After losing out on a big raise, George gets "compensation" from Mr. Spacely with tickets to an outer space theme park. There, the family go on various rides and attend a flea circus. Afterward, the Moon fleas escape on Astro and seek sanctuary with the Jetsons because their ringleader mistreats them.
Elenco: Jean Vander Pyl , Janet Waldo , George O'Hanlon , Penny Singleton , Daws Butler , Don Messick , Mel Blanc , Frank Welker , Tony Pope , Avery Schreiber , Frank Welker , Ruth Buzzi , Allan Lurie , Dick Beals , Chick Vennera , Gregg Berger , Phil Hartman , Lorenzo Music .