Season 1 excels at balancing standalone episodes with an intricate, season-long mystery. From the very first episode, the question of who is "the mole" on the team hangs over every interaction and mission. The storytelling is top-notch, with plot points that pay off episodes or even the entire season later. The writing respects the audience's intelligence, creating a show that is both accessible to newcomers and rewarding for long-time DC fans.
Artemis joins the squad under mysterious circumstances, filling the archer role left open by Speedy.
The search for is a noble quest, but don't let the hunt for free content delay your enjoyment of one of the best animated series of the 21st century.
Depending on your region, Season 1 may be available as part of your standard subscription. The official young justice season 1 all episodes free
– The Team confronts their secrets at Santa Prisca, finally revealing the identity of the traitor in their midst.
– The world is split into two parallel dimensions: one containing only adults, and one containing only children.
The easiest path is (no subscription, just ads) or Max’s free trial (no ads, just a clock). As of 2025, these are the most reliable methods. Season 1 excels at balancing standalone episodes with
: You can find used or new copies at retailers like Amazon or GRUV for a one-time cost. Season 1 Episode Guide
Young Justice Season 1 All Episodes Free: Ultimate Streaming Guide
| Episode | Title | Original Air Date | Quick Synopsis | | :--- | :--- | :--- | :--- | | | Independence Day | Nov 26, 2010 | The sidekicks defy the Justice League to investigate Project Cadmus, where they make a startling discovery. This is a two-part premiere with "Fireworks". | | 2 | Fireworks | Nov 26, 2010 | The team must escape Cadmus while protecting Superboy and face the threat of the monstrous Blockbuster. | | 3 | Welcome to Happy Harbor | Jan 21, 2011 | The Team sets up their secret base in a cave in Happy Harbor and faces the psychic threat of the Scavenger and the psychotic Mr. Twister. | | 4 | Drop Zone | Jan 28, 2011 | The Team goes undercover in a local gang war to halt the distribution of a dangerous new drug called "Venom.". | | 5 | Schooled | Feb 04, 2011 | Superboy must face his insecurities and a rampaging Blockbuster when the team's fight comes to a school. | | 6 | Infiltrator | Feb 11, 2011 | Artemis joins the team on its first official mission to protect a scientist from the League of Shadows. | | 7 | Denial | Feb 18, 2011 | The Team must protect a man who holds the key to a powerful magical artifact, leading to a clash with mystical forces and the villainous Klarion the Witch Boy. | | 8 | Downtime | Mar 04, 2011 | As the team takes a break, Aqualad returns to Atlantis and is torn between his duties as a hero and his obligations as a son. | | 9 | Bereft | Mar 11, 2011 | The team wakes up in the hostile nation of Bialya with amnesia, having lost all memories of the past six months. They must rely on Miss Martian to recover their memories and complete their mission. | | 10 | Targets | Mar 18, 2011 | Robin, Speedy, and Green Arrow race to save a diplomat from assassination as the team uncovers more of the Light's intricate schemes. | | 11 | Terrors | Mar 25, 2011 | Superboy and Miss Martian go undercover as inmates at Belle Reve Penitentiary to uncover a breakout plot led by the mad scientists I.Q. and the Ultra-Humanite. | | 12 | Homefront | Apr 01, 2011 | A deadly attack on their headquarters leaves Robin and Artemis as the only ones to defend the cave and uncover the traitor in their midst. | | 13 | Alpha Male | Apr 08, 2011 | The team faces a new foe who can telepathically control animals, turning the world's wildlife against them. | | 14 | Revelation | Apr 15, 2011 | The various villains the team has faced join forces as the Injustice League, launching a global attack using plant-based monsters. | | 15 | Usual Suspects | Apr 22, 2011 | The team is put under intense scrutiny as their mentors, the Justice League, conduct a formal review of their operation and the identity of the mole is questioned. | | 16 | Failsafe | Apr 29, 2011 | Miss Martian's training simulation goes horribly wrong, trapping the team in a psychic nightmare of a world conquered by aliens. | | 17 | Disordered | May 06, 2011 | The team struggles with the psychological aftermath of the botched simulation, leading them to seek help from the legendary hero, the Phantom Stranger. | | 18 | Secrets | May 13, 2011 | On Halloween night, Artemis and Zatanna investigate a series of supernatural attacks and uncover the secret of Harm, a villain who murdered his own sister. | | 19 | Misplaced | Jun 10, 2011 | All the world's adults vanish, leaving only the team, Zatanna, and Billy Batson to stop Klarion the Witch Boy and four other powerful sorcerers. | | 20 | Coldhearted | Jun 17, 2011 | Kid Flash is forced to abandon a chance to fight alongside the Justice League for a simple delivery job—a decision that becomes critical when the fate of a nation hangs in the balance. | | 21 | Image | Jun 24, 2011 | Miss Martian's past comes back to haunt her when a dangerous clone of her uncle, Martian Manhunter, appears and threatens to expose her deepest secrets. | | 22 | Agendas | Sep 16, 2011 | Superboy goes to the Fortress of Solitude to find answers about his origins and must choose between his allegiance to the Team and the legacy of Superman. | | 23 | Insecurity | Sep 23, 2011 | Artemis's loyalties are questioned when a former enemy resurfaces, forcing her to confront her family's criminal past and prove she is not a traitor. | | 24 | Performance | Sep 30, 2011 | The Team goes undercover as circus performers to investigate a series of robberies, with Robin revisiting his past. Meanwhile, Superboy is captured and tortured, leading to a devastating secret coming to light. | | 25 | Usual Suspects | Oct 07, 2011 | Tensions erupt as the mole is finally revealed, and the team must stop a catastrophic plan that will reshape the balance of power between heroes and villains. | | 26 | Auld Acquaintance | Apr 21, 2012 | The Season 1 finale. After the shocking revelation of the mole, the team faces its greatest challenge yet when their own mentors, the Justice League, are mind-controlled and turned against them. | The writing respects the audience's intelligence, creating a
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