- Gardner Fox
- Dick Dillin
- Sid Greene
- Joe Letterese ?
- Justice League of America [Aquaman [Arthur Curry]; Atom [Ray Palmer]; Batman [Bruce Wayne]; Flash [Barry Allen]; Green Arrow [Oliver Queen]; Green Lantern [Hal Jordan]; Hawkman [Katar Hol; Carter Hall]; Superman [Clark Kent; Kal-El]; Wonder Woman [Diana Prince]; Snapper Carr (mascot)] (of Earth-1); Justice Society of America [Atom [Al Pratt]; Black Canary [Dinah Drake Lance]; Dr. Fate [Kent Nelson; Nabu]; Flash [Jay Garrick]; Green Lantern [Alan Scott]; Hawkman [Carter Hall]; Hourman [Rex Tyler]; Mr. Terrific [Terry Sloane]; Sandman [Wesley Dodds]] (of Earth-2, cameos); Red Tornado [John Smith]; Steve Trevor; Jean Loring; Hawkgirl [Shayera Thal; Shiera Hall]; Midge; Mera; Dr. Light [Arthur Light] (villain); Super-Duper (villain); The Diamond Creature (villain); Amazo (villain); Starro (villain); T. O. Morrow (villain)
- T. O. Morrow has defeated the JSA on Earth-2 as part of his overall plan. Now he tries to defeat the Justice League in order to stop his latest scheme, which involves his supercomputer stopping all of time itself, which would be fatal to all, since Morrow didn't want that to happen. The revived JLA and JSA teams then defeat Morrow's supercomputer's plot,and Morrow is later jailed.
Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics.
JLA-JSA team-up. Story across 23 pages, but page 8 is a 2/3-page and pages 16 and 23 are 1/2-pages.
- Julius Schwartz
letters submitted by Ronald Jennings; Frank Lasorsa; David Lewin