Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 28 · Episode 2 ·
Keen as Mustard
This Horizon episode tells the story of the top secret experiments carried out to test the effects of mustard gas.
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Episode 2 of season 28 of Horizon: “Keen as Mustard”. Aired 1991-01-14. Watch it online free on ZapFlix.