Vilgax re-emerges in his most powerful form ever! Can Ben stop him?
Thanks to the return of an old foe, Dagon is getting closer and closer to entering our dimension.
A mysterious weaponmaster from Techadon visits Earth, and wants the Ultimatrix.
Flashback story of how Grandpa Max met Verdona the Anodite.
After defeating Vilgax, Ben battles Dagon in his True Form as Ultimate Way Big.
The Forever Knights battle Diagon's Esoterica, and Ben's plan to help the knights fails.
The final battle between the Forever Knights and Dagon's Esoterica is in full swing, with Ben caught in the middle!
Albedo attempts to get the Ultimatrix by invading Ben's mind.
Dr. Animo returns, and a new alien arrives: Juryrigg.
Movie starlet Jennifer Nocturne is recaptured by the evil Captain Nemesis!
Charmcaster and Darkstar team up to destroy Ben, Gwen and Kevin.
Gwen and company revisit Legerdomain in hopes of rescuing Charmcaster.
A Techadon weapon master comes to Earth and wants the Ultimatrix.
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.
The Flame Keepers realize their mistake too late. Vilgax wants the power of Daigon. The Forever Knights are out to destroy Daigon.
Ma Vreedle goes to Earth to expand her family by creating clones and using all the water on Earth.
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Sir Daganet challenges Argit for control of the Forever Knights. Watch more Ben 10 Ultimate Alien on Cartoon Network!
With Cash and JT in tow, Ben busts in to a Forever Knights stronghold! Watch more Ben 10 Ultimate Alien on Cartoon Network!
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