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Stagecoach (1939)
Never a bad guess to go with a John Wayne movie. Hint added.
Diabolique
hint added
The Third Man (1949)
Are you sure your TV is not black and white? geeez! Judgment at Nuremberg (1961) ;)
Dr. Strangelove
The Spy Who Came in from the Cold (1965)
The Longest Day
Lord of the Flies