Impressed by Chuck's chops on the harmonica, Laverne advises him to start a band. He does so with his co-workers from the Aero-Space Factory. With Laverne's help, can these misfits of science become a '60s rock and roll "mod" squad?

Cast: Penny Marshall, David L. Lander, Eddie Mekka, Leslie Easterbrook, Charles Fleischer, Jack Mack, Bob Perlow