When did Horizon Season 18 Episode 15 air?
Horizon Season 18 Episode 15 aired on April 13, 1981.


Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Horizon presents the second episode of a two part documentary on NASA's unmanned Voyager 1 spacecraft and the data it has sent back from the planets Jupiter and Saturn.
Direct answers for episode-level questions and details.
Horizon Season 18 Episode 15 aired on April 13, 1981.
This episode runs for approximately 60 minutes.
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