- Lee Bowman
- Lt. Bill Gordon
- Jean Rogers
- Elaine Carter
- Mona Maris
- Olivia Kerlov
- Carl Esmond
- Andre Leemuth
- Paul Cavanagh
- Cmdr. Charles Brennan
- Blanche Yurka
- Mrs. Savarina
- Russell Hicks
- John Carter
- Arthur Shields
- Prof. Harvey Lessmore
- William Post Jr.
- Lanny
- William Tannen
- Jasper Dean
- Frederick Worlock
- Dr. Jackwin
- Curt Bois
- Kestrin
- Felix Basch
- de Segroff
- Addison Richards
- Gordon Trisby
- Edward Fielding
- Secretary of the Navy
- Louis V. Arco
- Assistant
- Tex Brodus
- Officer
- Joyce Bryant
- Girl
- George M. Carleton
- Chaplain
- Frances Carson
- Mrs. Hendricks
- Hans Conried
- Park Hotel Desk Clerk
- Hal Cooke
- Orderly
- Edward Earle
- Dr. Jackwin's Assistant
- Byron Foulger
- Decoding Room Clerk
- Arno Frey
- German
- J. Anthony Hughes
- Pat Riley
- Eddie Lee
- Japanese Man
- Tommy Lee
- Japanese Man
- Grace Lem
- Japanese Woman
- George Lollier
- Marine
- Alphonse Martell
- Stronskoff
- Bert Moorhouse
- Decoding Room Clerk
- Bill Nind
- Waiter
- Pat O'Malley
- Captain Chandler, USS 'Woodhaven'
- William Roberts
- Radio Operator
- Henry Rowland
- Elevator Operator at Park Hotel
- Syd Saylor
- Navy Recruiter
- Milburn Stone
- Park Hotel Desk Clerk
- Phil Tead
- Taxi Driver
- Michael Visaroff
- Col. Petroff
- Hans von Morhart
- German Operator
- James Warren
- FBI Agent
- Gayne Whitman
- Barini
- Beal Wong
- Decoding Room Clerk
