The Flash must handle an onslaught of super-villains during the opening of a museum in his honor, and Batman and Orion lend a hand.
The League captures a dying Luthor, who breaks out of prison and assembles a group of villains to defeat the heroes.
Four incarcerated villains are released from prison by Cadmus to undertake an impossible mission: steal a powerful mystic artifact from the JLU Watchtower under the noses of the League.
Batman, Wonder Woman, and Green Lantern chase a time-travelling thief into the past and team up with some local "superheroes" of the era to deal with an outlaw who has used the thief's futuristic technology to take over an Old West town.
Batman doesn't like the looks of Carter Hall, Shayera's new boyfriend, when he learns that Carter has connections to Thanagar.
Hawkman and the Shadow Thief (from "Shadow of the Hawk") return and the secret behind both their existences is finally revealed.
Batman investigates a series of mysterious space signals and finds an alien conspiracy, while Superman is overwhelmed by telepathic alien messages as war-machines land and begin attacking Earth.
A new team of heroes, the Ultimen, help the Justice League defeat fire monsters that are attacking an oil rig. But the Ultimen soon discover that a dark secret lies at the heart of their origins and their sponsorship and turn against the League.
Believing that Green Lantern is receiving an unfair trial, the Leaguers investigate, while GL's superiors, the Guardians of the Universe, enter as witnesses. But the whole trial may be a ruse.
"No man escapes the Manhunters." An alien court sends the Manhunters to bring Green Lantern back for prosecution on the charge of genocide, and the League gets involved.
When Aquaman, ruler of Atlantis, decides he has had enough of the surface-dwellers trespassing in his ocean, the Justice League tries to smooth things over. Aquaman takes Superman's advice and arrives in New York City to speak to the World Assembly, but it soon becomes apparent that he may have been right about the surface-dwellers all along.moreless
Batman and Wonder Woman find themselves enmeshed in the schemes of Vandal Savage to take over the small country of Kasnia and use its space program to blackmail the world.
When nanotech-based alien robots land in the American southwest and overwhelm the League, only the Atom, a microscopic super hero, can defeat them.
When the Flash is mind-controlled into committing a crime, he and Green Lantern work to clear his name and uncover a sinister scheme.
Wonder Woman returns to Paradise Island to make up with her mother for her rapid departure, only to find the Amazons transformed to statues. The sorcerer Felix Faust is hold them hostage to force Diana to recover three ancient artifacts.
Richie is under Brainiac's control, while the League discovers a massive download and sends the Flash to track down Richie but he gets captured and "converted". The superspeed Flash slaps control units on the Leaguers but Static's powers short-circuit his thought-control disc, leaving him free. Static ends up fighting the League and slowly freeing them from the control discs, but giving Brainiac enough time to have a controlled Richie manufacture an attack vessel and host body (containing Richie), digitizing everything in Static's city. The League tell Static to go behind as they go after Richie – as the League battle Brainiac clones, Static gets hold of a remote controller for Gear's Backpack and he and Batman get close enough to use it to shut down Brainiac for good.moreless
A renegade Amazon, Aresia, leads a new incarnation of the Injustice Gang to accumulate the components for a bio-weapon.
An old friend of John Stewart's is inadvertently turned into a freak capable of altering his molecular structure, separating him from his girlfriend and pitting him against the League.
A cosmic super-string strikes the JLA Watchtower and Batman calls on Static to charge the damaged power core. The League helps Static against Puff and her new gang and then bring him and Gear up to the Watchtower. When the League are called away on an emergency, Gear and Static are left behind as a freed Brainiac unleashes havoc and plans to assimilate Earth. Gear gets off a signal to the Leaguers and they create a distraction while Static redrains the energy from the core. Gear fills up Brainiac's memory with a soundtrack, giving Static time to complete the plan. They succeed, unaware Brainiac downloaded himself into Gear's backpack. Brainiac launches an attack on Gear ... (to be continued ...)moreless
Superman and J'onn are taken prisoner during a rescue mission gone bad, and Superman is forced to compete in a gladiatorial tournament on a distant world while Hawkgirl and Green Lantern try to rescue them.