Witness for the Prosecution (1957)

When Leonard Vole is arrested for the sensational murder of a rich, middle-aged widow, the famous Sir Wilfrid Robarts agrees to appear on his behalf. Sir Wilfrid, recovering from a near-fatal heart attack, is supposed to be on a diet of bland, civil suits—but the lure of the criminal courts is too much for him, especially when the case is so difficult.