Jed Campbell, a "skypilot," and Nanette, a dance hall girl, meet when each goes to rescue Rex, "King of the Wild Horses," from a trap.
| Actor | Role |
|---|---|
 RexRex (as Rex the Wonder Horse) | Rex (as Rex the Wonder Horse) |
 Jack PerrinParson Jed Campbell | Parson Jed Campbell |
| SStarlight the HorseStarlight | Starlight |
 Barbara WorthNanette | Nanette |
 J.P. McGowanJim Wales | Jim Wales |
| DDavid Dunbar'Squint' Jones | 'Squint' Jones |