Sergeant Bob Steele (Bob Custer), of the Texas Rangers, is assigned to put an end to the lawlessness of a gang of outlaws led by a mysterious man known as 'The Black Hawk.' Hoping to infiltrate the gang, he poses as an outlaw named "Lightning" Brady.
| Actor | Role |
|---|---|
 Bob CusterSgt. Bob Steele, posing as Lightning Brady | Sgt. Bob Steele, posing as Lightning Brady |
 George FieldDr. Deering, aka The Black Hawk | Dr. Deering, aka The Black Hawk |
 Margaret LandisRuth Deering | Ruth Deering |
 William DyerSheriff Mackhart | Sheriff Mackhart |
 Max AsherMackhart's Deputy | Mackhart's Deputy |
 Fontaine La RueWetona | Wetona |
 Steve ClementeMexican Henchman | Mexican Henchman |
| JJoseph BennettBob Murtison | Bob Murtison |