John Ritter Jack Tripper Actor Joyce DeWitt Janet Wood Actor Priscilla Barnes Terri Alden Actor Jenilee Harrison Cindy Snow Actor Don Knotts Ralph Furley Actor Alan McRae Guest Star Donald Petrie Guest Star Ed Gilbert Guest Star Dennis Robertson Guest Star Michael Ross Executive Producer Bernie West Executive Producer George Burditt Executive Producer Martin Rips Producer Joseph Staretski Producer George Sunga Producer Dave Powers Director Michael Baser Writer Kim Weiskopf Writer