When did Horizon Season 13 Episode 1 air?
Horizon Season 13 Episode 1 aired on January 5, 1976.


Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Horizon investigates heart transplant research and techniques perfected and currently used by Dr. Norman Shumway in Britain.
Direct answers for episode-level questions and details.
Horizon Season 13 Episode 1 aired on January 5, 1976.
This episode runs for approximately 60 minutes.
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