The gang encounter Argit, who has teamed up with the Forever Knights and Aggregor's fourth prisoner.īen accidentally gets fused with Aggregor's fifth prisoner who has no plans of getting out of his body!īen's childhood hero makes a comeback while he's on a date with a beautiful, young movie actress.Īggregor, having recaptured the five aliens, puts his ultimate plan into action.īen must stop the newly transformed and extremely dangerous Aggregor from attaining the first piece of the Map of Infinity.Ĭash and J.T. The real story behind Aggregor and his escaped prisoners is revealed.Īfter Kevin accidentally releases Aggregor's third prisoner from a suit that protects others from his radiation, the gang has to stop him from radiating the Earth! Will Harangue comes up with a mastermind plan to put an end to Ben, the 'menace'. Zombozo, Charmcaster, and Vulkanus form an alliance and plan to ambush Ben's parents. Elsewhere, an alien plans to detonate a nuclear bomb.īen uses Echo Echo to make two clones of himself to attempt to be in three places at once. Airing Order.īen's secret identity is exposed, casting him into the spotlight. This article is about the Ultimate Alien episodes in production order. Several episodes in this season aired out of order. Furthermore, Season 3 was split into Seasons 2 and 3 when aired. Although the first 20 episodes were produced and aired as one season, they were written as two seasons of 10 episodes each. There are a total of 52 episodes and 2 crossover specials. The following is a list of episodes for Ben 10: Ultimate Alien.

Ben 10 ultimate alien seasons