"Mystery and adventure, surrounding a stolen rubber harvest."
Frank Buck
as Frank Hardy
Sasha Siemel
as Tiger Van Dorn
Reginald Denny
as Ralph Marshall
Esther Ralston
as Valerie Shields
Charlotte Henry
as Dorothy Elliott
William Bakewell
as Tom Banning
Clarence Muse
as Lightning
Willie Fung
as Chiang-Houseboy
LeRoy Mason
as Jim Murphy
Matthew Betz
as Inspector Starrett
Richard Tucker
as Robert Banning
Duncan Renaldo
as Armand Roget
Fred Kohler Jr.
as John Charles
Sherwood Bailey
as Paul Marshall
Harry 'Snub' Pollard
as Campbell
George Rosener
as Professor
Gertrude Sutton
as Mrs. Maitland
John St. Polis
as Chandler Elliott
John Davidson
as Doctor Coleman
Milburn Morante
as Singapore Joe
Dirk Thane
as Joe Nolan
Robert Warwick
as Angus MacLeod
Dahlam Ali
as Hardy's Assistant
Jim Corey
as Henchman
Paul Ellis
as Greenway
Henry Hale
as Jackson
Harry Harvey
as Roget Clerk #1
Reed Howes
as Sailor
Jack Ingram
as Undercover Detective at Dive
Tom London
as Detective Interrogating Pete
Merrill McCormick
as Peters
Blackie Whiteford
Roger Williams
George Melford
Director
Harry L. Fraser
George Magrill
Stunts
Screenplay
Harry O. Hoyt
Sherman L. Lowe
George M. Merrick
Arthur Hoerl
Dallas M. Fitzgerald
Eddie Parker
Earl Turner
Editor
Carl Mathews
Louis Weiss
Producer
Gordon Griffith
Edward Linden
Director of Photography
Corson Jowett
Sound
Lee Zahler
Original Music Composer
Herman Schopp
T.T. Triplett
