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Ben 10: Ultimate Alien All Episodes |verified| May 2026

To watch Ben 10: Ultimate Alien , the series features 52 episodes across three seasons. It is the third installment in the main Ben 10 franchise, following the events of Alien Force and preceding Omniverse. Series Overview

The show ran from April 23, 2010, to March 31, 2012, following a 16-year-old Ben Tennyson after his secret identity is revealed to the world. It introduces the Ultimatrix, a device that allows Ben to transform his aliens into evolved "Ultimate" forms. Episode List by Season

Season 1 (20 Episodes): Follows the Aggregor and Map of Infinity arcs, where Ben must stop an Osmosian villain from absorbing the powers of five aliens from the Andromeda Galaxy.

Season 2 (12 Episodes): Focuses on Ben's growing fame, the return of classic villains like Dr. Animo, and the preparation for the Daigon arc. ben 10: ultimate alien all episodes

Season 3 (20 Episodes): Concludes the Daigon and Vilgax arc, culminating in the final battle for the universe in the series finale, "The Ultimate Enemy." How to Watch

You can find all episodes through the following official platforms:

Max (formerly HBO Max): This is the primary streaming home for all Ben 10 series in the U.S. To watch Ben 10: Ultimate Alien , the

Hulu: Episodes are often available via a live TV subscription or specific regional licensing.

YouTube/Google Play: Individual episodes or full seasons are available for digital purchase.

Amazon Prime Video: Available for purchase on the Ben 10: Ultimate Alien Storefront. Season 2 (2011)

For fans looking for newer content, a rebooted Ben 10 comic series is scheduled to launch in 2026.

Here’s a complete review of Ben 10: Ultimate Alien (all episodes), covering its strengths, weaknesses, key arcs, and where it stands in the broader Ben 10 franchise.

Season 2 (2011)

  1. ...Nor Iron Bars a Cage – Ben tries to cure the mutated Kevin.
  2. The Enemy of My Enemy – Argit becomes the target of the mutated Kevin.
  3. Absolute Power: Part 1 – Ben resolves to destroy Kevin to stop him.
  4. Absolute Power: Part 2 – The climactic battle between Ben and Kevin.
  5. The Transmogrification of Eunice – Ben meets a Unitrix (a prototype Omnitrix).
  6. Eye of the Beholder – Ben helps an alien artist (Galante).
  7. Viktor: The Spoils – Dr. Viktor returns in a new robotic body.
  8. The Big Story – Jimmy Jones (kid reporter) discovers a Clone conspiracy.
  9. Girl Trouble – Sunny (Gwen's cousin) and Antonio arrive.
  10. Revenge of the Swarm – A sequel to Alien Force's "Voided" involving Dr. Animo.
  11. The Creature From Beyond – Introduction of the Lucubra entity.
  12. Basic Training – Ben and Gwen attend the Plumbers' Academy.
  13. It's Not Easy Being Gwen – A slice-of-life episode focusing on Gwen's stress.
  14. Ben 10,000 Returns – Future Ben returns to warn of a coming threat.

Season 3 (2011–2012)

  1. The Purge – The Forever Knights unite under Driscoll to purge all aliens.
  2. Simian Says – Eunice returns; Arachnichimp (Spidermonkey) shenanigans.
  3. Greetings from Techadon – The Weaponmasters of Techadon target Ben.
  4. The Flame Keepers' Circle – Ben joins a cult that worships an alien.
  5. Double or Nothing – An actor playing Ben in a movie is targeted.
  6. The Perfect Girlfriend – Julie is possessed by Elena Validus (Nanochips).
  7. Ultimate Sacrifice – Ben’s Ultimate forms gain sentience and rebel.
  8. The Widening Gyre – A massive garbage monster threatens the Earth.
  9. The Mother of All Vreedles – Ma Vreedle arrives to steal the Earth's oceans.
  10. A Knight to Remember – The Forever Knights' origin with Sir George.
  11. Solitary Alignment – Azmuth debates the morality of Ascalon.
  12. Inspector 13 – The Weaponmaster returns; Kevin is accidentally trapped in the Ultimatrix.
  13. The Ultimate Enemy: Part 1 – Vilgax returns, using the Esoterica to summon Dagon.
  14. The Ultimate Enemy: Part 2 – The final battle; Ben wields Ascalon and merges with the Omnitrix.

(Note: Episodes 45–52 in syndication are often listed differently or compiled as special features in some regions, but the core narrative concludes at Episode 44/52 depending on the production block. Below are the remaining episodes produced in the block.)

  1. Couples Retreat – Darkstar and Charmcaster's tumultuous relationship.
  2. Catch a Falling Star – Jennifer Nocturne helps Captain Nemesis escape prison.
  3. The Eggman Cometh – Dr. Animo evolves dinosaurs into sentient beings.
  4. Night of the Living Nightmare – Ben suffers a fever dream where Albedo infects him.
  5. The Beginning of the End – The Esoterica initiate the Dagon ritual.
  6. A Jolt from the Past – Ben encounters his old enemies J.T. and Cash.
  7. Pet Project – Ship is captured by the Forever Knights.
  8. Dreams – A series of vignettes where Ben dreams of battling enemies.

(Note: The final three episodes "A Jolt from the Past," "Pet Project," and "Prisoner Number 775 Is Missing" (sometimes numbered differently) often air out of order. The listed log follows the narrative continuity flow most commonly recognized for coherent viewing.)

Episodes 47–52: The Ultimate Finale

  1. The Ultimate Sacrifice – Ben discovers the Ultimatrix’s AI is conscious. The ultimate forms rebel. Ben destroys their sentience, a morally gray act.
  2. The Widening Gyre (redux / conclusion) – Ties up the underwater kingdom arc.
  3. The Final Battle (Parts 1 & 2) – Series finale. Ben, using Ascalon, faces Vilgax-Dagon. Ben erases the Dagon entity, then resets the universe’s damage. He gives up the Ultimatrix to be destroyed, leading directly into Ben 10: Omniverse.

Overall Strengths

  1. Mature storytelling – Deals with fame’s downside, government surveillance, prejudice (anti-alien hysteria), and the burden of power.
  2. Kevin’s arc – His descent into madness in “Absolute Power” is heartbreaking and well-acted (Greg Cipes).
  3. Ultimate aliens – When used creatively (Ultimate Echo Echo vs. Ultimate Kevin), they’re awesome.
  4. Supporting cast – Gwen (magic heavy), Kevin (redeemed bad boy), and new allies like Captain Nemesis (twisted fan) add depth.
  5. Animation & fights – Improved fluidity over Alien Force; darker color palette fits the tone.

Where to Watch Ben 10: Ultimate Alien All Episodes

As of 2026, all 52 episodes of Ben 10: Ultimate Alien are available on:

4. Technical & Production Evaluation

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