List of Ben 10: Ultimate Alien episodes

This is a list of episodes in the American animated television series Ben 10: Ultimate Alien.

Ben's secret identity is revealed to the entire world, and he is now a superhero loved everywhere by kids and teenagers, but distrusted by many adults. Kevin and Gwen find out who revealed Ben's secret and where he lives, and the three go to "pay him a visit". The informant turns out to be a young boy named Jimmy Jones, who has followed Ben's exploits ever since he was ten-years old. With Jimmy's help, Ben and company discover a series of alien attacks in Florida. The unknown alien steals a nuclear device from a prototype interstellar rocket. They follow the alien to his ship, which he intends to launch using the nuke, which would destroy central Florida. Ben fights him as Spider-monkey, but proves to be too strong for him, so Ben turns into Ultimate Spidermonkey, with the Ultimatrix, defeating the alien with ease. Once defeated, the alien, Bivalvan, reveals he is from the Andromeda Galaxy who was kidnapped by an alien named Aggregor. He is left restrained, with assurance that the Plumbers will be along to bring him back home. Ben reluctantly returns to school with some encouragement from Julie. The students greet him with applause, including his old bullies Cash and JT. Meanwhile, Bivalvan is found and recaptured by Aggregor.

After trashing a Plasma Beam Tank belonging to the Forever Knights, Ben decides he needs to be in three places at once: 1) go to Julie's tennis game, 2) He has to fight the Forever Knights with Kevin, and 3) see the Sumo Slammers 3D movie. Using Echo Echo, he divides himself into three copies and transforms back into human form, creating three of himself. However, each is one part of his personality: one is logical, one is sensitive, and one is immature and insensitive. The sensitive Ben goes with Kevin to the museum, the insensitive Ben stays to watch Julie's match, and the logical Ben goes to see Sumo Slammers. Insensitive Ben proceeds to embarrass Julie while sensitive Ben cannot properly fight. When the Forever Knights steal a Aztec Battle Armor, Ben calls in his other selves for assistance, only to quickly realize that none of them are good fighters alone. He recombines into one and uses Lodestar to separate the armor, destroying it. Ben tries to apologize to Julie, which she almost accepts, until he admits he already went to see the Sumo Slammers movie when she suggests they go see it. Furious with Ben, Julie storms off with Gwen and Kevin right behind her leaving him alone to repent for what he has done in order to gain back their trust.

Ben's enemies are targeting his parents now that he's famous. Max, unable to deal with them alone following a fight with Sevenseven, has to enlist Ben's aid. Vulkanus, Charmcaster, and Zombozo try to attack Ben's dad, Carl, but Ben, Gwen, and Kevin intercept them. Realizing that, as a team, Ben and his friends are too strong to beat, Zombozo decides to "divide and conquer". He kidnaps Ben's mother, Sandra, knocking out Gwen who tried to protect her, and hides her in a carnival to lure the team out and separate them, but Ben and Kevin manage to beat Vulkanus and Charmcaster respectively, with Ben using Ultimate Big Chill. Gwen is left to fight Zombozo, and briefly uses her Anodite form to intimidate him into leaving the Tennyson family alone and to spread the word to every other villain.

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