Justice League Unlimited on Cartoon Network

Season 3, Episode 13
The world's greatest superheroes are back, banding together to defend the universe against chaos. The excitement is nonstop as an incident causes the minds of Lex Luthor and the Flash to be swapped. And when a devastating battle on Earth and in space reveals the power behind the villains, it could lead to the most unexpected team-up in Justice League history.

Season 2, Episode 13
In a world of alien invasions, sorcerers, vast shadowy conspiracies and ancient gods, the galaxy's most powerful superheroes have banded together to protect the universe, calling in favors from Green Arrow, the Atom, Hawk and Dove and others. Carl Lumbly (Alias), Phil LaMarr (Futurama) and Michael Rosenbaum (Smallville) and more lend their voices to bring these fearless characters to life.

In this action-packed animated series, the World's Greatest Super Heroes, including Superman, Batman, Wonder Woman, Green Lantern, The Flash, Hawkgirl and Martian Manhunter, join forces as the Justice League to battle powerful villains, supernatural creatures and evil entities determined to take over the world and destroy the League.

In this action-packed adventure series, the world's greatest superheroes, including Superman, Batman, Wonder Woman, Green Lantern, The Flash, Hawkgirl and Martian Manhunter, join forces as the Justice League to battle powerful villains...