When did Horizon Season 2 Episode 19 air?
Horizon Season 2 Episode 19 aired on October 10, 1965.


Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
What sort of person can invent a 3-D microscope, a new way of photographing the moon, publish fifty papers on perception, and spend three weeks hunting for a minute sea creature to see how its eyes work? Cambridge psychologist Richard Gregory is a man of many facets. Tonight's film examines his inventiveness—its sources and its products. An M.R.C. team headed by Dr. D. G. Phillips has taken the first step towards answering the vital question: how do enzymes work?
Direct answers for episode-level questions and details.
Horizon Season 2 Episode 19 aired on October 10, 1965.
This episode runs for approximately 60 minutes.
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