The Ultimate Enemy: Part 2

The Ultimate Enemy: Part 2 is the fifty-second episode of Ben 10: Ultimate Alien and the twentieth episode in the third season. It is the series finale of Ultimate Alien.

Plot
Vilgax betrays Diagon so that he can absorb all of his power to destroy his one true enemy: Ben Tennyson.

Major Events

 * Vilgax absorbs Diagon's powers.
 * Azmuth cuts off the Ultimatrix from Ben so that he could give him a new Third Omnitrix.
 * All of the Esoterica turn human again thanks to Ben with Ascalon.
 * Vilgax tempts Ben into using the Ascalon sword, Ultimatrix, and Diagon's power to rule the world. (He later snaps out of it thanks to Julie).
 * Ben defeats Vilgax by using the Ascalon.
 * Ben and Julie share their first kiss.
 * Sir George and Diagon are both killed in this episode.
 * Ultimate Way Big makes his first appearance.

Characters

 * Ben Tennyson
 * Gwen Tennyson
 * Kevin Levin
 * Sir George (killed by the Diagon)
 * Azmuth

Villains

 * Diagon (Absorbed by Vilgax and killed by Ben)
 * Vilgax
 * Flame Keepers' Circle
 * Esoterica

Aliens Used

 * Jury Rigg (Off screen)
 * Way Big
 * Ultimate Way Big (First appearance)
 * Wildmutt
 * Ultimate Wildmutt
 * Chromastone

Trivia

 * This episode was dedicated to Dwayne McDuffie.
 * After Ben defeated Vilgax, Vilgax turns back into his Alien Force outfit, which strange since he lost them in the The Final Battle: Part 2.
 * This episode includes flashbacks through out Alien Force and Ultimate Alien.
 * This is Ultimate Wildmutt's second appearance.
 * At the end of the episode, Ben asks Azmuth if he can get Master Control for the new Omnitrix to, then Azmuth just smiles and says that he might will get it as a gift for Ben's 18th birthday.
 * A sneak peek of the forth Ben 10 series appeared after this episode.