Charles Hutchison came up with the story while recuperating from a dislocated elbow he sustained during filming for a version of 'The Fortieth Door' which was never completed.
Joe Cuny doubled for Charles Hutchison many times while filming this serial. He was paid $5 for each stunt. "Let Joe take the five" became Hutch's catch phrase on set.
Director George B. Seitz and Spencer Gordon Bennet were among the impromptu stunt doubles for Charles Hutchison. Hutch avoided doing many of the more arduous stunts because his injuries from previous projects had not healed.
Episode titles:1. The Secret Cipher2. The Cycle Bullet3. The Millionth Chance4. Smashing Through5. One Against Many6. At the Risk of His Neck7. On a Dangerous Coast8. Double Crossed9. Overboard10. The Show Down11. Hare and Hounds12. Red Courage13. Neck and Neck14. The Secret of the Flame15. The Last Duel