1984 Episode 19 – Global Village | Nov-26-1984 | | 0 | 2 years |
| Horizon Season 1984 Episode 18 – The Brain Puzzle | Nov-19-1984 | | 0 | 2 years |
| Horizon Season 1984 Episode 17 – Picking Winners | Nov-12-1984 | | 0 | 2 years |
| Horizon Season 1984 Episode 16 – Contented Cows and Other Animals | Nov-05-1984 | | 0 | 2 years |
| Horizon Season 1984 Episode 15 – The Malvern Link | May-07-1984 | | 0 | 2 years |
| Horizon Season 1984 Episode 14 – A Cruel Inheritance | Apr-30-1984 | | 0 | 2 years |
| Horizon Season 1984 Episode 13 – The Mind of a Murderer – The Mask of Madness | Apr-23-1984 | | 0 | 2 years |
| Horizon Season 1984 Episode 12 – The Mind of a Murderer – The Case of the Hillside Strangler | Apr-16-1984 | | 0 | 2 years |
| Horizon Season 1984 Episode 11 – Professor Bonner and the Slime Moulds | Apr-09-1984 | | 0 | 2 years |
| Horizon Season 1984 Episode 10 – Signs of the Apes, Songs of the Whales | Mar-26-1984 | | 0 | 2 years |
| Horizon Season 1984 Episode 9 – Prisoners of Incest | Mar-19-1984 | | 0 | 2 years |
| Horizon Season 1984 Episode 8 – A Normal Face | Mar-12-1984 | | 0 | 2 years |
| Horizon Season 1984 Episode 7 – Reflections on a River | Mar-05-1984 | | 0 | 2 years |
| Horizon Season 1984 Episode 6 – The Conquest of Parasites | Feb-27-1984 | | 0 | 2 years |
| Horizon Season 1984 Episode 5 – Valley of the Inca | Feb-13-1984 | | 0 | 2 years |
| Horizon Season 1984 Episode 4 – Spies in the Wires | Jan-30-1984 | | 0 | 2 years |
| Horizon Season 1984 Episode 3 – A New Green Revolution? | Jan-23-1984 | | 0 | 2 years |
| Horizon Season 1984 Episode 2 – Microworld! | Jan-16-1984 | | 0 | 2 years |
| Horizon Season 1984 Episode 1 – The Intelligence Man | Jan-09-1984 | | 0 | 2 years |
1983 | Horizon Season 1983 Episode 24 – The Academy | Dec-12-1983 | | 0 | 2 years |
| Horizon Season 1983 Episode 23 – Cancer – The Pattern in the Genes | Dec-05-1983 | | 0 | 2 years |
| Horizon Season 1983 Episode 22 – Prisoner or Patient? | Nov-28-1983 | | 0 | 2 years |
| Horizon Season 1983 Episode 21 – The Earthquake Connection | Nov-14-1983 | | 0 | 2 years |
| Horizon Season 1983 Episode 20 – China’s Child | Nov-07-1983 | | 0 | 2 years |
| Horizon Season 1983 Episode 19 – A Child’s Guide To Languages | Oct-31-1983 | | 0 | 2 years |
| Horizon Season 1983 Episode 18 – The Cruel Choice | Oct-24-1983 | | 0 | 2 years |
| Horizon Season 1983 Episode 17 – Professor Hawking’s Universe | Oct-17-1983 | | 0 | 2 years |
| Horizon Season 1983 Episode 16 – Dr. Priestley and the Breath of Life | Oct-10-1983 | | 0 | 2 years |
| Horizon Season 1983 Episode 15 – The Artificial Heart | Oct-03-1983 | | 0 | 2 years |
| Horizon Season 1983 Episode 14 – The Case of ESP | Sep-26-1983 | | 0 | 2 years |
| Horizon Season 1983 Episode 13 – Killer in the Village | Apr-25-1983 | | 0 | 2 years |
| Horizon Season 1983 Episode 12 – Sixty Minutes to Meltdown | Apr-18-1983 | | 0 | 2 years |
| Horizon Season 1983 Episode 11 – Madness on Trial | Apr-11-1983 | | 0 | 2 years |
| Horizon Season 1983 Episode 10 – Better Mind the Computer | Mar-21-1983 | | 0 | 2 years |
| Horizon Season 1983 Episode 9 – Hard Rock | Mar-14-1983 | | 0 | 2 years |
| Horizon Season 1983 Episode 8 – The Great Plains Massacre | Mar-07-1983 | | 0 | 2 years |
| Horizon Season 1983 Episode 7 – British Science – On the Wrong Track? | Feb-28-1983 | | 0 | 2 years |
| Horizon Season 1983 Episode 6 – What Little Girls are Made of | Feb-21-1983 | | 0 | 2 years |
| Horizon Season 1983 Episode 5 – Talking Turtle | Feb-14-1983 | | 0 | 2 years |
| Horizon Season 1983 Episode 4 – How Much Can You Drink? | Feb-07-1983 | | 0 | 2 years |
| Horizon Season 1983 Episode 3 – The Geneva Event | Jan-24-1983 | | 0 | 2 years |
| Horizon Season 1983 Episode 2 – The Tropical Time Machine | Jan-17-1983 | | 0 | 2 years |
| Horizon Season 1983 Episode 1 – Sizewell Under Pressure | Jan-10-1983 | | 0 | 2 years |
1982 | Horizon Season 1982 Episode 22 – The Mysterious Mr. Tesla | Dec-20-1982 | | 0 | 2 years |
| Horizon Season 1982 Episode 21 – The State of the Planet | Dec-13-1982 | | 0 | 2 years |
| Horizon Season 1982 Episode 20 – The Chopper | Dec-06-1982 | | 0 | 2 years |
| Horizon Season 1982 Episode 19 – The Professor of Surgery | Nov-29-1982 | | 0 | 2 years |
| Horizon Season 1982 Episode 18 – Brave New Babies? | Nov-15-1982 | | 0 | 2 years |
| Horizon Season 1982 Episode 17 – The Scientist and the Baby | Nov-08-1982 | | 0 | 2 years |
| Horizon Season 1982 Episode 16 – Intimate Relations | Nov-01-1982 | | 0 | 2 years |
| Horizon Season 1982 Episode 15 – A Killing Rain | Oct-25-1982 | | 0 | 2 years |
| Horizon Season 1982 Episode 14 – The Case of the UFOs | Oct-18-1982 | | 0 | 2 years |
| Horizon Season 1982 Episode 13 – The Miracle of Life | Oct-11-1982 | | 0 | 2 years |
| Horizon Season 1982 Episode 12 – The Fatal Bargain | Apr-05-1982 | | 0 | 2 years |
| Horizon Season 1982 Episode 11 – The Private Face of Medicine | Mar-22-1982 | | 0 | 2 years |
| Horizon Season 1982 Episode 10 – The Future – Made in Japan? | Mar-15-1982 | | 0 | 2 years |
| Horizon Season 1982 Episode 9 – The Victims | Mar-08-1982 | | 0 | 2 years |
| Horizon Season 1982 Episode 8 – Shots in the Dark | Mar-01-1982 | | 0 | 2 years |
| Horizon Season 1982 Episode 7 – The Million Murdering Death | Feb-22-1982 | | 0 | 2 years |
| Horizon Season 1982 Episode 6 – The Cline Affair | Feb-15-1982 | | 0 | 2 years |
| Horizon Season 1982 Episode 5 – Notes of a Biology Watcher | Feb-08-1982 | | 0 | 2 years |
| Horizon Season 1982 Episode 4 – Whatever Happened to the Energy Crisis? | Feb-01-1982 | | 0 | 2 years |
| Horizon Season 1982 Episode 3 – The Sea Beyond the Dunes | Jan-25-1982 | | 0 | 2 years |
| Horizon Season 1982 Episode 2 – Finding A Voice | Jan-18-1982 | | 0 | 2 years |
| Horizon Season 1982 Episode 1 – The Secret of the Snake | Jan-11-1982 | | 0 | 2 years |
1981 | Horizon Season 1981 Episode 27 – Painting by Numbers | Dec-21-1981 | | 0 | 2 years |
| Horizon Season 1981 Episode 26 – The Race Against Time | Dec-07-1981 | | 0 | 2 years |
| Horizon Season 1981 Episode 25 – The Cornucopia | Nov-30-1981 | | 0 | 2 years |
| Horizon Season 1981 Episode 24 – The Pleasure Of Finding Things Out | Nov-23-1981 | | 0 | 2 years |
| Horizon Season 1981 Episode 23 – Death of the Dinosaurs | Nov-16-1981 | | 0 | 2 years |
| Horizon Season 1981 Episode 22 – The Race to Ruin | Nov-09-1981 | | 0 | 2 years |
| Horizon Season 1981 Episode 21 – Science for the People | Nov-02-1981 | | 0 | 2 years |
| Horizon Season 1981 Episode 20 – Butterflies or Barley? | Oct-26-1981 | | 0 | 2 years |
| Horizon Season 1981 Episode 19 – The Grid | Oct-19-1981 | | 0 | 2 years |
| Horizon Season 1981 Episode 18 – Breaking in Children | Oct-12-1981 | | 0 | 2 years |
| Horizon Season 1981 Episode 17 – The Hunt for the Legion Killer | Oct-05-1981 | | 0 | 2 years |
| Horizon Season 1981 Episode 16 – Heads I Win, Tails You Lose | Sep-28-1981 | | 0 | 2 years |
| Horizon Season 1981 Episode 15 – Resolution on Saturn – The Moons | Apr-13-1981 | | 0 | 2 years |
| Horizon Season 1981 Episode 14 – Resolution on Saturn – The Rings | Apr-11-1981 | | 0 | 2 years |
| Horizon Season 1981 Episode 13 – East of Bombay | Apr-06-1981 | | 0 | 2 years |
| Horizon Season 1981 Episode 12 – Did Darwin Get It Wrong? | Mar-30-1981 | | 0 | 2 years |
| Horizon Season 1981 Episode 11 – Voices From Silent Hands | Mar-23-1981 | | 0 | 2 years |
| Horizon Season 1981 Episode 10 – Hello Universe! | Mar-16-1981 | | 0 | 2 years |
| Horizon Season 1981 Episode 9 – Gentlemen, Lift Your Skirts | Mar-09-1981 | | 0 | 2 years |
| Horizon Season 1981 Episode 8 – West of Bangalore | Mar-02-1981 | | 0 | 2 years |
