When did Horizon Season 4 Episode 12 air?
Horizon Season 4 Episode 12 aired on June 20, 1967.
Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 4 · Episode 12
Cancer - The Smoker's Gamble
Jun 20, 1967·1h
Why is there doubt in so many people's minds about the relationship between lung cancer and smoking? Tonight's programme examines the latest scientific evidence in detail.
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How long is Horizon Season 4 Episode 12?
This episode runs for approximately 60 minutes.
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