When did Horizon Season 3 Episode 21 air?
Horizon Season 3 Episode 21 aired on November 21, 1966.
Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 3 · Episode 21
Sex-Change?
Nov 21, 1966·1h
Doctors and psychologists talk about the problems inherent in the determination of sex.
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Direct answers for episode-level questions and details.
How long is Horizon Season 3 Episode 21?
This episode runs for approximately 60 minutes.
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