Pedro
Joshua Lambert
Mark Adams
Chilion
1st Lt. Corona
Professor Zeiner
Jake (uncredited)
Larry Devon
2nd Communications Man
Mallory
Wilson
Dr. Armand Zola / Worker (voice) (archive footage)
Gunman (uncredited)
Hunter
Crewman (uncredited)
Newscaster
Jack Thomas
Absalom
Andy Rivers
Policeman
Dirk Shuster
Self
Bernard Kincaide
Dr. Zola / Worker (voice)
P.A. Announcer (voice)
Gentz
Floyd Gaines
Dr. Johnny Windhurst