Upon its release, Ben 10: Ultimate Alien garnered generally positive reviews, with many praising its ambitious, serialized storytelling. On IMDb, the series holds a respectable rating. Critics and fans generally agree that it is not quite as strong as Ben 10: Alien Force , but it is still a worthwhile and often thrilling entry in the franchise.
| Episode | Title | Original Air Date | Plot Summary | | :--- | :--- | :--- | :--- | | | " The Purge " | September 16, 2011 | The Forever Knights initiate "The Purge," a worldwide attack on alien life that forces Ben to choose between saving random aliens and protecting his family. | | S3E2 | " Simian Says " | September 23, 2011 | A spider-like alien thief, Simian, tricks Argit into helping him steal a powerful alien crown, forcing Ben to chase them across the galaxy. | | S3E3 | " Greetings From Techadon " | September 30, 2011 | A Techadon Weapon Master is dispatched to Earth to eliminate Ben, but his real target is the Ultimatrix itself, which holds secrets about its own creation. | | S3E4 | " The Flame Keepers' Circle " | October 07, 2011 | A mysterious cult of Flame Keepers is preparing to summon a godlike entity named Diagon, and they believe Ben is their prophesied messiah. | | S3E5 | " Double or Nothing " | October 14, 2011 | Albedo (the evil Ben clone) returns, now obsessed with getting his own Ultimatrix back, and he uses a talk show to frame Ben for his crimes. | | S3E6 | " The Perfect Girlfriend " | October 21, 2011 | Ben's relationship with Julie is put to the test when her sentient alien pet, Ship, believes its primary function is to help Ben fight, not be a pet. | | S3E7 | " The Ultimate Sacrifice " | October 28, 2011 | The sentient alien forms inside the Ultimatrix demand their freedom, but their newfound free will causes them to turn on each other. | | S3E8 | " The Widening Gyre " | November 04, 2011 | An alien creature from the ocean deep begins destroying oil rigs and ships. The team discovers it is a protector of the sea, attacking polluters. | | S3E9 | " The Mother of All Vreedles " | November 11, 2011 | The Vreedle Brothers' terrifying mother, Ma Vreedle, arrives on Earth looking for her boys, and her idea of discipline involves blowing up the planet. | | S3E10 | " A Knight to Remember " | November 18, 2011 | The leader of the Forever Knights, Sir George, steals Excalibur to battle Diagon, but Ben must stop him when he decides humans are no longer worth saving. | | S3E11 | " Solitary Alignment " | November 25, 2011 | Ben must survive a deadly game of cat-and-mouse with a high-tech alien hunter who has locked down an entire ghost town as his personal hunting preserve. | | S3E12 | " Inspector 13 " | December 02, 2011 | A weapons inspector from the Techadon empire arrives to evaluate the Ultimatrix, intending to destroy it if it's too dangerous. | | S3E13 | " The Enemy of My Frenemy " | December 09, 2011 | Charmcaster, now desperate for power, makes a deal with the godlike Diagon, becoming his high priestess and orchestrating his return to Earth. | | S3E14 | " Couples Retreat " | February 03, 2012 | Azmuth sends Ben, Gwen, Kevin, and their significant others on a couple's retreat to a relaxing alien planet, but a bounty hunter has other plans. | | S3E15 | " Catch a Falling Star " | February 10, 2012 | An obsessive movie-star villain, Captain Nemesis, escapes from prison and kidnaps Ben's celebrity crush, forcing Ben to become a leading man. | | S3E16 | " The Egg Which Came Back " | February 17, 2012 | A strange alien egg is laid in the middle of Bellwood. The gang protects it from various alien factions, only to discover the creature inside is terrified. | | S3E17 | " Night of the Living Nightmare " | February 24, 2012 | Ben is trapped in a nightmare dimension where his fears come to life, including a zombified version of his own aliens and his loved ones turning on him. | | S3E18 | " The Beginning of the End " | March 02, 2012 | Diagon is fully summoned. Sir George is defeated, and a terrified Ben must rally his team to face the embodiment of chaos itself. | | S3E19 | " The Ultimate Enemy: Part 1 " | March 09, 2012 | The final battle begins. Vilgax absorbs Diagon's powers, becoming an even greater threat. Ben activates the "Evolutionary Function" on every alien at once. | | S3E20 | " The Ultimate Enemy: Part 2 " | March 31, 2012 | The series finale: Ben becomes "Ultimate Ben," keeping his human form but channeling the power of all his aliens, for a final, universe-ending showdown with Vilgax. |
– Julie returns from a tournament acting unnaturally obedient. Ben eventually realizes she is actually Elena Validus in disguise.