| Horizon Season 1981 Episode 7 – Who Will Deliver Your Baby? | Feb-16-1981 | | 0 | 2 years |
| Horizon Season 1981 Episode 6 – A is for Atom, B is for Bomb | Feb-09-1981 | | 0 | 2 years |
| Horizon Season 1981 Episode 5 – Living With Dying | Feb-02-1981 | | 0 | 2 years |
| Horizon Season 1981 Episode 4 – No-One Will Take Me Seriously | Jan-26-1981 | | 0 | 2 years |
| Horizon Season 1981 Episode 3 – The Qualyub Project | Jan-19-1981 | | 0 | 2 years |
| Horizon Season 1981 Episode 2 – A Whole New Medicine | Jan-12-1981 | | 0 | 2 years |
| Horizon Season 1981 Episode 1 – Spend and Prosper | Jan-05-1981 | | 0 | 2 years |
1980 | Horizon Season 1980 Episode 25 – Anatomy of a Volcano | Dec-15-1980 | | 0 | 2 years |
| Horizon Season 1980 Episode 24 – The Slatemakers | Dec-01-1980 | | 0 | 2 years |
| Horizon Season 1980 Episode 23 – The Spike | Nov-24-1980 | | 0 | 2 years |
| Horizon Season 1980 Episode 22 – The Mondragon Experiment | Nov-17-1980 | | 0 | 2 years |
| Horizon Season 1980 Episode 21 – Behind the Horoscope | Nov-10-1980 | | 0 | 2 years |
| Horizon Season 1980 Episode 20 – Smoker’s Luck | Nov-03-1980 | | 0 | 2 years |
| Horizon Season 1980 Episode 19 – Once In a Million Years | Oct-27-1980 | | 0 | 2 years |
| Horizon Season 1980 Episode 18 – The Dead Sea Lives | Oct-20-1980 | | 0 | 2 years |
| Horizon Season 1980 Episode 17 – The Way Out | Oct-13-1980 | | 0 | 2 years |
| Horizon Season 1980 Episode 16 – Moving Still | Oct-06-1980 | | 0 | 2 years |
| Horizon Season 1980 Episode 15 – The Other Kenya | Sep-29-1980 | | 0 | 2 years |
| Horizon Season 1980 Episode 14 – Little Boxes | Sep-22-1980 | | 0 | 2 years |
| Horizon Season 1980 Episode 13 – Beyond the Milky Way | Sep-15-1980 | | 0 | 2 years |
| Horizon Season 1980 Episode 12 – Invasion of the Virions | Sep-08-1980 | | 0 | 2 years |
| Horizon Season 1980 Episode 11 – Goodbye Gutenberg | Sep-01-1980 | | 0 | 2 years |
| Horizon Season 1980 Episode 10 – Magnet Earth | Mar-24-1980 | | 0 | 2 years |
| Horizon Season 1980 Episode 9 – Portrait of a Poison | Mar-17-1980 | | 0 | 2 years |
| Horizon Season 1980 Episode 8 – Encounter With Jupiter | Mar-10-1980 | | 0 | 2 years |
| Horizon Season 1980 Episode 7 – Cash From Trash | Mar-03-1980 | | 0 | 2 years |
| Horizon Season 1980 Episode 6 – The Big If… | Feb-25-1980 | | 0 | 2 years |
| Horizon Season 1980 Episode 5 – Cancer Detectives of Lin Xian | Feb-18-1980 | | 0 | 2 years |
| Horizon Season 1980 Episode 4 – A Sporting Chance | Feb-11-1980 | | 0 | 2 years |
| Horizon Season 1980 Episode 3 – Cleared For Takeoff | Feb-04-1980 | | 0 | 2 years |
| Horizon Season 1980 Episode 2 – You Are Old, Father William | Jan-21-1980 | | 0 | 2 years |
| Horizon Season 1980 Episode 1 – The Ghost Of The Amoco Cadiz | Jan-14-1980 | | 0 | 2 years |
1979 | Horizon Season 1979 Episode 25 – Decade | Dec-17-1979 | | 0 | 2 years |
| Horizon Season 1979 Episode 24 – The Fat in the Fire | Dec-10-1979 | | 0 | 2 years |
| Horizon Season 1979 Episode 23 – Uranium Goes Critical | Dec-03-1979 | | 0 | 2 years |
| Horizon Season 1979 Episode 22 – Darkness Visible | Nov-19-1979 | | 0 | 2 years |
| Horizon Season 1979 Episode 21 – A Treasury of Trees | Nov-12-1979 | | 0 | 2 years |
| Horizon Season 1979 Episode 20 – A Touch of Sensitivity | Nov-05-1979 | | 0 | 2 years |
| Horizon Season 1979 Episode 19 – Survival of the Fastest | Oct-29-1979 | | 0 | 2 years |
| Horizon Season 1979 Episode 18 – The Lost Waters of the Nile | Oct-22-1979 | | 0 | 2 years |
| Horizon Season 1979 Episode 17 – Dragnet for Diabetes | Oct-15-1979 | | 0 | 2 years |
| Horizon Season 1979 Episode 16 – The Race to Reshape Cars | Oct-08-1979 | | 0 | 2 years |
| Horizon Season 1979 Episode 15 – Tracks on the Oregon Trail | Oct-01-1979 | | 0 | 2 years |
| Horizon Season 1979 Episode 14 – Mexican Oil Dance | Sep-24-1979 | | 0 | 2 years |
| Horizon Season 1979 Episode 13 – The Robots Are Coming | May-28-1979 | | 0 | 2 years |
| Horizon Season 1979 Episode 12 – The Fight to Be Male | May-21-1979 | | 0 | 2 years |
| Horizon Season 1979 Episode 11 – Journey Through the Human Body | May-14-1979 | | 0 | 2 years |
| Horizon Season 1979 Episode 10 – Where Nothing Happens Twice | May-07-1979 | | 0 | 2 years |
| Horizon Season 1979 Episode 9 – Mr. Ludwig’s Tropical Dreamland | Apr-30-1979 | | 0 | 2 years |
| Horizon Season 1979 Episode 8 – Elements of Risk | Apr-23-1979 | | 0 | 2 years |
| Horizon Season 1979 Episode 7 – A Mediterranean Prospect | Apr-09-1979 | | 0 | 2 years |
| Horizon Season 1979 Episode 6 – The Real Bionic Man | Apr-02-1979 | | 0 | 2 years |
| Horizon Season 1979 Episode 5 – Bronze Age Blast-Off | Mar-26-1979 | | 0 | 2 years |
| Horizon Season 1979 Episode 4 – Sweet Solutions | Mar-19-1979 | | 0 | 2 years |
| Horizon Season 1979 Episode 3 – The Keys of Paradise | Mar-12-1979 | | 0 | 2 years |
| Horizon Season 1979 Episode 2 – In Search of Pegasus | Mar-05-1979 | | 0 | 2 years |
| Horizon Season 1979 Episode 1 – The Forever Fuel | Feb-26-1979 | | 0 | 2 years |
1978 | Horizon Season 1978 Episode 24 – The Red Deer of Rhum | Dec-29-1978 | | 0 | 2 years |
| Horizon Season 1978 Episode 23 – The Vital Spark | Nov-24-1978 | | 0 | 2 years |
| Horizon Season 1978 Episode 22 – The Big Sleep | Nov-17-1978 | | 0 | 2 years |
| Horizon Season 1978 Episode 21 – Divers Do It Deeper | Nov-10-1978 | | 0 | 2 years |
| Horizon Season 1978 Episode 20 – The Beersheva Experiment | Nov-03-1978 | | 0 | 2 years |
| Horizon Season 1978 Episode 19 – Innocent Slaughter | Sep-15-1978 | | 0 | 2 years |
| Horizon Season 1978 Episode 18 – Bags of Life | Sep-08-1978 | | 0 | 2 years |
| Horizon Season 1978 Episode 17 – Cashing in on the Ocean | Sep-01-1978 | | 0 | 2 years |
| Horizon Season 1978 Episode 16 – Careering into Science | Aug-25-1978 | | 0 | 2 years |
| Horizon Season 1978 Episode 15 – On a Different Track | Aug-18-1978 | | 0 | 2 years |
| Horizon Season 1978 Episode 14 – Prisoners of Hope | Aug-11-1978 | | 0 | 2 years |
| Horizon Season 1978 Episode 13 – A Whisper From Space | Aug-04-1978 | | 0 | 2 years |
| Horizon Season 1978 Episode 12 – The Tsetse Trap | Jul-28-1978 | | 0 | 2 years |
| Horizon Season 1978 Episode 11 – One Small Step | Jul-21-1978 | | 0 | 2 years |
| Horizon Season 1978 Episode 10 – Explosions in the Mind | Jul-14-1978 | | 0 | 2 years |
| Horizon Season 1978 Episode 9 – Now the Chips Are Down | Mar-31-1978 | | 0 | 2 years |
| Horizon Season 1978 Episode 8 – The New Breadline | Mar-24-1978 | | 0 | 2 years |
| Horizon Season 1978 Episode 7 – Light of the 21st Century | Mar-10-1978 | | 0 | 2 years |
| Horizon Season 1978 Episode 6 – The Eddystone Lights | Feb-24-1978 | | 0 | 2 years |
| Horizon Season 1978 Episode 5 – The Message In The Rocks | Feb-17-1978 | | 0 | 2 years |
| Horizon Season 1978 Episode 4 – Zero G | Feb-03-1978 | | 0 | 2 years |
| Horizon Season 1978 Episode 3 – I Don’t Want to Be a Burden | Jan-27-1978 | | 0 | 2 years |
| Horizon Season 1978 Episode 2 – A Land for All Reasons | Jan-20-1978 | | 0 | 2 years |
| Horizon Season 1978 Episode 1 – Living Machines | Jan-06-1978 | | 0 | 2 years |
1977 | Horizon Season 1977 Episode 25 – The Great Wine Revolution | Dec-23-1977 | | 0 | 2 years |
| Horizon Season 1977 Episode 24 – The Healing Nightmare | Dec-09-1977 | | 0 | 2 years |
| Horizon Season 1977 Episode 23 – Icarus’ Children | Dec-02-1977 | | 0 | 2 years |
| Horizon Season 1977 Episode 22 – The Rhine’s Revenge | Oct-21-1977 | | 0 | 2 years |
| Horizon Season 1977 Episode 21 – The Sunspot Mystery | Oct-07-1977 | | 0 | 2 years |
| Horizon Season 1977 Episode 20 – The Cry for Help | Sep-30-1977 | | 0 | 2 years |
| Horizon Season 1977 Episode 19 – Darwin’s Dream | Sep-23-1977 | | 0 | 2 years |
