NOVA/Season Four

Season Four of NOVA premiered on January 5, 1977.

Episodes

#	#	Title	Airdate
51	1	Hitler's Secret Weapon	January 5, 1977
52	2	The Hot Blooded Dinosaurs	January 12, 1977
53	3	What Price Coal?	January 19, 1977
54	4	The Sunspot Mystery	February 2, 1977
55	5	The Plastic Prison	February 9, 1977
56	6	Incident at Brown's Ferry	February 23, 1977
57	7	Bye Bye Blackbird	March 2, 1977
58	8	The Pill for the People	March 9, 1977
59	9	The Gene Engineers	March 16, 1977
60	10	The Human Animal	March 23, 1977
61	11	The Wolf Equation	March 30, 1977
62	12	The Dawn of the Solar Age	April 20, 1977
63	13	The Business of Extinction	April 20, 1977
64	14	The Red Planet	April 27, 1977
65	15	Tongues of Men (1)	May 11, 1977
66	16	Tongues of Man (2)	May 18, 1977
67	17	Linus Pauling: Crusading Scientist	June 1, 1977
68	18	Across the Silent Barrier	June 22, 1977
69	19	The New Healers	June 29, 1977