Justice League Unlimited

The League expands their operations, enlisting new recruits across the globe. The newest of these is Green Arrow, who has repeatedly refused to respond to invitations to join the League. He is therefore pulled to the rebuilt, and much larger, Watchtower by teleport. Opting against joining, he hitches a ride back to Earth with the team of Green Lantern, Captain Atom and Supergirl, who have been sent on a mission to stop a giant, uncontrolled, nuclear-powered defense robot in an unnamed Asian country existing in self-imposed international isolation.

Batman and Wonder Woman find Superman held captive by Mongul in the Fortress of Solitude and dreaming of an idyllic life on Krypton, courtesy of a wish-fulfilling parasitic plant known as the Black Mercy.

Morgaine le Fey transforms Superman, Batman, Wonder Woman, and Green Lantern into children after Mordred uses his magic to remove all adults from Earth and keep children on the Earth.

Wonder Woman teams up with two super powered brothers, Hawk and Dove, to stop Ares' plans to escalate a European civil war by loosing a war machine called the Annihilator into the fray.

The centuries-old enchantress Circe transforms Wonder Woman into a pig as revenge against Diana's mother. Batman and Zatanna work together to return her to normal, while B'wana Beast attempts to find the "Wonder Pig" before she's butchered at a slaughterhouse. It contains the famous scene of Batman singing the jazz standard "Am I Blue?" to a nightclub audience.

Supergirl, Green Arrow, and The Question investigate Supergirl's disturbing dreams. They discover that Cadmus created a clone of Supergirl named Galatea while she was recovering from her fight against Superman on Earth.

The Justice League battle Mordru in the background, while the narrative follows Booster Gold as he attempts to close a walking black hole while he's supposed to be on "crowd control".

The full power of the newly expanded League is unleashed for the first time while trying to keep Ivo's android Amazo from reaching his goal: vengeance against the recently reformed Lex Luthor. Luthor and the Atom attempt to create a weapon to neutralize Amazo's nanotechnology, though their victory is largely assisted by Dr. Fate.

The Justice League meets the Ultimen, a popular group of young heroes. The Ultimen discover they are the results of a government experiment in creating super humans and only have a short time to live. In frustration and anger, all but one Long Shadow strike out against the Justice League.

Most of the League battles with powerful alien nanotechnology, but realize that the waves of self-replicating robots cannot be simply destroyed. The diminutive Atom shrinks himself to stop the robots from the inside.

A trio of high school kids accidentally resurrect Solomon Grundy, reviving him more powerful than ever but with no memories of his past. Dr. Fate, Amazo, Aquaman, and Shayera assist League regulars stopping his rampage.

Batman, Wonder Woman, and Green Lantern chase Chronos to the past, where they team up with some of the greatest DC heroes of the Old West. After defeating stolen future tech in that era, they again follow Chronos to the future. Warhawk from the Batman Beyond era is revealed to be Green Lantern's and Hawkgirl's son.

Batman, Green Lantern, and Wonder Woman chase Chronos into the future Gotham City of Batman Beyond, just in time to face a battle with a group of Jokerz beside that era's Justice League. The time travelers are taken to the Justice League Unlimited refuge. An older Bruce Wayne reveals the street gang they fought together was enhanced by Chronos who led them to kill the rest of the League of that era. The combined heroes defeat the retooled Jokerz, and Batman traps Chronos in a time loop.

Black Canary convinces Green Arrow to help save her mentor, Wildcat, from his involvement in an underground, super-powered fight club known as MetaBrawl.

Mister Miracle and Big Barda solicit Justice League assistance to free Oberon from Apokolips. J'onn refuses, but Flash decides to help out on his own.

Superman battles Doomsday in the heart of a volcano. Doomsday is revealed to be a modified clone of Superman. Batman probes the Cadmus conspiracy to destroy the Justice League.

