Dudley Foster

as Heather

as Jonathan

as Grimthorpe

as Mr. Mayhew

as Inspector Hook

as Symes

as Chief Supt. Vyvyan

as Heather

as Grimshaw

as Darkly

as Federman

as Darkly

as Mr. Green

as Hector Kenley

as Leo

as Whitsun

as Caven

as Blueskin

as James Hughes

as Home Secretary

as Supt. Carter

as Philip Teasdale

as Major Thursby-Byers

as Mr. Paggot

as Kirill

as Peter Dexter

as Jones

as Detective Sergeant Keirnan

as Mr. Goat

as Parker

as Gestapo Agent (uncredited)