| Horizon Season 1977 Episode 18 – 40 Years of Murder | Sep-16-1977 | | 0 | 2 years |
| Horizon Season 1977 Episode 17 – Blueprints in the Bloodstream | Sep-09-1977 | | 0 | 2 years |
| Horizon Season 1977 Episode 16 – The River That Came Clean | Sep-02-1977 | | 0 | 2 years |
| Horizon Season 1977 Episode 15 – Horizon 2002 | Aug-26-1977 | | 0 | 2 years |
| Horizon Season 1977 Episode 14 – The Green Machine | Aug-05-1977 | | 0 | 2 years |
| Horizon Season 1977 Episode 13 – Silent Speech | Jul-29-1977 | | 0 | 2 years |
| Horizon Season 1977 Episode 12 – The Trouble with Medicine | Jul-22-1977 | | 0 | 2 years |
| Horizon Season 1977 Episode 11 – The Amazing Doctor Newton | Jul-15-1977 | | 0 | 2 years |
| Horizon Season 1977 Episode 10 – Genetic Roulette | Apr-01-1977 | | 0 | 2 years |
| Horizon Season 1977 Episode 9 – Dawn of the Solar Age | Mar-18-1977 | | 0 | 2 years |
| Horizon Season 1977 Episode 8 – One of Nature’s Hotels | Mar-11-1977 | | 0 | 2 years |
| Horizon Season 1977 Episode 7 – The Red Planet | Mar-04-1977 | | 0 | 2 years |
| Horizon Season 1977 Episode 6 – Hunters of the Seal | Feb-25-1977 | | 0 | 2 years |
| Horizon Season 1977 Episode 5 – The Guinea Pig and the Law | Feb-18-1977 | | 0 | 2 years |
| Horizon Season 1977 Episode 4 – The Human Animal | Feb-04-1977 | | 0 | 2 years |
| Horizon Season 1977 Episode 3 – The Ape That Stood Up | Jan-21-1977 | | 0 | 2 years |
| Horizon Season 1977 Episode 2 – The Pill for the People | Jan-14-1977 | | 0 | 2 years |
| Horizon Season 1977 Episode 1 – A Smile for a Crocodile | Jan-07-1977 | | 0 | 2 years |
1976 | Horizon Season 1976 Episode 32 – The Mystery of King Arthur and His Round Table | Dec-20-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 31 – Half-Way to 1984 | Dec-13-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 30 – The Long Valley | Dec-06-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 29 – Secrets of a Coral Island | Nov-29-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 28 – A Child of Our Own | Nov-22-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 27 – The Selfish Gene | Nov-15-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 26 – Billion Dollar Bubble | Nov-08-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 25 – The Hot-Blooded Dinosaurs | Nov-01-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 24 – The Bull’s Eye War | Oct-25-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 23 – What’s Wrong With the Sun? | Jun-14-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 22 – A Home Like Ours… A Story of Four Children | Jun-07-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 21 – The Great British Drought | May-31-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 20 – Dying | May-24-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 19 – The Children of Peru | May-17-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 18 – The Planets | May-10-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 17 – Why Did Stuart Die? | May-03-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 16 – A Lesson for Teachers | Apr-26-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 15 – The Vision of the Blind | Apr-12-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 14 – Geronimo’s Children | Apr-05-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 13 – The Pathway from Madness | Mar-29-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 12 – The World of Margaret Mead | Mar-22-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 11 – The Edelin Affair | Mar-15-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 10 – The Chemical Dream | Mar-08-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 9 – Inside the Shark | Mar-01-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 8 – The Lords of the Labyrinth | Feb-23-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 7 – The Case of the Bermuda Triangle | Feb-16-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 6 – A Question of Trust | Feb-09-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 5 – King Coal Revived | Feb-02-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 4 – The Incredible Machine | Jan-26-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 3 – A Fair Share of What Little We Have | Jan-19-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 2 – Intimate Strangers | Jan-12-1976 | | 0 | 2 years |
| Horizon Season 1976 Episode 1 – The Transplant Experience | Jan-05-1976 | | 0 | 2 years |
1975 | Horizon Season 1975 Episode 26 – The Trobriand Experiment | Dec-29-1975 | | 0 | 2 years |
| Horizon Season 1975 Episode 25 – Meditation and the Mind | Aug-18-1975 | | 0 | 2 years |
| Horizon Season 1975 Episode 24 – Cannabis | Aug-11-1975 | | 0 | 2 years |
| Horizon Season 1975 Episode 23 – To Die, to Live – The Survivors of Hiroshima | Aug-04-1975 | | 0 | 2 years |
| Horizon Season 1975 Episode 22 – Happy Catastrophe | Jul-28-1975 | | 0 | 2 years |
| Horizon Season 1975 Episode 21 – The Sickly Sea | Jul-21-1975 | | 0 | 2 years |
| Horizon Season 1975 Episode 20 – How Do You Read? | Jul-14-1975 | | 0 | 2 years |
| Horizon Season 1975 Episode 19 – The Greatest Advance Since the Wheel? | Jul-07-1975 | | 0 | 2 years |
| Horizon Season 1975 Episode 18 – Strange Sleep | Jun-30-1975 | | 0 | 2 years |
| Horizon Season 1975 Episode 17 – The Cleanest Place in the World | Jun-23-1975 | | 0 | 2 years |
| Horizon Season 1975 Episode 16 – The Three Chord Trick | Jun-16-1975 | | 0 | 2 years |
| Horizon Season 1975 Episode 15 – The Glazed Outlook | Jun-09-1975 | | 0 | 2 years |
| Horizon Season 1975 Episode 14 – The McMaster Experiment | Jun-02-1975 | | 0 | 2 years |
| Horizon Season 1975 Episode 13 – Benjamin | May-19-1975 | | 0 | 2 years |
| Horizon Season 1975 Episode 12 – The Bulldog’s Last Bark | May-12-1975 | | 0 | 2 years |
| Horizon Season 1975 Episode 11 – Brain Poison | May-05-1975 | | 0 | 2 years |
| Horizon Season 1975 Episode 10 – A Spoonful of Roughage | Apr-28-1975 | | 0 | 2 years |
| Horizon Season 1975 Episode 9 – Not the Cheapest, But the Best | Apr-21-1975 | | 0 | 2 years |
| Horizon Season 1975 Episode 8 – The Overworked Miracle | Apr-14-1975 | | 0 | 2 years |
| Horizon Season 1975 Episode 7 – The Long, Long Walkabout | Apr-07-1975 | | 0 | 2 years |
| Horizon Season 1975 Episode 6 – Project Fido | Feb-24-1975 | | 0 | 2 years |
| Horizon Season 1975 Episode 5 – The Change of Life | Feb-17-1975 | | 0 | 2 years |
| Horizon Season 1975 Episode 4 – The Unsafe Sea | Feb-10-1975 | | 0 | 2 years |
| Horizon Season 1975 Episode 3 – A Time to Be Born | Jan-27-1975 | | 0 | 2 years |
| Horizon Season 1975 Episode 2 – The Killer Dust | Jan-20-1975 | | 0 | 2 years |
| Horizon Season 1975 Episode 1 – The Cleanest Place in the World | Jan-06-1975 | | 0 | 2 years |
