| 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 |
: Ben's secret identity is leaked online by a young fan named Jimmy Jones. Escape From Aggregor ben 10: ultimate alien all episodes
The game-changer where Ben’s identity is leaked to the world. | Ep # | Title | Key Ultimate
Future Ben (from the original series) comes back and immediately points out how flawed the Ultimatrix is. He fights Ultimate Albedo. The episode connects the entire original timeline and hints at Omniverse . He fights Ultimate Albedo
The show is divided into three production seasons, though airing orders vary by platform. Episode Count Primary Story Arc 20 Episodes The hunt for Aggregor and the "Ultimate Kevin" arc. 12 Episodes