Congo Bill
Lureen / Ruth Culver
Cameron
Bernie MacGraw
Andre Bocar
Dr. Greenway
Kleeg
Zalea
Morelli
Kahla
Villabo
Ivan
Rogan
Tom MacGraw
Gorilla (uncredited)
Blinky [Ch. 3] (uncredited)
Mel - assistant lion tamer [Ch. 1] (uncredited)
Nagoo - Witch Doctor (uncredited)
Narrator (uncredited)
Frank, Cafe Clerk (uncredited)
Torturer [Chs. 8 & 9] (uncredited)
Tonata (uncredited)
Circus Henchman [Ch. 1] (uncredited)