Watch Ben 10: Ultimate Alien

Ben 10: Ultimate Alien is a series created by Duncan Rouleau, Joe Casey, Joe Kelly, and Steven T. Seagle. The show is produced and broadcast by the Cartoon Network Studios, as a sequel to its predecessor, Alien Force. Starring Yuri Lowenthal, Greg Cipes and Ashley Johnson, the series centers around Ben and Gwen, who are 16 year old, and the 17 year old Kevin.

A year after the Alien Force series, the Omnitrix was destroyed. Ben must now learn the Ultimatrix secrets. A larger version of the Omnitrix, the Ultimatrix allows for the alien forms to become more powerful, ultimate forms, in addition to his original abilities.

The first episode finds ten year old fan, Jimmy Jones, revealing Ben's secret identity. Ben becomes a celebrity and is hailed by kids as their hero. However, most adults distrust him as a potential threat.

Undaunted, Ben continues his battles against aliens with Grandpa Max, Kevin, Julie and Gwen. Ben finds five aliens who were kidnapped and attacked by Aggregor, an Osmosian villain.

After aliens Galapegus, Bivalvan, P'andor, Ra'ad and Andreas were captured, Aggregor embarked upon a search for the Map of Infinity. His goal was to find the Forge of Creation to absorb the infinite extraterrestial powers of the Celestialsapiens.

Kevin again becomes a nemesis after he is forced to absorb Ultramatrix energy. The energy causes him to become an egomaniac. However, he demonstrates that he is not completely evil, has a human heart, and still cares. Ultimately, Aggregor's actions are reversed and Kevin returns to normal.

The second season featured many individual stories, as opposed to one complete, serial plot line. The one main story line concerns the appearance of a very mysterious and dangerous character called Sir George, along with Diagon, a dimensional demon. Vilgax was defeated and its powers were absorbed by Diagon. Azmuth then appeared to request that Ben hand over the Ultimatrix and his sword. When he does this, he attains the new and Omnitrix.

The series has also aired in the United Kingdom, Asia, Australia and Latin America on the Cartoon Network. The show also featured an episode marathon with a contest event in the United States.

The show received a nomination for Animation of the Moonstruck episode from the Writers Guild of America.

The final episode that aired March 31, 2012 was dedicated to Dwayne McDuffie, who died during the production of this series.

Ben 10: Ultimate Alien is a series that ran for 5 seasons (62 episodes) between April 23, 2010 and on Cartoon Network