

Aircraft are being shot down by a large black plane with a big "X" painted on the wing. The chief suspects are invited for the weekend to an old dark mansion.
Practical Effects
Real aircraft stunts that modern CGI would embarrass.
Production
Mansion sets so shadowy you can smell the cheap fog machine.

Director
Elmer Clifton
Trivia, insights & behind the scenes
Elmer Clifton directed 70+ films in the 1930s-40s, mostly Poverty Row quickies like this.
The 'mystery plane' trope peaked here but echoed in WWII propaganda films within five years.