James Stephenson
British Military Intelligence Agent
Hans Heinrich von Twardowski
Helldorf
Frederick Burton
U.S. District Court Judge
Louis Adlon
Nazi American Youth Leader (uncredited)
Fred Aldrich
Nazi at Bund Meeting (uncredited)
Sherwood Bailey
Newsboy at End (uncredited)
Ward Bond
American Legionnaire (uncredited)
Walter Bonn
Naval Officer Seeing Renard at Seaplane (uncredited)
Egon Brecher
Fritz Muller - German Agent (uncredited)
Tommy Bupp
Shoeshine Boy (uncredited)
Glen Cavender
Man in Montage Stuffing Mailboxes (uncredited)
John Conte
Radio Announcer (voice) (uncredited)
Alec Craig
McGregor - Scottish Postman (uncredited)
Jimmie Dundee
Nazi Goon at Bund Meeting (uncredited)
Frederick Giermann
German-American at Bund Meeting (uncredited)
Lisa Golm
Mrs. Anna Westphal (uncredited)
Sol Gorss
Nazi Goon at Bund Meeting (uncredited)
Fred Graham
American Legionnaire at Bund Meeting (uncredited)
John Harron
Man in Montage with Propaganda (uncredited)
Adolf Hitler
Self (archive footage) (uncredited)
Max Hoffman Jr.
Soldier at Renz's Arrest (uncredited)
Arthur Stuart Hull
U.S. Government Agent (uncredited)
Selmer Jackson
Customs Official (uncredited)
Robert Emmett Keane
Harrison - Passport Official (uncredited)
Milton Kibbee
Man Greeting Waiter Bill (archive footage) (uncredited)
Martin Kosleck
Joseph Goebbels (uncredited)
Frank Mayo
FBI Agent Phillips (uncredited)
Ray Miller
Bill - Coffee Shop Proprietor (uncredited)
Walter Miller
Bill - Waiter with Coffee (uncredited)
Jack Mower
FBI Agent 'Mac' MacDonald (uncredited)
George Offerman, Jr.
Western Union Messenger (uncredited)
Lotte Palfi Andor
Kassel's Nurse (uncredited)
Steve Pendleton
Naval Courier (uncredited)
Gil Perkins
Goebbels' Aide (uncredited)
Norman Phillips Jr.
Gottfried Simmons - Nazi Youth (uncredited)
Otto Reichow
Driver of Nazi Car That Crashed (uncredited)
John Ridgely
Army Hospital Clerk (uncredited)
Hans Schumm
Bismarck Officer with Crew List (uncredited)
Charles Sherlock
FBI Agent Fred Young (uncredited)
Edwin Stanley
U.S. Official (uncredited)
Robert R. Stephenson
Fritz - von Eichen's Aide (uncredited)
Regis Toomey
Tom - in Coffee Shop (uncredited)
Frederic Tozere
FBI Agent Staunton (uncredited)
Charles Trowbridge
Maj. Williams (uncredited)
Emmett Vogan
Hotel Desk Clerk (uncredited)