Richard Vernon

Aged Professor

Sir Horace Mainwaring

Mr. Pott

Lord Dunstable

Suspect

Mr. Pott

Heraclius

Miriam's father

The General

The Earl of Swaffham

George

King

King

Colonel Hebron

Sir Nicholas Fanner

Dr. RIchard Payton

Sir Nicholss Fanner

Lord Brompton

The Marquess of Winchester

Mr. Garstanton

Roger Nettleton

Thompson

Duncan Anderson

Mr. Chessington

Sir Roland Hall

Uncle Felix

Brogan-Moore

Sir Edward Gait

Flewitt

Roland Tolhurst

(voice)

Makato

Slartibartfast

Slartibartfast

Quimby Charles

Sir John Hargreaves

Lord Bartlesham

C

Sir Geoffrey

Mr. Price

Mr. Becket

Fassbender

Major Toby Smith-Barton

Gentleman (uncredited)

Lord Bartlesham

Sir Maxwell Dean (archive footage)

George Cornfield

Col. Mathews

Sir Lionel Hibury

George Cornfield

Dr. Edwards

Sir Richard McKenzie

Dr Whitman

Stanley

Baldwin

Stanley

Sir Lionel Compton

Dr Whitman

Stoker Leishman

Colin

Alban Gascoyne

Thomas Ramsdale

Major Cochrane-Danby

Lord Tilling

Lewis

Sir Maxwell Dean

Sutherland

Admiral Croft

Andrew Coombes

Councilman

Mr. Price

Pa Stone

Chairman of the Board of Governors (uncredited)

Colonel

Sir Geoffrey Osborne

Colonel Loring

Professor Krempe

Colonel O'Dwyer

Lord Augustus Lorton

Edwin Oldenshaw

Professor Krempe

Sir Roger Wedgewood

Henry Gore-Browne

Raoul

Lord Hetherby

Oldenshaw

Sir Edward Seabrook

Race Course Official (uncredited)

Dr. Vivian

Lord Brisburn

Lord Oscar

Smithers

Man on Train

Roddinghead

Lord Willie Mounset

Government Official at Enquiry (uncredited)

Prime Minister

Johnnie Paxton

Sir John Ripwell

Dr. Aldrich

John Crewe

Mr Endworth

Pearson

The Major

Colonel Johnson

Parkinson

Lord Matterley

Charles Ormiston

Viney

Edgar Hargraves

Doctor at Crime Scene

Charles Lacey

Lessing

Manager

Under Secretary

Merchant

Leading man in play

Charles Pleydon, MP

Lewis

Sir Hector Rose

Mr. Pascoe

Mr. Fellowes

Brogan-Moore

Egeon