As of July 2026, Horizon Season 12 aired in 1975 with 26 episodes — streaming now on PBS. Full episode guide and where to watch below.
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Horizon Season 12

1975 26 Episodes Documentary ⭐ 7/10

If you want a documentary that respects its subject, Horizon Season 12 is available on right now. Across 1 season, the show has had time to find its rhythm and keep it. 34 viewers have already rated it on TMDB — the kind of consensus that does not happen by accident. Rigorous in a way documentary storytelling does not always commit to. Put it on tonight and see for yourself.

Horizon Season 12 is not trying to be everything to everyone, and that focus is exactly what makes it work. Horizon Season 12 approaches its subject with the rigour that makes documentary storytelling worth taking seriously. Season 12 of Horizon includes 26 episodes. It aired from January 1975 to December 1975. Episodes include "The Killer Dust", "A Time to Be Born", "The Unsafe Sea". It was aired in 1975. What elevates Horizon Season 12 above most documentary work is a refusal to settle for the easy version of the story. It knows exactly what it is, and does not try to be anything else.

Anyone after documentary work that genuinely informs rather than confirms will value Horizon Season 12. It stands on its own even without an obvious comparison point. A contained run means every episode is doing real work. 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 12

🇺🇸 United States
PBS PBS
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🎬 Horizon Season 12 — Episode Guide

E1
The Killer Dust
1975-01-20
This investigative report by Horizon covers an investigation into the deaths of people who inhaled asbestos dust at Acre Mill, Yorkshire, England.
E2
A Time to Be Born
1975-01-27
Investigates the growing tendency in hospitals to induce childbirth by injecting hormones into mothers. The practice has become increasingly widespread in recent years, and this film asks if induction is desirable, necessary, and safe.
E3
The Unsafe Sea
1975-02-10
This episode of Horizon examines the problems of ship safety in the English Channel.
E4
The Change of Life
1975-02-17
Horizon investigates the symptoms of menopause and the various degrees in which it occurs.
E5
Project Fido
1975-02-24
This episode of Horizon shows the peril to man of the ever increasing dog population in the western world.
E6
The Planets
1975-03-10
By the end of 1974, Mars, Venus, Mercury and Jupiter had all been visited by spacecraft. For the first time scientists saw in sharp detail the continents, mountains, valleys and volcanoes of other worlds. Tonight's programme shows how these geological features give clues to the way the planets evolv...
E7
The Long, Long Walkabout
1975-04-07
This report by Horizon covers an investigation by a group of Australian scientists that looks into the origins and history of the Australian Aborigines.
E8
The Overworked Miracle
1975-04-14
This report by Horizon describes the resistance to antibiotics, fast growing in all countries, and the dangers it could mean for the future.
E9
Not the Cheapest, But the Best
1975-04-21
Horizon investigates the life and work of the great engineer, Isambard Kingdom Brunel.
E10
A Spoonful of Roughage
1975-04-28
Horizon explores the effect of fibre in diet on the diseases of western world.
E11
Brain Poison
1975-05-05
Horizon presents an investigation into the effects on health of lead in the urban atmosphere.
E12
The Bulldog's Last Bark?
1975-05-12
This is a Horizon report on the building of the British military deterrent from the first decision to make it in 1941 until the present state of lethargy.
E13
Benjamin
1975-05-19
This episode of Horizon follows the progress of Benjamin Pile, born on 22 November, 1974, at Oxford in Britain.
E14
The McMaster Experiment
1975-06-02
This report by Horizon covers an experiment at McMaster University Medical School, in Ontario, Canada.
E15
The Glazed Outlook
1975-06-09
Horizon investigates the attempts by the University of Newcastle in England to define and create an ideal living and working environment.
E16
The Three Chord Trick
1975-06-16
Horizon explores the psychology of music, as it explains why music has such a powerful emotive effect in every society.
E17
The Cleanest Place in the World
1975-06-23
This report by Horizon brings you scientists that are using Antarctica as a giant natural lab to study who has polluted Earth most; man or nature.
E18
Strange Sleep
1975-06-30
Horizon investigates the discovery of gaseous anaesthetic from 1840 until the early years of 20th century.
E19
The Greatest Advance Since the Wheel?
1975-07-07
Horizon reports on the history of superconductivity, from discovery, to the present.
E20
How Do You Read?
1975-07-14
In this documentary, Horizon reports on the reading process; how it works for the fluent, and how it should be taught.

📋 All Seasons of Horizon

Season 1Season 2Season 3Season 4Season 5Season 6Season 7Season 8

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