Ben 10: Ultimate Alien backdrop
Animation•Action & Adventure•Sci-Fi & Fantasy

The Best Episodes of Ben 10: Ultimate Alien

Every episode of Ben 10: Ultimate Alien ranked from best to worst. Let's dive into the Best Episodes of Ben 10: Ultimate Alien!

Binge this in 19h 56m•Peaking at 9.5/10

With his secret identity now revealed to the world, Ben Tennyson continues to fight evil as a superhero with the help of the newly acquired Ultimatrix.

Airs on
Cartoon Network
BestEpisodes
WorstEpisodes
BestSeasons
AllEpisodes

Seasons2

All12

Episode Rankings

  1. #1 Fan Favorite
    Click to reveal
    Ben 10: Ultimate Alien Season 1 Episode 16 - The Forge of Creation
    9.5/10(1178 votes)

    #1 - The Forge of Creation

    S1:E16

    As the team makes its final attempt to stop Aggregor, they find an unexpected ally, and one person will make a fateful decision with lasting repercussions.

    Director:Dan Riba
    Writers:Joe Casey, Joe Kelly

    Be the first to start the conversation for this episode

  2. Ben 10: Ultimate Alien Season 2 Episode 25 - The Enemy of My Frenemy
    9.4/10(5 votes)

    #2 - The Enemy of My Frenemy

    S2:E25

    Gwen and co revisit Legerdomain in hopes of rescuing Charmcaster.

    Director:Matt Youngberg
    Writers:Brian Swenlin, David McDermott

    Be the first to start the conversation for this episode

  3. Ben 10: Ultimate Alien Season 2 Episode 26 - Couples Retreat
    9.4/10(5 votes)

    #3 - Couples Retreat

    S2:E26

    After Darkstar opens the Door to Anywhere, Charmcaster comes through, and the two team up to give Ben, Gwen, and Kevin the fight of a lifetime.

    Director:Dan Riba
    Writer:Geoffrey Thorne

    Be the first to start the conversation for this episode

  4. Ben 10: Ultimate Alien Season 1 Episode 8 - Fused
    9.0/10(578 votes)

    #4 - Fused

    S1:E8

    Ra'ad, the last of Aggregor's escaped prisoners, attacks Ben and informs the team of the true fate of his comrades. He finds a safe hiding place but one that endangers Ben in the process.

    Director:Dan Riba
    Writers:Len Uhley, Joe Casey, Duncan Rouleau

    Be the first to start the conversation for this episode

  5. Ben 10: Ultimate Alien Season 1 Episode 11 - Map of Infinity
    9.0/10(637 votes)

    #5 - Map of Infinity

    S1:E11

    Aggregor has absorbed all the powers of his captured aliens. Now he's after the Map of Infinity.

    Director:Matt Youngberg
    Writers:Joe Casey, Joe Kelly

    Be the first to start the conversation for this episode

  6. Ben 10: Ultimate Alien Season 1 Episode 14 - Where the Magic Happens
    9.0/10(619 votes)

    #6 - Where the Magic Happens

    S1:E14

    Aggregor escapes to a magical dimension. Gwen asks for Charmcaster's help to pursue him. The team learns about Charmcaster's past and why she's willing to help them now.

    Director:Butch Lukic
    Writers:Joe Casey, Joe Kelly

    Be the first to start the conversation for this episode

    7. Trending NowTRENDING NOW

    The 20 WORST Episodes of Ben 10: Ultimate Alien

    READ
  7. Ben 10: Ultimate Alien Season 2 Episode 10 - Ben 10,000 Returns
    9.0/10(744 votes)

    #7 - Ben 10,000 Returns

    S2:E10

    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.

    Director:Matt Youngberg
    Writers:Joe Casey, Joe Kelly

    Be the first to start the conversation for this episode

  8. Ben 10: Ultimate Alien Season 2 Episode 27 - Catch a Falling Star
    9.0/10(6 votes)

    #8 - Catch a Falling Star

    S2:E27

    Movie starlet Jennifer Nocturne is recaptured by the evil Captain Nemesis!

    Director:Butch Lukic
    Writer:Len Uhley

    Be the first to start the conversation for this episode

  9. Ben 10: Ultimate Alien Season 1 Episode 7 - Andreas' Fault
    8.9/10(577 votes)

    #9 - Andreas' Fault

    S1:E7

    Then team encounters another of Aggregor's escaped prisoners, Andreas, whom Argit is using as part of a scheme against the Forever Knights.

    Director:Dan Riba
    Writers:Ernie Altbacker, Joe Casey, Joe Kelly

    Be the first to start the conversation for this episode

  10. Ben 10: Ultimate Alien Season 1 Episode 5 - Escape from Aggregor
    8.8/10(618 votes)

    #10 - Escape from Aggregor

    S1:E5

    The team encounters another alien who escaped from Aggregor and, through him, learns more about Aggregor's goals.

    Director:Butch Lukic
    Writers:Charlotte Fullerton, Joe Casey, Joe Kelly

    Be the first to start the conversation for this episode

  11. Ben 10: Ultimate Alien Season 2 Episode 23 - Solitary Alignment
    8.8/10(6 votes)

    #11 - Solitary Alignment

    S2:E23

    Azmuth reveals the origin of the sword and how he first encountered Old George. Ben comes to a decision on how to handle the Daigon.

