Episode guide
Ben 10: Ultimate Alien: Season 1
20 episodes · premiered Apr 23, 2010
TMDB has no overview for this season.
- Episode 1: Fame Apr 23, 2010 · 23m Ben's secret is out. As Ben deals with his newfound fame, a new threat emerges as a thief steals parts of a new advanced spaceship from NASA.
- Episode 2: Duped Apr 30, 2010 · 23m Ben is supposed to attend a tournament to support his girlfriend, but the Forever Knights are trying to break into a museum. Ben tries to use the Ultimatrix to handle all his obligations.
- Episode 3: Hit 'Em Where They Live May 7, 2010 · 23m After Jimmy Jones reveals Ben's identity, some of his enemies (such as Zombozo, Rojo, Charmcaster, Vulkanus, and Sevenseven) team up to try to attack his family. Now Ben and his friends…
- Episode 4: Video Games May 14, 2010 · 23m Ben gets an offer to star in his own video game, but the designer's real motives are part of a plan to destroy Ben.
- Episode 5: Escape from Aggregor May 21, 2010 · 23m The team encounters another alien who escaped from Aggregor and, through him, learns more about Aggregor's goals.
- Episode 6: Too Hot to Handle May 28, 2010 · 23m P'Andor, escaped from Aggregor, now wants help to escape his encapsulating suit, but Kevin's the first to perceive that that's a fatally bad idea.
- Episode 7: Andreas' Fault Jun 4, 2010 · 23m Then team encounters another of Aggregor's escaped prisoners, Andreas, whom Argit is using as part of a scheme against the Forever Knights.
- Episode 8: Fused Jun 11, 2010 · 23m Ra'ad, the last of Aggregor's escaped prisoners, attacks Ben and informs the team of the true fate of his comrades. He finds a safe hiding place but one that endangers Ben in the process.
- Episode 9: Hero Time Jun 18, 2010 · 23m Ben meets his hero, Captain Nemesis, who's become jealous of all the attention Ben attracts.
- Episode 10: Ultimate Aggregor Oct 10, 2010 · 23m Aggregor has all five aliens. The Plumbers manage to disable Aggregor's ship, forcing Aggregor to find a new way to absorb their powers. The team makes a last ditch effort to save the…
- Episode 11: Map of Infinity Oct 10, 2010 · 23m Aggregor has absorbed all the powers of his captured aliens. Now he's after the Map of Infinity.
- Episode 12: Reflected Glory Oct 15, 2010 · 23m Cash and JT convince the team to allow them to take credit for the team's actions so they can earn money for Cash's mother's operation.
- Episode 13: Deep Oct 22, 2010 · 23m Aggregor is after the next piece of the map on a watery planet.
- Episode 14: Where the Magic Happens Oct 29, 2010 · 23m Aggregor escapes to a magical dimension. Gwen asks for Charmcaster's help to pursue him. The team learns about Charmcaster's past and why she's willing to help them now.
- Episode 15: Perplexhahedron Nov 5, 2010 · 23m With the fourth piece of the Map of Infinity almost in Aggregor's clutches, the gang chase him through the artificial planetoid known as Perplexahedron.
- Episode 16: The Forge of Creation Nov 12, 2010 · 23m As the team makes its final attempt to stop Aggregor, they find an unexpected ally, and one person will make a fateful decision with lasting repercussions.
- Episode 17: Nor Iron Bars a Cage Nov 19, 2010 · 23m Kevin's out for payback on anyone who has ever crossed him. His next stop is a prison in the Null Void. Ben and Gwen try to stop him, where Ben comes to a grim decision.
- Episode 18: The Enemy of My Enemy Dec 3, 2010 · 23m Argit asks Ben and Gwen for protection from Kevin, so they take him to the nearest Plumbers Academy, but that won't stop Kevin.
- Episode 19: Absolute Power (1) Dec 10, 2010 · 23m Kevin starts going after Plumbers kids to gain more power. Ben and Gwen continue to argue about how to handle the situation. Gwen tries to find someone who will help her cure Kevin.
- Episode 20: Absolute Power (2) Dec 10, 2010 · 23m Final confrontation with Kevin. While Gwen makes a last ditch effort to save Kevin, Ben fights an all out battle with Kevin.