- Dave O'Brien
- Captain Midnight
- Dorothy Short
- Joyce
- James Craven
- Ivan Shark
- Sam Edwards
- Chuck
- Guy Wilkerson
- Ichabod Mudd
- Bryant Washburn
- John Edwards
- Luana Walters
- Fury
- Joseph W. Girard
- Major Steel
- Ray Teal
- Borgman
- George Pembroke
- Dr. James Jordan
- Chuck Hamilton
- Martel
- Al Ferguson
- Gardo
- Dick Botiller
- Kraus
- Joe Caits
- Henchman
- John Elliott
- Police Chief
- Franklyn Farnum
- Allen
- Terry Frost
- Army Officer
- Joe Garcio
- Henchman
- Bud Geary
- Henchman
- Herschel Graham
- Policeman
- Frank Hagney
- Henchman
- George Magrill
- Red
- Knox Manning
- Narrator
- Ted Mapes
- Slim
- Charles McMurphy
- Army Air Dispatcher / G-Man Guard at Bungalo (uncredited)
- Edward Peil Sr.
- Fang
- Jack Perrin
- Policeman
- Rose Plumer
- Nurse Grey
- Charles Sherlock
- Spotter
- Lee Shumway
- Burns
- Tom Steele
- Henchman
- Harry Strang
- Policeman
- Charles Sullivan
- Slick
- Slim Whitaker
- Policeman
- Bert Young
- Taxi Driver
