Ben 10: Ultimate Alien: 2x13
The Purge
Old George, the original Forever Knight, reclaims his position, and orders the Knights to remove all aliens on Earth.
2 - 1The Transmogrification of Eunice Feb. 04, 2011
2 - 2Eye of the Beholder Feb. 11, 2011
2 - 3Viktor: The Spoils Feb. 18, 2011
2 - 4The Big Story Mar. 04, 2011
2 - 5Girl Trouble Mar. 11, 2011
2 - 6Revenge of the Swarm Mar. 18, 2011
2 - 7The Creature from Beyond Mar. 25, 2011
2 - 8Basic Training Apr. 01, 2011
2 - 9It's Not Easy Being Gwen Apr. 08, 2011
2 - 10Ben 10,000 Returns Apr. 15, 2011
2 - 11Moon Struck Apr. 22, 2011
2 - 12Prisoner #775 Is Missing Apr. 29, 2011
2 - 13The Purge Sep. 16, 2011
2 - 14Simian Says Sep. 23, 2011
2 - 15Greetings from Techadon Sep. 30, 2011
2 - 16The Flame Keeper's Circle Oct. 07, 2011
2 - 17Double or Nothing Oct. 14, 2011
2 - 18The Perfect Girlfriend Oct. 21, 2011
2 - 19The Ultimate Sacrifice Oct. 28, 2011
2 - 20The Widening Gyre Nov. 04, 2011
2 - 21The Mother of All Vreedles Nov. 18, 2011
2 - 22A Knight to Remember Dec. 02, 2011
2 - 23Solitary Alignment Dec. 09, 2011
2 - 24Inspector #13 Feb. 04, 2012
2 - 25The Enemy of My Frenemy Feb. 11, 2012
2 - 26Couples Retreat Feb. 18, 2012
2 - 27Catch a Falling Star Feb. 25, 2012
2 - 28The Eggman Cometh Mar. 03, 2012
2 - 29Night of the Living Nightmare Mar. 10, 2012
2 - 30The Beginning of the End Mar. 17, 2012
2 - 31The Ultimate Enemy (1) Mar. 24, 2012
2 - 32The Ultimate Enemy (2) Mar. 31, 2012