Murder in the Air (1940)

Enemy agents are everywhere and they are sabotaging all important war deliveries The body of a hobo found in a train wreck had a money belt with 50000 and a tattoo of a circle and arrow This is a tattoo for saboteurs for hire and Brass must impersonate the dead man to find out what his orders are As Steve Coe he meets with the band of enemy agents in California and everything goes well until the wife of the dead Hobo shows up Luckily Gabby is able to save Brass and Brass learns what is his assignment He is to board the USN airship Mason which is testing the super secret Inertia Projector and destroy the airship