- Marjorie Weaver
- Dallas Gilmartin
- George Reeves
- Bob Grayson
- Richard Derr
- Max, posing as Colonel Von Rohn
- Steven Geray
- Karl Botany, alias C.B. Haldane
- Milton Parsons
- Mr. Sartoris
- Spencer Charters
- Mr. Gallon
- Lucien Littlefield
- Jones, Nervous Man at Tourist Camp
- Elisha Cook Jr.
- Hotel Clerk
- Minerva Urecal
- Mrs. Jones, Nervous Man's Wife
- Bodil Rosing
- Klara, Botany's Housekeeper
- Richard Lane
- Editor Grundy
- Barbara Pepper
- Myrtle, Hotel Guest
- William Edmunds
- Otto Kisling
- George Cleveland
- Sheriff Pickering
- Kurt Katch
- Hans Brinkner
- Lenita Lane
- Cataloni's Nurse-Receptionist
- Ethel Griffies
- Mrs. Zagra
- Stanley Andrews
- FBI Chief Ed Ruby
- George Chandler
- Country Cab Driver
- Heinie Conklin
- Audience Member
- Jimmy Conlin
- Stuttering Tenant
- Hal K. Dawson
- Drunk Reporter
- John Dilson
- Cable Reporter with Von Rohn Bulletin
- Frank Hagney
- Dancehall Patron with Picture
- Spec O'Donnell
- Office Boy Finding Body
- Dick Rich
- Detective McRyan
- George Riley
- Eddie - Photographer
- Jack Roper
- Dancehall Gatekeeper
- Frank M. Thomas
- Dr. G.G. Cataloni
- Basil Walker
- Minor Role
