Justice League of America #56

Justice League of America #56 (On Sale: July 25, 1967) has a great cover by Carmine Infantino and Murphy Anderson. This may have been my first exposure to Wildcat!

Continuing last issue's JLA/JSA crossover "The Negative-Crisis on Earths One-Two" is by Gardner Fox, Mike Sekowsky and Sid Greene. Collecting the negative radiation given off by the black spheres, the super-heroes treat four of their number with it, granting them sufficient power to overcome the controlled villains. Flash, Green Lantern, Hourman, and Wonder Woman of Earth-2 are chosen, but the radiation also has the side-effect of turning them evil and setting them against their fellows.

As Superman and Robin battle Hourman, Green Arrow and Hawkman fight the Flash, Wildcat and Mr. Terrific combat Green Lantern, and Johnny and the Thunderbolt are matched against Wonder Woman. Johnny Thunder and his Thunderbolt also play a big part in all this. Reprinted in the Justice League of America Archives Vol. 7 HC and Crisis on Multiple Earths Vol. 2 TPB.

Edited by Julius Schwartz.