The 27th Day (1957)

Aliens take 5 people, give them small capsules which can kill mankind without additional damage, with the understanding they will colonize Earth only if they use the weapons.

William Asher

Director

Mel Welles

as Russian Marshal (uncredited)

George Antheil

Actor

Werner R. Heymann

Actor

Irvin Ashkenazy

as 2nd Man (uncredited)

Gene Barry(1919-2009)

as Jonathan Clark

Charles Bennett

as Gorki (uncredited)

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