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Season guide

Horizon: 1987

22 episodes Premiered Jan 5, 1987 Updated Sep 25, 2026
Previously on Horizon

Season 24 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 23.
  • ⚡ 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 24 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 24 Progress Shield

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Binge Efficiency Engine

Season 24: Filler vs. Essential Canon

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

18%
82%
Mytharc (4): Crucial lore & season climaxes
Core (18): Character development & subplots
Side Quest (0): Standalone / filler
S24·E1 Mytharc

The Twenty-Five Hour Clock

Jan 5, 1987 · 60 min

Report on research into biological body clocks, which can effect emotional and physical health and well-being.

S24·E2 Mytharc

The Search for the Disappeared

Jan 12, 1987 · 60 min

Report on how forensic scientists ae identifying individual victims amongst the people murdered by Argentina's military juntas, by examination and genetic testing of their remains.

S24·E3 Core

The Blind Watchmaker

Jan 19, 1987 · 60 min

In this interview by Horizon, zoologist Richard Dawkins investigates an attack on evolution by scientific creationists, based on the book of the same name by the famous zoologist.

S24·E4 Core

Riding the Stack

Jan 26, 1987 · 60 min

Astronauts and space shuttle designers talk about the risks of space flight, in the light of the space shuttle disaster of January 1986.

S24·E7 Core

Energy from Outer Space

Feb 16, 1987 · 60 min

Report on exploration into releasing energy sources which came from outer space during the formation of the earth, 4,500 million years ago, and have lain dormant under the earth's

S24·E8 Core

The Return of the Osprey

Feb 23, 1987 · 60 min

Documentary on the Osprey in north east America, where its natural habitat was being damaged by the use of DDT, but after some conservation work the Osprey is returning to the area

S24·E9 Core

Can AIDS Be Stopped?

Mar 2, 1987 · 60 min

Report on the development of the AIDS virus, and current research into vaccines to combat the disease.

S24·E10 Core

Police Stress: The John Wayne Syndrome

Mar 9, 1987 · 60 min

Documentary on the increasing pressure put on the British police resulting in stress and psychological disorders, and also on the work of Dr. Douglas Duckworth, a psychologist at L

S24·E11 Core

To Engineer Is Human

Mar 16, 1987 · 60 min

Engineer Henry Petroski explains why engineering can never be an exact science and looks at examples of engineering failures.

S24·E12 Core

The Magma Chamber

Mar 23, 1987 · 60 min

Report on the research into volcanoes by British scientists Professor Geoff Brow n and Dr. Hazel Rymer, who have developed a technique of exploring the magma chambers of volcanoes

S24·E13 Core

Broken Images

Mar 30, 1987 · 60 min

Report on two sufferers of visual agnosia. The condition affects their ability to impose order on the visual world, even though they are not blind, but it does reveal a great deal

S24·E14 Core

Trial Babies

Apr 6, 1987 · 60 min

Report on the different tests done on pregnant women to detect abnormalities in the foetus, with investigation of why these tests are not available in all pregnancies.

S24·E15 Core

After Chernobyl - Closer to Home

Apr 13, 1987 · 60 min

Report on the safety of UK nuclear power stations, following the accident at Chernobyl in the USSR in 1986. The programme focuses on the nuclear installation at Hartlepool on Teesi

S24·E16 Core

Making Sex Pay

May 11, 1987 · 60 min

James Gould, Professor of Biology at Princeton University, lectures on the mating habits of animals and humans.

S24·E17 Core

The Anthropic Principle

May 18, 1987 · 60 min

Discussion of the Anthropic Principle, a scientific theory for man's place in th e Universe.

S24·E19 Core

Aircrash: The Burning Issue

Jun 1, 1987 · 60 min

Report on the need for improved safety features on airplanes in particular the desirability of smoke hoods, plus an interview with a survivor of the 1985 Manchester aircrash.

S24·E21 Core

To Catch a Falling Star

May 15, 1987 · 60 min

Report on the future and commercial benefit of research into astronomy conducted by the Royal Greenwich Observatory and other scientific institutions in Great Britain.

S24·E22 Mytharc

In the Light of New Information

Jun 22, 1987 · 60 min

Report on the evolution of laser light technology for communication in the 21st century, with a dramatised account of the effect of the technology on our daily lives.

S24·E23 Mytharc

Janice's Choice

Jun 29, 1987 · 60 min

Janice Blenkharn's mother died of Huntington's Chorea, which any child of a victim has a 50-50 chance of inheriting. Janice is faced with the choice of having a test, developed aft

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