Superman: The Fleischer Cartoons

Season 1

Episode 10: Japoteurs

Clark Kent and Lois Lane are covering an event surrounding the test flight of the world's largest bomber when Lois seizes an opportunity to stow away on the plane to witness the flight first-hand. Shortly into the flight, Japanese spies who also had stowed away take control of the plane with plans to fly it back to Tokyo. Lois Lane secretly alerts the base, but when the military's attempt to intercept the plane is thwarted, Superman steps in.