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Hedy Lamarr as Tondelayo |
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Walter Pidgeon as Mr. Harry Witzel |
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Frank Morgan as The Doctor |
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Richard Carlson as Mr. Langford |
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Reginald Owen as Skipper of the Congo Queen |
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Henry O'Neill as The Reverend Dr. Roberts |
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Bramwell Fletcher as Wilbur Ashley |
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Clyde Cook as Ted, First Mate of the Congo Queen |
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Leigh Whipper as Jim Fish |
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Oscar Polk as Umeela |
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Darby Jones as Darby |
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Richard Ainley as Mr. Worthing |
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Jim Davis as Seaplane Pilot (uncredited) |
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John Burton as Jim Benson (uncredited) |
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Delos Jewkes as Native Singer (uncredited) |
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Martin Wilkins as Native Prisoner (uncredited) |
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Ed Allen as Native Drug Seller (uncredited) |
| Directing | Richard Thorpe | Director |
| Sound | Bronislau Kaper | Original Music Composer |
| Camera | Harry Stradling Sr. | Director of Photography |
| Writing | Leon Gordon | Screenplay |
| Writing | Ida Vera Simonton | Novel |
| Editing | Fredrick Y. Smith | Editor |
| Production | Victor Saville | Producer |
| Writing | Leon Gordon | Theatre Play |
| Sound | Daniele Amfitheatrof | Original Music Composer |
| Art | Cedric Gibbons | Art Direction |
| Art | Edwin B. Willis | Set Decoration |
| Costume & Make-Up | Jack Dawn | Makeup Designer |
| Directing | Al Jennings | Assistant Director |
| Camera | Clarence Sinclair Bull | Still Photographer |
