Alec Guinness appears as a man who finds himself face to face with an identical double in a pub. They could be brothers. One character, “Barratt,” works as a French instructor at a British university; his counterpart is a local aristocrat struggling financially. The two men have drinks together and then spend the night in the aristocrat’s hotel room. When "Barratt" awakens, his roommate has vanished. Shortly after, a…