Dr. Zolok
Bruce Gordon
Natcha Manyus
Dr. Manyus
Hugo
Jerry Delaney
Gorzo
Appollon
Butterfield (as George Hayes)
Dr. Colton
Prof. Reynolds
Andrews
Sheik Ben Ali
Queen Rama
Boyo - a Giant [Chs. 1-2, 10-12] (uncredited)
Scientist [Ch. 1] (uncredited)
Arab Henchman (uncredited)
Army General (uncredited)
Scientist (uncredited)
Gendarme (uncredited)