NOVA — Season 4

E01 Hitler's Secret Weapon 05 Jan 1977 E02 The Hot-Blooded Dinosaurs 12 Jan 1977 E03 What Price Coal? 19 Jan 1977 E04 The Sunspot Mystery 02 Feb 1977 E05 The Plastic Prison 09 Feb 1977 E06 Incident at Brown's Ferry 23 Feb 1977 E07 Bye Bye Blackbird 02 Mar 1977 E08 The Pill for the People 09 Mar 1977 E09 The Gene Engineers 16 Mar 1977 E10 Sociobiology : The Human Animal 23 Mar 1977 E11 The Wolf Equation 30 Mar 1977 E12 The Dawn of the Solar Age 20 Apr 1977 E13 The Business of Extinction 20 Apr 1977 E14 The Red Planet 27 Apr 1977 E15 The Tongues of Men : Disaster at Babel (1) 11 May 1977 E16 The Tongues of Men : A World Language? (2) 18 May 1977 E17 Linus Pauling: Crusading Scientist 01 Jun 1977 E18 Across the Silent Barrier 22 Jun 1977 E19 The New Healers 29 Jun 1977