 Randolph ScottTom Andrews | Tom Andrews |
 Jane WyattDr. Edith Cabot | Dr. Edith Cabot |
 J. Carrol NaishDynamite Dawson | Dynamite Dawson |
 Victor JoryDirk Rourke | Dirk Rourke |
 Nancy OlsonCecille Gautier | Cecille Gautier |
 Robert BarratWilliam Van Horne | William Van Horne |
 John ParrishMr. Gautier | Mr. Gautier |
| MMary KentMrs. Gautier | Mrs. Gautier |
 Walter SandeMike Brannigan | Mike Brannigan |
 Don HaggertyCagle | Cagle |
 John HamiltonPere Lacomb | Pere Lacomb |
| GGrandon RhodesDr. Mason | Dr. Mason |
 Dick WesselBailey | Bailey |
 George ChandlerTelegraph Operator | Telegraph Operator |
 Howard NegleyMallis | Mallis |
 Ralph ClantonOpening Narrator (voice) | Opening Narrator (voice) |
 Chief YowlachieIndian Chief (uncredited) | Indian Chief (uncredited) |
 Norman JewisonJoe Podge (uncredited) | Joe Podge (uncredited) |
 Earle HodginsSandy McNair (uncredited) | Sandy McNair (uncredited) |
 Edmund CobbJim (uncredited) | Jim (uncredited) |
| CChris Willow BirdIndian Chief (uncredited) | Indian Chief (uncredited) |
| BBen ErwayBritish Columbia Representative (uncredited) | British Columbia Representative (uncredited) |
 Sam AshSpeaker from Ontario (uncredited) | Speaker from Ontario (uncredited) |
 Holmes HerbertHead of Canadian Parliament (uncredited) | Head of Canadian Parliament (uncredited) |
| BBert StevensMember of Parliament (uncredited) | Member of Parliament (uncredited) |
 Manuel ParísMember of Parliament (uncredited) | Member of Parliament (uncredited) |
| OOliver CrossMember of Parliament (uncredited) | Member of Parliament (uncredited) |
| AAl HaskellTrapper (uncredited) | Trapper (uncredited) |
 Richard AlexanderRailroad Worker (uncredited) | Railroad Worker (uncredited) |
 Ray BennettRailroad Worker (uncredited) | Railroad Worker (uncredited) |
