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Season guide

Horizon: 1972

33 episodes Premiered Jan 3, 1972 Updated Sep 25, 2026
Previously on Horizon

Season 9 Lore Primer

Key plot threads, lore context, and character stakes you need to remember before diving into this season.

  • ⚡ Directly follows the overarching narrative developments of Horizon Season 8.
  • ⚡ Faction dynamics and core character alliances shift under escalating external stakes.
  • ⚡ Crucial mysteries introduced previously reach key turning points and narrative reckonings.
  • ⚡ Sets up serialized story arcs that build directly toward the climactic season finale.
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Season 9 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 9 Progress Shield

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Binge Efficiency Engine

Season 9: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

9%
91%
Mytharc (3): Crucial lore & season climaxes
Core (30): Character development & subplots
Side Quest (0): Standalone / filler
S9·E1 Mytharc

The Missing Link

Jan 3, 1972 · 60 min

In this episode of Horizon, you find out how feasible it is to build a 35 mile long tunnel between Britain and France.

S9·E2 Core

Navajo - The Last Red Indians

Jan 10, 1972 · 60 min

Horizon explores the American Navajo indian tribe of New Mexico, in the United States.

S9·E3 Core

How Much Do You Smell?

Jan 17, 1972 · 60 min

Why do humans have such a poor sense of smell as compared to animals? Horizon investigates why.

S9·E4 Core

The Parasite of Paradise

Jan 31, 1972 · 60 min

This story by Horizon reports on Malaria in the country of Gambia, in West Africa.

S9·E5 Core

The Day it Rained Periwinkles

Feb 7, 1972 · 60 min

Horizon investigates reports of strange phenomena and about what the scientific theory is about these phenomena.

S9·E7 Core

How They Sold Doomsday

Feb 21, 1972 · 60 min

In this episode, Horizon looks the the ecological movement, and the resistance against the movement in Britain, and the USA.

S9·E8 Core

For Love or Money?

Feb 28, 1972 · 60 min

In this report by Horizon, the effect of boring jobs on industrial relations is looked at, along with work and job satisfaction.

S9·E9 Core

Whales, Dolphins and Men

Mar 6, 1972 · 60 min

Horizon looks at the life of whales and dolphins, and how they interact with man.

S9·E10 Core

What Is Race?

Mar 13, 1972 · 60 min

Horizon investigates the various conceptions of "race" that have arisen since the 17th century.

S9·E11 Core

The Man-Made Lakes in Africa

Mar 20, 1972 · 60 min

Horizon investigates the use of hydroelectric power in Africa, at Lake Kariba, Lake Volta, and Lake Nasser.

S9·E12 Core

Survival in the Sahara

Mar 27, 1972 · 60 min

This episode of Horizon follows the expedition of two German naturalists exploring the Northwestern desert of the Sahara in Africa.

S9·E13 Core

Mind Over Body

Apr 10, 1972 · 60 min

This story by Horizon is about American research into techniques for controlling bodily functions with the mind.

S9·E14 Core

Out of Volcanoes

Apr 17, 1972 · 60 min

In this report, Horizon looks at the various aspects of volcanoes and explaining the views of some vulcanologists.

S9·E16 Core

Rail Crash

May 8, 1972 · 60 min

Horizon reviews the history of train accidents and the new safety precautions to prevent them.

S9·E17 Core

Do You Dig National Parks?

May 22, 1972 · 60 min

Horizon investigates the threat to the Snowdonia National Park in Britain, from mining companies.

S9·E18 Core

Sorry I Opened My Mouth

Jun 12, 1972 · 60 min

Horizon reports on modern research in the prevention of tooth decay.

S9·E19 Core

The Way We Move

Jul 3, 1972 · 60 min

How do muscles contract and how are they are controlled from the brain through nerve fibers are the subjects of this Horizon episode.

S9·E20 Core

The Life that Lives on Man

Jul 10, 1972 · 60 min

This episode of Horizon explores bacteria and other creatures that live on our skin and in our hair.

S9·E21 Core

Sex Can Be a Problem

Jul 24, 1972 · 60 min

In this episode by Horizon, we take a look at sexual problems, particularly for impotence, frigidity, and premature ejaculation.

S9·E22 Core

The Surgery of Violence

Jul 31, 1972 · 60 min

Horizon explores the development and techniques of brain surgery from the 1950's to present-day in Britain and the USA.

S9·E23 Core

Hospital, 1922

Oct 12, 1972 · 60 min

Horizon reconstructs a day in the life of the old Charing Cross Hospital in Britain just fifty years ago.

S9·E25 Core

The Making of the English Landscape

Oct 26, 1972 · 60 min

This episode of Horizon illustrates the ideas of Prof. W.G. Hoskins on the development of the English landscape from Iron Age times to the present.

S9·E26 Core

Shadows of Bliss

Nov 2, 1972 · 60 min

Horizon reports that High Energy Physics shows a pattern of thought that challenges the very roots of commonplace belief.

S9·E27 Core

The Billion-Dollar Marsh

Nov 9, 1972 · 60 min

This episode of Horizon is about the east coast marshes of America, called the "Wetlands" and the effects of urban development on the wildlife.

S9·E28 Core

Do You Sincerely Want a Long Life?

Nov 16, 1972 · 60 min

Horizon investigates the research that is going into the ageing process to find out its causes and possible prevention.

S9·E29 Core

The Making of a Natural History Film

Nov 23, 1972 · 60 min

This epidsode of Horizon reports on how a group of zoologists at Oxford Scientific Films in England makes films.

S9·E30 Core

Fire

Nov 30, 1972 · 60 min

Horizon documents fire prevention, and fire fighting.

S9·E31 Core

Alaskan Pipe-Dream

Dec 7, 1972 · 60 min

This episode of Horizon centers on the exploitation of oil in Alaska, and the effects of it on the Eskimoes and the local wildlife.

S9·E32 Mytharc

Their Life in Your Hands

Dec 21, 1972 · 60 min

Horizon reports on people suffering from kidney diseases and the current forms of treatment.

S9·E33 Mytharc

Navigating Europe

Dec 28, 1972 · 60 min

Horizon documents how in Europe, they are using water canals for industrial transport, as an alternative to roads.

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