- Charles Laughton
- Albert Lory
- Maureen O'Hara
- Louise Martin
- George Sanders
- George Lambert
- Walter Slezak
- Major Erich von Keller
- Kent Smith
- Paul Martin
- Una O'Connor
- Emma Lory
- Philip Merivale
- Professor Sorel
- Thurston Hall
- Mayor Henry Manville
- George Coulouris
- Prosecutor
- Nancy Gates
- Julie Grant
- Ivan F. Simpson
- Judge
- John Donat
- Edmund Lorraine
- Philip Ahlm
- German Second Lieutenant
- Frank Alten
- Captain Schwartz
- Louis V. Arco
- German Sergeant
- John Banner
- German Sergeant
- Joan Barclay
- Young Woman
- Trevor Bardette
- Courtroom Guard Who Brings Albert's Notes
- Linda Bieber
- Emily
- Tommy Bond
- Pug-nosed School Bully
- Sven Hugo Borg
- German Soldier
- Leo Bulgakov
- Little Fat Man
- Bobby Burns
- Courtroom Spectator
- George M. Carleton
- Mr. Noble
- Wheaton Chambers
- Mr. Lorraine
- Gordon B. Clarke
- First Lieutenant
- Albert D'Arno
- German Soldier
- John Dilson
- Mayor's Secretary
- Ludwig Donath
- German Captain
- Margaret Fealy
- Old Woman
- Hans Fuerberg
- Kurt
- Babe Green
- Undetermined Role
- Ernest Grooney
- Priest
- Mary Halsey
- Girl
- Mildred Hardy
- Old Woman
- Sam Harris
- Man Knocked Down on Sidewalk / Townsman Shot by Firing Squad (uncredited)
- Ariel Heath
- Undetermined Role
- Hallene Hill
- Woman in Window
- Otto Hoffman
- Victor
- Russell Hoyt
- German Soldier
- Lloyd Ingraham
- Man with Paper on Street
- Elmer Jerome
- Man in Window
- Casey Johnson
- Boy
- Terrellyne Johnson
- Girl
- P.J. Kelly
- Judge
- David Kirkland
- Judge
- Jeanne Lafayette
- Woman on Street
- Gabriel Lenoff
- German First Lieutenant
- Oscar Loraine
- Clerk
- Theodore Lorch
- Juror
- George MacQuarrie
- Chief of Police
- Hal Malone
- Man in Courtroom
- Jack Martin
- German Captain
- Claire McDowell
- Woman in Bathroom
- Ed McNamara
- Policeman
- Edward McNamara
- Officer in Crowd Viewing Arrest of Printers
- Freddie Mercer
- Boy in Classroom
- Hans Moebus
- German Chauffeur
- Barbara Moffett
- Undetermined Role
- Rudolf Myzet
- German Soldier
- O'Neill Nolan
- Henry
- William J. O'Brien
- Night Switchman
- Frank O'Connor
- Juror
- Lillian O'Malley
- Woman in Street
- Paul Parry
- Undetermined Role
- June Pickerell
- Woman in Window
- Lon Poff
- Old Man
- John Rice
- Burly Cop
- Ferdinand Schumann-Heink
- Karl
- Hans Schumm
- German Sergeant Who Pushes Albert
- Lester Sharpe
- German Soldier
- Jack Shea
- Burly Cop
- Ida Shoemaker
- Woman in Street
- George Sorel
- German Sergeant
- Robert R. Stephenson
- German Sergeant on Street
- Gus Taillon
- Newsman
- Walter Thiele
- German Soldier
- Bob Thom
- Undetermined Role
- Nicholas Vehr
- German Soldier
- Hans von Morhart
- Soldier Who Gets Slapped
- Cecil Weston
- Mrs. Lorraine
- William Yetter Sr.
- Otto
