When did NOVA Season 9 Episode 4 air?
NOVA Season 9 Episode 4 aired on January 31, 1982 at 9 PM ET.


PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and technology, and highlights the people involved in scientific pursuits.
One of the biggest investigations in medical history began when a mysterious killer disease broke out during independence celebrations in Philadelphia in 1976: Legionnaires' disease. NOVA traces the search for a cause and cure—a search bedeviled by false trails, accusations of incompetence and cover-up, and increasing urgency as the death toll mounted.
Direct answers for episode-level questions and details.
NOVA Season 9 Episode 4 aired on January 31, 1982 at 9 PM ET.
This episode runs for approximately 55 minutes.
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