O Segredo do Monstro

James Ellison

Robert Curtis

Heather Angel

Helga Hammond

John Howard

Oliver Hammond

Bramwell Fletcher

Dr. Jeff Colbert

Heather Thatcher

Conita 'Christy' Christopher

Aubrey Mather

Inspector Craig

Halliwell Hobbes

Walton the Butler

Matthew Boulton

Coroner (uncredited)

Harry Carter

Warren (uncredited)

Alec Craig

Will the Groundsman (uncredited)

Douglas Gerrard

Jury Foreman (uncredited)

Holmes Herbert

Chief Constable (uncredited)

Eily Malyon

Mrs. Walton (uncredited)

Charles McGraw

Strud Strudwick (uncredited)

Clive Morgan

Foster (uncredited)

John Rogers

Tom Clagpool (uncredited)