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Ben's secret identity isn't a secret anymore. He's a hero to some a menace to most and wielding a brand new Omnitrix. So look out planet Earth!

Cartoons • 2010 • U

Ben’s secret identity is revealed to the world and an alien refugee is about to detonate a nuclear bomb.

Ben 10 Ultimate Alien S1 Ep01

Under pressure from his newfound fame Ben comes up with a plan to be at more than one place at a time!

Ben 10 Ultimate Alien S1 Ep02

Now that Ben’s secret identity is out in the open his old enemies team up to attack his family.

Ben 10 Ultimate Alien S1 Ep03

Ben’s celebrity lands him a starring role in his own video game!

Ben 10 Ultimate Alien S1 Ep04

Five aliens from another galaxy attempt to escape from their mysterious captor.

Ben 10 Ultimate Alien S1 Ep05

A radioactive alien menace tricks Kevin into freeing him from his containment suit.

Ben 10 Ultimate Alien S1 Ep06

The team discovers that alien con-man Argit has somehow become the leader of the Forever Knights!

Ben 10 Ultimate Alien S1 Ep07

Ben is trapped in the form of his newest transformation a form Aggregor intends to destroy.

Ben 10 Ultimate Alien S1 Ep08

A starstruck Ben dates a beautiful young movie actress... while his childhood hero makes a comeback!

Ben 10 Ultimate Alien S1 Ep09

Aggregor’s ultimate plan is revealed and it’s already too late to stop him!

Ben 10 Ultimate Alien S1 Ep10

Ben and his team travel to a bizarre half-frozen half molten planet to prevent Aggregor from obtaining a priceless map.

Ben 10 Ultimate Alien S1 Ep11

JT and Cash get in over their heads when they take credit for Ben’s heroic acts.

Ben 10 Ultimate Alien S1 Ep12

Ben Kevin and Gwen journey to the center of an all-water planet in an attempt to finally of capture Aggregor.

Ben 10 Ultimate Alien S1 Ep13

Gwen takes the team to a dimension of magic where their only hope of survival rests with her old foe Charmcaster.

Ben 10 Ultimate Alien S1 Ep14

Ben Kevin and Gwen race Aggregor through a mysterious artificial planetoid designed to destroy anyone who enters.

Ben 10 Ultimate Alien S1 Ep15

Professor Paradox holds the key to stopping Aggregor from tapping into the limitless power of Alien X.

Ben 10 Ultimate Alien S1 Ep16

To settle an old score Kevin voluntarily returns to the Null Void prison he once escaped.

Ben 10 Ultimate Alien S1 Ep17

Argit infiltrates the Plumber’s Academy with a plan to help the Vreedle Brothers do the last thing anyone would expect.

Ben 10 Ultimate Alien S1 Ep18

Ben is infuriated when Gwen asks Darkstar for his help defeating the team’s deadliest and most unlikely foe of all.

Ben 10 Ultimate Alien S1 Ep19

It’s Ben and company’s last stand against a foe they can’t bring themselves to fight!

Ben 10 Ultimate Alien S1 Ep20

Ben 10 Ultimate Alien S1

The team discovers a strange alien girl with no memory—but Sunder has been hired to capture her!

Where the Magic Happens S2 Ep01

Ship’s former owner Baz-L has been captured and Ben Julie and co set out to save him.

Where the Magic Happens S2 Ep02

Where the Magic Happens S2 Ep03

Ben 10 super-fan Jimmy saves our heroes from an evil alien plant species.

Where the Magic Happens S2 Ep04

Gwen’s cousin Sunny pays a visit but she’s more than meets the eye!

Where the Magic Happens S2 Ep05

The return of Elena and the nanochips from the "Alien Swarm" movie!

Where the Magic Happens S2 Ep06

Ben and co are visited by Ben 10K who is tracking down the evil Eon! (NEW ALIEN - Clockwork)

Where the Magic Happens S2 Ep07

The Forever Knights accidentally unleash an evil force that threatens to enslave the human race!

Where the Magic Happens S2 Ep08

Ben and co are forced to go through basic training at the Plumber’s Academy.

Where the Magic Happens S2 Ep09

A typical day in the not-so-typical life of Gwen Tennyson.

Where the Magic Happens S2 Ep10

Max, Ben, Gwen and Kevin discover the hidden truth about Area 51. Introducing a brand NEW ALIENS ChamAlien and Ult. Wildmutt.

Where the Magic Happens S2 Ep11

Flashback story of how Grandpa Max met Verdona the Anodite.

Where the Magic Happens S2 Ep12

An evil Highbreed queen takes over the Arachnachimp’s home planet.

Where the Magic Happens S2 Ep13

Vulkanus puts a hit out on Ben using the deadly Techadon robots!

Where the Magic Happens S2 Ep14

Old George THE Forever Knight re-ignites a war against all aliens on Earth!

Where the Magic Happens S2 Ep15

Albedo aka Negative Ben resurfaces and he’s making money off of Ben’s fame, but for what?

Where the Magic Happens S2 Ep16

The nano-chips are back and have disguised themselves as Julie!

Where the Magic Happens S2 Ep17

The ultimate aliens inside Ben’s Ultimatrix demand their freedom!

Where the Magic Happens S2 Ep18

Ben and the gang investigate the Pacific Garbage Vortex.

Where the Magic Happens S2 Ep19

Ma Vreedle intends to spawn using ALL of Earth’s ocean water!

Where the Magic Happens S2 Ep20

Vilgax gets Old George’s sword and tries to gain Dagon’s power—big mistake! Introducing NEW ALIEN Fasttrack.

Where the Magic Happens S2 Ep21

Azmuth reveals how Old George first got the sword and defeated Dagon and a whole lot more.

Where the Magic Happens S2 Ep22

Julie joins a fanatical group who has discovered Vilgax and worships him!

Where the Magic Happens S2 Ep23

A mysterious weaponmaster from Techadon visits Earth and wants the Ultimatrix.

Where the Magic Happens S2 Ep24

Gwen and co revisit Legerdomain in hopes of rescuing Charmcaster. Introducing NEW ALIEN Eetle!

Where the Magic Happens S2 Ep25

Charmcaster and Darkstar team up to destroy Ben Gwen and Kevin.

Where the Magic Happens S2 Ep26

Carl escapes from prison and changes his appearance to start a new life with Darkstar but not before he gets revenge on Ben for wrecking his life.

Where the Magic Happens S2 Ep27

The cure for climate change is in danger as the weather balloon is a target for destruction by Dr. Animo (so his flying reptile-man can invade the planet!).

Where the Magic Happens S2 Ep28

Ben faces a series of his biggest nemeses but where has everyone gone and why aren't they talking?

Where the Magic Happens S2 Ep29

Ben and the gang team up with the Forever Knights to stop Daggen from resurrecting into this realm.

Where the Magic Happens S2 Ep30

Thanks to the return of an old foe Dagon is getting closer and closer to entering our dimension.