Calificación
Reparto

Bruce Bennett
Patrick Norris

Florence Rice
Lola Hobbs

Barton MacLane
Sam O'Donnell

Joe Downing
Lou Boyd

Joseph Crehan
Police Chief Hobbs

Howard Hickman
Dr. Talbot

Edward Van Sloan
Prof. Holtz

P.J. Kelly
Prof. Cordet

Don Beddoe
Maj. Blaine

William Forrest
Mr. Brooks

Danton Ferrero
Mr. DeSoto

George Anderson
Detective Bennett

Duke York
Joe Carpa

Eddie Laughton
Henchman Bishop

George Magrill
Henchman Scarlatti

Cy Schindell
Henchman Felton