James Lee Wong
Boris Karloff
Roberta 'Bobbie' Logan
Marjorie Reynolds
Tong Leader
Richard Loo
Mr. Baldwin - Adjuster (uncredited)
Tris Coffin
Doctor (uncredited)
Gibson Gowland
Police Sgt. Casey (uncredited)
Jack Kennedy
Det. Blake (uncredited)
Bill Willmering
Det. Mike
Mike Donovan
Miss Reed - Secretary
Maxine Leslie
Aged Tong Member
Moy Ming
Newsboy #3 in Montage
Angelo Rossitto
Capt. William Street
Grant Withers
Dick Fleming
William Stelling
Cynthia Wentworth
Catherine Craig
Paul Fleming
Guy Usher
Attorney Victor Martin
Henry Brandon
Cyrus B. Wentworth
Melvin Lang
Matthews
Wilbur Mack
Ludlow
Kenneth Harlan
Director
William Nigh
Producer
Paul Malvern
Editor
Robert Golden
Sound Recordist
Karl Zint
Director of Photography
Harry Neumann
Makeup Artist
Gordon Bau
Music
Edward J. Kay
Screenplay
Michael Jacoby
Assistant Director
Glenn Cook
Production Manager
Charles J. Bigelow
Story
Ralph Gilbert Bettison
Characters
Hugh Wiley