as

Self (archive footage)

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

Lord Redesdale

as

Gus Ashley

as

Philip Crane

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

Geoffrey Plunstead

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

George Sykes, MP

as

Mr McBryde

as

Cavendish

as

Rupert Bryce

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

Det. Supt. Cowley

as

Lord Melford

as

Webster

as

Colonel Stevens

as

Capt. Eric Simpson

as

Lacey Marshalt

as

Capt. Christopher Connaught-Smith

as

Sexton

as

Captain

as

British Lieutenant

as

Philip

as

Det. Supt. Cowley

as

Lacey Marshalt

as

Det. Supt. Cowley

as

Cheif Supt. Symington

as

Garsden

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