Horizon Season 23 Episode release dates & where to watch

1. Are You a Racist?

Horizon presents a documentary about how white racists and black victims of racism volunteered to spend time in an isolated house living and talking about their prejudices.

2. Genesis

This Horizon episode is about the discovery of a molecular key which may literally unlock the mystery of life for all creatures.

3. Bitter Cold

Horizon presents a documentary on scientists who take themselves to Antarctica in 1980 to act as physical and mental guinea pigs.

4. The Mould, the Myth and the Microbe

Horizon explores the myth about the discovery of the antibiotic penicillin.

5. Outbreak: The Microbe Masters the Mould

In this episode, Horizon explores the question of when antibiotics were first developed it seemed infectious disease might be eliminated, so what has gone wrong?

6. Science...Fiction?

Horizon investigates the truths of science and it's theories.

7. The Children of Eve

Horizon explores at the latest discoveries about just where modern man came from.

8. The New Face of Leprosy

This episode of Horizon documents leprosy in the USA and India with a focus on medical developments for it's cure and control.

9. Hi-Tech à la Française

Horizon investigates the remarkable technological transformation of France over the last 25 years.

10. In the Wake of HMS Sheffield

Will the new strategies and weapons introduced because of the Falklands war be a match for the next generation of weapons? Horizon presents this documentary to answer that question.

11. AIDS: A Strange and Deadly Virus

Horizon looks at the virus that causes AIDS and the research into vaccines and drugs being developed to counteract the devastating disease of the immune system.

12. The Case of the Frozen Addict

In this documentary, Horizon reports on how doctors in America found that addicts using designer drugs developed Parkinson's Disease-like symptoms.

13. Nice Guys Finish First

In the interview by Horizon, Richard Dawkins discusses selfishness and cooperation, arguing that evolution often favours co-operative behaviour, and focusing especially on the tit for tat strategy of the prisoner's dilemma game.

14. The Men Who Bottled a Cow

This is an interesting Horizon presentation on decoys that look and smell like cows to the tsetse fly who carry a disease fatal to farm animals.

15. Twice Five Plus the Wings of a Bird

Horizon researches how we acquire mathematical abilities in the first place.

16. What Makes an Animal Smart?

This report by Horizon takes a look at the instinctive side of intelligence in animals that shows us that we owe more to instinct than we may care to think.

17. A Handful of Sugar with a Pinch of Salt

Horizon presents a simple, but effective, cure for diarrea in young children; sugar and salt.

18. Uranus Encounter

In this episode, Horizon brings you Voyager's encounter with Uranus and the mysteries that are being relayed back to the scientists.

19. Who Built Stonehenge?

Horizon presents an interview with Prof. C. Renfrew as he questions the accepted wisdom about the origins of Stonehenge in England.

21. Battered Baby: From Generation to Generation

This is the first part of a two-part series on battered children.

22. Battered Baby: Breaking the Chain

This is the second part of a two-part series on battered children.

23. Doctors to Be Finale

In a unique project, Horizon follows a group of medical students into the next century.