as Mr Horrobin

as Monty Clayton

as Sir Montague Corner

as Chilwell

as Lord Redesdale

as Chartermain

as Dickie Melborne

as Peter Montrose ("Murder at Midnight")

as Stanley

as Tarquin

as Colonel

as Maj. Daintry

as Colonel Hall

as Gus Ashley

as Philip Crane

as Coroner

as Jarvis

as Colonel Wright

as Belton

as The Lawyer

as Hugh

as Jack Newton

as Lomax

as Hindsmith

as Captain Douglas

as Adrian Beresford

as Ian Osborn Utley

as Major Cranmore

as Colonel Scuttling - Scotland Yard Man

as Wilkins

as Det. Thompson

as Immigration Officer

as Mr. Ballard

as German Technical Examiner

as George Aisgill

as Garsden

as Mr MacBryde

as Major Donald Ross

as Cavendish

as Jenkins

as Housemaster

as Mr. Eccles

as Member of Whitehall Conference

as Smythe

as Dr. Fisher

as Bodley

as Sylvan-Jones

as Superintendent Symington

as Randolph St. John

as Da Silva

as Wilkie (uncredited)

as Col. Hannerly

as Maj. Baker

as Captain Patterson

as Lord Melford

as Webster

as Capt. Eric Simpson

as Lacey Marshalt

as Capt. Christopher Connaught-Smith

as Sexton

as Captain

as British Lieutenant

as Philip

as George Aisgill

as Foley

as Police Inspector

as Brigadier's Staff Officer

as Guards Officer

as Chailey

as Dr. Stevenson

as Captain Donaldson

as Vice-Admiral

as Clifford

as First Gentleman

as Det. Inspector

as Jonathan Redgrove

as Colonel Packham

as Henry Carmichael

as Billy

as Malbete

as Lt. Col. Henniker