Synopsis by Hal Erickson
Once again hoping to strike it rich with the least amount of effort, Lucy (Lucille Ball) tries to win an ongoing radio contest. The winner of the grand prize is required to identify the "mystery sound", and thus Lucy and Viv (Vivian Vance) experiment with a variety of noises in hopes of making the correct guess. Somehow or other the story winds up at the radio station with Lucy manning the deejay board. Future One Day at a Time costar Pat Harrington Jr. appears as Gordon Felson in this, the final episode of The Lucy Show's third season.