Crooks discover a Genghis Khan treasure ship on the Canada-Alaska border but the treasure is hidden somewhere on land. In their efforts to find the hidden treasure they resort to murder and sabotage to stop the construction of the Alcan highway which will bring homesteaders to the area. Sergeant Royal of the Royal Canadian Mounted Police battles through 12 episodes to find the crooks and to learn the identity of their mysterious leader known only as 'The Boss'.
| Actor | Role |
|---|---|
 Jim BannonSgt. Chris Royal, RCMP | Sgt. Chris Royal, RCMP |
 Virginia BelmontRoberta 'Bobbie' Page | Roberta 'Bobbie' Page |
 Anthony WardeMort Fowler | Mort Fowler |
 Dorothy GrangerSkagway Kate | Skagway Kate |
| BBill Van SickelDan Page | Dan Page |
| TTom SteeleFagan / Carter / Truck Driver / Lou / Sloane / Spike | Fagan / Carter / Truck Driver / Lou / Sloane / Spike |
 Dale Van SickelBoyd / Pete / Bart / Scott / Steele | Boyd / Pete / Bart / Scott / Steele |
 I. Stanford JolleyProf. J.P. Belanco[Ch. 2-4, 7, 9-12] | Prof. J.P. Belanco[Ch. 2-4, 7, 9-12] |
| PPhil WarrenCpl. George Hale | Cpl. George Hale |
| LLee MorganDale | Dale |
| JJames DaleAndrew "Andy' Knight | Andrew "Andy' Knight |
 Ted Adams'Oldtimer' Meggs - Skagway Kate's Piano Player | 'Oldtimer' Meggs - Skagway Kate's Piano Player |
 John CrawfordDanton - Henchman | Danton - Henchman |
 Jack Rube CliffordU. S. Marshal [Ch. 4,12] | U. S. Marshal [Ch. 4,12] |
 Eddie ParkerLowry - Henchman (as Eddy Parker) | Lowry - Henchman (as Eddy Parker) |
 Frank O'ConnorCommissioner Barton [Ch. 9-11] | Commissioner Barton [Ch. 9-11] |