1990 - 4From Earth to Miranda Jan. 29, 1990- 1990 - 5Encounter With Neptune Feb. 05, 1990
- 1990 - 9Hurricane! Mar. 12, 1990
- 1990 - 11Cold Fusion Mar. 26, 1990
- 1990 - 13The Sharpest Shot of the Universe Apr. 09, 1990
- 1990 - 14The Company of Ants and Bees Apr. 23, 1990
- 1990 - 19Signs of Life Jun. 11, 1990
- 1990 - 20AIDS: A Quest for a Cure Jun. 25, 1990