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Ben 10: Ultimate Alien Watch Online

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Watch Ben 10: Ultimate Alien Online

Watch the Latest Episode Online

Season 3, Episode 20

Genre: Science Fiction, Fantasy, Adventure

Premise: A year after Ben Tennyson defeated Vilgax, he's known the world over as a hero -- to kids, anyway. Adults are somewhat more suspicious. Armed with his mysterious new ``Ultimatrix,'' which can transform his aliens into their ``ultimate'' forms, Ben and his pals Gwen and Kevin are ready for more action.

Ben 10: Ultimate Alien: Full Episodes

Season 3

Season 2

Season 1