Leo Gorcey
— 'Slip' Mahoney
Huntz Hall
— 'Sach' Jones
Patrick O'Moore
— Alfie Grimshaw
Rudolph Anders
— Dr. Goebbel
Bernard Gorcey
— Louie Dumbrowsky
David Gorcey
— Chuck
Benny Bartlett
— Butch
Harry Cording
— Henchman Shanks
Eric Snowden
— Trader Holmes
Woody Strode
— Malaka, head bearer
Laurette Luez
— Anaka
Joel Fluellen
— Rangori, witch doctor
Murray Alper
— Max Lomax
Pat Flaherty
— Police Officer Flaherty
Emory Parnell
— Police Captain
John Harmon
— Police Scientist
Roy Glenn
— Chief Mutawa
Emil Sitka
— Helpful Riverboat Crewman
Clint Walker
— Tarzan