Calificación
Reparto

Boris Karloff
James Lee Wong

Grant Withers
Police Capt. Sam Street

Maxine Jennings
Myra Ross

Evelyn Brent
Olga Petroff / Countess Dubois / Sophie Dome

George Lloyd
Devlin

Lucien Prival
Anton Mohl

John St. Polis
Carl Roemer

William Gould
Theodore Meisle

Hooper Atchley
Christian Wilk

John Hamilton
Simon Dayton

Wilbur Mack
Russell

Lee Tung Foo
Tchin

Lynton Brent
Tommy

Grace Wood
Mrs. Roemer

Frank Bruno
Lescardi (uncredited)

Ed Cassidy
Ambulance Doctor (uncredited)