Horizon Season 20 Episode release dates & where to watch

1. Sizewell Under Pressure

Horizon investigates if Britain should build a United States designed nuclear power station that uses a pressurized water reactor at its core.

2. The Tropical Time Machine

Horizon presents a report by Dr. Alison Jolly who discusses the country of Madagascar, just off of the west coast of Africa. Madagascar's ecology and conservation programs are in conflict with most third world economies.

3. The Geneva Event

Horizon brings you a report about the discovery of two new, and unimaginably short-lived, subatomic particles called "W" and "Z".

4. How Much Can You Drink?

Horizon examines some of the effects that moderate amounts of alcohol can have on the body.

5. Talking Turtle

In the Horizon documentary, we look new ways of using computers in classroom and to what effect computers in our schools will have in future.

6. What Little Girls are Made of

Horizon investigates the way girls and boys were taught science and related subjects at schools.

7. British Science - On the Wrong Track?

Horizon reports on the state of scientific research in Britain and the past blunders of the National Research Development Council.

8. The Great Plains Massacre

In this Horizon documentary, we look back at the event surrounding the near extermination of the North American bison (buffalo) in the 1880's.

9. Hard Rock

The Horizon episode is about the Carsington Aqueduct Scheme in Derbyshire, England, and the massive excavation problems encountered during construction.

10. Better Mind the Computer

Horizon presents a look at the current research into artificial computer intelligence.

11. Madness on Trial

Horizon looks at the mental problem of schizophrenia and how madness is medically diagnosed.

12. Sixty Minutes to Meltdown

In this episode, Horizon investigates the nuclear accident which took place in the United States at the Three Mile Island nuclear power plant during March 1979.

13. Killer in the Village

In this report, Horizon looks at the spread of the AIDS virus in the United States and their search for the cause and cure of the deadly disease.

14. The Case of ESP

n this documentary, Horizon investigates the power of the mind for psychic phenomena; telepathy, clairvoyance, precognition, and psychokinesis.

15. The Artificial Heart

Horizon investigates the current research into development and use of an artificial heart.

16. Dr. Priestley and the Breath of Life

This report by Horizon examines the experiments of Joseph Priestly on blood and oxygen in photosynthesis.

17. Professor Hawking's Universe

This episode of Horizon features Prof. Stephen Hawking and how he copes with his severe disability, his scientific career, and his relationship with his students.

18. The Cruel Choice

Horizon presents a discussion on the use of animals for experiments.

19. A Child's Guide to Languages

Looks at different ways of teaching a foreign language and contrasts them with the way babies and young children pick up their native language, without formal teaching.

20. China's Child

Horizon examines how the government of China presents the "one child per family" population policy to the people.

21. The Earthquake Connection

Horizon investigates today's research into earthquakes and the usefulness of the findings.

22. Prisoner or Patient?

Horizon presents this documentary on how Britain deals with its mentally ill criminal offenders.

23. Cancer: The Pattern in the Genes

In this report, Horizon outlines the latest research into cancer with specific reference to oncogenes.

24. The Academy Finale

Horizon follows group of men and women going through basic training in Federal Bureau of Investigation (FBI) methods at the Academy in the United States.