- Jim Bannon
- Sgt. Chris Royal, RCMP
- Virginia Belmont
- Roberta 'Bobbie' Page
- Anthony Warde
- Mort Fowler
- Dorothy Granger
- Skagway Kate
- Bill Van Sickel
- Dan Page
- Tom Steele
- Fagan / Carter / Truck Driver / Lou / Sloane / Spike
- Dale Van Sickel
- Boyd / Pete / Bart / Scott / Steele
- I. Stanford Jolley
- Prof. J.P. Belanco[Ch. 2-4, 7, 9-12]
- Phil Warren
- Cpl. George Hale
- Lee Morgan
- Dale - Henchman
- James Dale
- Andrew "Andy' Knight
- Ted Adams
- 'Oldtimer' Meggs - Skagway Kate's Piano Player
- John Crawford
- Danton - Henchman
- Jack Rube Clifford
- U. S. Marshal [Ch. 4,12]
- Eddie Parker
- Lowry - Henchman
- Frank O'Connor
- Commissioner Barton [Ch. 9-11]
- George Bell
- Townsman
- Roy Bucko
- Henchman
- James Carlisle
- Commissioner Martin Addison [Ch. 10-11]
- Bill Clark
- Townsman
- Harry Cording
- Track Heavy #2
- Arvon Dale
- Roy Watson [Ch. 2]
- Paul Gustine
- Ken
- Chick Hannan
- Townsman
- Jack Kirk
- A.L. Thomas [Ch. 7]
- Carey Loftin
- Baggage Car Clerk / Porter (uncredited)
- Ted Mapes
- Constable Mack [Ch. 11]
- Tom McDonough
- Frank
- Jimmy Noel
- Townsman
- House Peters Jr.
- Ford - Henchman
- Eddie Phillips
- Baker
- Mike Ragan
- Garson [Ch. 9, 12]
- Marshall Reed
- Dave / Douglas / Williams / Jim Sawyer [Ch. 5, 7-8, 10 -11] (uncredited)
- Charles Regan
- Ralph
- Al Taylor
- Track Heavy #1
- Ken Terrell
- Art / Curry / Fenton / Grady / Masters / Guard / Tom (uncredited)
- Robert J. Wilke
- Cpl. Baxter [Ch.11]
- Bud Wolfe
- Zeke / Vance (uncredited)
