Episode 1
Awakening the Frozen Addicts
1h
Horizons presents a report on a daring Swedish operation that transplants foetal tissue into the brains of Parkinson's disease sufferers.
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 30 episodes
Choose an episode, then use the watch options above for the show.
Episode 2
Cheating Time
1h
Horizon investigates the current benefits and disadvantages of Hormone Replacement Therapy (HRT).
Where to watch HorizonEpisode 3
TB - The Forgotten Plague
1h
This Horizon episode is about the new and terrible threat from tuberculosis which kills more people than any other infection.
Where to watch HorizonEpisode 4
No Ordinary Genius (1)
1h
This is the first part of a two-part Horizon series presenting a portrait of Richard Feynman, the American Nobel Prize winning physicist.
Episode credits
Directed by Christopher SykesGuest stars Richard Feynman
Episode 5
No Ordinary Genius (2)
1h
This is the second part of a two-part Horizon series presenting a portrait of Richard Feynman, the American Nobel Prize winning physicist.
Episode credits
Guest stars Richard Feynman
Episode 6
Mars Alive
1h
This Horizon episode attempts to answer the question if it will be possible to 'terraform' Mars by creating a new atmosphere, and then adding water and plants to make the planet habitable.
Where to watch HorizonEpisode 7
Suggers, Fruggers and Data-Muggers
1h
Horizon investigates how market research, opinion polls, TV ratings, and consumer surveys have got it disastrously wrong. Commercial decisions depend increasingly on this information, but just how good is that information?
Where to watch HorizonEpisode 8
The Pyramid Builders
1h
This Horizon documentary looks at how the ancient Egyptians built the pyramids without the use of the wheel, ramps, or levers.
Where to watch HorizonEpisode 9
Here Be Monsters
1h
This documentary by Horizon looks at how the Hubble space telescope is uncovering evidence of black holes in our distant galaxies.
Where to watch HorizonEpisode 10
Iceman (Update)
1h
This is a Horizon update to the story of the Stone Age man found frozen in an Alpine glacier in 1991.
Where to watch HorizonEpisode 11
Whatever Happened to Star Wars
1h
Horizon shows how American scientists struggled to fulfil the dreams which challenged fundamental scientific laws.
Where to watch HorizonEpisode 12
Resurrecting the Dead Sea Scrolls
1h
In this episode, Horizon examines the latest scientific evidence about the Dead Sea Scrolls.
Where to watch HorizonEpisode 13
Dante Goes to Hell
1h
Horizon presents the story of a robot named Dante, who goes into an active volcano in Antarctica to find out if volcanoes contribute to the ozone hole in our atmosphere.
Where to watch HorizonEpisode 14
Ghosts in the Dinosaur Graveyard
1h
Follows a team of archaeologists led by Michael Novacek as they try to retrace the steps of an expedition launched by the American Museum of Natural History in the 1920's. The original expedition sought the origins of humanity but instead came across a virtual graveyard of the dinosaurs.
Where to watch HorizonEpisode 15
The New Alchemists
1h
Horizon reports on scientists who are planning smart aircraft wings and smart buildings that can sense earthquakes.
Where to watch HorizonEpisode 16
Allergic to the 20th Century
1h
In this episode, Horizon examines Asthma, the illness that is the most common condition of the developed world.
Where to watch HorizonEpisode 17
Wot U Looking At?
1h
Horizon looks at causes of violence and asks psychologists to interview men and boys with a record of violence.
Where to watch HorizonEpisode 18
The Electronic Frontier
1h
In this story, Horizon explores the endless stream of digital information available on demand to the public, but do we need, or even want it?
Where to watch HorizonEpisode 19
A Vital Poison
1h
Horizon describes how researchers discovered that a lethal gas, called nitric oxide, was behind some of the most basic functions of our bodies.
Where to watch HorizonEpisode 20
Chimp Talk
1h
This documentary by Horizon looks back into the 1980's where the work of pioneer researchers trying to determine if chimpanzees could understand language was attacked as charlatanism. Now the public opinion has moved back in favour of the idea that apes can indeed talk to us. The program looks at the latest developments in the chimpanzee language laboratories in America.
Episode credits
Directed by Genya Niio, Jenny JonesWritten by Jenny JonesGuest stars Sue Savage-Rumbaugh, Patricia Marks Greenfield, Duane Rumbaugh, Sarah Boyson, Beatrix Gardner
Episode 21
Life is Impossible
1hfinale
Horizon investigates how life began on Earth. Did it evolve on land surfaces on Earth, in the sea, or in space?
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