Air date: 1975-01-20

Runtime: 60 min

This investigative report by Horizon covers an investigation into the deaths of people who inhaled asbestos dust at Acre Mill, Yorkshire, England.

Air date: 1975-01-27

Runtime: 50 min

Investigates the growing tendency in hospitals to induce childbirth by injecting hormones into mothers. The practice has become increasingly widespread in recent years, and this film asks if induction is desirable, necessary, and safe.

Air date: 1975-02-10

Runtime: 60 min

This episode of Horizon examines the problems of ship safety in the English Channel.

Air date: 1975-02-17

Runtime: 60 min

Horizon investigates the symptoms of menopause and the various degrees in which it occurs.

Air date: 1975-02-24

Runtime: 60 min

This episode of Horizon shows the peril to man of the ever increasing dog population in the western world.

Air date: 1975-03-10

Runtime: 60 min

By the end of 1974, Mars, Venus, Mercury and Jupiter had all been visited by spacecraft. For the first time scientists saw in sharp detail the continents, mountains, valleys and volcanoes of other worlds. Tonight's programme shows how these geological features give clues to the way the planets evolved; how they have helped scientists in their attempt to reach back 5,000 million years to understand the formation of the solar system itself.

Air date: 1975-04-07

Runtime: 60 min

This report by Horizon covers an investigation by a group of Australian scientists that looks into the origins and history of the Australian Aborigines.

Air date: 1975-04-14

Runtime: 60 min

This report by Horizon describes the resistance to antibiotics, fast growing in all countries, and the dangers it could mean for the future.

Air date: 1975-04-21

Runtime: 60 min

Horizon investigates the life and work of the great engineer, Isambard Kingdom Brunel.

Air date: 1975-04-28

Runtime: 60 min

Horizon explores the effect of fibre in diet on the diseases of western world.

Air date: 1975-05-05

Runtime: 60 min

Horizon presents an investigation into the effects on health of lead in the urban atmosphere.

Air date: 1975-05-12

Runtime: 60 min

This is a Horizon report on the building of the British military deterrent from the first decision to make it in 1941 until the present state of lethargy.

Air date: 1975-05-19

Runtime: 60 min

This episode of Horizon follows the progress of Benjamin Pile, born on 22 November, 1974, at Oxford in Britain.

Air date: 1975-06-02

Runtime: 60 min

This report by Horizon covers an experiment at McMaster University Medical School, in Ontario, Canada.

Air date: 1975-06-09

Runtime: 60 min

Horizon investigates the attempts by the University of Newcastle in England to define and create an ideal living and working environment.

Air date: 1975-06-16

Runtime: 60 min

Horizon explores the psychology of music, as it explains why music has such a powerful emotive effect in every society.

Air date: 1975-06-23

Runtime: 60 min

This report by Horizon brings you scientists that are using Antarctica as a giant natural lab to study who has polluted Earth most; man or nature.

Air date: 1975-06-30

Runtime: 60 min

Horizon investigates the discovery of gaseous anaesthetic from 1840 until the early years of 20th century.

Air date: 1975-07-07

Runtime: 60 min

Horizon reports on the history of superconductivity, from discovery, to the present.

Air date: 1975-07-14

Runtime: 60 min

In this documentary, Horizon reports on the reading process; how it works for the fluent, and how it should be taught.

Air date: 1975-07-21

Runtime: 60 min

This episode of Horizon describes the various aspects of the pollution problem of the Mediterranean Sea.

Air date: 1975-07-28

Runtime: 60 min

In this Horizon episode, Rene Thom's mathematical discovery of the catastrophe theory is investigated.

Air date: 1975-08-04

Runtime: 60 min

This documentary by Horizon commemorates the dropping of the A-bomb on Hiroshima, Japan on August 6, 1945.

Air date: 1975-08-11

Runtime: 60 min

Horizon takes a look at the history of cannabis and the research on the effects of smoking marijuana.

Air date: 1975-08-18

Runtime: 60 min

This is a report by Horizon on Transcendental Meditation, or TM, brought to the West by the Maharishi Mahesh Yogi.

Air date: 1975-12-29

Runtime: 60 min

This documentary by Horizon is about the Trobriand islanders, whose culture is based on the Kula, a communication system of giving and receiving.