Ben 10 - Ultimate Alien - Vol 3 (2010)

Actors:

Ben hopes to vanquish Aggregor for good but there are complications not least of which includes Ben falling into a time barrier. He is rescued by Gwen but Ben's 10-year-old self comes out with him! Kevin also has some problems - his personality changes and he takes on a new form. This leads to the climactic end to Season 1 where the Ben must take on a very surprising enemy.