Ben 10: Ultimate Alien (2010–2012)
16 Sep. 2011The Purge
Old George, the original Forever Knight, reclaims his position, and orders the Knights to remove all aliens on Earth.
23 Sep. 2011Simian Says
Simian asks the team for help when a DNAlien takes over his home world.
30 Sep. 2011Greetings from Techadon
Ben faces Tecadon killer robots that have been programmed to kill him. Each robot is more powerful than the last one. Ben's only chance to survive is for Gwen to find out who commissioned the robots.
7 Oct. 2011The Flame Keeper's Circle
Julie gets Ben to visit a charity organization who wants to improve the world with alien technology. Ben soon discovers the charity's benefactor is an old enemy.
14 Oct. 2011Double or Nothing
Ben finds out there's a new show called 'Ben 10: Live." He finds an old enemy running the show and cashing in on his fame.
21 Oct. 2011The Perfect Girlfriend
Julie suddenly leaves a tennis tournament and spends all her time with Ben.
28 Oct. 2011Ultimate Sacrifice
Ben's Ultimate transformations have developed their own personalities. Now they want their freedom from Ben.
4 Nov. 2011The Widening Gyre
Colonel Rozum asks the team to investigate an island of garbage where people have been disappearing.
18 Nov. 2011The Mother of All Vreedles
Ma Vreedle goes to Earth to expand her family by creating clones and using all the water on Earth.
2 Dec. 2011A Knight to Remember
The Flame Keepers realize their mistake too late. Vilgax wants the power of Daigon. The Forever Knights are out to destroy Daigon. Ben and the team try to sort things out.
9 Dec. 2011Solitary Alignment
Azmuth reveals the origin of the sword and how he first encountered Old George. Ben comes to a decision on how to handle the Daigon.
2 Dec. 2011Inspector #13
A Techadon weapon master comes to Earth and wants the Ultimatrix.
11 Feb. 2012The Enemy of My Frenemy
Gwen and co revisit Legerdomain in hopes of rescuing Charmcaster. Introducing NEW ALIEN, Eetle!
18 Feb. 2012Couples Retreat
Charmcaster & Darkstar team up to destroy Ben, Gwen and Kevin.
25 Feb. 2012Catch a Falling Star
Movie starlet Jennifer Nocturne is recaptured by the evil Captain Nemesis!
10 Mar. 2012Night of the Living Nightmares
Albedo attempts to get the ultimatrix by invading Ben's mind.
17 Mar. 2012The Beginning of the End
The final battle between the Forever Knights and Dagon's Esoterica is in full swing, with Ben caught in the middle!
24 Mar. 2012The Ultimate Enemy: Part 1
The Forever Knights battle Diagon's Esoterica, and Ben's plan to help the knights fails.
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