When did Horizon Season 6 Episode 25 air?
Horizon Season 6 Episode 25 aired on October 6, 1969.


Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Horizon explores "man's best friend", the dog, and examines its origins and how its special relationship with men came about.
Direct answers for episode-level questions and details.
Horizon Season 6 Episode 25 aired on October 6, 1969.
This episode runs for approximately 60 minutes.
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