Crisis On Earth-One! * This issue features the first team-up between the Golden Age Justice Society of America and the Silver Age Justice League of America, both of which are the creations of writer Gardner Fox. This begins a series of annual team-ups between both groups which continues until Justice League of America #231. This story also expands upon the concept of the Multiverse.
Batman chairs a meeting of the Justice League of America. He tells the team that he just learned that Chronos, Doctor Alchemy and Felix Faust have banded together as the Crime Champions and intend to rob a bank in Powers City. The group splits into three teams to take down each of the super-villains.
Meanwhile, on the parallel world of Earth-Two, the Justice Society of America have received a challenge from three of their most well-known adversaries: The Fiddler, the Icicle and the Wizard. Eager to begin adventuring as a team once again, the JSA officially come out of retirement.
Back on Earth-One, Felix Faust plunders a sunken battleship. Aquaman, the Atom and Martian Manhunter arrive to stop him, but Faust crushes Aquaman with a tidal wave and conjures fire to keep the Manhunter at bay. The Atom knocks the fire away, and Martian Manhunter uses his Martian-Breath to blow the Atom like a bullet towards Faust, but the villain suddenly disappears.
With little recourse, the League uses the Crystal Ball of Merlin to contact the Flash. The Flash tells them that he is trapped between dimensions and that they should use the Crystal Ball to contact their Earth-Two counterparts the Justice Society. The League conducts a s?ance over the Crystal Ball and the orb's magic succeeds in bringing the Justice Society to Earth-One. Both teams pledge to help the other in stopping the Crime Champions.
