Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 2 · Episode 20 ·
An Affair of the Heart
Horizon explores heart attacks and thrombosis.
24 episodes
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Episode 20 of season 2 of Horizon: “An Affair of the Heart”. Aired 1965-10-24. Watch it online free on ZapFlix.