When did Horizon Season 14 Episode 20 air?
Horizon Season 14 Episode 20 aired on October 21, 1977.
Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 14 · Episode 20
The Rhine's Revenge
Oct 21, 1977·1h
Horizon presents the story of how the river Rhine has defended itself against progress.
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Direct answers for episode-level questions and details.
How long is Horizon Season 14 Episode 20?
This episode runs for approximately 60 minutes.
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