When did Horizon Season 4 Episode 1 air?
Horizon Season 4 Episode 1 aired on January 17, 1967.
Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 4 · Episode 1
Sons of Cain
Jan 17, 1967·1h
Horizon probes into whether aggressiveness is our birthright and can society live without violence?
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Direct answers for episode-level questions and details.
How long is Horizon Season 4 Episode 1?
This episode runs for approximately 60 minutes.
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