Russell Napier

as Dr Stephen Lewis

as Sir Harold Plant

as Dr. Green

as Professor Fuller

as Leeds

as Landlord

as Colonel Thompson

as Headmaster

as Narrator

as Flag Captain

as Brother Elias

as 2nd Plain Clothes Officer

as Superintendent

as Thompson

as Air Vice Marshal (uncredited)

as Squire Myles

as Potter

as Capt. Stanley Lord

as Parker

as Banker Green

as Inspector Duggan

as Admiral Habberfield

as Inspector Duggan

as Detective Sgt. Bolton

as Inspector Hobson

as Scotland Yard Supt. Davidson

as Jack Burns

as Sir Henry Dimmock

as Raymond Curtis

as Inspector Simmons

as Supt. John Harrington

as Insp. Durham

as Insp. Treherne

as Wg. Cmr. Rogers

as Inspector Harmer

as Detective at Ann's Apartment (Uncredited)

as Col. Stafford

as Inspector Markham

as Inspector Duggan

as Det. Cutler

as Stevens

as Supt. Walshaw

as Narrator