When did Horizon Season 26 Episode 13 air?
Horizon Season 26 Episode 13 aired on April 17, 1989.


Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Horizon presents a biography of the philosopher Ludwig Wittgenstein who lived from 1889 to 1951.
Direct answers for episode-level questions and details.
Horizon Season 26 Episode 13 aired on April 17, 1989.
This episode runs for approximately 60 minutes.
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