Challengers of the Unknown #19

In "The Alien Who Stole a Planet," the Challengers of the Unknown encounter a pair of stranded aliens whose ship is grounded on Earth, relying on a rare element to get home. When one of their crewmates betrays them, driven by a desire to return and seize control of his homeworld, the team finds themselves caught in a crisis far beyond their usual adventures. Written by Arnold Drake and illustrated with dynamic flair by Bob Brown (pencils and inks), with lettering by Stan Starkman, this 1961 DC classic features a cover by Bob Brown that captures the alien mystery and tension.