Cast 20
Boris Karloff
Mr. James Lee Wong
Marjorie Reynolds
Roberta 'Bobbie' Logan
Grant Withers
Police Capt. Bill Street
Huntley Gordon
Mr. Davidson
George Lynn
Capt. Guy Jackson
William Royle
Capt. Jaime
James Flavin
Police Sgt. Jerry
Lotus Long
Princess Lin Hwa
Lee Tung Foo
Willie
Bessie Loo
Lilly May
Ernie Stanton
Bailey
I. Stanford Jolley
Palisser Hotel Clerk
Jack Kennedy
Sgt. Brady
Donald Kerr
Taxi Driver
Wilbur Mack
The Coroner
Moy Ming
Aged Tong Member
Bruce Mitchell
Police Officer at Explosion
Angelo Rossitto
Mute Dwarf
Guy Usher
Police Commissioner
Richard Loo
Tong Chief
Crew 9
William Nigh
Director
Scott Darling
Screenplay
Hugh Wiley
Characters
William T. Lackey
Producer
Edward J. Kay
Music
Harry Neumann
Director of Photography
Russell F. Schoengarth
Editor
Charles J. Bigelow
Production Manager
W.B. Eason
Assistant Director