When did Horizon Season 24 Episode 20 air?
Horizon Season 24 Episode 20 aired on June 8, 1987.
Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 24 · Episode 20
The Riddle of the Joints
Jun 8, 1987·1h
Report on research into rheumatoid arthritis.
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Direct answers for episode-level questions and details.
How long is Horizon Season 24 Episode 20?
This episode runs for approximately 60 minutes.
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