In the US this serial had 15 chapters. CHAPTER TITLES: 1. The Lady in Number '7'; 2. The Masked Stranger; 3. An Hour to Live; 4. Kidnapped; 5. The Life Current; 6. The Dead Come Back; 7. Into Thin Air; 8. The Stranger Disposes; 9. When Jail Birds Fly; 10. The Hole-in-the-Wall; 11. Love's Sacrifice; 12. Riddle of the Double Cross; 13. The Face of the Stranger; 14. The Hidden Brand; 15. Mystery of the Double Cross.
One of the few silent serials to survive with all episodes intact.
In France this serial was condensed into nine chapters. CHAPTER TITLES: 1: L'inconnue du numéro 7;; 2: Rivalité; 3: Chacun son tour; 4: Un court-circuit; 5: Le reporter du Daily Observer; 6: Le bar de l'araignée verte; 7: Le krach; 8: Révélation; 9: Les deux jumelles.