When did Horizon Season 6 Episode 17 air?
Horizon Season 6 Episode 17 aired on May 1, 1969.


Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
In this episode, Horizon examines our attempts to understand one of the oldest inhabitants of the sea, the shark.
Direct answers for episode-level questions and details.
Horizon Season 6 Episode 17 aired on May 1, 1969.
This episode runs for approximately 60 minutes.
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