To hide from overzealous fans, a popular rock group (one of the members was Richie's childhood friend) is staying at the Cunningham house, but Richie can't tell anyone that they're there. This poses a problem for Richie because nobody believes he actually knows them.
Elenco: Marion Ross , Tom Bosley , Anson Williams , Henry Winkler , Erin Moran , Ron Howard , Al Molinaro , Don Most , Scott Baio , Ted McGinley , Cathy Silvers .