Horizon: Season 20 (1983)

Horizon investigates if Britain should build a United States designed nuclear power station that uses a pressurized water reactor at its core.

Horizon presents a report by Dr. Alison Jolly who discusses the country of Madagascar, just off of the west coast of Africa. Madagascar's ecology and conservation programs are in conflict with most third world economies.

Horizon brings you a report about the discovery of two new, and unimaginably short-lived, subatomic particles called "W" and "Z".

Horizon examines some of the effects that moderate amounts of alcohol can have on the body.

In the Horizon documentary, we look new ways of using computers in classroom and to what effect computers in our schools will have in future.

Horizon investigates the way girls and boys were taught science and related subjects at schools.

Horizon reports on the state of scientific research in Britain and the past blunders of the National Research Development Council.

In this Horizon documentary, we look back at the event surrounding the near extermination of the North American bison (buffalo) in the 1880's.

The Horizon episode is about the Carsington Aqueduct Scheme in Derbyshire, England, and the massive excavation problems encountered during construction.

Horizon presents a look at the current research into artificial computer intelligence.

Horizon looks at the mental problem of schizophrenia and how madness is medically diagnosed.

In this episode, Horizon investigates the nuclear accident which took place in the United States at the Three Mile Island nuclear power plant during March 1979.

In this report, Horizon looks at the spread of the AIDS virus in the United States and their search for the cause and cure of the deadly disease.

n this documentary, Horizon investigates the power of the mind for psychic phenomena; telepathy, clairvoyance, precognition, and psychokinesis.

Horizon investigates the current research into development and use of an artificial heart.

This report by Horizon examines the experiments of Joseph Priestly on blood and oxygen in photosynthesis.

This episode of Horizon features Prof. Stephen Hawking and how he copes with his severe disability, his scientific career, and his relationship with his students.

Horizon presents a discussion on the use of animals for experiments.

Looks at different ways of teaching a foreign language and contrasts them with the way babies and young children pick up their native language, without formal teaching.

Horizon examines how the government of China presents the "one child per family" population policy to the people.

Horizon investigates today's research into earthquakes and the usefulness of the findings.

Horizon presents this documentary on how Britain deals with its mentally ill criminal offenders.

In this report, Horizon outlines the latest research into cancer with specific reference to oncogenes.

Horizon follows group of men and women going through basic training in Federal Bureau of Investigation (FBI) methods at the Academy in the United States.