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