Horizon Season 22 Episode release dates & where to watch

1. Colourful Notions

Documentary about colour perception based on the theories of Dr. Edwin Land, which oppose the long-held three-receptor theory of colour vision

2. A World of Their Own

Horizon takes a look at consultant psychiatrists.

3. Decoding Danebury

Horizon looks at the way modern archaeologists extract information from a site dig.

4. A Mission to Heal

This Horizon episode is about a hospital in the African country of Kenya where the medical staff tells of a new approach to health care among the Pokot tribe.

5. Mystery of the Left Hand

In this episode, Horizon explores the characteristics of left-handed people.

6. The Theatre of War

Horizon examines new military technology which will come to dominate the battlefields of the future.

7. The Careful Predator

This episode of Horizon is about the controversial policy in African nation of Zimbabwe of encouraging villagers to allow wild animals back onto their land.

8. What Einstein Never Knew

This documentary by Horizon attempts to explain the advances in physics in the search for the ultimate equation that explains the meaning of life, the universe, and everything else in existence.

9. Eurekaaargh!

Horizon brings you a report by Robert Symes who offers ten golden guidelines on how to be a successful inventor.

10. Careering On

This is a Horizon follow-up report on the careers of seven British teenagers studying Science 'O' levels back in 1978.

11. How to Film the Impossible

This episode of Horizon looks at how the world's best special effects technicians create some of Hollywood's most spectacular film scenes.

12. The Food Allergy War

Horizon investigates how food allergy has developed from the 1950's to the present.

13. The Goddess of the Earth

Horizon examines a hypothesis that life itself manipulates the planet to enhance it's own survival.

14. IRAS - The Supercooled Eye

This Horizon documentary examines the Infra-Red Astronomical Satellite (IRAS) which has detected evidence of planetary systems around distant stars.

15. A Prize Discovery

Horizon reports on the current medical treatment of Malaria and Leukemia.

16. The Wrong Stuff Finale

Eighty per cent of all crashes are caused by 'human error'. Finding out what that means in terms of human behaviour has been called the last great frontier in aviation safety.