When did Horizon Season 23 Episode 2 air?
Horizon Season 23 Episode 2 aired on January 13, 1986.


Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
This Horizon episode is about the discovery of a molecular key which may literally unlock the mystery of life for all creatures.
Direct answers for episode-level questions and details.
Horizon Season 23 Episode 2 aired on January 13, 1986.
This episode runs for approximately 60 minutes.
Comments coming soon
Discuss episodes with other viewers