When Robin Grant inherits a valuable range, certain evil interests try their best to kill off Robin and claim the land for themselves. US Marshall Steve Saunders comes to the boy's rescue.
| Actor | Role |
|---|---|
 Charles StarrettSteve Saunders / Durango Kid | Steve Saunders / Durango Kid |
 Smiley BurnetteSheriff Smiley Burnette | Sheriff Smiley Burnette |
 T. Texas TylerT. Texas Tyler | T. Texas Tyler |
 Lois HallPatty McGregor | Patty McGregor |
 Tommy IvoRobin Grant | Robin Grant |
 John DehnerDuke Webster | Duke Webster |
 Jason Robards Sr.Phineas Grant | Phineas Grant |
| DDan SheridanMorgan Webster | Morgan Webster |
 Jock MahoneyBill Grant | Bill Grant |
 George ChesebroEllory Webster | Ellory Webster |