Serial: Junior G-Men, 1940

A gang of street kids work with the FBI in their attempt to find and rescue their leader's father, a scientist who has been kidnapped by a terrorist group.
Chapter titles
1. Enemies Within
2. The Blast of Doom
3. Human Dynamite
4. Blazing Danger
5. Trapped by Traitors
6. Traitors' Treachery
7. Flaming Death
8. Hurled Through Space
9. The Plunge of Peril
10. The Toll of Treason
11. Descending Doom
12. The Power of Patriotism