1. Poison in the Rockies
Aired: Jan 9, 1990 Poison in the Rockies is focused on the damage that decades of mining operati...
2. Race for the Top
Aired: Jan 23, 1990 Using some of the largest machines ever built on earth, American and European...
3. Disguises of War
Aired: Feb 6, 1990 Sixty-five years after attempts to ban them, chemical weapons pose more of a ...
4. The Bomb's Lethal Legacy
Aired: Feb 13, 1990 NOVA examines an alarming nuclear waste problem at the Hanfrod Nuclear Reserv...
5. The Big Spill
Aired: Feb 27, 1990 The 1989 Exxon Valdez oil spill takes a center stage when NOVA heads to Alask...
6. The Genius That Was China: Rise of the Dragon
Aired: Mar 20, 1990 China in the 13th century was the richest, most powerful, most technologicall...
7. The Genius That Was China: Empires in Collision
Aired: Mar 27, 1990 NOVA examines the extraordinary transformation that propelled Europe outward ...
8. The Genius That Was China: The Threat from Japan
Aired: Apr 3, 1990 Ever wonder how junk mail finds you? NOVA investigates the hidden world of di...
9. The Genius That Was China: Will the Dragon Rise Again?
Aired: Apr 10, 1990 NOVA covers China's long road to economic and technological equality with the...
10. The KGB, the Computer and Me
Aired: Oct 2, 1990 Astronomer-turned-computer system administrator Clifford Stoll discovers a ha...
11. Neptune's Cold Fury
Aired: Oct 9, 1990 NOVA visits Neptune, the planet that took Voyager 12 years to reach. Mysterie...
12. To Boldly Go...
Aired: Oct 16, 1990 NOVA chronicles the Voyager space mission—from Earth to the ends of the solar...
13. Poisoned Winds of War
Aired: Oct 23, 1990 Sixty-five years after attempts to ban them, chemical weapons pose more of a ...
14. The Blimp Is Back!
Aired: Oct 30, 1990 NOVA examines the troubled past and promising future of blimps, zeppelins, cy...
15. Earthquake!
Aired: Nov 6, 1990 NOVA looks at the high-stakes quest to predict earthquakes. Despite past disa...
16. Killing Machines
Aired: Nov 13, 1990 Robotic weapons that seek out and destroy ships, planes, and other targets ar...
17. Can the Elephant Be Saved?
Aired: Nov 20, 1990 Is the ivory ban in the elephant's best interest? NOVA looks at the controver...
18. We Know Where You Live
Aired: Nov 27, 1990 Ever wonder how junk mail finds you? NOVA investigates the hidden world of di...
19. In the Land of the Llamas
Aired: Dec 4, 1990 NOVA profiles the llama, alpaca, vicuna and guanaco of South America. At one ...
20. What's Killing the Children?
Aired: Dec 18, 1990 NOVA tracks a mysterious disease that suddenly and fatally attacks the childr...