When did Horizon Season 4 Episode 11 air?
Horizon Season 4 Episode 11 aired on June 6, 1967.


Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
In this the first of two programmes dealing with cancer, Horizon looks at the intensive search now going on to discover whether a virus is one of the causes of cancer in humans and at the implications of this search in the treatment for such killer diseases as leukemia.
Direct answers for episode-level questions and details.
Horizon Season 4 Episode 11 aired on June 6, 1967.
This episode runs for approximately 60 minutes.
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