Sergeant MacLane of the Mounties investigates the disruptive activities of a bunch of troublemakers.
| Actor | Role |
|---|---|
 Robert KellardSergeant Mack MacLane RCMP | Sergeant Mack MacLane RCMP |
 Nell O'DayDiana Blake | Diana Blake |
 Kenneth MacDonaldMort Ransome | Mort Ransome |
 Herbert RawlinsonRichard Winton | Richard Winton |
 John ElliottFactor J. L. Blake | Factor J. L. Blake |
 Richard FiskeConstable Brady | Constable Brady |
 Forrest TaylorPreacher Hinsdale | Preacher Hinsdale |
 George ChesebroGaspard | Gaspard |
 Jack IngramBaptiste | Baptiste |
 I. Stanford JolleyPierre | Pierre |
 Al FergusonMike | Mike |
 Bud OsborneJake | Jake |
| NNick ThompsonBlack Bear | Black Bear |
| AArt MilesChief Flying Cloud | Chief Flying Cloud |
 Rick VallinLittle Wolf | Little Wolf |
 Hank BellMartin | Martin |
 Tom LondonGaynor | Gaynor |
 Kermit MaynardConstable Collins | Constable Collins |
 Stanley PriceHood | Hood |
 Knox ManningNarrator | Narrator |
 Charles KingCurly | Curly |