1974 | Horizon Season 1974 Episode 32 – The Lysenko Affair | Dec-30-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 31 – How on Earth Did They Do That? | Dec-23-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 30 – The Neglected Harvest | Dec-16-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 29 – Joey | Dec-09-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 28 – The Other Way | Nov-11-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 27 – The First Signs of Washoe | Nov-04-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 26 – Do as You Are Told | Oct-28-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 25 – An Unholy Scramble | Sep-02-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 24 – Adam or Eve? | Aug-12-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 23 – Listen and Be Loyal | Aug-05-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 22 – What Price Steak? | Jul-29-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 21 – Mines, Minerals and Men | Jul-22-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 20 – The Immigrant Doctors | Jul-15-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 19 – The Race for the Double Helix | Jul-08-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 18 – Hills of Promise | Jul-01-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 17 – Who Needs Skills? | Jun-24-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 16 – The Secrets of Sleep | Jun-10-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 15 – Search for Life | Jun-10-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 14 – Bridges: When It Comes to the Crunch | Jun-03-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 13 – A Noah’s Ark for Europe | May-13-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 12 – The Hunting of the Quark | May-06-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 11 – This Yankee Dodge Beats Mesmerism Hollow | Apr-29-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 10 – The First Ten Years | Apr-22-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 9 – Fusion: The Energy Promise | Mar-11-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 8 – The Future Goes Boom | Mar-04-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 7 – Where Did the Colorado Go? | Feb-18-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 6 – The Writing on the Wall | Feb-11-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 5 – Pedal Power | Feb-04-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 4 – The Great Fish Hunt | Jan-28-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 3 – Never Too Late to Learn | Jan-21-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 2 – Bird Brain – The Mystery of Bird Navigation | Jan-14-1974 | | 0 | 2 years |
| Horizon Season 1974 Episode 1 – A Matter of Self-Defense | Jan-07-1974 | | 0 | 2 years |
1973 | Horizon Season 1973 Episode 33 – Kula, a Reason for Giving | Dec-24-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 32 – Digging Up the Future | Dec-17-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 31 – An Element of Mystery | Dec-03-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 30 – Air Crash Detective | Nov-26-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 29 – Carry on Smoking | Nov-05-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 28 – The Steadfast Tin Soldier | Oct-29-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 27 – What’s so Big About Us? | Oct-22-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 26 – Black Holes of Gravity | Oct-15-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 25 – Gilding the Lily | Oct-08-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 24 – Stretch Up Tall | Oct-01-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 23 – In Search of Konrad Lorenz | Sep-24-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 22 – A Scientist Looks at Religion | Aug-09-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 21 – How Does It Hurt? | Jul-05-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 20 – The Rat Man | Jun-28-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 19 – The Telly of Tomorrow | Jun-21-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 18 – Do We Really Need the Railways? | Jun-14-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 17 – The Laws of the Land | Jun-07-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 16 – What a Waste! | May-24-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 15 – Do You Remember the Memory Man? | May-17-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 14 – Airport | May-03-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 13 – Lumbered With Back-Ache! | Apr-26-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 12 – Red Sea Coral and the Crown of Thorns | Apr-12-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 11 – Survival of the Weakest | Apr-05-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 10 – What Time is Your Body? | Mar-22-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 9 – Acupuncture: A Chinese Puzzle | Mar-08-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 8 – …And Where Will the Children Play? | Mar-01-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 7 – Science is Dead, Long Live Science | Feb-15-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 6 – When the Breeding Has to Stop | Feb-08-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 5 – Crime Lab | Feb-01-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 4 – The Curtain of Silence | Jan-25-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 3 – The Military Necessity | Jan-18-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 2 – Worlds in Collision | Jan-11-1973 | | 0 | 2 years |
| Horizon Season 1973 Episode 1 – Epidemic | Jan-04-1973 | | 0 | 2 years |
1972 | Horizon Season 1972 Episode 33 – Navigating Europe | Dec-28-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 32 – Their Life in Your Hands | Dec-21-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 31 – Alaskan Pipe Dream | Dec-07-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 30 – Fire | Nov-30-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 29 – The Making of a Natural History Film | Nov-23-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 28 – Do You Sincerely Want a Long Life? | Nov-16-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 27 – Billion Marsh | Nov-09-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 26 – Shadows of Bliss | Nov-02-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 25 – The Making of the English Landscape | Oct-26-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 24 – When Polar Bears Swam in the Thames | Oct-19-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 23 – Hospital, 1922 | Oct-12-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 22 – The Surgery of Violence | Jul-31-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 21 – Sex Can Be a Problem | Jul-24-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 20 – The Life that Lives on Man | Jul-10-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 19 – The Way We Move | Jul-03-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 18 – Sorry I Opened My Mouth | Jun-12-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 17 – Do You Dig National Parks? | May-22-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 16 – Rail Crash | May-08-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 15 – The Wizard Who Spat on the Floor | May-01-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 14 – Out of Volcanoes | Apr-17-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 13 – Mind Over Body | Apr-10-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 12 – Survival in the Sahara | Mar-27-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 11 – Man-Made Lakes in Africa | Mar-20-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 10 – What is Race? | Mar-13-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 9 – Whales, Dolphins and Men | Mar-06-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 8 – For Love or Money | Feb-28-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 7 – How They Sold Doomsday | Feb-21-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 6 – Are You Doing This for Me, Doctor? | Feb-14-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 5 – The Day it Rained Periwinkles | Feb-07-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 4 – Parasite of Paradise | Jan-31-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 3 – How Much Do You Smell? | Jan-17-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 2 – Navajo – The Last Red Indians | Jan-10-1972 | | 0 | 2 years |
