E1 - Wildlife - The Last Great Battle

Aired: January 04, 1971

In this episode, Horizon looks a the efforts of zoos to save animal species from extinction by breeding enough to ensure their survival in captivity

E2 - Great Ormond Street

Aired: January 18, 1971

In this episode, Horizon looks at the renowned British hospital for children, Great Ormond Street, and the Institute of Child Health.

E3 - A Bulldozer Through Heaven

Aired: January 25, 1971

Horizon explores the island of New Guinea and its cultural changes going on there.

E4 - Rumors of War

Aired: February 01, 1971

This episode of Horizon looks at the growing arsenal of nuclear weapons over the last 25 years and the effects it has on the arms race.

E5 - I'm Dependent - You're Addicted (I)

Aired: February 15, 1971

The first of a two-programme investigation in which Horizon and Man Alive have combined forces. This episode investigates the facts about drug abuse and experimental work undertaken in this area.

E6 - Kuru - To Tremble with Fear

Aired: February 22, 1971

Kuru is a unique disease of the people of New Guinea. Horizon goes with Prof. E. J. Field to find out why.

E7 - Due to a Lack of Interest, Tomorrow Has Been Canceled

Aired: March 08, 1971

Horizon interviews ecologists that claim that man is irrevocably destroying its habitat.

E8 - What Kind of Doctor?

Aired: March 15, 1971

Horizon investigates medical student training at the St. Thomas hospital in London, England.

E9 - A Nice Sort of Accident to Have

Aired: March 22, 1971

Horizon explores the causes, and looks for way to prevent car accidents

E10 - The Wood

Aired: April 05, 1971

This report by Horizon looks at the long term ecological study of the forest at Wytham Wood, Oxon, in England.

E11 - The Measure of Man

Aired: April 12, 1971

In 1971, Horizon reviews the life and work of Prof. Hans Eysnck, the most controversial psychologists of the time.

E12 - Three Score Years and Then?

Aired: April 26, 1971

This report by Horizon explores care for the aged, for both medical and welfare services in Britain.

E13 - Darwin's Bulldog

Aired: May 03, 1971

Horizon reports on the famous protagonist of "The Origin of Species," Thomas Henry Huxley.

E14 - The Secret

Aired: May 10, 1971

This episode of Horizon examines how cells organize to become complex organs, and bodies.

E15 - What Every Girl Should Know

Aired: May 17, 1971

At the moment, legal abortions in the UK are being performed at the rate of over 90,000 a year and it is considered that the number is likely to rise. But why are so many people not prepared to use contraceptives? Are the contraceptives themselves at fault or is it part of a deep-rooted attitude to sex? A drug is now being tested which makes it possible for a woman to procure her own abortion in the first few weeks of pregnancy.

E16 - Tastes of Foods to Come

Aired: May 24, 1971

Horizon reports on food technology now experimenting with meat substitutes.

E17 - Looking for a Happy Landing

Aired: May 31, 1971

Within 20 years vertical take-off airliners could be hovering over Hampstead and Dulwich before landing, one a minute, day and night, at a Thames-side V-port. Horizon looks at what could be one of the great environmental debates of the century to have, or not to have, aircraft flying in and out of city centres.

E18 - A Case of Depression

Aired: June 07, 1971

Horizon investigates how to treat depressive illneses.

E19 - The Total War Machine

Aired: June 14, 1971

This episode of Horizon reports on the development of the aircraft bomber throughout periods of war.

E20 - The Dinosaur Hunters

Aired: June 21, 1971

Horizon explores the field of palaeontology, the study of dinosaurs.

E21 - Your Country Needs You?

Aired: September 27, 1971

This episode of Horizon looks at Britain's civil defense program, and to see if it is adequate in the event of a nuclear war.

E22 - Rheumatism

Aired: October 04, 1971

Horizon investigates rheumatism, and looks at why this disease is under-researched.

E23 - If at First You Don't Succeed... You Don't Succeed

Aired: October 11, 1971

Can new born babies solve complex problems? Horizon works with psychologists to see how they measure this capacity.

E24 - One Liverpool or Two?

Aired: October 18, 1971

Do city planners in Liverpool have unrealistic expectations? Horizon looks into the development and planning process of Liverpool, England.

E25 - Rutherford / The Cavendish Today

Aired: October 25, 1971

This is a two part episode of Horizon. First, Horizon looks at the life of centenary Ernest Rutherford, followed by a report of the Cavendish Labratory in Cambridge, England.

E26 - The Fierce People

Aired: November 01, 1971

Horizon explores a primitive tribe of Yanomamo Indians living in southern Venezula.

E27 - The Men Who Painted Caves

Aired: November 15, 1971

This episode of Horizon looks in the ancient cave paintings found in France.

E28 - The Crab Nebula

Aired: November 22, 1971

This episode of Horizon reports on how the Crab Nebula was discovered, and continuing observation of the space encounter.

E29 - Can Venice Survive?

Aired: November 29, 1971

Horizon reports on the continuing problem of the city of Venice, Italy sinking into the sea.

E30 - Willingly to School?

Aired: December 06, 1971

This report by Horizon is about Prof. Hean Piaget and her child center education theory.

E31 - The Periscope War

Aired: December 20, 1971

Horizon presents the history of the submarines, from pre-World War I to today's nuclear powered submarines.

E32 - Patently Absurd

Aired: December 27, 1971

This episode of Horizon investigates strange new inventions.