- CHAPTER I On Secret Duty免费
- CHAPTER II The Air Monster免费
- CHAPTER III Mystery Plane免费
- CHAPTER IV Danger in the Air免费
- CHAPTER V No Clues免费
- CHAPTER VI The Night Alarm免费
- CHAPTER VII Suspicions免费
- CHAPTER VIII Mysterious Moves免费
- CHAPTER IX On the East Side免费
- CHAPTER X The Neptune Sails免费
- CHAPTER XI In The Hangar免费
- CHAPTER XII Trial Flight免费
- CHAPTER XIII Wings of the Storm免费
- CHAPTER XIV Flood Relief免费
- CHAPTER XV The Northern Seas免费
- CHAPTER XVI Rescue in the Arctic免费