Superman Presents World's Finest Comic Monthly #73

In "The Boy Who Saved the Earth," a young boy stumbles upon a tiny, alien spacecraft that has landed on Earth—unaware it's the vanguard of an impending invasion from the distant world of Kadar-Zee. As the advance ship's true nature begins to reveal itself, the boy finds himself at the center of a crisis far beyond his understanding.

In "Supergirl's Day of Danger!", Supergirl volunteers for a high-stakes experiment that quickly spirals out of control. When Tony Walston gains her invulnerability for a single day, every injury he suffers is mirrored in her—leaving her vulnerable and on the edge of danger as the clock ticks down.