Ben 10: Ultimate Alien (TV Series 2010–2012) - Episode list

A haunting episode about a secret alien prison; shows a darker side of the Plumbers . Absolute Power (Pt. 1 & 2)

While many fans debate which era of the franchise is supreme, offers some of the most emotionally complex and high-stakes episodes in the entire series. Building on the foundation of Alien Force , UA upped the ante with the Ultimatrix , a public identity reveal, and sprawling multi-season arcs like the Aggregor and Ultimate Kevin sagas .