Chapter Titles: 1. Trail to Empire; 2. The Rider of the Stallion' 3. The Death Leap; 4. Avalanche; 5. Volley of Death; 6. Thundering Wheels; 7. Trail Treachery; 8. The Whistling Arrow; 9. The Fatal Message; 10. Ambush; 11. Tunnel of Terror; 12. Human Targets.
The rights to Hal G. Evarts' story were sold to Republic Pictures by his widow. Ironically, the serial isn't faithful whatsoever to Evarts' original story: the writers substituted an entirely different story.