- Allan Lane
- Dave King
- Robert Strange
- John Kettler
- Robert Kellard
- Tom Merritt Jr.
- Lita Conway
- Linda Merritt
- Harry Cording
- Wade Garson
- Bryant Washburn
- Matt Crandall
- Herbert Rawlinson
- Ross King
- Budd Buster
- Vinegar Smith
- Norman Willis
- Tarner
- John Davidson
- Shelton
- Tony Paton
- LeCouteau
- Ted Mapes
- Blake - Henchman
- Charles Thomas
- Burly Henchman in Launch and at finale [Continuity Name: Bayliss]
- John Dilson
- Enemy Scientist
- Lucien Prival
- Enemy Admiral
- Paul McVey
- Enemy Dignitary ('Your Excellency')
- Stanley Andrews
- Thomas Merritt, Sr.
- George DeNormand
- Kent - Henchman
- Alan Gregg
- Const. Mills
- Sam Harris
- Sir Harold Bolton
- Bruce Kellogg
- RCMP Constable MacCloud
- Wallace Reid Jr.
- Const. Doyle
- Loren Riebe
- Dinwoodie - Henchman
- Dick Simmons
- Const. Carter
- William Stahl
- Cpl. Hastings
- Ken Terrell
- Lead Sawmill Henchman
- Frank Wayne
- Brant - Launch Pilot Henchman