| Horizon Season 1972 Episode 1 – The Missing Link | Jan-03-1972 | | 0 | 2 years |
1971 | Horizon Season 1971 Episode 32 – Patently Absurd | Dec-27-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 31 – Periscope War | Dec-20-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 30 – Willingly to School | Dec-06-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 29 – Can Venice Survive? | Nov-29-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 28 – The Crab Nebula | Nov-22-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 27 – The Men Who Painted Caves | Nov-15-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 26 – The Fierce People | Nov-01-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 25 – Rutherford, Cavendish | Oct-25-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 24 – One Liverpool or Two? | Oct-18-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 23 – If at First You Don’t Succeed…You Don’t Succeed | Oct-11-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 22 – Rheumatism | Oct-04-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 21 – Your Country Needs You | Sep-27-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 20 – The Dinosaur Hunters | Jun-21-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 19 – The Total War Machine | Jun-14-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 18 – A Case of Depression | Jun-07-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 17 – Looking for a Happy Landing | May-31-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 16 – Tastes of Food to Come | May-24-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 15 – What Every Girl Should Know | May-17-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 14 – The Secret | May-10-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 13 – Darwin’s Bulldog | May-03-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 12 – Three Score Years and Then? | Apr-26-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 11 – The Measure of a Man | Apr-12-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 10 – The Wood | Apr-05-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 9 – Nice Sort of Accident to Have | Mar-22-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 8 – What Kind of Doctor? | Mar-15-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 7 – Due to a Lack of Interest, Tomorrow Has Been Canceled | Mar-08-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 6 – Kuru – To Tremble With Fear | Feb-22-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 5 – I’m Dependent – You’re Addicted | Feb-15-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 4 – Rumors of War | Feb-01-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 3 – A Bulldozer Through Heaven | Jan-25-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 2 – Great Ormond Street | Jan-18-1971 | | 0 | 2 years |
| Horizon Season 1971 Episode 1 – Wildlife – The Last Great Battle | Jan-04-1971 | | 0 | 2 years |
1970 | Horizon Season 1970 Episode 37 – The Gargantuan Triumph of Science | Dec-28-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 36 – The Man who Talks to Frogs | Dec-21-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 35 – The City that Waits to Die | Dec-14-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 34 – Square Pegs | Dec-07-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 33 – Mind the Machine | Nov-30-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 32 – Tanks | Nov-23-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 31 – The Savage Mind | Nov-16-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 30 – The Insect War | Nov-09-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 29 – Million Ton Tanker | Nov-02-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 28 – Something for Our Children | Oct-12-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 27 – Child for a Lifetime | Oct-05-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 26 – All Creatures Great and Small | Sep-28-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 25 – Water, Water | Sep-21-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 24 – Virus | Sep-14-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 23 – Noah’s Ark in Kensington | Sep-07-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 22 – Crown of Thorns | Aug-31-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 21 – Don’t Get Sick in America | Aug-24-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 20 – The Manhunters | Aug-17-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 19 – A Measure of Uncertainty | Aug-10-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 18 – Wolves and Wolfmen | Jul-13-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 17 – Only Skin Deep | Jul-06-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 16 – One Man’s Meat | May-11-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 15 – The Fretful Elements | Apr-27-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 14 – A Case of Priority | Apr-20-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 13 – The Drifting of the Continents | Apr-13-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 12 – In the Beginning was the Word | Mar-30-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 11 – The World Outside | Mar-23-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 10 – Let the Therapy Fit the Crime | Mar-16-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 9 – After the Iron Age | Mar-09-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 8 – The Expert Witness | Mar-02-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 7 – A Much Wanted Child | Feb-23-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 6 – Whose Coast? | Feb-16-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 5 – Sex and Sexuality | Feb-02-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 4 – A Disease of Our Time – Heart Attacks | Jan-26-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 3 – A Disease of Our Time – Stress | Jan-19-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 2 – Henry Royce, Mechanic | Jan-12-1970 | | 0 | 2 years |
| Horizon Season 1970 Episode 1 – Just Another World | Jan-05-1970 | | 0 | 2 years |
