James Lee Wong
Police Capt. Sam Street
Myra Ross
Olga Petroff / Countess Dubois / Sophie Dome
Devlin
Anton Mohl
Carl Roemer
Theodore Meisle
Christian Wilk
Simon Dayton
Russell
Tchin
Tommy
Mrs. Roemer
Lescardi (uncredited)
Ambulance Doctor (uncredited)
Chemistry Lab Director (uncredited)
Warehouse Man (uncredited)
John (uncredited)
Coroner (uncredited)
Wilk's Butler (uncredited)
Dock Worker (uncredited)