A London bank clerk (director/star Ralph Richardson) goes missing for 24 hours and turns up with no memory of where he was. When the police label him a suspect in a local club robbery and the murder of a worker there, Richardson must try to remember what happened to him...and if he could have committed the crime. Compelling British suspenser also stars Margaret Leighton, Jack Hawkins. AKA: "Murder on Monday." Standard; Soundtrack: English.