Episode 1
Colourful Notions
1h
Documentary about colour perception based on the theories of Dr. Edwin Land, which oppose the long-held three-receptor theory of colour vision
Where to watch Horizon
TV series
Horizon
1964TV-PG62 seasons7.4 / 10
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Availability
Not streaming in United States
Checked Jul 22, 2026
Horizon premiered February 4, 1964. We don't have a confirmed streaming, rental or purchase option yet.
Synopsis
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 22 episodes
Choose an episode, then use the watch options above for the show.
Episode 2
A World of Their Own
1h
Horizon takes a look at consultant psychiatrists.
Where to watch HorizonEpisode 3
Decoding Danebury
1h
Horizon looks at the way modern archaeologists extract information from a site dig.
Where to watch HorizonEpisode 4
A Mission to Heal
1h
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.
Where to watch HorizonEpisode 5
Mystery of the Left Hand
1h
In this episode, Horizon explores the characteristics of left-handed people.
Where to watch HorizonEpisode 6
The Theatre of War
1h
Horizon examines new military technology which will come to dominate the battlefields of the future.
Where to watch HorizonEpisode 7
The Careful Predator
1h
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.
Where to watch HorizonEpisode 8
What Einstein Never Knew
1h
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.
Where to watch HorizonEpisode 9
Eurekaaargh!
1h
Horizon brings you a report by Robert Symes who offers ten golden guidelines on how to be a successful inventor.
Where to watch HorizonEpisode 10
Careering On
1h
This is a Horizon follow-up report on the careers of seven British teenagers studying Science 'O' levels back in 1978.
Where to watch HorizonEpisode 11
How to Film the Impossible
1h
This episode of Horizon looks at how the world's best special effects technicians create some of Hollywood's most spectacular film scenes.
Where to watch HorizonEpisode 12
The Food Allergy War
1h
Horizon investigates how food allergy has developed from the 1950's to the present.
Where to watch HorizonEpisode 13
The Goddess of the Earth
1h
Horizon examines a hypothesis that life itself manipulates the planet to enhance it's own survival.
Episode credits
Guest stars Paul Vaughan
Episode 14
IRAS - The Supercooled Eye
1h
This Horizon documentary examines the Infra-Red Astronomical Satellite (IRAS) which has detected evidence of planetary systems around distant stars.
Where to watch HorizonEpisode 15
A Prize Discovery
1h
Horizon reports on the current medical treatment of Malaria and Leukemia.
Where to watch HorizonEpisode 16
The Wrong Stuff
1hfinale
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.
Where to watch HorizonEpisode information updated Jul 25, 2026
Available now in United States
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Cast
Richard Branson
Nicholas SoamesBob Brier
Robert Winston
Robert GalloTrevor R. Bryce
Joshua Wurman
Bill PatersonProduction details
- Status
- Returning Series
- Series type
- Documentary
- Episodes
- 1,173
- Original language
- English
Networks & production
BBC TwoUnited Kingdom
Themes
philosophyscience