- 1 Wildlife - The Last Great Battle
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
Air Date: 1971-01-04
- 2 Great Ormond Street
In this episode, Horizon looks at the renowned British hospital for children, Great Ormond Street, and the Institute of Child Health.
Air Date: 1971-01-18
- 3 A Bulldozer Through Heaven
Horizon explores the island of New Guinea and its cultural changes going on there.
Air Date: 1971-01-25
- 4 Rumors of War
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.
Air Date: 1971-02-01
- 5 I'm Dependent - You're Addicted
This episode investigates the facts about drug abuse and experimental work undertaken in this area.
Air Date: 1971-02-15
- 6 Kuru - To Tremble With Fear
Kuru is a unique disease of the people of New Guinea. Horizon goes with Prof. E. J. Field to find out why.
Air Date: 1971-02-22
- 7 Due to a Lack of Interest, Tomorrow Has Been Canceled
Horizon interviews ecologists that claim that man is irrevocably destroying its habitat.
Air Date: 1971-03-08
- 8 What Kind of Doctor?
Horizon investigates medical student training at the St. Thomas hospital in London, England.
Air Date: 1971-03-15
- 9 Nice Sort of Accident to Have
Horizon explores the causes, and looks for way to prevent car accidents
Air Date: 1971-03-22
- 10 The Wood
This report by Horizon looks at the long term ecological study of the forest at Wytham Wood, Oxon, in England.
Air Date: 1971-04-05
- 11 The Measure of a Man
In 1971, Horizon reviews the life and work of Prof. Hans Eysnck, the most controversial psychologists of the time.
Air Date: 1971-04-12
- 12 Three Score Years and Then?
This report by Horizon explores care for the aged, for both medical and welfare services in Britain.
Air Date: 1971-04-26
- 13 Darwin's Bulldog
Horizon reports on the famous protagonist of "The Origin of Species," Thomas Henry Huxley.
Air Date: 1971-05-03
- 14 The Secret
This episode of Horizon examines how cells organize to become complex organs, and bodies.
Air Date: 1971-05-10
- 15 What Every Girl Should Know
No description available
Air Date: 1971-05-17
- 16 Tastes of Food to Come
Horizon reports on food technology now experimenting with meat substitutes.
Air Date: 1971-05-24
- 17 Looking for a Happy Landing
No description available
Air Date: 1971-05-31
- 18 A Case of Depression
Horizon investigates how to treat depressive illneses.
Air Date: 1971-06-07
- 19 The Total War Machine
This episode of Horizon reports on the development of the aircraft bomber throughout periods of war.
Air Date: 1971-06-14
- 20 The Dinosaur Hunters
Horizon explores the field of palaeontology, the study of dinosaurs.
Air Date: 1971-06-21
- 21 Your Country Needs You
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.
Air Date: 1971-09-27
- 22 Rheumatism
Horizon investigates rheumatism, and looks at why this disease is under-researched.
Air Date: 1971-10-04
- 23 If at First You Don't Succeed...You Don't Succeed
Can new born babies solve complex problems? Horizon works with psychologists to see how they measure this capacity.
Air Date: 1971-10-11
- 24 One Liverpool or Two?
Do city planners in Liverpool have unrealistic expectations? Horizon looks into the development and planning process of Liverpool, England.
Air Date: 1971-10-18
- 25 Rutherford, Cavendish
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.
Air Date: 1971-10-25
- 26 The Fierce People
Horizon explores a primitive tribe of Yanomamo Indians living in southern Venezula.
Air Date: 1971-11-01
- 27 The Men Who Painted Caves
This episode of Horizon looks in the ancient cave paintings found in France.
Air Date: 1971-11-15
- 28 The Crab Nebula
This episode of Horizon reports on how the Crab Nebula was discovered, and continuing observation of the space encounter.
Air Date: 1971-11-22
- 29 Can Venice Survive?
Horizon reports on the continuing problem of the city of Venice, Italy sinking into the sea.
Air Date: 1971-11-29
- 30 Willingly to School
This report by Horizon is about Prof. Hean Piaget and her child center education theory.
Air Date: 1971-12-06
- 31 Periscope War
Horizon presents the history of the submarines, from pre-World War I to today's nuclear powered submarines.
Air Date: 1971-12-20
- 32 Patently Absurd
This episode of Horizon investigates strange new inventions.
Air Date: 1971-12-27