The Purple Monster Strikes Part11 Menace from Mars

The Martians need Cyrus Layton's "Jet Plane" spaceship plans to build an invasion fleet. Yes, I know that Martian bioengineering can produce beings like the Purple Monster who are strong and agile in Earth's higher gravity. Yes, I know the Purple Monster has a faster-than-light radio that can contact the Emperor of Mars with no time delay. And yes, the Martians already have a craft that can send his second agent--Marcia--40 million miles to Earth in about five minutes. But trust me when I say their invasion will never succeed without the spaceship plans of one earthman from the 1940s. (1945 - Republic Pictures)