Tim Hart (Tim McCoy), a former Texas Ranger, comes out of retirement to avenge the death of Lightnin' Ed (Frank LaRue), his foster father, who had been sent to Rainbow's End, to investigate a series of train robberies. He senses that George Johnson (Walter McGrail) and his henchman, Speck (Bob Kortman), head the robbery gang, especially after Speck makes an ambush attempt on his life.
| Actor | Role |
|---|---|
 Tim McCoyTim Hart | Tim Hart |
| KKathleen EliotJoan Carter (as Kathleen Elliott) | Joan Carter (as Kathleen Elliott) |
 Walter McGrailGeorge Reynolds aka Johnson | George Reynolds aka Johnson |
 Mary CarrMrs. Martha Carter | Mrs. Martha Carter |
 George CooperHappy | Happy |