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