Calificación
Reparto

Donald Meek
Dr. Crabtree

John Hamilton
Insp. Carr

Robert Middlemass
Boris Seminoff

Thelma Tipson
Dolly Demarest

Walter Fenner
Ian Stevens

Jane Bramley
Mae Norton

Frank McNellis
Monitor Man (uncredited)

Harry Tyler
Assistant Director (uncredited)

Herschel Mayall
Medical Examiner (uncredited)