The final conflict involves the Forever Knights, a cult called the Esoterica, and the extra-dimensional entity Dagon, culminating in the series finale, "The Ultimate Enemy". Series Highlights " (S01E01):
Ben 10: Ultimate Alien stands as a pivotal chapter in the franchise. It successfully transitioned Ben into a more complex world where being a hero was no longer just about fighting villains, but also about managing fame, friendships, and impossible moral choices. With its high-stakes arcs, the introduction of the powerful "ultimate" feature, and a satisfying (if bittersweet) conclusion to the Vilgax conflict, the series remains a fan-favorite for those who grew up watching Cartoon Network's golden age of action cartoons. ben 10: ultimate alien all episodes
Metallic, spiked armor plating; increased speed, bouncing momentum, and defense.
Swaps duplication for lethal sonic discs that levitate around targets.
After the events of Alien Force , Ben’s secret identity is exposed to the world by the villainous aggregator, Captain Nemesis. Now a global celebrity—and target—Ben must balance high school, fame, and galactic threats. The Ultimatrix, created by the rogue genius Albedo, allows Ben to evolve his aliens into their “Ultimate” forms (e.g., Ultimate Humungousaur, Ultimate Echo Echo).
– DNAliens return on a distant planet, and Prince Simian accidentally causes a Xenocyte outbreak. Upon its release, Ben 10: Ultimate Alien garnered
If you want to dive deeper into specific storylines, let me know if you want a , an analysis of Kevin's mutation arcs , or a look at how the Ultimatrix compares to the original Omnitrix . Share public link
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| Ep # | Title | Summary | |------|-------|---------| | 33 | Greetings from Techadon | Techadon robot army attacks. | | 34 | The Flame Keeper’s Circle (Part 2) | Dagon’s followers grow. | | 35 | The Ultimate Enemy (Part 1) | Dagon possesses Ben’s friends. | | 36 | The Ultimate Enemy (Part 2) | Ben rejects Dagon’s power. | | 37 | A Knight to Remember | Sir George (immortal knight) hunts Dagon. | | 38 | Solitary Alignment | Paradox explains Dagon’s origin. | | 39 | Inspector 13 | Villain steals Ultimatrix data. | | 40 | The Enemy of My Frenemy | Charmcaster double-crosses. | | 41 | Couples Retreat | Ben & Julie break up. | | 42 | Catch a Falling Star | Jennifer Nocturne (actress) is a villain. | | 43 | The Eggman Cometh | Alien egg heist. | | 44 | Night of the Living Nightmare | Ben trapped in dream world. | | 45 | The Beginning of the End | Dagon emerges. | | 46 | The Ultimate Enemy (Part 3) | Dagon vs. Vilgax. | | 47 | The Most Dangerous Game Show | Game show in space. | | 48 | The Widening Gyre | Underwater alien war. | | 49 | The Final Battle (Part 1) | Vilgax absorbs Dagon. | | 50 | The Final Battle (Part 2) | Ben unlocks full power of Ultimatrix; defeats Vilgax. | | 51 | Ben 10/Generator Rex: Heroes United (crossover) | Ben sent to Rex’s world. | | 52 | The Moon Strikers | Season wrap-up; road trip to new adventures. |
There are several ways to watch all episodes of Ben 10: Ultimate Alien: | Episode | Title | Original Air Date
Dagon arc begins; Vilgax as main threat.
– The Forever Knights and the Esoterica engage in a massive war for the fate of Earth.
– The five Andromeda aliens (Bivalvan, Galapagus, P'andor, Andreas, and Ra'ad) escape Aggregor's ship and crash-land on Earth.