Seasons & Episodes
Season 1
26 episodes
E01
Independence Day
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.
E02
Fireworks
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.
E03
Welcome to Happy Harbor
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
E04
Drop-Zone
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?
E05
Schooled
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?
E06
Infiltrator
Green Arrow's niece, Artemis, joins Young Justice and must save a bright young scientist from the League of Shadows.
E07
Denial
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.
E08
Downtime
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.
E09
Bereft
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.
E10
Targets
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.
E11
Terrors
Miss Martian and Superboy go undercover at a Federal penitentiary where the world's most dangerous super-villains are kept under lock and key.
E12
Homefront
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.
E13
Alpha Male
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.
E14
Revelation
While the Justice League combats a worldwide outbreak of plant creatures, Batman sends Young Justice to deal with the villains responsible: the Injustice League.
E15
Humanity
Young Justice takes along their new friend Zatanna on their quest to find Red Tornado and learn if he's the mole.
E16
Failsafe
When the Justice League is defeated by alien invaders, and are presumed dead, Young Justice must step up to fight in their stead.
E17
Disordered
The Forever People come seeking a missing possession, called Sphere, which has undergone a bizarre transformation while with the young justice team.
E18
Secrets
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.
E19
Misplaced
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.
E20
Coldhearted
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.
E21
Image
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?
E22
Agendas
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.
E23
Insecurity
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.
E24
Performance
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.
E25
Usual Suspects
A new member joins Young Justice just as they must face internal struggles as the moles make their identities clear.
E26
Auld Acquaintance
Young Justice takes on its most dangerous enemy after they discover who within the team is the traitor.
Season 2
20 episodesSeason 3
26 episodesSeason 4
26 episodes
Stephanie Lemelin
as Tigress / Artemis Crock
Bruce Greenwood
as Batman
Jesse McCartney
as Robin
Danica McKellar
as Miss Martian
Nolan North
as Superboy
Khary Payton
as Black Lightning / Jefferson Pierce
Khary Payton
as Aqualad
Stephanie Lemelin
as Computer
Nolan North
as Superman
Jason Spisak
as Kid Flash
George Eads
as Flash
Crispin Freeman
as Guardian
