||Wonder Woman [Earth-1]; Batman [Earth-1]; Snapper Carr; Flash [Barry Allen]; Martian Manhunter [J'onn J'onzz]; Aquaman; Green Lantern [Hal Jordan]; Batman [Earth-1]; Superman [Earth-1] (all as the Justice League of America/JLA); Xotar (villain)
||Having found an ancient book that appears to indicate that he once defeated the JLA, Xotar travels from 11,960 to the present to test four weapons against the Justice League, in order to determine which weapon will help him defeat the Intersolar Police of his own day. But the JLA counters each of Xotar's weapons and returns him to face justice in his own time.
||Bernard Sachs (chapters 1, 3, 5); Joe Giella (chapters 2, 4)
||in Justice League of America (DC, 1960 series) #48 (November-December 1966); in Justice League of America Archives, The (DC, 1992 series) #1; in Showcase Presents: Justice League of America (DC, 2005 series) #1