1969 | Horizon Season 1969 Episode 36 – For the Safety of Mankind | Dec-29-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 35 – Bread | Dec-22-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 34 – A Game of War | Dec-15-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 33 – How Much Do You Drink? | Dec-08-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 32 – Don’t Cackle, Lay Eggs | Dec-01-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 31 – Fit to Live | Nov-24-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 30 – There’s a Rhino in My Sugar | Nov-17-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 29 – Cancer Now | Nov-10-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 28 – Snap, Crackle and Bang | Nov-03-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 27 – C.E.R.N. | Oct-27-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 26 – Master of the Microscope | Oct-20-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 25 – Father of the Man | Oct-13-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 24 – Four Fast Legs and a Nose | Oct-06-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 23 – The Problem of Pain | Sep-29-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 22 – Science on Safari | Sep-15-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 21 – Machines and People | Jun-05-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 20 – Discovery | May-29-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 19 – After Apollo | May-22-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 18 – Technology and Self-Determination | May-15-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 17 – Shark | May-01-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 16 – Muck Today, Poison Tomorrow | Apr-24-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 15 – King Solomon’s Garden | Apr-10-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 14 – The Unborn Patient | Mar-27-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 13 – The View from Space | Mar-20-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 12 – Powers of Persuasion | Mar-13-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 11 – The Drift from Science | Mar-06-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 10 – Extra Sensory Perception | Feb-27-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 9 – A True Madness | Feb-22-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 8 – Report on V.D. | Feb-20-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 7 – Music and the Mind | Feb-13-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 6 – The Last of the Polymaths | Feb-06-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 5 – The Gifted Child | Jan-30-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 4 – The Years of the Locust | Jan-23-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 3 – The Miraculous Wonder: The Human Eye | Jan-16-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 2 – If Only They Could Speak | Jan-09-1969 | | 0 | 2 years |
| Horizon Season 1969 Episode 1 – Inside Every Fat Man | Jan-02-1969 | | 0 | 2 years |
1968 | Horizon Season 1968 Episode 23 – Phantasmagoria: The Magic Lantern | Dec-24-1968 | | 0 | 2 years |
| Horizon Season 1968 Episode 22 – The Talgai Skull | Dec-19-1968 | | 0 | 2 years |
| Horizon Season 1968 Episode 21 – Hidden World | Dec-12-1968 | | 0 | 2 years |
| Horizon Season 1968 Episode 20 – Black Man, White Science | Dec-05-1968 | | 0 | 2 years |
| Horizon Season 1968 Episode 19 – Wheels Within Wheels | Nov-28-1968 | | 0 | 2 years |
| Horizon Season 1968 Episode 18 – In the Matter of Dr. Alfred Nobel | Nov-21-1968 | | 0 | 2 years |
| Horizon Season 1968 Episode 17 – The Doctor’s Dilemma | Nov-14-1968 | | 0 | 2 years |
| Horizon Season 1968 Episode 16 – Computer Revolution | Nov-07-1968 | | 0 | 2 years |
| Horizon Season 1968 Episode 15 – Children Without Words | Oct-31-1968 | | 0 | 2 years |
| Horizon Season 1968 Episode 14 – The Broken Bridge | Oct-24-1968 | | 0 | 2 years |
| Horizon Season 1968 Episode 13 – African Medicine | Oct-17-1968 | | 0 | 2 years |
| Horizon Season 1968 Episode 12 – Experiments in War | Oct-03-1968 | | 0 | 2 years |
| Horizon Season 1968 Episode 11 – Comfort on Aging | Sep-26-1968 | | 0 | 2 years |
| Horizon Season 1968 Episode 10 – From Field to Factory | Sep-19-1968 | | 0 | 2 years |
| Horizon Season 1968 Episode 9 – The Lindemann Enigma | Sep-12-1968 | | 0 | 2 years |
| Horizon Season 1968 Episode 8 – The Equation of Murder | May-07-1968 | | 0 | 2 years |
| Horizon Season 1968 Episode 7 – Investigating Murder | Apr-09-1968 | | 0 | 2 years |
| Horizon Season 1968 Episode 6 – Man in Search of Himself | Mar-26-1968 | | 0 | 2 years |
| Horizon Season 1968 Episode 5 – The Man Makers | Mar-12-1968 | | 0 | 2 years |
| Horizon Season 1968 Episode 4 – Towns, Traffic and Tomorrow | Feb-27-1968 | | 0 | 2 years |
| Horizon Season 1968 Episode 3 – Once a Junkie | Feb-13-1968 | | 0 | 2 years |
| Horizon Season 1968 Episode 2 – Man’s Best Friend | Jan-30-1968 | | 0 | 2 years |
| Horizon Season 1968 Episode 1 – An Ingenious Man – Sir H. John Baker | Jan-02-1968 | | 0 | 2 years |
1967 | Horizon Season 1967 Episode 20 – Professor in Toyland | Dec-24-1967 | | 0 | 2 years |
| Horizon Season 1967 Episode 19 – The World of Ted Serios | Dec-12-1967 | | 0 | 2 years |
| Horizon Season 1967 Episode 18 – Koestler on Creativity | Dec-05-1967 | | 0 | 2 years |
| Horizon Season 1967 Episode 17 – The Life and Death of the Pine Processionary | Nov-21-1967 | | 0 | 2 years |
| Horizon Season 1967 Episode 16 – Air Safety – The Unknown Factor | Nov-07-1967 | | 0 | 2 years |
| Horizon Season 1967 Episode 15 – Will Art Last? | Oct-24-1967 | | 0 | 2 years |
| Horizon Season 1967 Episode 14 – Lords of the Sea | Oct-10-1967 | | 0 | 2 years |
| Horizon Season 1967 Episode 13 – Aspects of Alcohol | Sep-26-1967 | | 0 | 2 years |
| Horizon Season 1967 Episode 12 – The War of the Boffins | Sep-12-1967 | | 0 | 2 years |
| Horizon Season 1967 Episode 11 – Hypnosis | Jul-18-1967 | | 0 | 2 years |
| Horizon Season 1967 Episode 10 – Science and the Supernatural | Jul-04-1967 | | 0 | 2 years |
| Horizon Season 1967 Episode 9 – Cancer – The Smoker’s Gamble | Jun-20-1967 | | 0 | 2 years |
| Horizon Season 1967 Episode 8 – Masters of the Desert | May-23-1967 | | 0 | 2 years |
| Horizon Season 1967 Episode 7 – Memory | May-09-1967 | | 0 | 2 years |
| Horizon Season 1967 Episode 6 – The Shape of War to Come | Apr-25-1967 | | 0 | 2 years |
| Horizon Season 1967 Episode 5 – How Safe is Surgery? | Mar-28-1967 | | 0 | 2 years |
| Horizon Season 1967 Episode 4 – Migraine | Mar-14-1967 | | 0 | 2 years |
| Horizon Season 1967 Episode 3 – Dynamo – The Life of Michael Faraday | Feb-28-1967 | | 0 | 2 years |
| Horizon Season 1967 Episode 2 – How Best to Make a Man, How Best to Make a Scientist | Feb-17-1967 | | 0 | 2 years |
| Horizon Season 1967 Episode 1 – Sons of Cain | Jan-17-1967 | | 0 | 2 years |
1966 | Horizon Season 1966 Episode 24 – Hand Me My Sword, Humphrey | Dec-25-1966 | | 0 | 2 years |
| Horizon Season 1966 Episode 23 – The Structure of Life | Dec-05-1966 | | 0 | 2 years |
| Horizon Season 1966 Episode 22 – Sex-Change? | Nov-21-1966 | | 0 | 2 years |
| Horizon Season 1966 Episode 21 – From Peenemünde to the Moon | Nov-07-1966 | | 0 | 2 years |
| Horizon Season 1966 Episode 20 – The Athlete | Oct-24-1966 | | 0 | 2 years |
| Horizon Season 1966 Episode 19 – Ten Years in the Antarctic | Oct-10-1966 | | 0 | 2 years |
| Horizon Season 1966 Episode 18 – M.I.T’s ABC | Sep-25-1966 | | 0 | 2 years |
| Horizon Season 1966 Episode 17 – The Dolphins that Joined the Navy | Sep-11-1966 | | 0 | 2 years |
| Horizon Season 1966 Episode 16 – Man of Science | Jul-31-1966 | | 0 | 2 years |
| Horizon Season 1966 Episode 15 – The Lonely Children | Jul-17-1966 | | 0 | 2 years |
| Horizon Season 1966 Episode 14 – Genes in Action | Jul-03-1966 | | 0 | 2 years |
| Horizon Season 1966 Episode 13 – Where Must the Money Go? | Jun-19-1966 | | 0 | 2 years |
| Horizon Season 1966 Episode 12 – Man Meets Duck | Jun-05-1966 | | 0 | 2 years |
| Horizon Season 1966 Episode 11 – Destination Mars | May-22-1966 | | 0 | 2 years |
| Horizon Season 1966 Episode 10 – Man in Space | May-08-1966 | | 0 | 2 years |
| Horizon Season 1966 Episode 9 – Towers of Ilium | Apr-24-1966 | | 0 | 2 years |
| Horizon Season 1966 Episode 8 – Chance and Decay | Apr-10-1966 | | 0 | 2 years |
| Horizon Season 1966 Episode 7 – So You Want to be an Inventor? | Mar-27-1966 | | 0 | 2 years |
| Horizon Season 1966 Episode 6 – The Beginning of Life | Mar-13-1966 | | 0 | 2 years |
| Horizon Season 1966 Episode 5 – Route 128 | Feb-27-1966 | | 0 | 2 years |
| Horizon Season 1966 Episode 4 – A Theory of the Earth | Feb-13-1966 | | 0 | 2 years |
