The Wrecker wrecks trains on the L & R Railroad. One of his victims is Larry Baker’s father. Baker wants to find the evildoer, among a host of suspects, but it will be difficult since the Wrecker can disguise himself to look like almost anyone.
Adventure | Crime | Drama
| John Wayne | … | Larry Baker | |
| Shirley Grey | … | Gloria Stratton, aka Gloria Martin | |
| Tully Marshall | … | Howard L. Edwards, Railroad manager | |
| Conway Tearle | … | Stevens, Railroad attorney | |
| J. Farrell MacDonald | … | Jim Baker, Railroad engineer | |
| Matthew Betz | … | Tom Jordan, Railroad engineer (as Mathew Betz) | |
| James P. Burtis | … | Det. Hemingway, Matthews, assistant (as James Burtis) | |
| Lloyd Whitlock | … | Walter Gray, Airline manager | |
| Joseph W. Girard | … | Detective Matthews (as Joseph Girard) | |
| Edmund Breese | … | Frank Stratton, Gloria’s father | |
| Al Bridge | … | Carlson, Plainville station agent (as Alan Bridge) | |
| Ernie Adams | … | Henchman Barney, Machine gunner (as Ernie S. Adams) | |
| Charles King | … | Henchman Mike | |
| Glenn Strange | … | Henchman Jim | |
| Al Ferguson | … | Henchman Sandy – The ‘Wrecker’s’ pilot |