A team of supervillains dubbed "Task Force X" (better known in comics as the Suicide Squad) composed of Deadshot, Plastique, Captain Boomerang, and the Clock King is recruited by Cadmus. They steal the Annihilator armour from the Watchtower.

Felix Faust, imprisoned in a mirror, fools Tala into letting him out, whereupon he possesses the Annihilator and casts Hades out of Tartarus. After her armor and lasso's full powers are activated by Hippolyta, Wonder Woman teams up with Hawkgirl to help Hades reclaim his kingdom at Zeus's command. Meanwhile Wonder Woman and Hawkgirl must deal with their anger towards each other following the events of "Starcrossed".

Huntress is kicked out of the Justice League for attempting to murder mob boss Steven Mandragora, the man responsible for her parents' death. She recruits the Question to assist her in finishing him off while Green Arrow and Black Canary attempt to thwart their efforts.

Lex Luthor's candidacy for president moves forward as Captain Marvel appears to endorse his candidacy. Luthor expertly manipulates Superman's mistrust, tricking Superman into fighting Marvel. Superman was humiliated after knowing that the bomb he defused turned out to be a generator. At the end, it is revealed by Batman that Superman had been baited by Luthor and Amanda Waller to discredit the JLU.

When the Justice League receives a distress call, Hawkgirl, Vigilante and Vixen investigate only to find that it was a trap set out by the remaining Thanagarian warriors who blame Hawkgirl for their loss in the war (as recounted in "Starcrossed"). Likewise, Hawkgirl has to deal with her teammates' resentments for her betrayal of the Justice League and her own, still-lingering self-doubts.

After helping Superman defeat Mantis, Captain Atom's Air Force Reserve commission is reactivated. Meanwhile, the Question discovers the records about the Justice Lords, and Luthor's attempts to discredit the Justice League. The Question is captured, and Superman and Huntress attempt to rescue him. Almost successful, they are confronted by Captain Atom, who has orders to stop them.

Lex Luthor seizes control of the Watchtower's main gun to fire on Cadmus, causing massive collateral damage on the city and falsely implicating the League as responsible. Convinced it is an act of revenge, Amanda Waller commands Galatea to attack the Watchtower with an army of Ultimen clones.

The founding members of the Justice League, with the exception of Batman, surrender to the government. In the middle of a huge battle between the "Unlimited" part of the League and the army of Ultimen, Supergirl and Steel battle Galatea to keep her from destroying the Watchtower.

With most of the League unavailable, the League's original seven battle against the fused Luthor and Brainiac. It is then up to the Flash to stand up against the Luthor-Brainiac team, and he is prepared to pay the final price. In desperation, Flash pushes his powers to their limit, running as fast as he can around the world numerous times and tapping into the Speed Force in order to separate and defeat the two villains. As a result, Flash is very nearly pulled into the Speed Force, but is rescued by the teamwork of his teammates. The incident leaves Flash with the disturbing possibility that traveling that fast again might mean he would never come back.

In the future of Batman Beyond, Amanda Waller reveals to an older Terry McGinnis she created the project Batman Beyond to continue Bruce Wayne's work.

After Lex Luthor escapes from prison, Gorilla Grodd baits him into joining the new Secret Society with a piece of Brainiac technology. Luthor, the Key, and Doctor Polaris steal the Spear of Longinus from Blackhawk Island despite the efforts of Flash, Fire whom Flash had a crush on at the time, Shayera, and the last surviving Blackhawk to stop them.

Shayera agrees to meet with Carter Hall, an archaeologist who has discovered Thanagarian artifacts from ancient Egypt. With a suspicious Batman eavesdropping, Carter reveals himself to be her reincarnated lover from the past and Hawkman to a confused Shayera. The Shadow Thief attempts to steal the artifacts, which results in the destruction of the tomb, and leaves the question unresolved.

Supergirl, Stargirl, S.T.R.I.P.E., and Green Lantern help Warlord liberate Skartaris (a hidden world inside the Earth's core) from Deimos, a brutal dictator while protecting a very large piece of Kryptonite from Metallo and Silver Banshee.

