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.

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.

The Justice League is forced to ally with Darkseid against an enemy powerful enough to threaten both Earth and Apokolips.

The League are forced to battle both Darkseid and Brainiac, while Wonder Woman and Batman seek the aid of Orion, son of Darkseid.

Lex Luthor, on the run from the League, reactivates an old LexCorp project to stop the League - an android that can duplicate the powers of anyone it sees.

Even Superman is unable to defeat the android once it duplicates all of the League's powers. Only with the aid of J'onn, suffering a crisis of faith when he is overwhelmed by humanity's pettiness during a telepathic scan, can they turn Amazo against Lex.

The Justice League must deal with a prison break, unaware that prisoner John Dee is using the distraction to gain access to an experimental ESP machine and gain the power to manipulate dreams.

Four of the Leaguers are trapped in their dreams by Dr. Destiny - only J'onn and Batman can rescue them...if they don't fall asleep first.

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.

Batman and Wonder Woman move against Kasnia to prevent Vandal Savage from terrorizing the world with his orbital rail gun.

John Stewart leaves on a mission to help his fellow Green Lanterns overthrow a intergalactic dictator with strange powers.

Despero's followers attack and John is forced to use a gun when his ring becomes useless due to Despero's mental tampering. While John, Katma, and Hawkgirl are captured, J'onn, Kilowog, and Flash must try to deactivate the mystic flames and deprive Despero of his power.

The Justice Lords, an alternate version of the League from a different dimension, capture their counterparts and plan to bring their own brand of justice to the new Earth.

The Justice League must escape from their imprisonment at the hands of the Justice Lords and defeat their counterparts with the help of an unlikely ally.

A strange gemstone possesses all who touch it, turning them to evil...including Wonder Woman.

The League discover the secret behind the "Black Heart" gem, but everyone except the Flash is possessed, and he must save the day before the sun is destroyed.

After Aquaman frees Solomon Grundy, Hawkgirl and the Justice League are convinced that the Lord of Atlantis has gone rogue. But when the trail leads them to the mysterious Dr. Fate, they discover there is more to this strange partnership than meets the eye.

With the initial ritual destroyed, the League, Fate, and Grundy must travel into the dimension of the Old Ones while Aquaman fights the invaders in the Earth realm.

Gorilla Grodd brings together a powerful team of villains, welding them together into a close-knit group. Meanwhile the League is plagued by it own internal problems and non-cooperation, leaving them vulnerable to attack.

The Secret Society take advantage of the League's break-up to bring them down until only Green Lantern remains to free his comrades. When he falls as well everything looks hopeless.

After Superman makes the ultimate sacrifice to save his fellow heroes, the Justice League and rest of the grieving planet must learn to live in a world without Superman.

Superman finds himself on a devastated future Earth with the man responsible - Vandal Savage.

In the ultimate reality show, the Joker pits the Justice League against the clock and against the Royal Flush Gang as the Justice League races to find and disarm all the bombs he's planted along the Strip in Las Vegas.

The League manage to defuse the Joker's bombs and defeat the four active members of the Royal Flush Gang...but the Joker has an Ace in the hole as he executes his real master plan.

In this one-part episode, the Justice Leaguers go their separate ways to celebrate the holiday season. After saving a distant planet, the League returns in time for Christmas. Clark and J'onn visit Smallville for a Kent family Christmas, Green Lantern and Hawkgirl have a snowball fight and visit an alien bar while comparing holiday traditions, and the Flash and Ultra-Humanite have a season's fight and are forced to ally together to save orphans' toys.

The Thangarians, Hawkgirl's people, arrive on Earth to aid them against the menace of the Gordanians. But all is not what it seems.

The League manage to escape and take refuge at Wayne Manor, while the Thanagarians scout the planet for them and realize their master plan for Earth.

The League defeats the squad of hawkmen sent to kill them at the Batcave, but must now figure out how to stop the activation of the hypergate before it destroys Earth.

Superman and Batman team up against alien invaders, but soon find they need to call in help.

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.

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.

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.

Betrayed by his own subjects, Aquaman and the League fight to save Atlantis, the world, and Aquaman's own son against his half-brother Orm's coup.

Wonder Woman returns to Paradise Island to make up with her mother for her rapid departure, only to find the Amazons transformed to statutes. The sorcerer Felix Faust is holding them hostage to force Diana to recover three ancient artifacts.

The League fight to save Paradise Island and Wonder Woman's own mother from Felix Faust and Lord Hades.

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.

Fight promoter and new contestant Mongul instructs Superman to throw the fight against him, or he'll destroy the enslaved Draaga's home planet.

When the Flash is mind-controlled into committing a crime, he and Green Lantern work to clear his name and uncover a sinister scheme.

When Gorilla Grodd mentally enslaves a city of humans and prepares to destroy Gorilla City, Green Lantern and Flash try to defeat him while the other Leaguers move to help the ape civilization.

A renegade Amazon, Aresia, leads a new incarnation of the Injustice Gang to accumulate the components for a bio-weapon.

When the male Leaguers are infected by the same disease sweeping Earth, Wonder Woman and Hawkgirl must defeat Aresia and find a cure.

An explosion throws four Leaguers into an alternate dimension where they meet their childhood comic book heroes...the Justice Guild!

The League aid the Justice Guild against their arch-nemeses while trying to unravel the secrets of the Guild's world.

Exposed as a criminal, sentenced to prison, and terminally ill due to long term kryptonite exposure, Lex Luthor escapes and assembles a supervillain team consisting of Cheetah, The Shade, Solomon Grundy, Star Sapphire, Copperhead, and Ultra-Humanite to take on the Justice League, calling themselves the Injustice Gang. The Joker also becomes part of the team, but on his own choice. However, this gang proves short-lived as its major weakness proves no match for Batman's wiles.

Exposed as a criminal, sentenced to prison, and terminally ill due to long term kryptonite exposure, Lex Luthor escapes and assembles a supervillain team consisting of Cheetah, The Shade, Solomon Grundy, Star Sapphire, Copperhead, and Ultra-Humanite to take on the Justice League, calling themselves the Injustice Gang. The Joker also becomes part of the team, but on his own choice. However, this gang proves short-lived as its major weakness proves no match for Batman's wiles.

The sorceress Morgaine Le Fey and her son Mordred search for the Philosopher's Stone, and the Justice League need the help of the Demon Etrigan to thwart her.

Morgaine and Mordred get the Stone and plan to transform England and restore it to its medieval glory.

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.

The League battle Metamorpho but soon discover that his future father-in-law, Simon Stagg, poses the true menace.

When the present is altered, the Justice League must travel back in time to World War II to restore history.

A separate League struggle against the Nazis and determine who is responsible for the Axis' technological advances.

Wonder Woman and Steve Trevor survive the attack and trick the Germans into believing that the communicator was destroyed. GL and Easy Co. find the runaway and discover that Vandal Savage plans to use jet aircraft to invade America. GL boards and tries to stop Vandal's plane while Hawkgirl, Superman, and Flash try to intercept the flight with J'onn's help. With the aid of the Blackhawks and Flash notifying the U.S. Navy, the German flight is shot down and Vandal apparently is killed. The JLA return to the present to find everything restored and Wonder Woman visits a now elderly Steve Trevor in the restored present.

An exciting "Never Seen Before" promo which helped Justice League leap into action.

Called to the Justice League Watchtower to help in a critical power problem, Static and Gear then have to help stop Brainiac's consciousness from seizing control of the station.

Static and the Justice League try to stop Braniac.