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)

Joseph Henabery