Hobson (archive footage)

British Ambassador

Dr. Collins

The Judge

Burke

Mr. Harrington

Albert Hart

Sir Jacob Astley

Gen. St. John

Justice Bailey

Lord Carradine

Sir Richard Jeffcoate

Mr. Arundel

Gen. Crawley

Joe

David Lancaster

Cardinal Barberini

Inspector MacDonald

Brent

Group Capt. J.N. Stagg (uncredited)

Stonehouse

Superintendent Allen

Captain La Hire

Horton

Peregrinus

Man

Captain Joseph (Mutt) Summers, C.B.E.

Lord Boyne

Lt. Cdr. Sinclair

Supt. Roberts

Ken Wharton

Captain Tom Ashley, HMS Amesbury

Vincent Humphries

Sir Archibald Asher

Sir Richard Hannay

King Richard

Divisional Detective Inspector

Marcus Brutus

Leggatt

Bert, Adam's Friend (uncredited)

Detective at Cabby's Restaurant

Mr Bruce

Undetermined Role (uncredited)

Det. Insp. Alan Wembury

Designer

World Transport Official (uncredited)

Producer