Edward G. Robinson

Edward 'Ed' Renard

Francis Lederer

Kurt Schneider

George Sanders

Franz Schlager

Paul Lukas

Dr. Kassell

Henry O'Neill

Attorney Kellogg

Dorothy Tree

Hilda Kleinhauer

Lya Lys

Erika Wolf

Grace Stafford

Mrs. Schneider

James Stephenson

British Military Intelligence Agent

Hedwiga Reicher

Mrs. Kassell

Joe Sawyer

Werner Renz

Sig Ruman

Krogman

Lionel Royce

Hintze

Henry Victor

Wildebrandt

Hans Heinrich von Twardowski

Helldorf

Wolfgang Zilzer

Westphal

Frederick Vogeding

Captain Richter

Willy Kaufman

Greutzwald

Rudolph Anders

Captain Straubel

Wilhelm von Brincken

Captain von Eichen

George Rosener

Klauber

Frederick Burton

U.S. District Court Judge

Eily Malyon

Mrs. McLaughlin

Bodil Rosing

Passenger on Boat

John Deering

Narration by

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)

Jack Egger

(uncredited)

Frederick Giermann

German-American at Bund Meeting (uncredited)

Lisa Golm

Mrs. Anna Westphal (uncredited)

Sol Gorss

Nazi Goon at Bund Meeting (uncredited)