The two-part Justice League episode "Tabula Rasa" debuted on this day (Oct. 4) in 2003! Lex Luthor, in failing health, unleashes Amazo upon the League, just as Martian Manhunter suffers a crisis of conscience, in this excellent second season outing! #JusticeLeague #JLUnlimited

The Justice League two-parter "Metamorphosis" debuted on this day (Oct. 4) in 2002! Metamorpho makes his first DCAU appearance here as Rex Mason is transformed into the classic hero in this nifty two-part origin tale from Justice League's first season! #JusticeLeague #JLUnlimited

The Justice League Unlimited episode "To Another Shore" debuted on this day (Sept. 24) in 2005! Written by Dwayne McDuffie and directed by Dan Riba, this fantastic fable finds Wonder Woman and the League battling the Legion of Doom for possession of an ancient ship! #JusticeLeague #JLUnlimited

The Justice League Unlimited episode "Chaos at the Earth's Core" debuted on this day (Sept. 24) in 2005! This fun adventure finds the League in Skartaris, a hidden world at the Earth's core, where they team-up with Warlord to depose an evil dictator! #JusticeLeague #JLUnlimited

The Justice League episode "A Knight of Shadows, Part One" debuted on this day (Sept. 20) in 2002. Kicking off a pretty solid two-parter, the Justice League teams with Etrigan the Demon to prevent Morgaine le Faye from obtaining the Sorcerer's Stone! #JusticeLeague #JLUnlimited

The Justice League Unlimited episode "The Return" debuted on this day (Sept. 18) in 2004. An absolutely fantastic first-season episode, directed by Joaquim dos Santos, the League races to stop the unstoppable Amazo from getting his hands on Lex Luthor! #JLUnlimited #JusticeLeague

The Justice League Unlimited episode "Shadow of the Hawk" debuted on this day (Sept. 17) in 2005. An intriguing episode, Hawkgirl's life is turned upside-down after she meets Carter Hall, an archeologist with surprising ties to her Thanagarian origins! #JusticeLeague #JLUnlimited

The final season of Justice League Unlimited debuted on this day (Sept. 17, 2005) with "I Am Legion." Season three begins with a Brainiac-obsessed Lex Luthor joining the Legion of Doom while the League and the Blackhawks reunite for a crucial mission! #JusticeLeague #JLUnlimited

The Justice League Unlimited episode "The Greatest Story Never Told" debuted on this day (Sept. 11) in 2004! This super-fun episode from season one finds Booster Gold stumbling across a world-ending threat while handling "crowd control" for the League! #JLUnlimited #JusticeLeague

The Justice League episode "Injustice For All, Part 1," debuted on this day (Sept. 6) in 2002. A kick-off to a pretty great two-parter, Lex Luthor and The Joker make their respective Justice League series premieres here as an ill Lex plots his revenge! #JusticeLeague #JLUnlimited