A 12 episode serial starring Rex, the King of the Wild Horses and Rin-Tin-Tin, Jr. Rex is brought from the island of Sujan, where he is worshiped as a God-Horse, to the U.S. to be trained as a polo pony. He escapes, meets Rinty and with the help of Frank Bradley is returned to Sujan. The natives have been persuaded to turn against their God-Horse, however he is rescued just in time before he is burned as a sacrifice.
| Sound | Lee Zahler | Music |
| Writing | John Rathmell | Screenplay |
| Crew | Eddie Parker | Stunts |
| Writing | Ray Trampe | Screenplay |
| Production | Nat Levine | Producer |
| Directing | B. Reeves Eason | Director |
| Writing | B. Reeves Eason | Screenplay |
| Directing | Ford Beebe | Director |
| Writing | Maurice Geraghty | Screenplay |
| Writing | Barney A. Sarecky | Screenplay |
| Editing | Richard Fantl | Editor |
| Editing | Joseph H. Lewis | Editor |
| Crew | Ted Mapes | Stunts |
| Crew | Joe Yrigoyen | Stunts |
| Crew | Clifford A. Ruberg | Sound Recordist |
| Crew | Tracy Layne | Stunts |
| Camera | William Nobles | Director of Photography |
