TV-G | 30min | Comedy, Drama, Family, Music, TV Series | Episode aired 29 April 1964 After Patty is put in charge of the school prom she poses as Cathy in order to get Cathy's old school friend, who has become a pop star, to perform at the dance. Director: Stanley Prager Writers: Arnold Horwitt, Sidney Sheldon, William Asher Stars: Patty Duke, William Schallert, Jean Byron