Blackout (1954)

Casey (Dane Clark), a U.S. Army veteran living in London, is nearly broke and drowning his sorrows in booze. But then he meets Phyllis (Belinda Lee), a stunning blonde with money to spare who offers Casey cash to marry her. Suspicious but with nothing to lose, Casey agrees, only to wake up the next day hungover, confused and in a stranger's room with blood on his coat. Phyllis is nowhere to be seen -- except in the newspapers. It turns out her father was murdered, and all clues point to Casey.