| Horizon Season 1966 Episode 3 – A Man of Two Visions | Jan-30-1966 | | 0 | 2 years |
| Horizon Season 1966 Episode 2 – The Troubled Mind | Jan-16-1966 | | 0 | 2 years |
| Horizon Season 1966 Episode 1 – Windows of the Soul | Jan-02-1966 | | 0 | 2 years |
1965 | Horizon Season 1965 Episode 24 – Boys on Bubbles | Dec-19-1965 | | 0 | 2 years |
| Horizon Season 1965 Episode 23 – The Big Dishes and the Living Stream | Dec-05-1965 | | 0 | 2 years |
| Horizon Season 1965 Episode 22 – Toil, Sweat & Tears | Nov-21-1965 | | 0 | 2 years |
| Horizon Season 1965 Episode 21 – 10,000 Tombs | Nov-07-1965 | | 0 | 2 years |
| Horizon Season 1965 Episode 20 – An Affair of the Heart | Oct-24-1965 | | 0 | 2 years |
| Horizon Season 1965 Episode 19 – Special Senses | Oct-10-1965 | | 0 | 2 years |
| Horizon Season 1965 Episode 18 – Let Newton Be | Sep-22-1965 | | 0 | 2 years |
| Horizon Season 1965 Episode 17 – Fuel for the Future | Sep-08-1965 | | 0 | 2 years |
| Horizon Season 1965 Episode 16 – Time Stood Still | Aug-25-1965 | | 0 | 2 years |
| Horizon Season 1965 Episode 15 – Certain of Uncertainty | Aug-11-1965 | | 0 | 2 years |
| Horizon Season 1965 Episode 14 – Science Fiction: Science Fact? | Jul-28-1965 | | 0 | 2 years |
| Horizon Season 1965 Episode 13 – Dr. Joseph Needham | Jul-14-1965 | | 0 | 2 years |
| Horizon Season 1965 Episode 12 – The Sudden Light | Jun-23-1965 | | 0 | 2 years |
| Horizon Season 1965 Episode 11 – Men and Sharks | Jun-09-1965 | | 0 | 2 years |
| Horizon Season 1965 Episode 10 – The Long Slide | May-26-1965 | | 0 | 2 years |
| Horizon Season 1965 Episode 9 – The Big Smoke | May-12-1965 | | 0 | 2 years |
| Horizon Season 1965 Episode 8 – Other Side of the Pill | Apr-14-1965 | | 0 | 2 years |
| Horizon Season 1965 Episode 7 – Restless Genius | Mar-31-1965 | | 0 | 2 years |
| Horizon Season 1965 Episode 6 – Faster, Farther, Higher | Mar-17-1965 | | 0 | 2 years |
| Horizon Season 1965 Episode 5 – The Great Computer Scandal | Mar-03-1965 | | 0 | 2 years |
| Horizon Season 1965 Episode 4 – Science and Art | Feb-17-1965 | | 0 | 2 years |
| Horizon Season 1965 Episode 3 – Star Gazers | Feb-03-1965 | | 0 | 2 years |
| Horizon Season 1965 Episode 2 – The Technique of Change | Jan-20-1965 | | 0 | 2 years |
| Horizon Season 1965 Episode 1 – Learning from Machines | Jan-06-1965 | | 0 | 2 years |
1964 | Horizon Season 1964 Episode 10 – Science, Toys and Magic | Dec-14-1964 | | 0 | 2 years |
| Horizon Season 1964 Episode 9 – Professor J.B.S. Haldane, Obituary | Dec-01-1964 | | 0 | 2 years |
| Horizon Season 1964 Episode 8 – Tots and Quods and Woodgeries | Nov-16-1964 | | 0 | 2 years |
| Horizon Season 1964 Episode 7 – The Amateur Scientist | Oct-19-1964 | | 0 | 2 years |
| Horizon Season 1964 Episode 6 – The Knowledge Explosion | Sep-21-1964 | | 0 | 2 years |
| Horizon Season 1964 Episode 5 – The Air of Science | Aug-22-1964 | | 0 | 2 years |
| Horizon Season 1964 Episode 4 – Strangeness Minus Three | Jul-25-1964 | | 0 | 2 years |
| Horizon Season 1964 Episode 3 – A Candle to Nature | Jun-27-1964 | | 0 | 2 years |
| Horizon Season 1964 Episode 2 – Pesticides and Posterity | May-30-1964 | | 0 | 2 years |
| Horizon Season 1964 Episode 1 – The World of Buckminster Fuller | Feb-05-1964 | | 0 | 2 years |
52 | Horizon Season 52 Episode 17 – Dinosaurs – The Hunt for Life | Aug-26-2013 | | 0 | 5 years |
| Horizon Season 52 Episode 16 – Defeating the Hackers | Aug-19-2013 | | 0 | 6 years |
| Horizon Season 52 Episode 15 – Monitor Me | Aug-12-2013 | | 0 | 6 years |
| Horizon Season 52 Episode 14 – What’s Killing Our Bees | Aug-02-2013 | | 0 | 6 years |
| Horizon Season 52 Episode 13 – The Truth About Personality | Jul-10-2013 | | 0 | 6 years |
| Horizon Season 52 Episode 12 – What Makes Us Human? | Jul-03-2013 | | 0 | 6 years |
| Horizon Season 52 Episode 11 – Swallowed by a Black Hole | Jun-26-2013 | | 0 | 6 years |
| Horizon Season 52 Episode 10 – Fracking – The New Energy Rush | Jun-19-2013 | | 0 | 6 years |
| Horizon Season 52 Episode 9 – Little Cat Diaries | Jun-14-2013 | | 0 | 6 years |
| Horizon Season 52 Episode 8 – The Secret Life of the Cat | Jun-13-2013 | | 0 | 6 years |
| Horizon Season 52 Episode 7 – Tomorrow’s World | Apr-11-2013 | | 1 | 6 years |
| Horizon Season 52 Episode 6 – The Age of Big Data | Apr-04-2013 | | 0 | 6 years |
| Horizon Season 52 Episode 5 – Mend Me: A Horizon Guide to Transplants | Mar-27-2013 | | 0 | 6 years |
| Horizon Season 52 Episode 4 – The Truth about Taste | Mar-28-2013 | | 0 | 6 years |
| Horizon Season 52 Episode 3 – Mend Me: A Horizon Guide to Transplants | Mar-27-2013 | | 0 | 6 years |
| Horizon Season 52 Episode 2 – How to Avoid Mistakes in Surgery | Mar-21-2013 | | 3 | 6 years |
| Horizon Season 52 Episode 1 – The Creative Brain: How Insight Works | Mar-14-2013 | | 0 | 6 years |
51 | Horizon Season 51 Episode 6 – Antibiotics | Sep-10-2012 | | 0 | 6 years |
| Horizon Season 51 Episode 5 – How Small Is the Universe? | Sep-03-2012 | | 0 | 6 years |
| Horizon Season 51 Episode 4 – How Big Is the Universe? | Aug-27-2012 | | 0 | 6 years |
| Horizon Season 51 Episode 3 – Eat, Fast and Live Longer | Aug-06-2012 | | 1 | 7 years |
| Horizon Season 51 Episode 2 – Curiosity | Jul-30-2012 | | 2 | 7 years |
| Horizon Season 51 Episode 1 – The Truth About Looking Younger | Jul-24-2012 | | 2 | 7 years |
50 | Horizon Season 50 Episode 14 – Beating Cancer | Apr-10-2012 | | 0 | 7 years |
| Horizon Season 50 Episode 13 – The Hunt for AI | Apr-03-2012 | | 0 | 7 years |
| Horizon Season 50 Episode 12 – Global Weirding | Mar-27-2012 | | 0 | 7 years |
| Horizon Season 50 Episode 11 – The Truth about Fat | Mar-20-2012 | | 0 | 7 years |
| Horizon Season 50 Episode 10 – Out of Control? | Mar-13-2012 | | 0 | 7 years |
| Horizon Season 50 Episode 9 – Solar Storms – The Threat to Planet Earth | Mar-06-2012 | | 0 | 7 years |
| Horizon Season 50 Episode 8 – The Truth About Exercise | Feb-28-2012 | | 0 | 7 years |
| Horizon Season 50 Episode 7 – Playing God | Jan-17-2012 | | 0 | 7 years |
| Horizon Season 50 Episode 6 – Fukushima: Is Nuclear Power Safe? | Sep-14-2011 | | 0 | 7 years |
| Horizon Season 50 Episode 5 – Are You Good or Evil? | Sep-07-2011 | | 0 | 7 years |
| Horizon Season 50 Episode 4 – The Core | Aug-31-2011 | | 0 | 7 years |
| Horizon Season 50 Episode 3 – The Nine Months that Made You | Aug-22-2011 | | 0 | 7 years |
| Horizon Season 50 Episode 2 – Stars & Telescopes | Aug-15-2011 | | 0 | 7 years |
| Horizon Season 50 Episode 1 – Do You See What I See? | Aug-08-2011 | | 0 | 7 years |
0 | Horizon Season 0 Episode 93 – The Horizon Guide to AI | Sep-04-2018 | | 0 | 5 months |
| Horizon Season 0 Episode 92 – Jimmy Carr and the Science of Laughter | Sep-11-2016 | | 0 | 7 months |
| Horizon Season 0 Episode 91 – Tim Peake: How to be an Astronaut | Dec-13-2015 | | 0 | 7 months |
| Horizon Season 0 Episode 90 – The Mystery of Murder: A Horizon Guide | Mar-09-2015 | | 0 | 7 months |
| Horizon Season 0 Episode 89 – Climate Change: A Horizon Guide | Mar-04-2015 | | 0 | 7 months |
| Horizon Season 0 Episode 88 – What’s The Right Diet For You?: Part 3 | Jan-14-2015 | | 0 | 7 months |
| Horizon Season 0 Episode 87 – What’s The Right Diet For You?: Part 2 | Jan-13-2015 | | 0 | 7 months |
| Horizon Season 0 Episode 86 – What’s The Right Diet For You?: Part 1 | Jan-12-2015 | | 0 | 7 months |
| Horizon Season 0 Episode 85 – Cat Watch 2014 – Cat Talk | Oct-09-2014 | | 0 | 7 months |
| Horizon Season 0 Episode 84 – Cat Watch 2014 – The Lion in Your Lap | Oct-08-2014 | | 0 | 7 months |
| Horizon Season 0 Episode 83 – Cat Watch 2014 – A Cat’s Eye View | Oct-07-2014 | | 0 | 7 months |
