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On what should be a routine rescue mission during World War II, the submarine USS Tiger Shark picks up three survivors of a U- boat attack. But for the crew -- trapped together in the sub's narrow corridors and constricted spaces -- the unexpected visitors seem to spark a series of chilling, otherworldly occurrences! Starring Hollywood favorites Olivia Williams (THE SIXTH SENSE, THE POSTMAN), Bruce Greenwood (THIRTEEN DAYS, DOUBLE JEAPOARD), and Matt Davis (LEGALLY BLONDE, BLUE CRUSH).