cast
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Frank Buck
Frank Hardy
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Sasha Siemel
Tiger Van Dorn
-
Reginald Denny
Ralph Marshall
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Esther Ralston
Valerie Shields
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Charlotte Henry
Dorothy Elliott
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William Bakewell
Tom Banning
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Clarence Muse
Lightning
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Willie Fung
Chiang-Houseboy
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LeRoy Mason
Jim Murphy
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Matthew Betz
Inspector Starrett
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Richard Tucker
Robert Banning
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Duncan Renaldo
Armand Roget
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Fred Kohler Jr.
John Charles
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Sherwood Bailey
Paul Marshall
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Harry 'Snub' Pollard
Campbell
- George Rosener Professor
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Gertrude Sutton
Mrs. Maitland
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John St. Polis
Chandler Elliott
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John Davidson
Doctor Coleman
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Milburn Morante
Singapore Joe
- Dirk Thane Joe Nolan
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Robert Warwick
Angus MacLeod
- Dahlam Ali Hardy's Assistant
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Jim Corey
Henchman
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Paul Ellis
Greenway
- Henry Hale Jackson
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Harry Harvey
Roget Clerk #1
- Reed Howes Sailor
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Jack Ingram
Undercover Detective at Dive
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Tom London
Detective Interrogating Pete
- Merrill McCormick Peters
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Blackie Whiteford
Henchman
-
Roger Williams
Henchman