Watch where you're going, Superman! Think first, fly and punch later!
The Story: "Indestructible Creatures of Nightmare Island!" by Gardner Fox, Mike Sekowsky, and Bernard Sachs. Ambitious--but woefully misguided--philosopher Andrew Helm creates a machine which will affect the conscience of every person on Earth to insure World Peace.
Of course, it all goes wrong, and it creates chaos instead! The JLA, also of course, gets involved.
Roll Call: Superman, Batman, Wonder Woman, Aquaman, Flash, Green Lantern, Martian Manhunter, Green Arrow, Atom, Hawkman
Notable Moments: Features historical cameos by Moses, Christ, Confucius, Mohammed, and Buddha, who were briefly considered to get their own Showcase tryout.
Some classic DC villains show up, like Captain Cold, The Shark, Mirror Master, and the Penguin. And the letters page informs us that Hawkman "has all earthly knowledge implanted in his brain." Good to know!