As of July 2026, Horizon Season 3 aired in 1966 with 23 episodes — streaming now on PBS. Full episode guide and where to watch below.
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Horizon Season 3

1966 23 Episodes Documentary ⭐ 7/10

Horizon Season 3 has built a real following on among viewers who want documentaries that actually inform. The 1-season run is exactly the right length for what it is doing. 34 people have weighed in on TMDB, and the verdict leans heavily positive. Rigorous in a way documentary storytelling does not always commit to. Put it on tonight and see for yourself.

There is a reason Horizon Season 3 keeps coming up in conversation. Horizon Season 3 approaches its subject with the rigour that makes documentary storytelling worth taking seriously. Season 3 of Horizon includes 23 episodes. It aired from January 1966 to December 1966. Episodes include "Windows of the Soul / Elixir of Youth", "The Troubled Mind / Triple-A. It was aired in 1966. Documentary work at this level requires access that is hard to get and storytelling that does justice to it — Horizon Season 3 has both. It delivers reliably on what it promises, which is more than most of its competition manages.

Horizon Season 3 is the kind of documentary you immediately want to recommend to someone else. If you have run out of similar titles to watch, this is a strong next pick. Short enough to finish in a weekend, substantial enough to feel satisfying. Getting this level of access rarely happens twice. The kind of documentary that makes you feel informed rather than manipulated.

📡 Where to Watch Horizon Season 3

🇺🇸 United States
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🎬 Horizon Season 3 — Episode Guide

E1
Windows of the Soul / Elixir of Youth
1966-01-02
Horizon follows experiments on the eyes being undertaken at the Department of Psychology at the University of Chicago. The purpose of the experiments are to discover if our eyes can tell us things we might prefer to keep secret. In Romania, more than forty thousand people have been given Gerovital ...
E2
The Troubled Mind / Triple-A. S.
1966-01-16
Horizon explores an American mental hospital, observing schizophrenic patients under treatment with remarkable new drugs. The American equivalent of the British Association, the American Association for the Advancement of Science, met in Berkeley, California between Christmas and New Year.
E3
A Man of Two Visions / The Scientist Applied
1966-01-30
A profile of Dr. Albert Copley, the famous hematologist, who is also known as an accomplished artist under the name of Alcopley. For a country striving to raise its productivity, the supply of applied scientists is tremendously important. Professor S. A. Tobias, an engineer, and Lord Todd, ex-chair...
E4
The Dolphins that Joined The Navy / A Theory of The Earth
1966-02-13
Horizon looks at the research of dolphins being conducted at a United States naval base in Port Magu, California. The research concentrates on the dolphin's abilities of navigation. The eminent Canadian geologist, Professor Tuzo Wilson, explains his new 'Froth on the Broth' theory of the structure ...
E5
Route 128
1966-02-27
North of Boston, on Route 128, a new industrial landscape based on science is developing. Here men of high intellectual qualifications are developing way-out products, including a helicopter powered by radio waves, a computer which teaches medical diagnosis, and a hair-raising way of testing driving...
E6
The Beginning of Life / Science Friction
1966-03-13
A remarkable Swedish film of the gradual development of the human embryo from fertilisation until birth. One man's impression of what science has done for the modern world: an animated film by Stan Vanderbeek.
E7
So you want to be an Inventor? / The Severed Hand
1966-03-27
Horizon looks into inventors who struggle against exploding technology, the buying power of great industries and taxation problems to make their leaps into the unknown. An account of a remarkable surgical operation recently performed in China.
E8
Chance and Decay / Meteorite Mystery
1966-04-10
Europe's heritage of pictures, statues, and buildings is being destroyed at a frightening rate by atmospheric pollution, but an American scientist has just invented a method of preserving limestone. In 1908, a vast explosion shook the Tungus district of Siberia: was it due to the biggest meteorite ...
E9
Towers of Ilium / The Exploding City
1966-04-24
The location of the historic city of Troy was finally pinned down by the researches of Carl Blegen. By A.D. 2,000, more than half the world's population may be living in cities. The population of some of them may exceed 60 million. This is one of the main preoccupations of the World Institute of Ek...
E10
Man in Space
1966-05-08
Horizon travels to the spacecraft center in Houston, Texas to study astronauts in space and how they react to being in space and the stresses of launching and re-entry.
E11
Destination Mars / Editors in Conference"
1966-05-22
Horizon looks at the possibilities of landing a man on the planet Mars. The Editors of two leading scientific magazines, Dennis Flanagan of the Scientific American, and Nigel Calder of the New Scientist, discuss with Gordon Rattray Taylor the problems of popularizing science and placing it in a soc...
E12
Man meets Duck / The Picture Machines
1966-06-05
Gordon Taylor meets with Konrad Lorenz, the inventor of ethology, and interviews him about his work on animal instinct and his theories about human instinct. The world knows all about the uncanny mathematical abilities of the computer. But what happens when these machines learn to draw?
E13
Where must the Money Go? / Phantoms Incorporated
1966-06-19
Horizon explores substitute 'phantoms' which are used in radiation studies, manned spaceflight experiments and accident research that gives valuable information on the limits of tolerance on the human body.
E14
Genes in Action / Scientists and War
1966-07-03
Dr. John Gurdon talks about the action of the chromosomes puffing when they undergo intense genetic activity. Sir Solly Zuckerman talks about his new book Scientists and War which outlines his views on the impact of science on affairs civil and military.
E15
The Lonely Children
1966-07-17
Horizon investigates the research conducted in England and America on the problems associated with autistic children.
E16
Man of Science / 'Nature' Tomorrow
1966-07-31
This episode of Horizon reports on the famous science fiction writer, H. G. Wells. An interview with John Maddox, the new editor of one of the world's most influential scientific journals, Nature, in which he discusses his ideas for bringing up-to-date the magazine's coverage of scientific events.
E17
M.I.T.'s ABC / The Disturbed Child
1966-09-25
Horizon reports on the the Massachusetts Institute of Technology. Many parents know that their child has a problem but do not have the necessary insight to deal with it. A psychiatrist uses drawings and paintings to reveal children's characters.
E18
Ten Years in the Antarctic
1966-10-10
Horizon looks at the scientific research being carried out in the Antarctic under the guidance the Scientific Committee for Antarctic Research (SCAR) which was formed in 1856.
E19
The Athlete
1966-10-24
Horizon investigates the stresses on athletes.
E20
From Peenemunde to the Moon
1966-11-07
Christopher Chataway presents a program on the development of the rocket, first as a weapon, and then for the American space program.

📋 All Seasons of Horizon

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