When did Horizon Season 9 Episode 5 air?
Horizon Season 9 Episode 5 aired on February 7, 1972.
Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 9 · Episode 5
The Day it Rained Periwinkles
Feb 7, 1972·1h
Horizon investigates reports of strange phenomena and about what the scientific theory is about these phenomena.
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How long is Horizon Season 9 Episode 5?
This episode runs for approximately 60 minutes.
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