Cast
Boris Karloff
James Lee Wong
William Gould
Theodore Meisle
Wilbur Mack
Russell
Lester Dorr
Coroner (uncredited)
Herbert Evans
Wilk's Butler (uncredited)
George Lloyd
Devlin
Lucien Prival
Anton Mohl
Hooper Atchley
Christian Wilk
John Hamilton
Simon Dayton
Lee Tung Foo
Tchin
Clancy Cooper
Warehouse Man (uncredited)
Grant Withers
Police Capt. Sam Street
John St. Polis
Carl Roemer
Ed Cassidy
Ambulance Doctor (uncredited)
Maxine Jennings
Myra Ross
Evelyn Brent
Olga Petroff / Countess Dubois / Sophie Dome
Lynton Brent
Tommy
Wheaton Chambers
Chemistry Lab Director (uncredited)