January 20, 1975 9:00 pm
This investigative report by Horizon covers an investigation into the deaths of people who inhaled asbestos dust at Acre Mill, Yorkshire, England.
January 27, 1975 9:00 pm
Horizon investigates the growing tendency in hospitals in Britain to induce childbirth by injecting the hormone oxytocin into expectant mothers.
February 10, 1975 9:00 pm
This episode of Horizon examines the problems of ship safety in the English Channel.
February 17, 1975 9:00 pm
Horizon investigates the symptoms of menopause and the various degrees in which it occurs.
February 24, 1975 9:00 pm
This episode of Horizon shows the peril to man of the ever increasing dog population in the western world.
April 7, 1975 9:00 pm
This report by Horizon covers an investigation by a group of Australian scientists that looks into the origins and history of the Australian Aborigines.
April 14, 1975 9:00 pm
This report by Horizon describes the resistance to antibiotics, fast growing in all countries, and the dangers it could mean for the future.
April 21, 1975 9:00 pm
Horizon investigates the life and work of the great engineer, Isambard Kingdom Brunel.
April 28, 1975 9:00 pm
Horizon explores the effect of fibre in diet on the diseases of western world.
May 5, 1975 9:00 pm
Horizon presents an investigation into the effects on health of lead in the urban atmosphere.
May 12, 1975 9:00 pm
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.
May 19, 1975 9:00 pm
This episode of Horizon follows the progress of Benjamin Pile, born on 22 November, 1974, at Oxford in Britain.
June 2, 1975 9:00 pm
This report by Horizon covers an experiment at McMaster University Medical School, in Ontario, Canada.
June 9, 1975 9:00 pm
Horizon investigates the attempts by the University of Newcastle in England to define and create an ideal living and working environment.
June 16, 1975 9:00 pm
Horizon explores the psychology of music, as it explains why music has such a powerful emotive effect in every society.
June 23, 1975 9:00 pm
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.
June 30, 1975 9:00 pm
Horizon investigates the discovery of gaseous anaesthetic from 1840 until the early years of 20th century.
July 7, 1975 9:00 pm
Horizon reports on the history of superconductivity, from discovery, to the present.
July 14, 1975 9:00 pm
In this documentary, Horizon reports on the reading process; how it works for the fluent, and how it should be taught.
July 21, 1975 9:00 pm
This episode of Horizon describes the various aspects of the pollution problem of the Mediterranean Sea.
July 28, 1975 9:00 pm
In this Horizon episode, Rene Thom's mathematical discovery of the catastrophe theory is investigated.
August 4, 1975 9:00 pm
This documentary by Horizon commemorates the dropping of the A-bomb on Hiroshima, Japan on August 6, 1945.
August 11, 1975 9:00 pm
Horizon takes a look at the history of cannabis and the research on the effects of smoking marijuana.
August 18, 1975 9:00 pm
This is a report by Horizon on Transcendental Meditation, or TM, brought to the West by the Maharishi Mahesh Yogi.
December 29, 1975 9:00 pm
This documentary by Horizon is about the Trobriand islanders, whose culture is based on the Kula, a communication system of giving and receiving.