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Go BackBen 10: Ultimate Alien

Ben 10: Ultimate Alien Season 1

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Here's where to watch every episode of Ben 10: Ultimate Alien season 1. Mouseover or tap an episode to see where to stream it. Click or tap the play icon to stream it on the best available service.
Season 01, Episode 01 Fame

S01 E01

Apr 23, 2010
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Fame Apr 23, 2010 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.

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Season 01, Episode 02 Duped

S01 E02

Apr 30, 2010
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Duped Apr 30, 2010 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.

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Season 01, Episode 03 Hit 'Em Where They Live

S01 E03

May 7, 2010
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Hit 'Em Where They Live May 7, 2010 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.

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Season 01, Episode 04 Computer Games

S01 E04

May 14, 2010
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Computer Games May 14, 2010 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.

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Season 01, Episode 05 Escape from Aggregor

S01 E05

May 21, 2010
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Escape from Aggregor May 21, 2010 The team encounters another alien who escaped from Aggregor and, through him, learns more about Aggregor's goals.

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Season 01, Episode 06 Too Hot to Handle

S01 E06

May 28, 2010
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Too Hot to Handle May 28, 2010 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.

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Season 01, Episode 07 Andreas' Fault

S01 E07

Jun 4, 2010
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Andreas' Fault Jun 4, 2010 Then team encounters another of Aggregor's escaped prisoners, Andreas, whom Argit is using as part of a scheme against the Forever Knights.

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Season 01, Episode 08 Fused

S01 E08

Jun 11, 2010
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Fused Jun 11, 2010 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.

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Season 01, Episode 09 Hero Time

S01 E09

Jun 18, 2010
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Hero Time Jun 18, 2010 Ben meets his hero, Captain Nemesis, who's become jealous of all the attention Ben attracts.

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Season 01, Episode 10 Ultimate Aggregor

S01 E10

Oct 10, 2010
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Ultimate Aggregor Oct 10, 2010 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.

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Season 01, Episode 11 Map of Infinity

S01 E11

Oct 10, 2010
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Map of Infinity Oct 10, 2010 Aggregor has absorbed all the powers of his captured aliens. Now he's after the Map of Infinity.

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Season 01, Episode 12 Reflected Glory

S01 E12

Oct 15, 2010
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Reflected Glory Oct 15, 2010 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.

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Season 01, Episode 13 Deep

S01 E13

Oct 22, 2010
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Deep Oct 22, 2010 Aggregor is after the next piece of the map on a watery planet.

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Season 01, Episode 14 Where the Magic Happens

S01 E14

Oct 29, 2010
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Where the Magic Happens Oct 29, 2010 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.

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Season 01, Episode 15 Perplexhahedron

S01 E15

Nov 5, 2010
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Perplexhahedron Nov 5, 2010 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.

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Season 01, Episode 16 The Forge Of Creation

S01 E16

Nov 12, 2010
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The Forge Of Creation Nov 12, 2010 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.

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Season 01, Episode 17 Nor Iron Bars A Cage

S01 E17

Nov 19, 2010
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Nor Iron Bars A Cage Nov 19, 2010 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.

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Season 01, Episode 18 The Enemy of My Enemy

S01 E18

Dec 3, 2010
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The Enemy of My Enemy Dec 3, 2010 Argit asks Ben and Gwen for protection from Kevin, so they take him to the nearest Plumbers Academy, but that won't stop Kevin.

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Season 01, Episode 19 Absolute Power Part 1 of 2

S01 E19

Dec 10, 2010
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Absolute Power Part 1 of 2 Dec 10, 2010 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.

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Season 01, Episode 20 Absolute Power Part 2 of 2

S01 E20

Dec 10, 2010
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Absolute Power Part 2 of 2 Dec 10, 2010 Final confrontation with Kevin. While Gwen makes a last ditch effort to save Kevin, Ben fights an all out battle with Kevin.

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