The first of two Universal Pictures serials and four Monogram Pictures feature films based on Hal Forrest's syndicated comic strip.
Chapter Titles:
- 1. Death Flies the Mail
- 2. The Mail Goes Through
- 3. Sky Bandits
- 4. The Copper Room
- 5. The Night Flight
- 6. The Baited Trap
- 7. Tommy to the Rescue
- 8. The Thrill of Death
- 9. The Earth Gods Roar
- 10. Death at the Controls
- 11. Rushing Waters
- 12. Littleville's Big Day
According to an item in The Hollywood Filmograph, director Lew Landers was an amateur aviator and used his lunch hours during filming to log hours. He had up to eight hours by the end of the shoot.
The scene of the airplane crash landing on the railroad tracks in Chapter: 12, is used again in Junior G-Men of the Air (1942) Chapter: 2.