| Horizon Season 0 Episode 82 – Comet of the Century: A Horizon Special | Nov-23-2013 | | 0 | 7 months |
| Horizon Season 0 Episode 81 – Impact! A Horizon Guide to Car Crashes | Oct-21-2013 | | 0 | 7 months |
| Horizon Season 0 Episode 80 – Impact! A Horizon Guide to Plane Crashes | Oct-14-2013 | | 0 | 7 months |
| Horizon Season 0 Episode 79 – Sex: A Horizon Guide | Sep-11-2013 | | 0 | 7 months |
| Horizon Season 0 Episode 78 – What’s Killing Our Bees? A Horizon Special | Aug-02-2013 | | 0 | 7 months |
| Horizon Season 0 Episode 77 – Molecules With Sunglasses (Update) | Dec-09-1996 | | 0 | 7 months |
| Horizon Season 0 Episode 76 – The Life and Times of El Niño | Jan-03-2006 | | 0 | 7 months |
| Horizon Season 0 Episode 75 – Darwin: The Legacy | Mar-29-1998 | | 0 | 7 months |
| Horizon Season 0 Episode 74 – Inside the Internet | Jun-10-2000 | | 0 | 7 months |
| Horizon Season 0 Episode 73 – Computers Don’t Bite, Inside the Internet | May-17-1997 | | 0 | 7 months |
| Horizon Season 0 Episode 72 – Mend Me: A Horizon Guide to Transplants | Mar-27-2013 | | 0 | 7 months |
| Horizon Season 0 Episode 71 – The Truth About Meteors | Mar-03-2013 | | 0 | 7 months |
| Horizon Season 0 Episode 70 – Tomorrow’s World | Apr-11-2013 | | 0 | 7 months |
| Horizon Season 0 Episode 69 – The Final Frontier? A Horizon Guide to the Universe | Oct-17-2012 | | 0 | 7 months |
| Horizon Season 0 Episode 68 – Mission to Mars | Jul-30-2012 | | 0 | 7 months |
| Horizon Season 0 Episode 67 – Immortal? A Horizon Guide to Ageing | Jul-17-2012 | | 0 | 7 months |
| Horizon Season 0 Episode 66 – Blink: A Horizon Guide to the Senses | Jul-11-2012 | | 0 | 7 months |
| Horizon Season 0 Episode 65 – The Transit of Venus: A Horizon Special | Jun-05-2012 | | 0 | 7 months |
| Horizon Season 0 Episode 64 – Stuff: A Horizon Guide to Materials | Apr-19-2012 | | 0 | 7 months |
| Horizon Season 0 Episode 63 – The Hunt for AI | Apr-03-2012 | | 0 | 7 months |
| Horizon Season 0 Episode 62 – Woof! A Horizon Guide to Dogs | Mar-01-2012 | | 0 | 7 months |
| Horizon Season 0 Episode 61 – The Hunt for Higgs: A Horizon Special | Jan-09-2012 | | 0 | 7 months |
| Horizon Season 0 Episode 60 – Extinct: A Horizon Guide to Dinosaurs | Sep-21-2011 | | 0 | 7 months |
| Horizon Season 0 Episode 59 – Carrot or Stick? A Horizon Guide to Raising Kids | Aug-11-2011 | | 0 | 7 months |
| Horizon Season 0 Episode 58 – 40 Years On The Moon | Jul-09-2009 | | 0 | 7 months |
| Horizon Season 0 Episode 57 – The End of the World? A Horizon Guide to Armageddon | May-12-2011 | | 0 | 7 months |
| Horizon Season 0 Episode 56 – The Space Shuttle: A Horizon Guide | Apr-10-2011 | | 0 | 7 months |
| Horizon Season 0 Episode 55 – Japan Earthquake: A Horizon Special | Mar-27-2011 | | 0 | 7 months |
| Horizon Season 0 Episode 54 – What Makes Us Clever? A Horizon Guide to Intelligence | Jan-06-2011 | | 0 | 7 months |
| Horizon Season 0 Episode 53 – The End of God? A Horizon Guide to Science and Religion | Sep-17-2010 | | 0 | 7 months |
| Horizon Season 0 Episode 52 – Diet: A Horizon Guide | Jan-07-2010 | | 0 | 7 months |
| Horizon Season 0 Episode 50 – Lost Horizons: The Big Bang | Sep-04-2008 | | 0 | 7 months |
| Horizon Season 0 Episode 49 – How Many People Can Live on Planet Earth? | Dec-09-2009 | | 0 | 7 months |
| Horizon Season 0 Episode 48 – Mars: A Horizon Guide | Nov-15-2009 | | 0 | 7 months |
| Horizon Season 0 Episode 47 – The Horizon Guide to Pandemic | Aug-09-2009 | | 0 | 7 months |
| Horizon Season 0 Episode 46 – Everest: Doctors in the Death Zone (2) | Sep-30-2007 | | 0 | 7 months |
| Horizon Season 0 Episode 45 – Everest: Doctors in the Death Zone (1) | Sep-23-2007 | | 0 | 7 months |
| Horizon Season 0 Episode 44 – First Olympian | Jul-23-2004 | | 0 | 7 months |
| Horizon Season 0 Episode 43 – What Sank the Kursk? | Aug-08-2001 | | 0 | 7 months |
| Horizon Season 0 Episode 42 – Destination Mars | Jan-18-2001 | | 0 | 7 months |
| Horizon Season 0 Episode 41 – Life on Mars | Jan-11-2001 | | 0 | 7 months |
| Horizon Season 0 Episode 40 – Life and Death in the 21st Century: Designer Babies | Jan-06-2000 | | 0 | 7 months |
| Horizon Season 0 Episode 39 – Life and Death in the 21st Century: Future Plagues | Jan-05-2000 | | 0 | 7 months |
| Horizon Season 0 Episode 38 – Life and Death in the 21st Century: Living Forever | Jan-04-2000 | | 0 | 7 months |
| Horizon Season 0 Episode 37 – Atlantis Reborn | Nov-04-1999 | | 0 | 7 months |
| Horizon Season 0 Episode 36 – Atlantis Uncovered | Oct-28-1999 | | 0 | 7 months |
| Horizon Season 0 Episode 35 – Fat Files: Living on Air | Jan-21-1999 | | 0 | 7 months |
| Horizon Season 0 Episode 34 – Fat Files: Fixing Fat | Jan-14-1999 | | 0 | 7 months |
| Horizon Season 0 Episode 33 – Fat Files: Born to Be Fat | Jan-07-1999 | | 0 | 7 months |
| Horizon Season 0 Episode 32 – Longitude | Jan-04-1999 | | 0 | 7 months |
| Horizon Season 0 Episode 31 – Crash | Jan-08-1998 | | 0 | 7 months |
| Horizon Season 0 Episode 30 – Antarctica: The Ice Melts | Nov-13-1997 | | 0 | 7 months |
| Horizon Season 0 Episode 29 – Antarctica: The Ice Forms | Nov-06-1997 | | 0 | 7 months |
| Horizon Season 0 Episode 28 – Antarctica: The Ice Lives | Oct-30-1997 | | 0 | 7 months |
| Horizon Season 0 Episode 27 – Ice Mummies: Frozen in Heaven | Feb-13-1997 | | 0 | 7 months |
| Horizon Season 0 Episode 26 – Ice Mummies: A Life in Ice | Feb-06-1997 | | 0 | 7 months |
| Horizon Season 0 Episode 25 – Ice Mummies: The Ice Maiden | Jan-30-1997 | | 0 | 7 months |
| Horizon Season 0 Episode 24 – BSE: The Human Experiment | Nov-18-1996 | | 0 | 7 months |
| Horizon Season 0 Episode 23 – BSE: The Invisible Enemy | Nov-17-1996 | | 0 | 7 months |
| Horizon Season 0 Episode 22 – Einstein: Fame | Mar-18-1996 | | 0 | 7 months |
| Horizon Season 0 Episode 21 – Einstein: The Miracle Year | Mar-17-1996 | | 0 | 7 months |
| Horizon Season 0 Episode 20 – Twice Born | Feb-14-1995 | | 0 | 7 months |
| Horizon Season 0 Episode 19 – 30th Anniversary – The Far Side | May-23-1994 | | 0 | 7 months |
| Horizon Season 0 Episode 18 – Assault on the Male | Oct-31-1993 | | 0 | 7 months |
| Horizon Season 0 Episode 17 – The Truth About Sex | Oct-12-1992 | | 0 | 7 months |
| Horizon Season 0 Episode 16 – Hide and Seek in Iraq | Aug-23-1992 | | 0 | 7 months |
| Horizon Season 0 Episode 15 – A Close Encounter of the Second Kind | Jul-10-1992 | | 0 | 7 months |
| Horizon Season 0 Episode 14 – Red Star in Orbit: The Mission | Dec-21-1990 | | 0 | 7 months |
| Horizon Season 0 Episode 13 – Red Star in Orbit: The Dark Side of the Moon | Dec-14-1990 | | 0 | 7 months |
| Horizon Season 0 Episode 12 – Red Star in Orbit: The Invisible Spaceman | Dec-07-1990 | | 0 | 7 months |
| Horizon Season 0 Episode 11 – Making an Honest Fiver | Jun-06-1990 | | 0 | 7 months |
| Horizon Season 0 Episode 10 – The Diary of Discovery | Sep-28-1988 | | 0 | 7 months |
| Horizon Season 0 Episode 9 – Halley’s Comet – The Encounter | Mar-13-1986 | | 0 | 7 months |
| Horizon Season 0 Episode 8 – Halley’s Comet – The Apparition | Nov-25-1985 | | 0 | 7 months |
| Horizon Season 0 Episode 7 – Twenty-First Birthday | May-20-1985 | | 0 | 7 months |
| Horizon Season 0 Episode 6 – Biology at War: A Plague in the Wind | Oct-29-1984 | | 0 | 7 months |
| Horizon Season 0 Episode 5 – Beyond the Moon | Jul-21-1984 | | 0 | 7 months |
| Horizon Season 0 Episode 4 – Biology at War: The Mystery of Yellow Rain | May-15-1984 | | 0 | 7 months |
| Horizon Season 0 Episode 3 – 25 Years in Space | Dec-25-1982 | | 0 | 7 months |
| Horizon Season 0 Episode 2 – The Mind’s Eye | Jan-28-1980 | | 0 | 7 months |
| Horizon Season 0 Episode 1 – The Case of the Ancient Astronauts | Nov-25-1977 | | 0 | 7 months |