Super Thriller Comic #12

The issue features "Ace Hart the Atom Man," in which Ace Hart battles devil soldiers and a giant ape in a jungle setting near Death Valley, ultimately destroying an evil island and its X-gun weapon. A second story follows a character named Stevie who pursues crooks through a gorge, engages in combat with them, and later appears at a jailhouse, where a character named Michael Trueman references a stolen diamond.