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Series

Ben 10: Ultimate Alien

201023m8.2 / 102 seasons

With his secret identity now revealed to the world, Ben Tennyson continues to fight evil as a superhero with the help of the newly acquired Ultimatrix.

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Available in US

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Season guide

Season 1

20 episodes available

Episode 1: Fame

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

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

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 have to protect them no matter what.

On screen

Cast & Characters

Yuri Lowenthal

Ben Tennyson (voice)

Ashley Johnson

Gwen Tennyson (voice)

Greg Cipes

Kevin Levin (voice)

Dee Bradley Baker

Humungosaur (voice)

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Episode 4: Video Games

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

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

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

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

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

23m

Ben meets his hero, Captain Nemesis, who's become jealous of all the attention Ben attracts.

Episode 10: Ultimate Aggregor

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 alien prisoners.

Episode 11: Map of Infinity

23m

Aggregor has absorbed all the powers of his captured aliens. Now he's after the Map of Infinity.

Episode 12: Reflected Glory

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

23m

Aggregor is after the next piece of the map on a watery planet.

Episode 14: Where the Magic Happens

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

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

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

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

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)

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)

23m

Final confrontation with Kevin. While Gwen makes a last ditch effort to save Kevin, Ben fights an all out battle with Kevin.