When did Horizon Season 10 Episode 21 air?
Horizon Season 10 Episode 21 aired on August 9, 1973.


Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
This report by Horizon examines the work of Sir Alister Hardy who has set up a research unit to examine religious experience.
Direct answers for episode-level questions and details.
Horizon Season 10 Episode 21 aired on August 9, 1973.
This episode runs for approximately 60 minutes.
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