Season 4 poster

Season 4

19 episodes January 5, 1977

Episodes

1 Hitler's Secret Weapon Jan 5, 1977 No ratings 2 The Hot Blooded Dinosaurs Jan 12, 1977 No ratings 3 What Price Coal? Jan 19, 1977 No ratings 4 The Sunspot Mystery Feb 2, 1977 No ratings 5 The Plastic Prison Feb 9, 1977 No ratings 6 Incident at Brown's Ferry Feb 23, 1977 No ratings 7 Bye Bye Blackbird Mar 2, 1977 No ratings 8 The Pill for the People Mar 9, 1977 No ratings 9 The Gene Engineers Mar 16, 1977 No ratings 10 The Human Animal Mar 23, 1977 No ratings 11 The Wolf Equation Mar 30, 1977 No ratings 12 The Dawn of the Solar Age Apr 20, 1977 No ratings 13 The Business of Extinction Apr 20, 1977 No ratings 14 The Red Planet Apr 27, 1977 No ratings 15 Tongues of Men (1) May 11, 1977 No ratings 16 Tongues of Men (2) May 18, 1977 No ratings 17 Linus Pauling: Crusading Scientist Jun 1, 1977 No ratings 18 Across the Silent Barrier Jun 22, 1977 No ratings 19 The New Healers Jun 29, 1977 No ratings