- William Powell
- Lieutenant Bill Gordon
- Rosalind Russell
- Joel Carter
- Binnie Barnes
- Olivia Kerloff
- Lionel Atwill
- Major William Brennan
- Cesar Romero
- Captain Nicholas Nieterstein
- Samuel S. Hinds
- John Carter
- Henry Stephenson
- Ambassador
- Frank Reicher
- Dr. R.A. Jackson
- Charley Grapewin
- Martin
- Leonard Mudie
- Roberts
- Howard Hickman
- G-Man
- Charles Trowbridge
- Secretary of War Baker
- Murray Kinnell
- de Segroff
- Lowden Adams
- Butler
- Rudolph Anders
- Radio Operator
- Johnny Arthur
- Code Room Clerk
- Sam Ash
- Mexican
- Max Barwyn
- Boris Stronskoff - Russian Singer
- Sidney Bracey
- Jackson's Assistant
- Harry C. Bradley
- Cashier
- Lynton Brent
- Decoder
- Al Bridge
- Sergeant
- David Burns
- German-Speaking Bellhop
- James P. Burtis
- Private
- Allan Cavan
- Undetermined Secondary Role
- Charles Coleman
- Café Doorman
- Melville Cooper
- Doorman
- Gino Corrado
- Code Room Clerk
- Blair Davies
- Code Room Sentry
- Edgar Dearing
- 1st Military Policeman
- Tom Dugan
- Agent Patrick O'Reilly
- Margaret Dumont
- Mrs. Hendricks
- Edward Earle
- Man in Code Room
- Earl Eby
- G-Man
- James Flavin
- 2nd Military Policeman
- Mary Forbes
- Lady Cavendish
- Arno Frey
- Army Officer
- Hans Fuerberg
- German Torpedo Man
- Sherry Hall
- Pvt. Dean
- Winter Hall
- Chaplain
- John Harmon
- Telegrapher
- Jack Hatfield
- Drug Store Clerk
- Bernadene Hayes
- Bobbie Burns
- Sterling Holloway
- Taxi Driver
- Lee Kohlmar
- Tailor
- Frank Lackteen
- Customs Officer in Mexico
- Wally Maher
- Reporter
- Sam McDaniel
- Porter
- Belle Mitchell
- Mexican
- William V. Mong
- Hotel Desk Clerk
- Bert Moorhouse
- 2nd Lieutenant
- Henry Mowbray
- Diplomat
- William Newell
- Carter's Receptionist
- Frank O'Connor
- Officer
- Eileen O'Malley
- Red Cross Nurse
- Pat O'Malley
- Undetermined Secondary Role
- Bob Perry
- G-Man
- Lee Phelps
- Fighting Policeman
- Richard Powell
- Taxi Driver
- Hedwiga Reicher
- De Segroff's Associate
- Cyril Ring
- Orderly
- Jeanie Roberts
- Burns' Secretary
- Mickey Rooney
- Country Boy
- Sam Savitsky
- Colonel Petroff
- Sid Silvers
- Recruiter
- Leonid Snegoff
- Kaieneff
- William Stack
- Headwaiter
- Larry Steers
- Partitioner
- Milburn Stone
- Carter's Aide
- Guy Usher
- Ship's Captain
- Michael Vallon
- Orderly
- Monte Vandergrift
- Sailor
- Theodore von Eltz
- Desk Clerk Assistant
- Morgan Wallace
- Gardner
- Harry 'Zoup' Welsh
- Barber
- Charles C. Wilson
- Editor
- Eric Wilton
- Kesterman
