As of July 2026, Ben 10: Ultimate Alien Season 2 aired in 2011 with 32 episodes — streaming now on HBO Max. Full episode guide and where to watch below.

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Ben 10: Ultimate Alien Season 2

2011 32 Episodes Animation · Action & Adventure ⭐ 8/10

Ben 10: Ultimate Alien Season 2 is currently streaming on and , and it earns its premise rather than just borrowing genre trappings. A single, tightly-focused season means there is plenty to get through without ever feeling padded. Its 8/10 TMDB score, built from 887 ratings, reflects a title that consistently delivers. Watch it for Yuri Lowenthal — the performance elevates material that could easily tip into self-seriousness. Put it on tonight and see for yourself.

There is a reason Ben 10: Ultimate Alien Season 2 keeps coming up in conversation. What makes Ben 10: Ultimate Alien Season 2 work is that the ideas never crowd out the people having them. Season 2 of Ben 10: Ultimate Alien includes 32 episodes. It aired from February 2011 to March 2012. This season stars Yuri Lowenthal, Ashley Johnson and Greg Cipes. Yuri Lowenthal and Ashley Johnson lead a cast that brings real weight to the material. It was aired in 2011. Ben 10: Ultimate Alien Season 2 resists the temptation to explain everything, trusting the audience to sit with ambiguity. The consistency throughout is what elevates it — not every moment is the best, but none of them are a reason to stop watching.

Ben 10: Ultimate Alien Season 2 is satisfying on multiple levels — something to watch and something to think about after. It rewards viewers regardless of what else is in their watch history. The complete run is available and best experienced without too much prior knowledge of where it goes. Yuri Lowenthal's performance is the anchor the more ambitious moments need. The world-building pays off in ways you will not anticipate on a first watch.

📡 Where to Watch Ben 10: Ultimate Alien Season 2

🇦🇺 Australia

HBO Max Amazon Channel

🇺🇸 United States

Spectrum On Demand

🇨🇦 Canada

TELETOON+ Amazon Channel

🇳🇿 New Zealand

HBO Max Amazon Channel

🎬 Ben 10: Ultimate Alien Season 2 — Episode Guide

The Transmogrification of Eunice

A mysterious alien girl named Eunice has no memory and is being hunted by Sunder. While evading Sunder, Ben soon discovers that Eunice has nature-based abilities.

Eye of the Beholder

Ben, Julie and the rest of the heroic crew embark on a dangerous journey that could cost them all their lives in an effort to achieve the safe return of Ship and his former owner Baz-L.

Viktor: The Spoils

The King of Zarkovia asks the team for help with a civil war. The team agrees to help when they find out Dr. Viktor may be involved.

Jimmy Jones is looking for the biggest new story he and Ben can tackle, but thats when he stumbles upon a strange pink tentacled creature which crashed from the sky into a near by cave.

Gwen is excited by the prospect of her cousin Sunny paying the team a visit while dealing with the Robots of Dimension 12. But her excitement quickly turns into trepidation when it is uncovered that her cousin is not all that she appears and has some particularly sinister intentions.

Revenge of the Swarm

Victor Validus resurfaces and attacks Ben at night. Elena Validus and the nanochips return.

The Creature from Beyond

The Forever Knights unleash an evil force mistaken for an ancient weapon.

Ben, Gwen, and Kevin are summoned to a Plumbers' Academy to go under training that is supervised by Magister Hulka.

It's Not Easy Being Gwen

Gwen has always been a multi-tasker, trying to juggle school, hobbies, friends and her work as a hero, waking up early and going to sleep late. But Gwen's already packed day is about to get worse when Dr. Animo attacks with an army of giant frogs and Gwen is forced to make a hard choice.

Ben 10,000 Returns

Following a visit from Paradox after a fight with Eon, Ben 10,000 arrives 20 years from the future to seek the aid of his past counterpart in tracking down Eon.

Grandpa Max tells the team about his first UFO encounter, which led him to meet Verdona.

Prisoner #775 Is Missing

After a base is attacked, Max is infuriated when they learn it was a secret alien prison facility. While Max argues with the officer in charge, the team tries to locate an escaped prisoner.

Old George, the original Forever Knight, reclaims his position, and orders the Knights to remove all aliens on Earth.

Simian asks the team for help when a DNAlien takes over his home world.

Greetings from Techadon

Ben faces Tecadon killer robots that have been programmed to kill him. Each robot is more powerful than the last one. Ben's only chance to survive is for Gwen to find out who commissioned the robots.

The Flame Keeper's Circle

Julie gets Ben to visit a charity organization who wants to improve the world with alien technology. Ben soon discovers the charity's benefactor is an old enemy.

Double or Nothing

Ben finds out there's a new show called 'Ben 10: Live." He finds an old enemy running the show and cashing in on his fame.

The Perfect Girlfriend

Julie suddenly leaves a tennis tournament and spends all her time with Ben.

The Ultimate Sacrifice

Ben's Ultimate transformations have developed their own personalities. Now they want their freedom from Ben.

The Widening Gyre

Colonel Rozum asks the team to investigate an island of garbage where people have been disappearing.

🎭 Cast of Ben 10: Ultimate Alien Season 2

Yuri Lowenthal

Ben Tennyson (voice)

Ashley Johnson

Gwen Tennyson (voice)

Greg Cipes

Kevin Levin (voice)

Dee Bradley Baker

Dee Bradley Baker

Humungosaur (voice)

📋 All Seasons of Ben 10: Ultimate Alien

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