Magic and science collide, placing Lex Luthor and Flash's minds in each other's body. The Justice League must now contain super-speed powered Luthor on the Watchtower while Flash tries to hide the reversal from the Legion. Michael Rosenbaum who voices Flash in the JLU series, plays Lex Luthor in ...
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In the future, Amanda Waller reveals to an older Terry McGinnis that through her scientific manipulations, he is actually Bruce Wayne's genetic son. The final scene in this episode mirrors the first scene in Batman: The Animated Series, as the creative team thought it could possibly be the final ...
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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 they strike out against the Justice League. As a nod to fans who grew u...
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After Lex Luthor escapes from prison, Gorilla Grodd baits him into joining the new Legion of Doom with a piece of Brainiac technology. Luthor, the Key, and Doctor Polaris steal the Spear of Longinus from Blackhawk Island despite Flash, Fire, Shayera, and the last surviving Blackhawk's attempts to...
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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.
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On Supergirl's 21st birthday, she, Green Lantern, 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. It is cl...
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After saving two worlds, the members of the Justice League decide to take a break to celebrate the holidays. Flash spends his Christmas Eve with the children of an orphanage, who ask that he find them a special animated toy duck. The popular toy is broken by the Ultra-Humanite, who eventually com...
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The Justice League reluctantly teams up with the Legion of Doom in anticipation of an omega-level threat. Darkseid launches a full-scale invasion of Earth and the combined League and Legion battle para-demons across the planet. Meanwhile, Superman, Batman, and Lex Luthor take on Darkseid atop the...
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Luthor and the Legion refit the Hall of Doom and fly into deep space in a last-ditch attempt to reanimate Braniac. 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 ad...
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A trio of college 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. This episode marks the return of Shayera Hol to the Justice League, and features ...
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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-Braniac team, prepared to pay the final price.
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