Episode 1
Sizewell Under Pressure
1h
Horizon investigates if Britain should build a United States designed nuclear power station that uses a pressurized water reactor at its core.
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 20 episodes
Choose an episode, then use the watch options above for the show.
Episode 2
The Tropical Time Machine
1h
Horizon presents a report by Dr. Alison Jolly who discusses the country of Madagascar, just off of the west coast of Africa. Madagascar's ecology and conservation programs are in conflict with most third world economies.
Where to watch HorizonEpisode 3
The Geneva Event
1h
Horizon brings you a report about the discovery of two new, and unimaginably short-lived, subatomic particles called "W" and "Z".
Where to watch HorizonEpisode 4
How Much Can You Drink?
1h
Horizon examines some of the effects that moderate amounts of alcohol can have on the body.
Where to watch HorizonEpisode 5
Talking Turtle
1h
In the Horizon documentary, we look new ways of using computers in classroom and to what effect computers in our schools will have in future.
Where to watch HorizonEpisode 6
What Little Girls are Made of
1h
Horizon investigates the way girls and boys were taught science and related subjects at schools.
Where to watch HorizonEpisode 7
British Science - On the Wrong Track?
1h
Horizon reports on the state of scientific research in Britain and the past blunders of the National Research Development Council.
Where to watch HorizonEpisode 8
The Great Plains Massacre
1h
In this Horizon documentary, we look back at the event surrounding the near extermination of the North American bison (buffalo) in the 1880's.
Where to watch HorizonEpisode 9
Hard Rock
1h
The Horizon episode is about the Carsington Aqueduct Scheme in Derbyshire, England, and the massive excavation problems encountered during construction.
Where to watch HorizonEpisode 10
Better Mind the Computer
1h
Horizon presents a look at the current research into artificial computer intelligence.
Where to watch HorizonEpisode 11
Madness on Trial
1h
Horizon looks at the mental problem of schizophrenia and how madness is medically diagnosed.
Where to watch HorizonEpisode 12
Sixty Minutes to Meltdown
1h
In this episode, Horizon investigates the nuclear accident which took place in the United States at the Three Mile Island nuclear power plant during March 1979.
Where to watch HorizonEpisode 13
Killer in the Village
1h1.0 / 10
In this report, Horizon looks at the spread of the AIDS virus in the United States and their search for the cause and cure of the deadly disease.
Where to watch HorizonEpisode 14
The Case of ESP
1h
n this documentary, Horizon investigates the power of the mind for psychic phenomena; telepathy, clairvoyance, precognition, and psychokinesis.
Where to watch HorizonEpisode 15
The Artificial Heart
1h
Horizon investigates the current research into development and use of an artificial heart.
Where to watch HorizonEpisode 16
Dr. Priestley and the Breath of Life
1h
This report by Horizon examines the experiments of Joseph Priestly on blood and oxygen in photosynthesis.
Where to watch HorizonEpisode 17
Professor Hawking's Universe
1h
This episode of Horizon features Prof. Stephen Hawking and how he copes with his severe disability, his scientific career, and his relationship with his students.
Episode credits
Guest stars Stephen Hawking
Episode 18
The Cruel Choice
1h
Horizon presents a discussion on the use of animals for experiments.
Where to watch HorizonEpisode 19
A Child's Guide to Languages
1h
Looks at different ways of teaching a foreign language and contrasts them with the way babies and young children pick up their native language, without formal teaching.
Where to watch HorizonEpisode 20
China's Child
1h
Horizon examines how the government of China presents the "one child per family" population policy to the people.
Where to watch HorizonEpisode 21
The Earthquake Connection
1h
Horizon investigates today's research into earthquakes and the usefulness of the findings.
Where to watch HorizonEpisode 22
Prisoner or Patient?
1h
Horizon presents this documentary on how Britain deals with its mentally ill criminal offenders.
Where to watch HorizonEpisode 23
Cancer: The Pattern in the Genes
1h
In this report, Horizon outlines the latest research into cancer with specific reference to oncogenes.
Where to watch HorizonEpisode 24
The Academy
1hfinale
Horizon follows group of men and women going through basic training in Federal Bureau of Investigation (FBI) methods at the Academy in the United States.
Where to watch HorizonEpisode information updated Jul 25, 2026
Available now in United States
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Browse new showsMore about Horizon
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