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A U.S. Navy submarine captain tries to prevent the Soviets from trying to launch World War III.

Stuart Whitman
Captain Welch

Persis Khambatta
Sylvia Kruger

Angus Scrimm
Soviet Destroyer Captain

Leon Askin
Martin Beck
C.I.A. Man - Berlin
Emile Beaucard
Soviet Sub Exec

Paul Mantee

Paul Comi
b.g. miller

Robert Clarke

Simmy Bow
Duncan McLeod
Harvey Vernon

Bart Braverman