Batman and Superman team up to deal with an alien invasion, and a telepathic message leads the duo to a military base housing future ally J'onn J'onzz.

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.

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.

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.

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.

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.

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

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.

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.

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.

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 Justice Leaguers go their separate ways to celebrate the holiday season.

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 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.