Ben 10: Ultimate Alien All Episodes Exclusive [ SAFE ⟶ ]
| Ep # | Title | Critical Moment | | :--- | :--- | :--- | | 33 | | Elena’s obsession with Ben | | 34 | The Ultimate Sacrifice | Ultimatrix aliens gain sentience | | 35 | The Widening Gyre | Underwater adventure | | 36 | The Mother of All Vreedles | Comedy episode | | 37 | A Knight to Remember | Sir George returns | | 38 | Solitary Alignment | N/A | | 39 | Inspector 13 | Tech-based enemy | | 40 | The Enemy of My Frenemy | Charmcaster betrays | | 41 | Couples Retreat | Ben/Julie and Gwen/Kevin double date | | 42 | Catch a Falling Star | Jennifer Nocturne, the actress | | 43 | The Eggman Cometh | N/A | | 44 | Night of the Living Nightmare | Trap episode (Ben in a dream) | | 45 | The Beginning of the End (Part 1) | Dagon breaks free | | 46 | The Beginning of the End (Part 2) | Ben loses the Ultimatrix | | 47 | The Ultimate Enemy (Part 1) | Vilgax becomes a god | | 48 | The Ultimate Enemy (Part 2) | Ben turns into Ascalon + Final battle | | 49-52 | (Four additional standalone filler episodes) | Clyde 5 , Rules of Engagement , What Are Little Girls Made Of? , The Wolf Among Us |
| 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 |
| Ep # | Title | Notes | | :--- | :--- | :--- | | 21 | | Introduces Unitrix (Eunice) | | 22 | Eye of the Beholder | Julie/Ben relationship drama | | 23 | Viktor: The Spoils | Returns of Dr. Viktor | | 24 | The Big Story | A reporter follows Ben | | 25 | Girl Trouble | Returns of the Vreedle Brothers | | 26 | Revenge of the Swarm | Nanomech episode | | 27 | The Creature from Beyond | First appearance of Dagon’s Esoterica | | 28 | Basic Training | Plumbers’ Academy flashback | | 29 | It's Not Easy Being Gwen | Gwen’s Anodite side explored | | 30 | Ben 10,000 Returns | Future Ben appears; introduces Ultimate Albedo | | 31 | Moonstruck | N/A | | 32 | The Flame Keeper's Circle | Dagon’s cult grows | Season 3 (2011-2012) – The Vilgax/Dagon Finale Episode Count: 20 ben 10: ultimate alien all episodes
The final season wraps up every loose thread, culminating in a massive battle between Ben, Vilgax (who has fused with Dagon), and an unexpected savior.
The emotional climax is Kevin absorbing the Ultimatrix and becoming an insane, power-hungry mutant. Ben is forced to make a heartbreaking decision about whether to kill his best friend. Season 2 (2011) – The Dagon Arc Episode Count: 12 | Ep # | Title | Critical Moment
When Ben 10: Alien Force ended on a cliffhanger, fans were hungry for more high-stakes action, darker narratives, and new transformations. Enter Ben 10: Ultimate Alien , the third installment in the original Ben 10 franchise, which aired from April 2010 to March 2012. For anyone searching for a definitive resource on Ben 10: Ultimate Alien all episodes , you have come to the right place. Below, we break down every season, major arc, and essential episode you need to watch. What is Ben 10: Ultimate Alien? Before diving into the full episode list, here is a quick refresher. Ultimate Alien picks up immediately after Alien Force . Ben Tennyson is now 16 years old. The secret of his identity has been exposed to the world, turning him into an international celebrity—and a prime target for every alien bounty hunter and government agency on Earth.
Season 2 is shorter and pivots to cosmic horror. The villain is a ancient, Cthulhu-like entity named Dagon, with a resurrected Vilgax acting as his high priest. The emotional climax is Kevin absorbing the Ultimatrix
The first season focuses on Ben, Gwen, and Kevin trying to stop Aggregor from capturing the Andromeda Five aliens.