1. The River That Came Clean
Aired: Jan 7, 1977Horizon documents the life of crocodiles and alligators, and their breeding a...
2. Blueprints in the Bloodstream
Aired: Jan 14, 1977Horizon traces the history of the oral contraceptive pill through the last 60...
3. 40 Years of Murder
Aired: Jan 21, 1977Horizon looks at how recent excavations in Africa have changed the accepted i...
4. Darwin's Dream
Aired: Feb 4, 1977Horizon investigates Sociobiology, which is a study of human social behaviour...
5. The Cry for Help
Aired: Feb 18, 1977In this episode, Horizon explores how animal experiments are carried out in B...
6. The Sunspot Mystery
Aired: Feb 25, 1977Horizon presents a story that depicts an astonishingly harsh way of life of t...
7. The Rhine's Revenge
Aired: Mar 4, 1977This story by Horizon traces the efforts of astronomers and scientists throug...
8. Icarus' Children
Aired: Mar 11, 1977Horizon looks at an ecological study of the Ythan estuary in Scotland.
9. The Healing Nightmare
Aired: Mar 18, 1977In this episode, Horizon investigates research into solar energy in the USA, ...
10. The Great Wine Revolution
Aired: Apr 1, 1977Horizon explores the debate on human genetic engineering.
11. Living Machines
Aired: Jul 15, 1977BBC television documentary which explores, using live-action dramatisation, t...
12. A Land for All Reasons
Aired: Jul 22, 1977In this episode, Horizon looks at how, despite the high costs of the National...
13. I Don't Want to Be a Burden
Aired: Jul 29, 1977This Horizon report is about Prof. Hubert Montagner and his study of non-verb...
14. Zero G
Aired: Aug 5, 1977Documentary about the physiological and psychological effects of living in a ...
15. The Message in the Rocks
Aired: Sep 2, 1977This is a report by Horizon on the successful clean-up of the River Thames in...
16. The Eddystone Lights
Aired: Sep 9, 1977This Horizon episode reports on research by scientists into identifying a sys...
17. Light of the 21st Century
Aired: Sep 16, 1977Covers the development and progress of lasers including topics of medical use...
18. The New Breadline
Aired: Sep 30, 1977This Horizon episode examines the growing British problem of attempted suicid...
19. Now the Chips are Down
Aired: Oct 7, 1977Horizon examines the rise of the microprocessor and asks if automation presen...
20. Explosions in the Mind
Aired: Oct 21, 1977Horizon presents the story of how the river Rhine has defended itself against...
21. One Small Step
Aired: Dec 2, 1977Horizon presents a report on the prize offered to the first person who could ...
22. The TseTse Trap
Aired: Dec 9, 1977This episode of Horizon is a dramatized reconstruction of breakdown of Carl G...
23. A Whisper from Space
Aired: Dec 23, 1977Horizon explores a new science-based revolution in the production of wine.