JLA: Justice League of America is a spin-off series of Smallville focusing on the adventures of the Justice League. It's set after the events of Finale.
Shortly after the Apokolips crisis, Superman disappears without a trace prompting Oliver Queen/Green Arrow to take command of the league as a new wave of supervillains begin their rampage.
- Justin Hartley - Oliver Queen/Green Arrow
- Phil Morris - John Jones/Martian Manhunter
- Alaina Huffman - Dinah Lance/Black Canary
- Alan Ritchson - Arthur Curry/Aquaman
- Kyle Gallner - Bart Allen/Impulse
- Laura Vandervoort - Kara Kent/Supergirl
Rising Justice (Part 1) - When Superman disappears the JLA begins a global search for him, however the League's efforts are hindered by the arrival of Starro the Conqueror. After a brutal fight Starro apparently kills Aquaman forcing the team to withdraw as the Conqueror and his mind-controlled slaves begin their assault on Metropolis.
Rising Justice (Part 2) - The JLA attacks Starro again but they prove no match for the interstellar mastermind. To their aid comes Kara Kent/Supergirl and the very much alive Aquaman with an army of sea creatures. Together the League frees Starro's victims from his control and Supergirl and the Martian Manhunter toss the villain into space. Starro is defeated but vows to return one day.
A Change in the Weather - Unususal weather patterns across the globe indicate that a weather manipulation on a massive scale is caused by Mark Mardon/Weather Wizard who threatens to destroy Metropolis with a tornado unless he receives a 10 billion dollar ransom. Impulse disperses the Wizard's hurricane by running opposite to its rotation, before the rest of the team seperate him from his Weather Wand rendering him powerless.
Bizarra - The Phantom Bizarro has survived his destruction in "Persona" and has now taken the form of Kara, forcing her into a confrontation with the new incarnation of this mimicking foe. 'Bizarra' is defeated by being forced to absorb red kryptonite causing her to become inhibited but it's only a matter of time before it wears of and she turns evil again.
Act of God (Part 1) - A strange black light event renders Impulse and Black Canary powerless as well as depowering every meteor freak and metahuman (with the exception of Aquaman, Supergirl and the Martian Manhunter as their powers were part of their natural biology). With the JLA reduced to only four memebers, it's harder to fight injustice especially when Lex Luthor unleashes a cloud of refined fear gas (from Smallville episode "Scare"), causing mass panic throughout the city.
Act of God (Part 2) - With the rest of the League captured by Luthor, Bart and Dinah have to figure out how to save the day without their powers. Eventually the two infiltrate Lex' compound and, after a second black light event restores their powers, defeat Luthor.
Time and Yet Again - Oliver keeps experiencing the same day over and over while everyone else is oblivious to it all. He soon discovers that Epoch the Lord of Time is responsible and he plans to keep doing this until Oliver goes crazy and kills himself. With the aid of Booster Gold and his semi-understanding of Epoch's technology, Oliver breaks the Time Loop but Epoch vanishes.
Amazing - A supervillain named Amazo, who has the abillity to copy the powers of metahumans, is on the rampage in Gotham City. The League enlists the aid of the local superhero - Batman - in order to stop him before he becomes too powerful for the League to fight. Eventually Amazo is defeated and imprisoned in the Arkham Asylum.
Mxyzptlkated (Part 1) - A single handed robbery of Star City National Bank alerts the team to the fact that Metahuman Mikhail Mxyzptlk/Mr. Mxyzptlk has returned, more powerful than ever. When most of the League falls under his control Green Arrow and Impulse enlist the aid of part time JLA members Zatanna and Stargirl to stop Mxyzptlk.
Mxyzptlkated (Part 2) - Green Arrow, Impulse, Zatanna, and Stargirl confront Mr. Mxyzptlk and the mind-controlled members of the League. After freeing the team from Mxyzptlk's control Zatanna uses her powers to summon a swarm of locusts, apparently rendering him powerless once again.
Zoom - Bart Allen wakes up one day to discover that the JLA never existed and that the world is now lorded over by an evil speedster called Professor Zoom. With the aid of the Legion of Superheroes, Impulse travels back in time to prevent Professor Zoom from killing Oliver Queen thus preventing the existence of the League.
Injustice For All (Part 1) - When Superman suddenly reappears in the Watchtower he claims that he lost his memory and has no idea what happened to him for the past year. Just in time as Lex Luthor (aided by Bizarra and Professor Zoom) breaks the Weather Wizard and Amazo out of jail creating a new incarnation of the Injustice League. When the League confronts the villains, they are more than a little surprised when Superman seems to side with them, revealing that he's in fact Clark Luthor/Ultraman, the true mastermind behind the Injustice League's creation and that the real Superman has been trapped on Earth-2 all along.
Injustice For All (Part 2) - The Martian Manhunter travels to Earth-2 to rescue Superman as the rest of the league battle the supervillains on Earth-1. Eventually Superman uses the (repaired) Earth-2 mirror box to return himself and Ultraman to their respective universes and help defeat the Injustice League. Suddenly Brainiac 5 briefly appears warning the Superman that "something is coming".