Boris Karloff

James Lee Wong

Marjorie Reynolds

Roberta 'Bobbie' Logan

Grant Withers

Capt. William Street

William Stelling

Dick Fleming

Catherine Craig

Cynthia Wentworth

Guy Usher

Paul Fleming

Henry Brandon

Attorney Victor Martin

Melvin Lang

Cyrus B. Wentworth

Wilbur Mack

Matthews

Kenneth Harlan

Ludlow

Richard Loo

Tong Leader

Tris Coffin

Mr. Baldwin - Adjuster (uncredited)

Gibson Gowland

Doctor (uncredited)

Jack Kennedy

Police Sgt. Casey (uncredited)

Bill Willmering

Det. Blake (uncredited)

Mike Donovan

Det. Mike

Maxine Leslie

Miss Reed - Secretary

Moy Ming

Aged Tong Member

Angelo Rossitto

Newsboy #3 in Montage

William Nigh

Director

Glenn Cook

Asistente de Dirección

Michael Jacoby

Guión, Guión Adaptado

Ralph Gilbert Bettison

Guión, Historia

Hugh Wiley

Guión, Personajes

Harry Neumann

Director de Fotografía

Edward J. Kay

Compositor de la Música Original, Música

Paul Malvern

Productor

Monogram Pictures

Compañía de Produccion

Charles J. Bigelow

Production Manager

Gordon Bau

Maquilladora

Robert Golden

Editor

Karl Zint

Sound Recordist