While holidaying on board a cruise liner, Columbo helps capture the killer of the singer with the ship’s band.

Blaming Cooper for the death of his brother, Jean Renault plots his revenge as the eccentric FBI agent prepares to leave Twin Peaks.

Cooper attempts to locate Laura’s killer after the discovery of another victim.

Ben receives an unwelcome surprise, Norma’s mother arrives in Twin Peaks with a new husband, and Bob covers his tracks.