Ben 10: Ultimate Alien

The WORST episodes of Ben 10: Ultimate Alien

Every episode of Ben 10: Ultimate Alien ever, ranked from worst to best by thousands of votes from fans of the show. The worst episodes of Ben 10: Ultimate Alien!

Taking place a few weeks after where Ben 10: Alien Force leaves off, Ben 10: Ultimate Alien follows the now sixteen-year-old Ben. The Omnitrix has been destroyed and Ben must learn to master the secrets of the new Ultimatrix, a gauntlet-like version of the old Omnitrix that not only gives him access to all of his original powers and abilities, but also allows him to evolve his alien forms into even stronger and even more powerful versions (called "ultimate forms").

Last Updated: 8/5/2022Network: Cartoon Network
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The Mother of All Vreedles
star
7.31
189 votes

#1 - The Mother of All Vreedles

Season 2 - Episode 21 - Aired 11/18/2011

Ma Vreedle plans to create a clone army of her newest spawn, using all of Earth's saltwater as a key ingredient in the cloning process.

Watch Now:Amazon
Duped
star
7.43
412 votes

#2 - Duped

Season 1 - Episode 2 - Aired 4/30/2010

Ben uses Echo Echo to make two clones of himself to attempt to be in three places at once.

Directors: Butch Lukic
Watch Now:Amazon
Reflected Glory
star
7.58
229 votes

#3 - Reflected Glory

Season 1 - Episode 12 - Aired 10/15/2010

Cash and J.T. take credit for Ben's successes, so Psyphon comes back thinking J.T. and Cash were responsible for Vilgax's defeat!

Directors: Matt Youngberg
Watch Now:Amazon
The Big Story
star
7.66
225 votes

#4 - The Big Story

Season 2 - Episode 4 - Aired 3/4/2011

While looking for a story to put on his site, Jimmy sees a strange meteorite fall to Earth.

Watch Now:Amazon
Fame
star
7.72
437 votes

#5 - Fame

Season 1 - Episode 1 - Aired 4/23/2010

Ben's secret identity is exposed, casting him into the spotlight. Elsewhere, an alien plans to detonate a nuclear bomb.

Directors: Dan Riba
Watch Now:Amazon
Deep
star
7.76
270 votes

#6 - Deep

Season 1 - Episode 13 - Aired 10/22/2010

Ben and the gang travel to a water planet in order to stop Aggregor from obtaining the second piece of the Map of Infinity.

Directors: Dan Riba
Watch Now:Amazon
The Enemy of My Enemy
star
7.81
232 votes

#7 - The Enemy of My Enemy

Season 1 - Episode 18 - Aired 12/3/2010

Argit asks for protection from Ben and Gwen after Kevin decides to finish him off.

Directors: Matt Youngberg
Watch Now:Amazon
Hit 'Em Where They Live
star
7.83
400 votes

#8 - Hit 'Em Where They Live

Season 1 - Episode 3 - Aired 5/7/2010

Zombozo, Charmcaster, and Vulkanus form an alliance and plan to ambush Ben's parents.

Directors: Matt Youngberg
Watch Now:Amazon
Andreas' Fault
star
7.92
215 votes

#9 - Andreas' Fault

Season 1 - Episode 7 - Aired 6/4/2010

The gang encounter Argit, who has teamed up with the Forever Knights and Aggregor's fourth prisoner.

Directors: Dan Riba
Watch Now:Amazon
Too Hot to Handle
star
7.92
277 votes

#10 - Too Hot to Handle

Season 1 - Episode 6 - Aired 5/28/2010

After Kevin accidentally releases Aggregor's third prisoner from a suit that protects others from his radiation, the gang has to stop him from radiating the Earth!

Directors: Matt Youngberg
Watch Now:Amazon
Ultimate Aggregor
star
7.94
298 votes

#11 - Ultimate Aggregor

Season 1 - Episode 10 - Aired 10/10/2010

Aggregor, having recaptured the five aliens, puts his ultimate plan into action.

