Hoppy and Lucky have been called in to investigate a series of stage holdups. The robbers are taking gold from Colby's mine and Hoppy suspects it may be ex-outlaw Colby himself. When Speedy strikes gold, Hoppy borrows it and announces a gold shipment hoping to catch the gang and their leader.
| Actor | Role |
|---|---|
 William BoydHopalong Cassidy | Hopalong Cassidy |
 Russell HaydenLucky Jenkins | Lucky Jenkins |
 Minor WatsonEd Colby | Ed Colby |
 Ruth RogersJane Colby | Jane Colby |
 Britt WoodSpeedy | Speedy |
 Ethel WalesMatilda Purdy | Matilda Purdy |
 Lee PhelpsSheriff Cameron | Sheriff Cameron |
 Roy BarcroftHendricks | Hendricks |
| GGeorge AndersonWard Ackerman | Ward Ackerman |
 Eddie DeanLogan | Logan |
 Ray BennettFleming | Fleming |
 Jack RockwellStage Driver | Stage Driver |
| AArt DillardHenchman | Henchman |
 Bob KortmanHideout Henchman | Hideout Henchman |
 Walter LongSanford | Sanford |
| MMerrill McCormickTownsman | Townsman |
| BBruce MitchellJim | Jim |
 George MorrellTownsman | Townsman |
 Bill NestellTownsman | Townsman |
 Cliff ParkinsonHenchman | Henchman |