Episode 1
A Matter of Self-Defense
1h
This episode of Horizon explains how our body fights infections and cancers and brings us up-to-date on recent research in immunology.
Where to watch Horizon
TV series
Horizon
1964TV-PG62 seasons7.5 / 10
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Availability
Not streaming in United States
Checked Sep 3, 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 11 episodes
Choose an episode, then use the watch options above for the show.
Episode 2
Bird Brain - The Mystery of Bird Navigation
1h
This episode of Horizon is about various experiments on migratory birds and homing pigeons to try and discover how they navigate.
Where to watch HorizonEpisode 3
Never Too Late to Learn
1h
Horizon reports on the British Open University and how it operates.
Where to watch HorizonEpisode 4
The Great Fish Hunt
1h
Horizon investigates how Britain has hunted fish in the past and how improved fish catching techniques have severely reduced fish stocks.
Where to watch HorizonEpisode 5
Pedal Power
1h
This episode of Horizon is about the history of the bicycle and the possibility of it being able to ease the traffic problems in Britain.
Where to watch HorizonEpisode 6
The Writing on the Wall
1h
In this episode, Horizon looks at connections between crime and poor housing design in the USA.
Where to watch HorizonEpisode 7
Where Did the Colorado Go?
1h
Horizon investigates reports of abuse of the Colorado river in the USA.
Where to watch HorizonEpisode 8
The Future Goes Boom
1h
Horizon examines the British Hudson Institute's methods and predictions for the future of economics.
Episode credits
Directed by Brian Gibson
Episode 9
Fusion: The Energy Promise
1h
In this Horizon episode, we look at attempts by scientists to solve the energy crisis of future by building nuclear fusion reactors.
Where to watch HorizonEpisode 10
The First Ten Years
1h
In this report, Prof. John Maynard Smith looks back at some of the subjects Horizon has presented since 1964.
Where to watch HorizonEpisode 11
This Yankee Dodge Beats Mesmerism Hollow
1h
Horizon looks back at the discovery and the development of anesthesia.
Where to watch HorizonEpisode 12
The Hunting of the Quark
1h
This Horizon episode is about the search for quarks, thought to be the substance of which electrons, protons, and neutrons are made of.
Where to watch HorizonEpisode 13
A Noah's Ark for Europe
1h
Horizon investigates captive animal breeding to prevent extinction of animal species in the wild.
Where to watch HorizonEpisode 14
Bridges: When It Comes to the Crunch
1h
Horizon reports on bridges in Britain...how safe are they?
Where to watch HorizonEpisode 15
Search for Life
1h
Documentary about the origins of life which attempts to find out what happened in the one billion years before fossil evidence begins.
Where to watch HorizonEpisode 16
The Secrets of Sleep
1h
Horizon investigates the subject of sleep in Britain and the USA.
Where to watch HorizonEpisode 17
Who Needs Skills?
1h
In this episode of Horizon, you learn about transferring the basis of modern industry production from human skills to computer programmed machines.
Where to watch HorizonEpisode 18
Hills of Promise
1h
In this report, Horizon presents the state of hill farming in Wales.
Where to watch HorizonEpisode 19
The Race for the Double Helix
1h
This documentary of Horizon reports on the discovery of the structure of DNA in 1953 by Dr. Francis Crick and Prof. James Watson.
Episode credits
Guest stars Michael Swann, Francis Crick, James Watson
Episode 20
The Immigrant Doctors
1h
In this episode, Horizon reports on the rising number of imigrant doctors working in the National Health System of Britain.
Episode credits
Directed by Brian Gibson
Episode 21
Mines, Minerals and Men
1h
Horizon explores the technological and economic reasons for the mining revival in Britain.
Where to watch HorizonEpisode 22
What Price Steak?
1h
Horizon reports on the beef crisis and rising prices.
Where to watch HorizonEpisode 23
Listen and Be Loyal
1h
Horizon brings you a report by Tom Harrison on anti-nazi propaganda in Britain during World War II.
Where to watch HorizonEpisode 24
Adam or Eve?
1h
This episode of Horizon investigates the role that hormones play in the stages of mammalian sexual development.
Where to watch HorizonEpisode 25
An Unholy Scramble
1h
Horizon investigates some of the risks and problems involved in bringing oil from the North Sea ashore.
Where to watch HorizonEpisode 26
Do as You Are Told
1h
This report by Horizon explores how far people are prepared to suppress their own moral scruples in the face of necessity to obey authority.
Where to watch HorizonEpisode 27
The First Signs of Washoe
1h
Horizons reviews the scientific work of Americans in the field of research in communication with animals.
Where to watch HorizonEpisode 28
The Other Way
1h
Horizon presents Dr. Schumacher's theory that use of modern technology could make the working week a creative experience.
Where to watch HorizonEpisode 29
The Greatest Advance Since the Wheel?
1h
Sixty years ago a Dutch scientist discovered a phenomenon that overturned the electrical rule book. By cooling certain metals to incredibly low temperatures he found they could continue to carry an electric current for ever, even when the power supply was switched off. Today, developments of these metals - called superconductors-have led to trains that fly, magnets that could depollute rivers and machines that promise cheaper power.
Where to watch HorizonEpisode 30
Joey
1h8.0 / 10
This story by Horizon reconstructs the true life story of Joey Deacon.
Episode credits
Directed by Brian Gibson
Episode 31
The Neglected Harvest
1h
Horizon investigates the developments and research in forestry which may now help to overcome shortage of timber.
Where to watch HorizonEpisode 32
How on Earth Did They Do That?
1h
This documentary by Horizon reports on the development of cinematographic special effects from 1890's to date.
Where to watch HorizonEpisode 33
The Lysenko Affair
1hfinale
Horizon presents a dramatized documentary on the rise to power of Trofim Denisovich Lysenko, a young Ukrainian agriculturalist.
Episode credits
Written by John WilesGuest stars Frank Gillard, Terrence Hardiman, David Swift, Simon Lack, Richard Ireson, George Cormack, Forbes Collins, Richard Beale
Episode information updated Aug 18, 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
- 1,174
- Original language
- English
Networks & production
BBC TwoUnited Kingdom
Themes
philosophyscience