Horizon · SEASON 10
An Element of Mystery
Episode 30 · 1973-12-03

- Documentary
Episode overview
This episode of Horizon documents the sources, uses, and properties of the element mercury and examines its role in modern society.
60 minutes
Season 10 episodes
1. Epidemic1973-01-04
2. Worlds in Collision1973-01-11
3. The Military Necessity1973-01-18
4. The Curtain of Silence1973-01-25
5. Crime Lab1973-02-01
6. When the Breeding Has to Stop1973-02-08
7. Science Is Dead, Long Live Science1973-02-15
8. ...And Where Will the Children Play?1973-03-01
9. Acupuncture: A Chinese Puzzle1973-03-08
10. What Time Is Your Body?1973-03-22
11. Survival of the Weakest1973-04-05
12. Red Sea Coral and the Crown of Thorns1973-04-12
13. Lumbered... with Back-Ache!1973-04-26
14. Airport1973-05-03
15. Do You Remember the Memory Man?1973-05-17
16. What a Waste!1973-05-24
17. The Laws of the Land1973-06-07
18. Do We Really Need the Railways?1973-06-14
19. The Telly of Tomorrow?1973-06-21
20. How Does It Hurt?1973-07-05
21. A Scientist Looks at Religion1973-08-09
22. In Search of Konrad Lorenz1973-09-24
23. Stretch Up Tall1973-10-01
24. Gilding the Lily1973-10-08
25. The Black Holes of Gravity1973-10-15
26. What's so Big About Us?1973-10-22
27. The Steadfast Tin Soldier1973-10-29
28. Carry on Smoking1973-11-05
29. Air Crash Detective1973-11-26
30. An Element of Mystery1973-12-03
31. Digging Up the Future1973-12-17
32. Kula, a Reason for Giving1973-12-24