“THE BIG BOOM!!” Superman and Jimmy do battle with the Four-Armed Terror, but what exactly is it that this new menace is after?

1. Cover by Jack Kirby, Murphy Anderson, Neal Adams and photographic background.
2. "The Big Boom!!" written and penciled by Jack Kirby, heads of Superman and Jimmy Olsen by Murphy Anderson and inked by Vince Colletta. Reprinted in Jimmy Olsen: Adventures by Jack Kirby and Jack Kirby's Fourth World Omnibus #1. The Four-armed Monster tunnels his way toward Project Cadmus' atomic pile. Can Superman stop it in time? And what about the rest of its kind?