Oil Spill (S27E1)
1/8/1990
Medicine 2000 (S27E2)
1/15/1990
Food Irradiation: Would You Buy It? (S27E3)
1/22/1990
From Earth to Miranda (S27E4)
1/29/1990
Encounter With Neptune (S27E5)
2/5/1990
Guess What's Coming to Dinner? (S27E6)
2/12/1990
The First 14 Days (S27E7)
2/19/1990
The 10,000 Year Test (S27E8)
3/5/1990
Hurricane! (S27E9)
3/12/1990
The Britannic Greenhouse (S27E10)
3/19/1990
Cold Fusion (S27E11)
3/26/1990
The Quake of '89 - The Final Warning? (S27E12)
4/2/1990
The Sharpest Shot of the Universe (S27E13)
4/9/1990
The Company of Ants and Bees (S27E14)
4/23/1990
The Intelligent Island (S27E15)
4/30/1990
Legacy of a Volcano (S27E16)
5/14/1990
Do Cows Make You Mad? (S27E17)
5/21/1990
The Child Mothers (S27E18)
6/4/1990
Signs of Life (S27E19)
6/11/1990
AIDS: A Quest for a Cure (S27E20)
6/25/1990
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