Ben 10: Unleashed

Ben 10: Unleashed, or Back in Action: Alien Universe Unleashed, is the title for the second season finale of Ben 10: Alien Universe, as well as for the title of the third season of Alien Universe. The finale premiered as the last known episode of Ben 10: Alien Universe, as well as the first time Vilgax and Azmuth appeared in-person to Ben onscreen.