- Richard Webb
- Lane Carson
- Aline Towne
- Carol Richards
- Lane Bradford
- Burton
- Stanley Price
- The Phantom Ruler
- John Crawford
- Harris
- George Meeker
- Harry Long
- Keith Richards
- Doctor [Ch.12]
- Dale Van Sickel
- Otto Wagner / Frank Martin [Chs. 1, 10]
- Tom Steele
- Bill 'Mack' Haines [Chs. 5,10]
- Marshall Reed
- MacDuff - Roadblock Cop [Chs.1, 7-9]
- Forest Burns
- Joe - Watchman [Ch.5]
- Eddie Parker
- Stoner - Barn Henchman[Ch.9]
- Frank O'Connor
- Hogan [Ch.5]
- Charles Regan
- Art
- Charles Sullivan
- Grogarty - Squad Car Cop [Chs.7-8]
- Howard M. Mitchell
- Second Garage Watchman [Ch.7]
- Bud Wolfe
- Harding - Henchman [Ch.8]
- Douglas Evans
- James Hunter [Chs. 1, 3, 7, 12]
- Harold Goodwin
- Kirk - Body-Shop Henchman [Ch.11]
- Roy Gordon
- Mr. Moore [Chs.8-9]
- John Hamilton
- Henry Miller [Chs. 1, 8, 12]
- Edward Keane
- Warren Madison
- Bert LeBaron
- Crooked Watchman [Ch.2]
- Carey Loftin
- Dirk - Dynamite Thug [Ch.6]
- George Magrill
- Sam - Thug-Truck Driver [Chs.4-5]
- Tom Monroe
- Gates - Cop in Cave [Ch.7]
- David Sharpe
- 3rd Garage Watchman [Chs. 3-4] / 2nd Armored Car Guard [Ch. 11] (uncredited)
- Mark Strong
- Bank Watchman [Ch.1]
- Duke Taylor
- Second Roadblock Cop [Ch.1]
- Guy Teague
- Al - Decoy & Dump-Truck Thug [Chs. 5, 7]
- Ken Terrell
- Kern - Henchman [Chs. 8-9]
- George Volk
- Second Armored Car Guard [Ch.11]