Wonder Woman protects the body of the Viking Prince from Legion agents who want it for reverse engineering of invulnerability powers. Troubled by his isolation, J'onn leaves the Justice League to better understand humanity.

Orion attempts to understand Flash's antics as Wally and Batman battle four of Flash's rogues that attack the museum that is opening in his honor. Even though the new museum was all but wrecked, the occasion still turned out to be a "good day," according to Flash.

Deadman convinces Superman, Batman, and Wonder Woman to help him retrieve the stolen souls of a mystic order of monks that the Secret Society has stolen. They force the Secret Society to retreat from Gorilla City, ending Grodd's attempt to turn all people on Earth into apes. Back at a general meeting in the Secret Society's HQ, Lex Luthor cites that Grodd's plan failed and his "master plan" (turning everyone on Earth into apes) was silly, and shoots him, taking over leadership of the Secret Society.

General Wade Eiling from Cadmus steals the "Captain Nazi" super-soldier serum and injects it into himself to "protect" the world from metahumans. With the more powerful League members busy, Green Arrow leads Stargirl, S.T.R.I.P.E., Shining Knight, Crimson Avenger, Vigilante, and Speedy against him. Eiling only stops short of killing Shining Knight when a civilian points out that Eiling's reason for attacking the heroes is non-existent, as his entire reason for the attack was to rid the world of meta-humans and he was the only one there with super powers.

Magic and science collide, placing Lex Luthor and Flash's minds in each other's body. The Justice League must now contain a super-speed powered Luthor on the Watchtower while Flash tries to hide the reversal from the Secret Society.

Roulette restarts Metabrawl, this time with an all-female fight card ("Glamour Slam") made up of mind-controlled Justice Leaguers. First, the Huntress and Black Canary are set against Vixen and Hawkgirl, and then the four must contend against Wonder Woman.

Supergirl, Green Lantern and Green Arrow are kidnapped and taken to the 31st Century by Brainiac 5 and Bouncing Boy of the Legion of Super-Heroes, where Supergirl is destined to embark on her very last mission – a battle against the Fatal Five and the Legion itself.

The Hawkman story concludes here when Shadow Thief captures Green Lantern, Shayera and Hawkman, then forces them to watch a vision of their past selves developing an ancient society of Egypt with Thanagarian technology. It turns out Shadow Thief is a villain from Carter Hall's mind that was released when he touched the Absorbacron in "Shadow of the Hawk." Hawkman defeats Shadow Thief and leaves. John Stewart, not wanting to have destiny play out his life, does not get back with Shayera, even though the two say they love each other. GL goes back to Vixen, but not before he tells Shayera about Rex Stewart (Warhawk), their alleged future son. In the final scene of the episode, Shayera asks Batman about this future son, but the credits roll before he can answer.

Luthor and the Secret Society refit their headquarters and fly into deep space in a last-ditch attempt to reanimate Brainiac. En route, Tala frees Grodd, who leads a mutiny of other disaffected villains against Luthor and his supporters. Luthor uses his intellect and resourcefulness to counter his various adversaries' powers; Grodd's mind-control ability is used against him, forcing him to step into an airlock, from which he is released into the void. Luthor uses Tala's magic in an attempt to reconstitute Brainiac, but instead resurrects Darkseid (with Brainiac enhancements), who makes clear his plans to lay waste to Earth before destroying the Secret Society's headquarters. Darkseid returns to Apokolips just in time to stop a war between the two factions of his Elite fighting for power, and reveals to them his plans of massive invasion. Luthor and the surviving Secret Society members turn to the Justice League for help.

The Justice League reluctantly teams up with the remnants of the Secret Society to repel Darkseid's full-scale invasion of Earth. As the League and Secret Society members battle the Apokolips fleet across the planet, Superman, Batman, and Lex Luthor take on Darkseid atop the Daily Planet building.