Horizon Season 15 Episode release dates & where to watch

1. Living Machines

Horizon investigates how biologists and engineers are pooling their ideas to understand how nature's machines work.

2. A Land for All Reasons

In this episode, Horizon examines the need for an objective approach to land management in Britain.

3. I Don't Want to Be a Burden

Horizon explores community and residential services available to the elderly in South Hampton, England.

4. Zero G

Horizon presents a report on zero gravity and the effects of weightlessness in spacecraft on humans.

5. The Message in the Rocks

Develops the theory that four and a half thousand million years ago the earth was formed thanks to the explosion of a huge star which provided the rocks, the minerals and the radioactivity from which life developed. These theories are based partly on analysis of a meteorite which dropped near a village in Mexico at the beginning of the seventies.

6. The Eddystone Lights

Horizon reports on last three attempts to build a lighthouse on the Eddystone Rocks, near Plymouth.

7. Light of the 21st Century

Horizon presents a documentary on the development of the Light Amplification by Stimulated Emission of Radiation device, or more commonly know as the Laser.

8. The New Breadline

Horizon investigates the reasons for poverty in Britain today, now with seven million on at the poverty line.

9. Now the Chips Are Down

About the applications and implications for the future, particularly the effects on the labour market, of microprocessors.

10. Explosions in the Mind

In this episode, Horizon explores the after effects of a stroke when there is a sudden stoppage of blood to the human brain.

11. One Small Step

Horizon investigates the race to the moon between the USA and Russia and questions the motives behind the space race.

12. The Tsetse Trap

This episode of Horizon is about the tsetse fly which rules most of Africa and why much of the fertile land can't in Africa can't be used because of the dangerous insect.

13. A Whisper From Space

Horizon explores the history of evidence used to support the Big Bang Theory of the creation of the universe.

14. Prisoners of Hope

In this episode, Horizon explains some of the research in multiple sclerosis and how the lives of MS sufferers are affected.

15. On a Different Track

Horizon presents a brief history of the French railways and the policy behind their future direction.

16. Careering into Science

This documentary by Horizon is about six school children taking 'O' levels exams and inter science in Britain.

17. Cashing in on the Ocean

Horizon looks at the implications of exploiting Manganese nodules which are scattered over the seabed.

18. Bags of Life

Horizon investigates the composition and structure of the membrane that surround individual cells.

19. Innocent Slaughter?

In this documentary, Horizon examines all sides of the Canadian Harpseal hunt issue and asks if it is really necessary.

20. The Beersheva Experiment

Horizon explores an experimental medical school in Israel where students are trained primarily to care for people.

21. Divers Do It Deeper

Horizon explores the years of research that have enabled divers to go to greater and greater ocean depth.

22. The Big Sleep

In this story, Horizon takes a look at the world's leading hibernation research projects.

23. The Vital Spark

In this episode, Horizon examines the current developments in electrotherapy.

24. The Red Deer of Rhum Finale

Horizon takes a look at the changing behaviour of individual animals in a herd of red deer on the Isle of Rhum.