||Kanjar Ro (intro, villain); The Flash [Barry Allen]; Green Lantern [Hal Jordan]; Wonder Woman; Martian Manhunter; Aquaman; Batman; Superman; Snapper Carr; Hyathis (intro, villain); Kromm (intro, villain); Sayyar (intro, villain)
||Kanjar Ro forces the Justice League to help him defeat his enemies by freezing the people of Earth motionless. Only the combined voices of his enemies--Kromm, Hyathis, and Sayyar--saying "Kanjar Ro" can release them.
||Pencil and inks credits confirmed from Julius Schwartz's editorial records, provided by DC Comics, August 2008.
||in Justice League of America (DC, 1960 series) #48 (November-December 1966); in DC Special Blue Ribbon Digest (DC, 1980 series) #15 (November 1981); in Justice League of America Archives, The (DC, 1992 series) #1; in Showcase Presents: Justice League of America (DC, 2005 series) #1; in Super Adventure Comics (K. G. Murray, 1960 series) #63