When did Horizon Season 12 Episode 18 air?
Horizon Season 12 Episode 18 aired on June 30, 1975.
Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 12 · Episode 18
Strange Sleep
Jun 30, 1975·1h
Horizon investigates the discovery of gaseous anaesthetic from 1840 until the early years of 20th century.
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Direct answers for episode-level questions and details.
How long is Horizon Season 12 Episode 18?
This episode runs for approximately 60 minutes.
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