Dick Vosburgh credited as playing...
Capt. Larry Dart • Gen. Smith • Martian President • Prof. Zeffer • Venusian President • Mak • Robot • Robots • Cdr. Brog • Charlie • Dr. Brown • Saturnians • Scientist • 1st Martian colonist • Berridge • Doctor • Dr. Roberts • Dr. Smith • Duncan's assistant • Duty Officer • Gallia • Jackson • Jano • Katy • Kolig • Lead forger • Lizzie • Maj. Valla • Mall's assistant • Marog • Martian • Martian artist • Martian primitive • Neptunian • Newsreader • Riga • Saturnian Leader • Simba • Tara • Tirig • Venusian
