Darkseid returns, though this time he isn't trying to enslave the Earth. Apokolips is being attacked by Brainiac and the only people who can stop him are the Justice League -- but will Superman let them help given their pasts...

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J'onn J'onzz has a crisis of conscience as the Justice League face a foe that may be unstoppable.

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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.

Superman, Hawkgirl, Flash, and Green Lantern are all trapped in dreams where they experience their deepest fears. J'onn goes into their minds with hopes of freeing them from these endless dreams as Batman goes after Dr. Destiny.

Wonder Woman befriends the Princess of Kasnia after saving her life. Soon after beginning their friendship, Wonder Woman discovers that the Princess is going to marry Vandal Savage.

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The justice league encounter their counterparts from another dimension. However, these "justice lords" have an altogether different approach to protecting humanity.

The justice league return to their own dimension to take on the justice lords, but to succeed they need the help of an unlikely ally.

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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 its own internal problems and non-cooperation, leaving them vulnerable to attack.

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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.

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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.

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