Synopsis by Hal Erickson
Seth Hazlitt (William Windom arranges for Cabot Cove to stage a rock concert benefit to save a local patch of woods. The star of the concert is Tommy Vaughn (Keith Coulouris), a popular singer who is anything but popular to the people who work for him. Inevitably, a murder occurs, with an electric guitar as the weapon. Jessica (Angela Lansbury) plays a few detection riffs herself to find out which of the dead man's many enemies is the guilty party.