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