Action Comics #167

In "The Man Who Stopped Space-Flight!", Dr. Graham Landon, a man convinced that Earth should remain isolated from the cosmos, builds a device that shuts down the atomic motors of all spaceships—halting interplanetary travel altogether. When Tommy and Brent uncover a way to reverse the machine’s effects, they return to confront Landon with a directive to surrender any non-Earth-made item in his home, from walls to shoes to televisions. The story follows their mission to restore the stars to humanity’s reach, and Landon’s reluctant reckoning with his own beliefs.