E1 - The Killer Dust

Aired: January 20, 1975

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

E2 - A Time to Be Born

Aired: January 27, 1975

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.

E3 - The Unsafe Sea

Aired: February 10, 1975

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

E4 - The Change of Life

Aired: February 17, 1975

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

E5 - Project Fido

Aired: February 24, 1975

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

E6 - The Planets

Aired: March 10, 1975

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.

E7 - The Long, Long Walkabout

Aired: April 07, 1975

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

E8 - The Overworked Miracle

Aired: April 14, 1975

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

E9 - Not the Cheapest, But the Best

Aired: April 21, 1975

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

E10 - A Spoonful of Roughage

Aired: April 28, 1975

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

E11 - Brain Poison

Aired: May 05, 1975

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

E12 - The Bulldog's Last Bark?

Aired: May 12, 1975

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.

E13 - Benjamin

Aired: May 19, 1975

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

E14 - The McMaster Experiment

Aired: June 02, 1975

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

E15 - The Glazed Outlook

Aired: June 09, 1975

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

E16 - The Three Chord Trick

Aired: June 16, 1975

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

E17 - The Cleanest Place in the World

Aired: June 23, 1975

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.

E18 - Strange Sleep

Aired: June 30, 1975

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

E19 - The Greatest Advance Since the Wheel?

Aired: July 07, 1975

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

E20 - How Do You Read?

Aired: July 14, 1975

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

E21 - The Sickly Sea

Aired: July 21, 1975

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

E22 - Happy Catastrophe

Aired: July 28, 1975

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

E23 - To Die, to Live - The Survivors of Hiroshima

Aired: August 04, 1975

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

E24 - Cannabis

Aired: August 11, 1975

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

E25 - Meditation and the Mind

Aired: August 18, 1975

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

E26 - The Trobriand Experiment

Aired: December 29, 1975

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