When did Horizon Season 18 Episode 20 air?
Horizon Season 18 Episode 20 aired on October 26, 1981.
Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 18 · Episode 20
Butterflies or Barley?
Oct 26, 1981·1h
Horizon reports on the conflict between the farmers and the conservationists over the English countryside.
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How long is Horizon Season 18 Episode 20?
This episode runs for approximately 60 minutes.
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