Strangers on a Train (1951)
Having met on a train, a smooth-talking psychotic socialite shares his theory on how two complete strangers can get away with murder to an amateur tennis player — a theory he plans to test out. infidelity, island, based on novel or book, perfect crime, psychopath, obsession, detective, suspicion, theory, carousel , lighter, gay interest, film noir, stalking, black and white, train, strangulation, double cross, amusement park, husband wife estrangement, chance meeting, cocktail party, fiancée, perfect murder, penn station, storm drain, tennis match, tennis pro, trains, murder swap
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