Horizon Season 9 Episode release dates & where to watch

1. The Missing Link

In this episode of Horizon, you find out how feasible it is to build a 35 mile long tunnel between Britain and France.

2. Navajo - The Last Red Indians

Horizon explores the American Navajo indian tribe of New Mexico, in the United States.

3. How Much Do You Smell?

Why do humans have such a poor sense of smell as compared to animals? Horizon investigates why.

4. The Parasite of Paradise

This story by Horizon reports on Malaria in the country of Gambia, in West Africa.

5. The Day it Rained Periwinkles

Horizon investigates reports of strange phenomena and about what the scientific theory is about these phenomena.

6. Are You Doing This for Me Doctor, or Am I Doing It for You?

Horizon explores if a doctor's treatment of the patient is always in the best interest of the patient.

7. How They Sold Doomsday

In this episode, Horizon looks the the ecological movement, and the resistance against the movement in Britain, and the USA.

8. For Love or Money?

In this report by Horizon, the effect of boring jobs on industrial relations is looked at, along with work and job satisfaction.

9. Whales, Dolphins and Men

Horizon looks at the life of whales and dolphins, and how they interact with man.

10. What Is Race?

Horizon investigates the various conceptions of "race" that have arisen since the 17th century.

11. The Man-Made Lakes in Africa

Horizon investigates the use of hydroelectric power in Africa, at Lake Kariba, Lake Volta, and Lake Nasser.

12. Survival in the Sahara

This episode of Horizon follows the expedition of two German naturalists exploring the Northwestern desert of the Sahara in Africa.

13. Mind Over Body

This story by Horizon is about American research into techniques for controlling bodily functions with the mind.

14. Out of Volcanoes

In this report, Horizon looks at the various aspects of volcanoes and explaining the views of some vulcanologists.

15. The Wizard Who Spat on the Floor

Horizon presents a study of Thomas Alva Edison and his achievements as an inventor.

16. Rail Crash

Horizon reviews the history of train accidents and the new safety precautions to prevent them.

17. Do You Dig National Parks?

Horizon investigates the threat to the Snowdonia National Park in Britain, from mining companies.

18. Sorry I Opened My Mouth

Horizon reports on modern research in the prevention of tooth decay.

19. The Way We Move

How do muscles contract and how are they are controlled from the brain through nerve fibers are the subjects of this Horizon episode.

20. The Life that Lives on Man

This episode of Horizon explores bacteria and other creatures that live on our skin and in our hair.

21. Sex Can Be a Problem

In this episode by Horizon, we take a look at sexual problems, particularly for impotence, frigidity, and premature ejaculation.

22. The Surgery of Violence

Horizon explores the development and techniques of brain surgery from the 1950's to present-day in Britain and the USA.

23. Hospital, 1922

Horizon reconstructs a day in the life of the old Charing Cross Hospital in Britain just fifty years ago.

24. When Polar Bears Swam in the Thames

This episode of Horizon looks the how the ice age physically shaped the British landscape.

25. The Making of the English Landscape

This episode of Horizon illustrates the ideas of Prof. W.G. Hoskins on the development of the English landscape from Iron Age times to the present.

26. Shadows of Bliss

Horizon reports that High Energy Physics shows a pattern of thought that challenges the very roots of commonplace belief.

27. The Billion-Dollar Marsh

This episode of Horizon is about the east coast marshes of America, called the "Wetlands" and the effects of urban development on the wildlife.

28. Do You Sincerely Want a Long Life?

Horizon investigates the research that is going into the ageing process to find out its causes and possible prevention.

29. The Making of a Natural History Film

This epidsode of Horizon reports on how a group of zoologists at Oxford Scientific Films in England makes films.

30. Fire

Horizon documents fire prevention, and fire fighting.

31. Alaskan Pipe-Dream

This episode of Horizon centers on the exploitation of oil in Alaska, and the effects of it on the Eskimoes and the local wildlife.

32. Their Life in Your Hands

Horizon reports on people suffering from kidney diseases and the current forms of treatment.

33. Navigating Europe Finale

Horizon documents how in Europe, they are using water canals for industrial transport, as an alternative to roads.