- Gardner Fox
- Mike Sekowsky
- Bernard Sachs
- Ira Schnapp (pg. 1 only); Gaspar Saladino
- Justice League of America [Aquaman; Atom [Ray Palmer]; Batman; The Flash [Barry Allen]; Green Arrow; Green Lantern [Hal Jordan]; Hawkman [Katar Hol] (joins); Martian Manhunter [J'onn J'onzz]; Snapper Carr; Superman; Wonder Woman]; Hawkgirl (cameo); Joe Perry (villain); Super-Duper (villain)
- Hawkman's first case as a member of the JLA involves low-level crook Joe Parry who has come into possession of an alien machine with which he creates three different threats against the JLA.
Lettering credits from reprint in JLA Archives.
Story is told in three chapters: unnumbered part one (11.67 pp.), Part Two 3.67 pp.), Part Three (7.67 pp.)
Letters from Mike Friedrich (future comics writer), Kenneth S. Gallagher, Guy H. Lillian, Ken Ahlstrand.