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Season guide

Horizon: 1980

25 episodes Premiered Jan 14, 1980 Updated Sep 25, 2026
Previously on Horizon

Season 17 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 16.
  • ⚡ 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 17 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 17 Progress Shield

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Binge Efficiency Engine

Season 17: Filler vs. Essential Canon

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

12%
88%
Mytharc (3): Crucial lore & season climaxes
Core (22): Character development & subplots
Side Quest (0): Standalone / filler
S17·E1 Mytharc

The Ghost Of The Amoco Cadiz

Jan 14, 1980 · 60 min

Documentary examination of the causes and conditions of the sinking of the Amoco Cadiz oil-tanker, in 1978.

S17·E2 Core

You Are Old, Father William

Jan 21, 1980 · 60 min

Documentary examination on the process of ageing and some things that can be done about the problems of senility in old people.

S17·E3 Core

Cleared for Take-Off

Feb 4, 1980 · 60 min

Documentary which looks at the danger points in flying an airliner on a routine flight from Gatwick to Los Angeles. Danger points are identified and we see research into airtraffic

S17·E4 Core

A Sporting Chance

Feb 11, 1980 · 60 min

Documentary on the ways in which athletes from different countries prepare for the Olympic Games and the artificial methods of improving performance, drugs and physiological method

S17·E5 Core

The Cancer Detectives of Lin Xian

Feb 18, 1980 · 60 min

Documentary film on cancer research in the remote Chinese valley of Lin Xian where the population suffers more than 100 times the incidence of oesophagal cancer than normal.

S17·E6 Core

The Big If...

Feb 25, 1980 · 60 min

About Interferon, a drug made from human blood cells, thought to be capable of controlling viruses and cancer

S17·E7 Core

Cash from Trash

Mar 3, 1980 · 60 min

Explores the potential in recycling rubbish in terms of energy and other resources

S17·E8 Core

Encounter with Jupiter

Mar 10, 1980 · 60 min

Documentary on the space voyages of Nasa robot space craft Voyager 1 & 2 and their photographic records of the planet Jupiter.

S17·E9 Core

Portrait of a Poison

Mar 17, 1980 · 60 min

Documentary report on the mounting evidence of the horrifying effects of the use of dioxin as a defoliant in Vietnam and as a herbicide in domestic use on both humans and all other

S17·E10 Core

Magnet Earth

Mar 24, 1980 · 60 min

Looks at what is known about the earth's magnetic field, how it affects the world's organisms and in particular at recent research in this field.

S17·E11 Core

Goodbye Gutenberg

Sep 1, 1980 · 60 min

Documentary on the "information revolution" the advances made in the methods of electronic storage and display of information, and the effects of these advances on democracy, langu

S17·E12 Core

Invasion of the Virions

Sep 8, 1980 · 60 min

Investigates various virus infections ranging from smallpox and rabies down to influenza and the common cold. The way they function and the reasons the body builds up resistance to

S17·E13 Core

Beyond the Milky Way

Sep 15, 1980 · 60 min

Astronomers are seen at work in the UK, Arizona, Hawaii, New Mexico and Australia, describing their discoveries about the galaxies beyond the Milky Way.

S17·E14 Core

Little Boxes

Sep 22, 1980 · 60 min

Documentary about industrial design and the effect it has on the look of everyday life. Dieter Rams, Tom Woolfe, Etore Sottsass and Raymond Loewy are among the designers talking ab

S17·E15 Core

The Other Kenya

Sep 29, 1980 · 60 min

Looks at the contrasts in Kenya between the tourist image and the hardship caused by development. In particular, considers the lives of three family groups native to the country an

S17·E16 Core

Moving Still

Oct 6, 1980 · 60 min

The new perspectives which can be gained on the natural world through time-lapse and high-speed photography. Includes footage of droplets of water merging in mid-air, a bullet spir

S17·E17 Core

The Way Out

Oct 13, 1980 · 60 min

Documentary about London Transport and the decline in its services over the year s. It receives less subsidy than an comparable transport system in the world, but would more GLC ai

S17·E18 Core

The Dead Sea Lives

Oct 20, 1980 · 60 min

Explains, within a historical context, how Israel and Jordan are trying to make use of the Dead Sea. Its mineral-rich waters are being harnessed by scientists and engineers to prod

S17·E19 Core

Once in a Million Years

Oct 27, 1980 · 60 min

Documentary on nuclear energy and the efforts of scientists to contain and control the high risk factors involved with plutonium and uranium.

S17·E20 Core

Smoker's Luck

Nov 3, 1980 · 60 min

Documentary about smoking and about the secondary effects of it. Britain leads the world in smoking deaths at 200 per day. The film looks at prognosis of deat h and at the chances

S17·E21 Core

Behind the Horoscope

Nov 10, 1980 · 60 min

Documentary looking at the scientific facts about the growing cult of Astrology. In this report, Horizon looks at the way astrology has evolved and examines statistical evidence to

S17·E22 Core

The Mondragon Experiment

Nov 17, 1980 · 60 min

Documentary on the twenty-five year old experimental industrial set-up in the Spanish city of Mondragon where most of the factories and laboratories are co-operativetively owned an

S17·E23 Core

The Spike

Nov 24, 1980 · 60 min

Documentary about epilepsy, showing epileptic fits as they occur and explaining what the onlooker should and should not do. Sufferers describe their experiences of the disease and

S17·E24 Mytharc

The Slatemakers

Dec 1, 1980 · 60 min

Documentary on the slatemaking industry of North Wales, now a dying craft, and the people involved with it.

S17·E25 Mytharc

Anatomy of a Volcano

Dec 15, 1980 · 60 min

Chronicles the efforts of geologists throughout the summer of 1980 to study the recently erupted volcano Mt. Saint Helens in Washington State, USA.

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