The Phantom Creeps
Evil Dr. Alex Zorka, played by Bela Lugosi in what would be his last serial appearance, plans to rule the world.
Zorka has created an array of devices to help him in his mission. Hot on his heels are foreign agents and G-Men, all attempting to seize the inventions for their own governments.
Captain Bob West, a G-Man, and Jean Drew, a pretty reporter, join forces in the hunt.