Miles Mander

as Major Cunningham

as Lockwood

as Sir Robert Bentley

as German Agent on Radio (voice) (uncredited)

as Leuwen Grayle

as Pleyel

as Gordon Druce

as Colonel Fitzhume (uncredited)

as Lord Wickham

as Judge Brisson

as Giles Conover

as Portmaster

as Wriothesley

as Lord Keith

as Levett

as Sir Frederick Fleet

as King Henry VI

as Businessman (uncredited)

as Malcolm Drake (uncredited)

as Fred Thomas

as Aramis

as Gordon Moore

as Deacon Arnold Foster

as Mr. Brigstock

as Homer

as Jukes

as Sir John Gresham

as Major Loring (uncredited)

as Weatherby (uncredited)

as Doctor (uncredited)

as Major

as Tom Armitage

as Dr. Kurt Immelman

as Benjamin Disraeli

as British Secretary

as Chief Inspector W.R. Allison

as Floyd Kirsten

Role: Writer

as Lord Warrick

as Cardinal Richelieu

as Lieut. Strope

Role: Dialogue

as Dr. Lockberg

as Dr. Marko

as Corey

as Dr. Leonard V. Meecham

as King Louis XIII

as Sir Hugo Boycott

as The Sparkler

as James V. Thorne

as Attorney General (uncredited)

as Professor Langer

as Col. Herman Fournier

as Armand de Marny

as Frederick Malone

as Kilpatrick

as Dr. Wilton

as Charles Seagrave

as James Stratton

as Mr. Charles Pryor

as Roger Smythe

as Over the Shoulder Reader

as Horace Granville

as Ebenezer Balfour

as Felze

as Garry Ames

as Dr. Rankin

as Capt. Ronald Dancy, DSO

Role: Director

as Harley Travers

as Paul Panois

as Captain Auguste Lutte

as Godfrey Norton

Role: Producer

as Hon Gerald Pillick

as Adolf Sperber

as Rollo Stevens

as Raymond Carteret

as Guy Merrow

as Capt. Gardner

as Bert

as Claude Holford

as Harry Tresham

as Ambatriadi

as Mr. Borwick

Role: Director

Role: Adaptation

Role: Director

as Mr. Rogan