Chapter Titles:
- 1. The Vigilante Rides Again
- 2. Mystery of the White Horses
- 3. Double Peril!
- 4. Desperate Flight
- 5. In the Gorilla's Cage
- 6. Battling the Unknown
- 7. Midnight Rendezvous
- 8. Blasted to Eternity
- 9. The Fatal Flood
- 10. Danger Ahead
- 11. X-1 Closes In
- 12. Danger Rides the Rails
- 13. The Trap That Failed
- 14. Closing In
- 15. The Secret of the Skyroom
The hero of this serial is the Golden Age Vigilante; the second Vigilante, Adrian Chase, was a lawyer who took to fighting criminals after his family was slain by gangsters, and who took his own life after his true identity was revealed on national TV.