Directors: Matt Youngberg
Watch Now:Amazon
Perplexahedron
star
7.96
250 votes

#12 - Perplexahedron

Season 1 - Episode 15 - Aired 11/5/2010

With the fourth piece of the Map of Infinity almost in Aggregor's clutches, the gang chase him through the artificial planetoid known as the Perplexahedron.

Directors: Matt Youngberg
Watch Now:Amazon
The Transmogrification of Eunice
star
7.97
206 votes

#13 - The Transmogrification of Eunice

Season 2 - Episode 1 - Aired 2/4/2011

The gang meet a new girl called Eunice and everything is going well... until Sunder shows up for her.

Directors: Dan Riba
Watch Now:Amazon
Girl Trouble
star
7.98
174 votes

#14 - Girl Trouble

Season 2 - Episode 5 - Aired 3/11/2011

Gwen is infuriated by the prospect of her cousin paying the team a visit, and it only gets worse when it is uncovered that her cousin is not entirely human...

Watch Now:Amazon
Video Games
star
8.00
336 votes

#15 - Video Games

Season 1 - Episode 4 - Aired 5/14/2010

Will Harangue comes up with a mastermind plan to put an end to Ben, the 'menace'.

Directors: Dan Riba
Watch Now:Amazon
Double or Nothing
star
8.02
195 votes

#16 - Double or Nothing

Season 2 - Episode 17 - Aired 10/14/2011

Albedo resurfaces, and he's making money off of Ben's fame.

Watch Now:Amazon
Simian Says
star
8.04
200 votes

#17 - Simian Says

Season 2 - Episode 14 - Aired 9/23/2011

A Xenocyte Queen takes over the Arachnichimps' home planet.

Watch Now:Amazon
Where the Magic Happens
star
8.05
239 votes

#18 - Where the Magic Happens

Season 1 - Episode 14 - Aired 10/29/2010

Gwen is forced to team up with her nemesis, Charmcaster, when the team finds themselves to have to stop Aggregor!

Directors: Butch Lukic
Watch Now:Amazon
Viktor: The Spoils
star
8.06
166 votes

#19 - Viktor: The Spoils

Season 2 - Episode 3 - Aired 2/18/2011

The team are called in to investigate a dispute in the small country of Zarkovia. Once there, they discover an old enemy is about to be unleashed.

Watch Now:Amazon
Absolute Power (2)
star
8.11
203 votes

#20 - Absolute Power (2)

Season 1 - Episode 20 - Aired 12/10/2010

Gwen and Ben have to do whatever it takes to bring down the "mad dog" Kevin.

Directors: Dan Riba
Watch Now:Amazon
A Knight to Remember
star
8.14
155 votes

#21 - A Knight to Remember

Season 2 - Episode 22 - Aired 12/2/2011

Vilgax and the Flame Keepers' Circle duel George and the Forever Knights, who oppose their goals of reviving Dagon.

Watch Now:Amazon
Map of Infinity
star
8.14
249 votes

#22 - Map of Infinity

Season 1 - Episode 11 - Aired 10/10/2010

Ben must stop the newly transformed and extremely dangerous Aggregor from attaining the first piece of the Map of Infinity.

Directors: Matt Youngberg
Watch Now:Amazon
Fused
star
8.17
302 votes

#23 - Fused

Season 1 - Episode 8 - Aired 6/11/2010

Ben accidentally gets fused with Aggregor's fifth prisoner who has no plans of getting out of his body!

Directors: Dan Riba
Watch Now:Amazon
Hero Time
star
8.19
297 votes

#24 - Hero Time

Season 1 - Episode 9 - Aired 6/18/2010

Ben's childhood hero makes a comeback while he's on a date with a beautiful, young movie actress.

Directors: Matt Youngberg
Watch Now:Amazon
Absolute Power (1)
star
8.21
238 votes

#25 - Absolute Power (1)

Season 1 - Episode 19 - Aired 12/10/2010

When Ben and Gwen are faced with an unexpected enemy, Gwen turns to Darkstar for help.

Directors: Dan Riba
Watch Now:Amazon

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