Challengers of the Unknown 80
May - June 1973

Reprint
"The Day the Earth Blew Up!"

Cover: Nick Cardy
20¢
Story and art © DC Comics

Reprints "The Day the Earth Blew Up!" from Showcase 11.

The Challengers' uniforms are re-colored red-yellow to echo the superhero run.

This was the last of three reprint issues.

The cover doesn't reprint the original issue with the alien general. Instead it's a re-draw by Nick Cardy (and inks?) based on a Jack Kirby interior page, with changes.

Here's the original page from Showcase 11.

Here's the recolored page from this issue. Red wears red and yellow, and the robot wears pink.

And here, serendipitously, is the original cover offered on eBay.