| 1971 | Horizon Season 1971 Episode 32 – Patently Absurd | | 0 | 10 years |
| Horizon Season 1971 Episode 31 – Periscope War | | 0 | 10 years |
| Horizon Season 1971 Episode 30 – Willingly to School | | 0 | 10 years |
| Horizon Season 1971 Episode 29 – Can Venice Survive? | | 0 | 10 years |
| Horizon Season 1971 Episode 28 – The Crab Nebula | | 0 | 10 years |
| Horizon Season 1971 Episode 27 – The Men Who Painted Caves | | 0 | 10 years |
| Horizon Season 1971 Episode 26 – The Fierce People | | 0 | 10 years |
| Horizon Season 1971 Episode 25 – Rutherford, Cavendish | | 0 | 10 years |
| Horizon Season 1971 Episode 24 – One Liverpool or Two? | | 0 | 10 years |
| Horizon Season 1971 Episode 23 – If at First You Don’t Succeed…You Don’t Succeed | | 0 | 10 years |
| Horizon Season 1971 Episode 22 – Rheumatism | | 0 | 10 years |
| Horizon Season 1971 Episode 21 – Your Country Needs You | | 0 | 10 years |
| Horizon Season 1971 Episode 20 – The Dinosaur Hunters | | 0 | 10 years |
| Horizon Season 1971 Episode 19 – The Total War Machine | | 0 | 10 years |
| Horizon Season 1971 Episode 18 – A Case of Depression | | 0 | 10 years |
| Horizon Season 1971 Episode 17 – Looking for a Happy Landing | | 0 | 10 years |
| Horizon Season 1971 Episode 16 – Tastes of Food to Come | | 0 | 10 years |
| Horizon Season 1971 Episode 15 – What Every Girl Should Know | | 0 | 10 years |
| Horizon Season 1971 Episode 14 – The Secret | | 0 | 10 years |
| Horizon Season 1971 Episode 13 – Darwin’s Bulldog | | 0 | 10 years |
| Horizon Season 1971 Episode 12 – Three Score Years and Then? | | 0 | 10 years |
| Horizon Season 1971 Episode 11 – The Measure of a Man | | 0 | 10 years |
| Horizon Season 1971 Episode 10 – The Wood | | 0 | 10 years |
| Horizon Season 1971 Episode 9 – Nice Sort of Accident to Have | | 0 | 10 years |
| Horizon Season 1971 Episode 8 – What Kind of Doctor? | | 0 | 10 years |
| Horizon Season 1971 Episode 7 – Due to a Lack of Interest, Tomorrow Has Been Canceled | | 0 | 10 years |
| Horizon Season 1971 Episode 6 – Kuru – To Tremble With Fear | | 0 | 10 years |
| Horizon Season 1971 Episode 5 – I’m Dependent – You’re Addicted | | 0 | 10 years |
| Horizon Season 1971 Episode 4 – Rumors of War | | 0 | 10 years |
| Horizon Season 1971 Episode 3 – A Bulldozer Through Heaven | | 0 | 10 years |
| Horizon Season 1971 Episode 2 – Great Ormond Street | | 0 | 10 years |
| Horizon Season 1971 Episode 1 – Wildlife – The Last Great Battle | | 0 | 10 years |
