Leo Gorcey

as 'Slip' Mahoney

Huntz Hall

as 'Sach' Jones

Patrick O'Moore

as Alfie Grimshaw

Rudolph Anders

as Dr. Goebbel

Bernard Gorcey

as Louie Dumbrowsky

David Gorcey

as Chuck

Benny Bartlett

as Butch

Harry Cording

as Henchman Shanks

Eric Snowden

as Trader Holmes

Woody Strode

as Malaka, head bearer

Laurette Luez

as Anaka

Joel Fluellen

as Rangori, witch doctor

Murray Alper

as Max Lomax

Pat Flaherty

as Police Officer Flaherty

Emory Parnell

as Police Captain

John Harmon

as Police Scientist

Roy Glenn

as Chief Mutawa

Emil Sitka

as Helpful Riverboat Crewman

Clint Walker

as Tarzan