When did Horizon Season 23 Episode 13 air?
Horizon Season 23 Episode 13 aired on April 14, 1986.


Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
In the interview by Horizon, Richard Dawkins discusses selfishness and cooperation, arguing that evolution often favours co-operative behaviour, and focusing especially on the tit for tat strategy of the prisoner's dilemma game.
Direct answers for episode-level questions and details.
Horizon Season 23 Episode 13 aired on April 14, 1986.
This episode runs for approximately 60 minutes.
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