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Season guide

Horizon: 1989

20 episodes Premiered Jan 9, 1989 Updated Sep 25, 2026
Previously on Horizon

Season 26 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 25.
  • ⚡ 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 26 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 26 Progress Shield

Future titles & synopses blurred. Tap "Reveal" on any card to peek.
Binge Efficiency Engine

Season 26: Filler vs. Essential Canon

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

15%
85%
Mytharc (3): Crucial lore & season climaxes
Core (17): Character development & subplots
Side Quest (0): Standalone / filler
S26·E1 Mytharc

The Book of Man

Jan 9, 1989 · 60 min

Horizon looks again at the Human Genome Project which aims to decipher or sequence all genes.

S26·E2 Core

The Poison that Waits

Jan 16, 1989 · 60 min

Horizon reports on the abnormally high incidence of and the early onset of diseases such as senile dementia and Parkinson's disease on the island of Guam in the Pacific. Scientists

S26·E3 Core

Perils of the Deep

Jan 23, 1989 · 60 min

In this episode, Horizon presents evidence that even diving in relatively shallow waters can cause serious long term damage to the brain and spinal cord.

S26·E4 Core

Smart Weapons

Jan 30, 1989 · 60 min

This documentary by Horizon demonstrates how smart Weapons use computers to destroy targets, that until now, were only able to be threatened by nuclear weapons.

S26·E5 Core

Wasting the Alps

Feb 6, 1989 · 60 min

Horizon looks at the damaging effects of pollution and tourism on the Swiss Alps in Europe.

S26·E6 Core

In the Last Resort

Feb 13, 1989 · 60 min

Horizon answers the question: What are the alternatives for the elderly in Britain who can't live at home, or in a rest home or nursing home, or part of a sheltered accommodation?

S26·E7 Core

Gaze in Wonder

Feb 20, 1989 · 60 min

Horizon brings you an interview with Prof. Eric Laithwaite who presents an engineer's personal view of nature and how new inventions already exist in nature.

S26·E8 Core

In My Lifetime?

Feb 27, 1989 · 60 min

In this episode, Horizon presents an investigation into the state of medical research in neurological disorders and the issues with its funding in Britain.

S26·E9 Core

Concerto

Mar 6, 1989 · 60 min

This documentary by Horizon investigates new technology applied to music.

S26·E10 Core

Black Schizophrenia

Mar 13, 1989 · 60 min

Horizon covers the story of the Nottingham psychiatrists who study the human race to see who is mostly likely to develop schizophrenia.

S26·E11 Core

Trial in the Jungle

Mar 20, 1989 · 60 min

This Horizon report covers the Tasaday, a remote Philippine tribe apparently living in the stone age, who are now seen as a hoax. How did they do it?

S26·E12 Core

Who Will Make Me Better?

Apr 3, 1989 · 60 min

Horizon explores three types of alternative medicine; homoeopathy, acupuncture, and diagnosing food allergies by testing your toes.

S26·E13 Core

A Wonderful Life

Apr 17, 1989 · 60 min

Horizon presents a biography of the philosopher Ludwig Wittgenstein who lived from 1889 to 1951.

S26·E14 Core

Why Buildings Make You Sick

Apr 24, 1989 · 60 min

This is a Horizon documentary about an investigation into the so-called "sick building syndrome" where occupants contract illnesses because of the environment within the building.

S26·E15 Core

Jubilee

May 8, 1989 · 60 min

How valid have been Horizon's criticisms of scientific orthodoxy and to what effect have the programs had?

S26·E16 Core

Crash

May 15, 1989 · 60 min

Horizon investigates how many of the tragedies on our roads in Britain could be avoided by the introduction of technical and legislative changes.

S26·E17 Core

The New Sixth Sense

May 22, 1989 · 60 min

Horizon follows J. Hooper, a diabetic, as she explores various aspects of biosensor technology.

S26·E18 Core

Clive Sinclair: The Anatomy of an Inventor

Jun 12, 1989 · 60 min

Horizon presents a profile of noted inventor Clive Sinclair with his family and colleagues reminiscing and analysing his successes and failures.

S26·E19 Mytharc

Newpin: A Lifetime

Jun 19, 1989 · 60 min

In this story, Horizon explores how the destructive patterns of child abuse and depression can be broken by concentrating on the mothers of young children.

S26·E20 Mytharc

Time of Darkness

Jun 26, 1989 · 60 min

In this Horizon episode, we look at the effects on the climate from volcanic eruptions.

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