Justice League of America [Aquaman; Wonder Woman; Superman; Green Lantern [Hal Jordan]; Batman; The Flash [Barry Allen]; Martian Manhunter [J'onn J'onzz]]; Starro (villain)
Peter the Puffer Fish alerts Aquaman to an attack on Earth from an alien starfish named Starro the Conqueror. Starro has altered three ordinary starfish into his lieutenants. Aquaman alerts his friends Wonder Woman, Superman, Green Lantern, Batman, Flash, and J'onn J'onzz. Though Superman and Batman are too busy to attend, the rest meet and split up into teams.
The second starfish lieutenant steals a laboratory filled with a braintrust of scientists with the intent of absorbing their knowledge of earth science and defenses. Working to free the scientists, Wonder Woman and J'onn J'onzz discover that Starro's lieutenants can transfer absorbed power and knowledge to the others, as this Starro can now fire nuclear blasts.
The Flash [Barry Allen]; Starro (villain); Snapper Carr; John Carr
Flash faces his Starro duplicate in Happy Harbor where the entire populace have fallen under Starro's influence, except for one lone teenager. Flash defeats the third Starro lieutenant, learns where the real Starro is, and decides to let "Snapper" Carr join him for the showdown.
Justice League of America [Wonder Woman; Aquaman; Martian Manhunter; Green Lantern [Hal Jordan]; The Flash [Barry Allen]; Snapper Carr]; Starro (villain)
During the final battle, Flash and Green Lantern determine that Snapper is covered with lime, and that prevents Starro from affecting him. A few barrels of lime, and Starro becomes a souvenir for the JLA trophy room.
Justice League of America [The Flash [Barry Allen]; Green Lantern [Hal Jordan]; Wonder Woman; Aquaman; Martian Manhunter; Superman; Batman; Snapper Carr]; Amazo (villain); Professor Ivo (villain); Mirror Master (flashback)
As several JLAers experience a sudden power loss, Flash finds that someone has used powers like theirs to steal a European catfish and a cicada. Snapper suggests the thefts have to do with someone researching immortality, and the JLA splits up to investigate other long-lived creatures. In every case, the JLAers come up against Amazo, who steals their powers, defeats them, and takes them to his creator's lab, where Professor Ivo is preparing an immortality serum. Green Lantern is able to use the weakness of his own ring against Amazo and Ivo, restore the JLA's powers, and defeat the villain.
Justice League of America [The Flash [Barry Allen]; Superman; Martian Manhunter; Green Lantern [Hal Jordan]; Batman; Wonder Woman; Aquaman; Green Arrow; Snapper Carr]; Monty Moran (villain, flashback); Professor Menace (villain, flashback); Captain Cold (villain, flashback); Clock King / King Clock (villain, flashback); Electric Man (villain, flashback); Puppet Master (villain, flashback); Dr. Destiny (villain)
Green Arrow is put on trial for helping the enemies of the Justice League escape from capture.