When did Horizon Season 21 Episode 12 air?
Horizon Season 21 Episode 12 aired on April 16, 1984.


Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Horizon presents the first of a two-part documentary about Kenneth Bianchi, the Los Angeles Hillside Strangler, who was convicted of the murder of 12 women even though his defence was that he had no memory of the crimes.
Direct answers for episode-level questions and details.
Horizon Season 21 Episode 12 aired on April 16, 1984.
This episode runs for approximately 60 minutes.
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