John Sutton

as Harry

as Peter Halliday

as Superintendent Walker

as Herbert Guiles

as Lord Donegall

as Warner, the Chauffeur

as Insp. Beecham

as Shaw

as The Actor as 'Tom' in Stage Play

as Daniel Catlin

as Harvey Bristol

as Tom Wickers

as Ambrose Ashley

as Captain Luis del Toro

as Hilary Evans

as Duke de Valdac

as Khalid

as Ira

as Anthony Tunliffe

as Jerry Allison

as Keith Ferris

as Raizul

as Prince Bisceglie

as Cecil Graham

as The Duke of Buckingham

as Ted Whitney

as Jeff MacAllister

as Count de Brissac

as Diego De Silva

as Phil Dexter

as Roger Hetherton

as Dr. Rivers

as Geoffrey Carter

as Peter Stackhouse

as Howard Shelton

as Fred Haviland

as Dr. Phillip Rossiter

as Wing Commander Morley

as Dr. Franklin Meredith

as Lord Edward Crewe

as Richard Jeffery

as Captain of the Guard

as David Wallace

as Boston

as Dr. Frank Griffin

as Bill Banning

as John Wyatt

as Capt. Armand of the Queen's Guard (uncredited)

as Inspector Tredennis

as Corporal Piggott

as Hessian Courier (uncredited)

as Adjutant

as Inspector Tredennis

as Man at Newsstand (uncredited)

as Fred Percy

as English Officer

as Drake

as Doctor

as Nielson's Secretary

as Sanger

as Ship's Passenger (uncredited)

as Young Man

as Tom Wickers