Ben 10: Ultimate Alien Season 2 Episode 12 123movies
The secrets of Area 51 are revealed to Ben Tennyson by Colonel Rosum after Old George infiltrates Area 51. (ChamAilen and Ultimate Wildmutt first appears in this episode).
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Serie: Ben 10: Ultimate Alien
Director: Dan Riba
Guest Star: Chris Pratt, John DiMaggio, Paul Eiding