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Season 1991
1991x1
Sudden Death
Episode overview
Air date
Jan 07, 1991
Documentary considering the nature of sudden death, the effects of coronary heart disease and the part they play.
1991x2
Keen as Mustard
Episode overview
Air date
Jan 14, 1991
This Horizon episode tells the story of the top secret experiments carried out to test the effects of mustard gas.
1991x3
Smokers Can Harm Your Health
Episode overview
Air date
Jan 21, 1991
Horizon investigates the case against passive smoking and reveals new evidence of its danger.
1991x4
Coming In from the Cold
Episode overview
Air date
Jan 28, 1991
Horizon reports on the new arms verification industry emerging due to the new arms control treaties.
1991x5
Small Problems with the Mirror
Episode overview
Air date
Feb 04, 1991
Horizon follows astronomer's efforts to rescue the Hubble space telescope and restore its original planned performance.
1991x6
Two Weeks to Save the Earth
Episode overview
Air date
Feb 10, 1991
Looks at the work of Earthwatch, and some of the many people who spend their holidays contributing to learning about the planet by helping on prehistoric digs, recording fish noises, .. show full overview
1991x7
California Dreaming
Episode overview
Air date
Feb 11, 1991
This Horizon documentary presents the US auto industry's response to clean-up the air in Los Angeles, California by the year 2007.
1991x8
The Day the Earth Melted
Episode overview
Air date
Feb 25, 1991
This episode of Horizon examines 20 years of research which has led to a new theory on how the earth's crust was made.
1991x9
The Curse of Karash
Episode overview
Air date
Feb 25, 1991
Looks at the phenomenon of the outbreaks of a lethal kidney disease amongst groups of people scattered around an area of the Balkans, covering Yugoslavia, Romania and Bulgaria, over the .. show full overview
1991x10
Playing at Noah
Episode overview
Air date
Mar 04, 1991
This Horizon interview presents Dr. Ulysses Seal who believes the "frozen zoo" concept is the best way to save vanishing species for the future generations.
1991x11
Cashing in on Paradise
Episode overview
Air date
Mar 11, 1991
This Horizon episode considers the pros and cons of "ecotourism" and the effects of tourism on the environment. The coral reefs of areas of Belize are suffering already from the effects .. show full overview
1991x12
The Terracotta Time Machine
Episode overview
Air date
Mar 18, 1991
This episode of Horizon explores the Natural History Museum and its philosophy, both past and present. We look at some of the recent innovations that have been introduced in the past few .. show full overview
1991x13
Measuring the Roof of the World
Episode overview
Air date
Mar 25, 1991
Horizon examines the problems and cartography involved in mapping mountains such as Mount Everest. They follow the history of of mapping from those surveys conducted by mountaineering .. show full overview
1991x14
The First Americans
Episode overview
Air date
Apr 15, 1991
Horizon looks at archaeologist's new theories surrounding the population of the New World over 11,000 years ago
1991x15
Inside Chernobyl's Sarcophagus
Episode overview
Air date
Apr 22, 1991
Documentary following the clean-up operation at Chernobyl and the elite team of Soviet scientists working in areas of radiation that would be considered lethal in the West, whilst they .. show full overview
1991x16
Colonising Cyberspace
Episode overview
Air date
Apr 29, 1991
Horizon presents a documentary on how virtual reality can make humans feel as if they are present in the computer simulated artificial world. What is the future of all this powerful, seductive technology?
1991x17
Emerging Viruses
Episode overview
Air date
May 13, 1991
In this report, Horizon follows a group of eminent scientists who believe we have become too complacent about infectious diseases.
1991x18
Camelford - A Bitter Aftertaste
Episode overview
Air date
May 20, 1991
Horizon explores the Camelford disaster, in which aluminium sulphate was accidentally added to drinking water in Cornwall in 1988.
1991x19
Of Big Bangs, Stick Men and Galactic Holes
Episode overview
Air date
Jun 03, 1991
Several astronomers and scientists explore the concepts of "hot/cold dark space" and whether or not the "Big Bang" theory is actually correct, as well as considering the structures of galaxies.
1991x20
Food For Thought
Episode overview
Air date
Jun 10, 1991
This story by Horizon looks at the expanding and controversial area of "smart drugs".
1991x21
The Long Road to the West
Episode overview
Air date
Jun 17, 1991
In this Horizon episode, we look at the problems facing the Carl Zeiss optics company of Jena and other companies in the scientific sector of the former Eastern block countries. .. show full overview
1991x22
Half Hearted About Semi-Skimmed
Episode overview
Air date
Jun 24, 1991
Horizon examines the social and scientific issues around the cholesterol debate.
1991x23 Season finale
T-Rex Exposed
Episode overview
Air date
Jul 01, 1991
Considers some of the different theories surrounding the Tyrannosaurus Rex dinosaur, and other members of the same family, and shows how calculations about size, speed, weight, etc. are .. show full overview

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