John Wyatt is a government agent sent to smash a counterfeiting operation near the Mexican border. Joining Doc Carter's medicine show they arrive in the town where Curly Joe, who once framed Carter, resides.
| Actor | Role |
|---|---|
 John WayneJohn Wyatt | John Wyatt |
 Marion BurnsLinda Carter alias Princess Natasha | Linda Carter alias Princess Natasha |
 Reed HowesHenchman Red | Henchman Red |
 Earle HodginsDoc Carter | Doc Carter |
 Gino CorradoRurales Captain | Rurales Captain |
 Yakima CanuttCurly Joe Gale | Curly Joe Gale |
 Perry MurdockIke | Ike |
 Gordon CliffordMike | Mike |
 Henry HallColonel Peters | Colonel Peters |
| JJoe DominguezMiguel | Miguel |
 Herman HackDeputy Herman | Deputy Herman |
 James SheridanPete | Pete |