A bad sneaky student switches Elroy's report tape with his own, which consists of 4 D's, a "F", and a "H", but Elroy's family doesn't believe him so he runs away with Astro and gets mixed up with a mob who's robbing a bank.
Casts:
George O'Hanlon, Penny Singleton, Daws Butler, Janet Waldo, Jean Vander Pyl, Don Messick, Mel Blanc, Frank Welker