Horizon probes into the problems of obesity and investigates cures for obesity using diets and drugs.

A report by Horizon examining animal intelligence and looking at the reasons why no other animal has matched man in mental ability.

Horizon investigates the importance of the eye, diseases of the eye, and current research on sight.

In this episode, Horizon reports on how in the last 2 years, the desert locust has been breeding in Southern Arabia by the Red Sea.

Horizon reports on the problems associated with raising and educating children of very high intelligence.

This episode is a biography of the late professor J. B. S. Haldane whose life is described by his family, friends, and critics.

Horizon looks into music therapy used in the treatment of mental disorders.

This investigation by Horizon centers on the problems caused by venerial disease both in detection and cure.

Horizon investigates the problem of schizophrenia and discusses its causes and the ways in which it can be treated.

This report by Horizon examines the reason for a fall in the percentage of school children doing science.

This episode of Horizon is about advertising, looking at how it works and the application of scientific methods to persuade us to buy.

Horizon looks into what man has seen and done during 10 years of space exploration.

Horizon investigates new medical techniques to diagnose and treat unborn infants leading to a higher survival rate.

This episode of Horizon looks at the communication systems of animals.

Horizon investigates pollution problems in Britain with sewage and industrial wastes, and at the health risks associated with the pollution.

In this episode, Horizon examines our attempts to understand one of the oldest inhabitants of the sea, the shark.

Sebastian Z. de Ferranti gives the Royal Society lecture for 1969 on technological development.

The US spent $40 billion to put man on the moon, yet the real objectives of the space program remain obscure.

Horizon reports on the research being carried out in the fields of botany, astronomy, biochemistry, meteorology, and zoology.

The Honorable A. W. Benn addresses young art and technology students on the implications of increased technology.

The Honorable A. W. Benn addresses young art and technology students on the implications of increased technology.

In this episode, Horizon reports on the problems of pain, and the theory put forward that pain is closely connected with personality.

Horizon explores "man's best friend", the dog, and examines its origins and how its special relationship with men came about.

Horizon investigates surveys being carried out on British children to test Freud's theories.

In this episode, Roman Vishniac talks about his study of living things in their natural habitat as his life's work.

Horizon reports on the research into high-energy physics carried on at C.E.R.N. laboratory located near Geneva, Switzerland.

A report on current research into cancer and the subsequent knowledge and problems it brings.

Horizon investigates the limits of survival under extreme and normal enviromental conditions.

Horizon reports on the development of the Dutch nation's continuing fight against the encroachment of the sea.

Horizon investigates how drinking affects human behavior.

Horizon covers a simulated war game of a Middle East crisis, with different teams playing the roles of the major parties involved.

Horizon explores the problem of feeding the growing world population.

Horizon investigate the dilemma of whether a scientist should put his loyalty to mankind before his loyalty to his country.