A mysterious master criminal known as The Voice plots with his gang to sabotage the Milesburg Oil Company, but the rightful heir has a secret army of her own to protect her rights.
| Actor | Role |
|---|---|
 Harry Carey'Happy' Cardigan | 'Happy' Cardigan |
 Edwina BoothCaroline Hall | Caroline Hall |
 William DesmondMilesburg Sheriff | Milesburg Sheriff |
 Frankie DarroJimmie Williams | Jimmie Williams |
 Philo McCulloughStevens | Stevens |
 Yakima CanuttYak | Yak |
 Joe BonomoStuffy | Stuffy |
 Tom DuganOil Co. Director Warren | Oil Co. Director Warren |
 Lafe McKeeT.J. Hornbeck | T.J. Hornbeck |
 Bob KortmanMarno | Marno |
 Edward HearnJed Williams | Jed Williams |
 Paul WeigelOil Co. Director Larribee | Oil Co. Director Larribee |
 Frank BrownleeOil Co. Director Bishop | Oil Co. Director Bishop |
 Olive CareyNurse Lewis | Nurse Lewis |
 Al TaylorSheriff of Slocum / Deputy Thompson / Henchman Dave / Horseman | Sheriff of Slocum / Deputy Thompson / Henchman Dave / Horseman |
 Dick DickinsonRawlins | Rawlins |
 Pete MorrisonPete Morrison | Pete Morrison |
 Dick HattonJames "Dodger" Valenti | James "Dodger" Valenti |
 Boris KarloffThe Voice (voice) | The Voice (voice) |
 Bob WalkerOil Co. Director Allen | Oil Co. Director Allen |
 RexRex | Rex |