Serial: Radio Patrol, 1937

A worldwide criminal group tries to obtain the recipe for a new bulletproof steel, but a young radio officer and a pretty female stop them.
Chapter titles:
1. A Million Dollar Murder
2. The Hypnotic Eye
3. Flaming Death
4. The Human Clue
5. The Flash of Doom
6. The House of Terror
7. Claws of Steel
8. The Perfect Crime
9. Plaything of Disaster
10. A Bargain with Death
11. The Hidden Menace
12. They Get Their Man