CHAPTER TITLES: 1. The Rattler; 2. The Man Nobody Knows; 3. The Eye That Never Sleeps; 4. The Human Target; 5. Phantom Outlaws; 6. The Perfect Crime; 7. Tarzan the Cunning; 8. The Enemy's Stronghold; 9. The Fatal Warning; 10.The Secret of the Mountain; 11.Behind the Mask; 12.The Judgement of Tarzan.
Edmund Cobb, the uncredited actor who is easily recognizable to Western fans as the masked Rattler in every chapter, is nowhere to be seen in any other capacity as the story progresses, and when the real Rattler is finally unmasked in the final chapter, he turns out to be a different (credited) actor entirely.
Ken Maynard had his own production company at Universal, a major studio, and disliked Mascot's low-budget production methods. Although originally slated for a four-week shooting schedule, production ran an extra week and $15,000 over its $65,000 budget. Although it brought in almost $1 million, Maynard and the budget-conscious Nat Levine of Mascot parted company.