1991-01-07: Sudden Death
1990-06-25: AIDS: A Quest for a Cure
1990-06-11: Signs of Life
1990-06-04: The Child Mothers
1990-05-21: Do Cows Make You Mad?
1990-05-14: Legacy of a Volcano
1990-04-30: The Intelligent Island
1990-04-23: The Company of Ants and Bees
1990-04-09: The Sharpest Show of the Universe
1990-04-02: The Quake of '89 - The Final Warning?
1990-03-26: Cold Fusion
1990-03-19: The Britannic Greenhouse
1990-03-12: Hurricane!
1990-03-05: The 10,000 Year Test
1990-02-19: The First 14 Days
1990-02-12: Guess What's Coming to Dinner?
1990-02-05: Encounter with Neptune
1990-01-29: From Earth to Miranda
1990-01-22: Food Irradiation: Would You Buy It?
1990-01-15: Medicine 2000
1989-06-26: Time of Darkness
1989-06-19: Newpin: A Lifetime