Tondelayo
Mr. Harry Witzel
The Doctor
Mr. Langford
Skipper of the Congo Queen
The Reverend Dr. Roberts
Wilbur Ashley
Ted, First Mate of the Congo Queen
Jim Fish
Umeela
Darby
Mr. Worthing
Seaplane Pilot (uncredited)
Jim Benson (uncredited)
Native Singer (uncredited)
Native Prisoner (uncredited)
Native Drug Seller (uncredited)