– DNAliens overrun the home planet of Prince Simian (the Arachnichimp). Simian tricks Ben into helping him cure his people, but a mutated evolutionary virus complicates the mission.
: The Forever Knights begin a crusade to rid the Earth of all alien life.
Cash and J.T. start a web show claiming they are the brains behind Ben’s superhero operations, attracting the wrath of Psyphon. Episode 13: "Deep"
Ben gets a vision of the future showing Aggregor claiming the final piece of the Map. The team heads to a perilous nebula to alter the timeline. Episode 16: "The Forge of Creation" ben 10: ultimate alien all episodes
– In the series finale, Ben wields the legendary sword Ascalon alongside the Ultimatrix. He defeats Vilgax, resists the temptation of absolute power, and is rewarded with a brand-new Omnitrix by Azmuth. Where the Franchise Went Next
– Gwen's Anodite cousin Sunny comes to visit. Sunny looks sweet but harbors a destructive, rebellious streak that threatens the town.
– Despite Ben, Gwen, and Kevin's best efforts, Aggregor successfully absorbs all five Andromeda aliens, transforming into an unstoppable hybrid. The Map of Infinity & Ultimate Kevin Arc (Episodes 11–20) – DNAliens overrun the home planet of Prince
Max Tennyson shares the story of his youth, detailing how he first met Verdona (an Anodite) and how it set him on the path to joining the Plumbers. Episode 32: "Prisoner Number 775 is Missing"
– The DNAliens return on the Arachnichimp home world after Prince Simian accidentally infects his own planet. Season 3: The Dagon and Diagon Arc (Episodes 33–52)
If you don’t have time to watch back-to-back, prioritize these five: Cash and J
| Ep # | Title | Key Ultimate Alien Debut | | :--- | :--- | :--- | | 1 | | Ultimate Swampfire | | 2 | Duped | N/A (Echo Echo clone chaos) | | 3 | Hit 'Em Where They Live | Ultimate Spidermonkey | | 4 | Video Games | Ultimate Big Chill | | 5 | Escape from Aggregor | Ultimate Cannonbolt | | 6 | Too Hot to Handle | N/A | | 7 | Andreas' Fault | N/A | | 8 | Fused | N/A | | 9 | Hero Time | N/A (Ben meets a fake superhero) | | 10 | Ultimate Aggregor | Ultimate Aggregor (Villain) | | 11 | Map of Infinity | Ultimate Echo Echo | | 12 | Reflected Glory | N/A | | 13 | Deep | N/A | | 14 | Where the Magic Happens | N/A (Charmcaster episode) | | 15 | Perplexahedron | N/A | | 16 | The Forge of Creation | Ultimate Humungousaur (major role) | | 17 | ...Nor Iron Bars a Cage | N/A (Vilgax returns) | | 18 | The Enemy of My Enemy | N/A | | 19 | Absolute Power (Part 1) | Ultimate Kevin (debut) | | 20 | Absolute Power (Part 2) | Ultimate Way Big |
Gwen’s human-Anodite cousin, Sunny, comes to visit. Though she appears sweet, Sunny possesses immense cosmic power and a rebellious attitude that threatens local safety. Episode 26: "Revenge of the Swarm"
– P'andor breaks out of his containment suit with the help of a deceived Kevin. Ben must stop P'andor from consuming nuclear energy.