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