Horizon Season 4 Episode release dates & where to watch

1. Sons of Cain

Horizon probes into whether aggressiveness is our birthright and can society live without violence?

2. When Is a Body Dead? / How to Win Friends and Influence People

Medical advances have made it possible for 'life' to be maintained in an unconscious patient who has irrevocable brain damage and who might also be dependent on artificial aids to circulation and respiration. Is it now meaningless to define 'death' as the cessation of a heart beat? Why do so many people have difficulty In communicating, or in simply getting-on with other people? Psychologists have now begun to analyse aspects of social behaviour in a way which they believe will lead to more pleasant and more effective human relationships.

3. How Best to Make a Man / How Best to Make a Scientist

In this episode, Horizon looks at a new school of mathematics and physics near Novosibirsk in Siberia, Russia. This school uses a competition held for Russian school children to qualify new students.

4. Dynamo - The Life of Michael Faraday

Horizon profiles the life of the greatest physical scientist: Michael Faraday. Crucial events of his scientific career in science are reconstructed.

5. Migraine

Horizon looks at some research recently carried out into the migraine headache and the means to provide treatment for it.

6. How Safe Is Surgery?

Horizon probes in the danger of germs and infection in the operating theater and the methods currently used to prevent contamination.

7. Sleep and Dreams

Joel, a healthy young American, is reduced to a restless neurotic state after being deprived of his dreams for three nights. Mr Bates, an eighty-four-year-old ex-milk man, has never dreamed in his life, or so he says until he is woken by scientists in the middle of a dream trip to New York.

8. The Shape of War to Come

Will the next major war be fought with biological and chemical weapons? What are the available weapons? What is the horror they can cause? Is there any moral justification for their use?

9. Memory

Horizon explores the part of the human brain devoted to memory.

10. Masters of the Desert

Horizon reports on the methods being used to irrigate the Negev Desert, making it fertile based on the methods of ancient civilizations.

11. Cancer - The Search for the Virus

In this the first of two programmes dealing with cancer, Horizon looks at the intensive search now going on to discover whether a virus is one of the causes of cancer in humans and at the implications of this search in the treatment for such killer diseases as leukemia.

12. Cancer - The Smoker's Gamble

Why is there doubt in so many people's minds about the relationship between lung cancer and smoking? Tonight's programme examines the latest scientific evidence in detail.

13. Science and the Supernatural

Horizon explores the work in the developmental field of Extra Sensory Perception (ESP).

14. Hypnosis

Horizon explores the misconceptions that people have about what hypnosis is and looks at the medical implications of what it can do.

15. The War of the Boffins

During the human struggles between the British and German air forces ... another conflict was going on step by step, month by month. This was a secret war whose battles were lost or won unknown to the public: and only with difficulty is it comprehended even now by those outside the smalt high scientific circles concerned.

17. Aspects of Alcohol

Horizon looks at a Scottish chemist's unusual application for whisky: a measure of radioactive carbon 14 used for determining how old an object is.

18. Lords of the Sea

Horizon looks into how man is learning to survive in the oceans.

19. Will Art Last?

In this episode, Horizon reports on new materials that are being used as art media by gaining inspiration from factory and industrial processes.

20. Air Safety: The Unknown Factor

Horizon investigates air navigation and flight safety.

21. The Life and Death of the Pine Processionary

Horizon reports on the problem of exterminating the pine processionary caterpillars infestation from the pine forests of Provence, Canada.

22. Koestler on Creativity

Arthur Koestler talks about the psychological theories of creativity and the role of the mind in science and art.

23. The World of Ted Serios

Horizon looks into the life of Ted Serios who claims to have psychic powers and to be able to project images onto film using only his thoughts.

24. Professor in Toyland Finale

Prof. J. Sumner-Miller asks some questions for enquiring minds on walking, singing, swimming, and flying toys.