1. Independence Day
Air date: 2010-11-26 · 30 min
Robin, Aqualad, Kid Flash, and Speedy are finally ready to join the Justice League as full members. However, they soon discover that are to be treated as "junior members." An enraged Speedy leaves, while the other three strike out on their own to investigate a mysterious fire at Cadmus Laboratories. The trio soon discovers that Cadmus conceals a major conspiracy, and one of its goals is to create a clone of Superman for their own ends.
Open episode 1 ↗2. Fireworks
Air date: 2010-11-26 · 30 min
Kid Flash, Robin, and Aqualad are captured by the Cadmus genomorph forces, which prepare to clone them and dispose of the originals. Their only hope is the Superman clone, "Superboy", who must choose between freedom and subservience to those who created him.
Open episode 2 ↗3. Welcome to Happy Harbor
Air date: 2011-01-21 · 30 min
Speedy refuses to join the team, leading the members of Young Justice to wonder if their team is nothing more than a big joke to keep the young heroes "in their place". Meanwhile, Miss Martian feels that she doesn't belong on the team. The team battles a villain named Mister Twister, who they mistakenly believe is really Red Tornado testing them
Open episode 3 ↗4. Drop-Zone
Air date: 2011-01-28 · 30 min
Batman sends Young Justice on its first official mission, to investigate a neo steroid called Venom. The heroes ultimately find themselves in the middle of a small war between Bane and the Cobra Cult. Meanwhile, the heroes realize they need a team leader - but who will it be?
Open episode 4 ↗5. Schooled
Air date: 2011-02-04 · 30 min
The lack of relationship and interaction with Superman angers Superboy, leading him to lose control of his anger and decline training with Black Canary. When Young Justice encounters an opponent that even their Justice League superiors have experienced difficulty in defeating, will Superboy decide to help the team?
Open episode 5 ↗6. Infiltrator
Air date: 2011-02-11 · 30 min
Green Arrow's niece, Artemis, joins Young Justice and must save a bright young scientist from the League of Shadows.
Open episode 6 ↗7. Denial
Air date: 2011-02-18 · 30 min
Young Justice investigates the disappearance of Kent Nelson, the former Dr. Fate. Meanwhile, Kid Flash, who doesn't believe in magic, must defeat Abra Kadabra and Klarion the Witch Boy to obtain the Helmet of Fate.
Open episode 7 ↗8. Downtime
Air date: 2011-03-04 · 30 min
After a team mission goes badly, Aqualad returns to Atlantis to reconsider his role as team leader, or whether he should pursue personal interests. However, he soon discovers that there is no escaping his destiny.
Open episode 8 ↗9. Bereft
Air date: 2011-03-11 · 30 min
Young Justice discovers that they have forgotten the last six months of their lives, including each other and a final fateful mission in Bialya. The team turns to Miss Martian to recover their memories, before it is too late for Superboy.
Open episode 9 ↗10. Targets
Air date: 2011-09-16 · 30 min
Red Arrow rejects Young Justice's help and attempts to prevent the League of Shadows from starting a war. Ultimately he finds himself working with an even deadlier ally to fight the League's assassins, Lex Luthor.
Open episode 10 ↗11. Terrors
Air date: 2011-09-23 · 30 min
Miss Martian and Superboy go undercover at a Federal penitentiary where the world's most dangerous super-villains are kept under lock and key.
Open episode 11 ↗12. Homefront
Air date: 2011-09-30 · 30 min
The non-powered Robin and Artemis are the only members of Young Justice who can stand against mysterious invaders who come after the team in their home base.
Open episode 12 ↗13. Alpha Male
Air date: 2011-10-07 · 30 min
Aqualad's teammates discover that he held vital information from them concerning the presence of a mole, sowing the seeds of mistrust. While attempting to deal with their internal issues, the team is sent to India to investigate reports of armed animals attacking human beings... and Batman puts Captain Marvel in charge of the group.
Open episode 13 ↗14. Revelation
Air date: 2011-10-14 · 30 min
While the Justice League combats a worldwide outbreak of plant creatures, Batman sends Young Justice to deal with the villains responsible: the Injustice League.
Open episode 14 ↗15. Humanity
Air date: 2011-10-21 · 30 min
Young Justice takes along their new friend Zatanna on their quest to find Red Tornado and learn if he's the mole.
Open episode 15 ↗16. Failsafe
Air date: 2011-11-04 · 30 min
When the Justice League is defeated by alien invaders, and are presumed dead, Young Justice must step up to fight in their stead.
Open episode 16 ↗17. Disordered
Air date: 2011-11-11 · 30 min
The Forever People come seeking a missing possession, called Sphere, which has undergone a bizarre transformation while with the young justice team.
Open episode 17 ↗18. Secrets
Air date: 2011-11-18 · 30 min
Artemis and Zatanna decide to go partying on Halloween night, only to discover that a youthful assassin, Harm, has set his sights on them. Meanwhile, Miss Martian and Superboy take Kid Flash to their high school Halloween dance.
Open episode 18 ↗19. Misplaced
Air date: 2012-03-03 · 30 min
Young Justice, Zatanna, and Captain Marvel's alter-ego Billy Batson are the only ones on Earth who can save the day when five villainous sorcerers make every adult on the planet disappear.
Open episode 19 ↗20. Coldhearted
Air date: 2012-03-10 · 30 min
On his birthday, Kid Flash is forced to go on what is supposed to be a simple delivery mission, rather than battle with the Justice League. However, he soon discovers the mission is anything but simple.
Open episode 20 ↗21. Image
Air date: 2012-03-17 · 30 min
When the team returns to the Middle East on a mission to Qurac, Miss Martian must face her secrets... but will doing so save the team or destroy them?
Open episode 21 ↗22. Agendas
Air date: 2012-03-24 · 30 min
Superboy discovers that he may not be alone when he learns that Cadmus created another clone of Superman. Meanwhile, the League votes on new members.
Open episode 22 ↗23. Insecurity
Air date: 2012-03-31 · 30 min
Artemis discovers that she's out in the cold when Red Arrow returns to Young Justice to help them track down Sportsmaster... who is tied to her mysterious past.
Open episode 23 ↗24. Performance
Air date: 2012-04-07 · 30 min
Young Justice tries to find a thief using the Haly International Traveling Circus as cover for his activities, by going undercover as trapeze performers, but find much more.
Open episode 24 ↗25. Usual Suspects
Air date: 2012-04-14 · 30 min
A new member joins Young Justice just as they must face internal struggles as the moles make their identities clear.
Open episode 25 ↗26. Auld Acquaintance
Air date: 2012-04-21 · 30 min
Young Justice takes on its most dangerous enemy after they discover who within the team is the traitor.
Open episode 26 ↗