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"Ben 10: Ultimate Alien" is an American animated television series and the fourth installment in the Ben 10 franchise. The series premiered on April 23, 2010, and concluded on March 31, 2012.
The series takes place after the events of "Ben 10: Alien Force". Ben Tennyson (voiced by Yuri Lowenthal) is now 15 years old and has been keeping a low profile regarding his alien transformations. However, his secret is soon revealed to the public by a villainous character named Will Harangue, who seeks to expose Ben's identity.