    Director:Matt Youngberg
    Writer:Peter David

    Be the first to start the conversation for this episode

  12. Ben 10: Ultimate Alien Season 1 Episode 9 - Hero Time
    8.7/10(575 votes)

    #12 - Hero Time

    S1:E9

    Ben meets his hero, Captain Nemesis, who's become jealous of all the attention Ben attracts.

    Director:Matt Youngberg
    Writers:Steven Barnes, Joe Casey, Joe Kelly

    Be the first to start the conversation for this episode

  13. Ben 10: Ultimate Alien Season 1 Episode 10 - Ultimate Aggregor
    8.7/10(604 votes)

    #13 - Ultimate Aggregor

    S1:E10

    Aggregor has all five aliens. The Plumbers manage to disable Aggregor's ship, forcing Aggregor to find a new way to absorb their powers. The team makes a last ditch effort to save the alien prisoners.

    Director:Matt Youngberg
    Writers:Joe Casey, Matt Youngberg, Joe Kelly

    Be the first to start the conversation for this episode

  14. Ben 10: Ultimate Alien Season 1 Episode 15 - Perplexhahedron
    8.7/10(868 votes)

    #14 - Perplexhahedron

    S1:E15

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

    Director:Matt Youngberg
    Writers:Joe Casey, Joe Kelly

    Be the first to start the conversation for this episode

  15. Ben 10: Ultimate Alien Season 1 Episode 17 - Nor Iron Bars a Cage
    8.7/10(584 votes)

    #15 - Nor Iron Bars a Cage

    S1:E17

    Kevin's out for payback on anyone who has ever crossed him. His next stop is a prison in the Null Void. Ben and Gwen try to stop him, where Ben comes to a grim decision.

    Director:Butch Lukic
    Writers:Joe Casey, Joe Kelly

    Be the first to start the conversation for this episode

  16. Ben 10: Ultimate Alien Season 1 Episode 18 - The Enemy of My Enemy
    8.7/10(581 votes)

    #16 - The Enemy of My Enemy

    S1:E18

    Argit asks Ben and Gwen for protection from Kevin, so they take him to the nearest Plumbers Academy, but that won't stop Kevin.

    Director:Matt Youngberg
    Writers:Len Uhley, Joe Casey, Duncan Rouleau

    Be the first to start the conversation for this episode

  17. Ben 10: Ultimate Alien Season 1 Episode 20 - Absolute Power (2)
    8.7/10(729 votes)

    #17 - Absolute Power (2)

    S1:E20

    Final confrontation with Kevin. While Gwen makes a last ditch effort to save Kevin, Ben fights an all out battle with Kevin.

    Director:Dan Riba
    Writers:Joe Casey, Joe Kelly

    Be the first to start the conversation for this episode

  18. Ben 10: Ultimate Alien Season 2 Episode 1 - The Transmogrification of Eunice
    8.7/10(564 votes)

    #18 - The Transmogrification of Eunice

    S2:E1

    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.

    Director:Matt Youngberg
    Writers:Joe Casey, Joe Kelly

    Be the first to start the conversation for this episode

  19. Ben 10: Ultimate Alien Season 2 Episode 6 - Revenge of the Swarm
    8.7/10(531 votes)

    #19 - Revenge of the Swarm

    S2:E6

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

    Director:Butch Lukic
    Writers:Joe Casey, Joe Kelly, Stan Berkowitz

    Be the first to start the conversation for this episode

  20. Ben 10: Ultimate Alien Season 2 Episode 9 - It's Not Easy Being Gwen
    8.7/10(1096 votes)

    #20 - It's Not Easy Being Gwen

    S2:E9

    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.

    Director:Matt Youngberg
    Writers:Joe Casey, Joe Kelly

    Be the first to start the conversation for this episode

  21. Ben 10: Ultimate Alien Season 2 Episode 11 - Moon Struck
    8.7/10(549 votes)

    #21 - Moon Struck

    S2:E11

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

    Director:Butch Lukic
    Writers:Len Uhley, Joe Casey, Duncan Rouleau

    Be the first to start the conversation for this episode

  22. Ben 10: Ultimate Alien Season 2 Episode 17 - Double or Nothing
    8.7/10(6 votes)

    #22 - Double or Nothing

    S2:E17

    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.

    Director:Matt Youngberg
    Writers:Len Uhley, Joe Casey, Duncan Rouleau

    Be the first to start the conversation for this episode

  23. Ben 10: Ultimate Alien Season 2 Episode 24 - Inspector #13
    8.7/10(6 votes)

    #23 - Inspector #13

    S2:E24

    A Techadon weapon master comes to Earth and wants the Ultimatrix.

    Director:Butch Lukic
    Writer:Geoffrey Thorne

    Be the first to start the conversation for this episode

  24. Ben 10: Ultimate Alien Season 1 Episode 19 - Absolute Power (1)
    8.5/10(689 votes)

    #24 - Absolute Power (1)

    S1:E19

    Kevin starts going after Plumbers kids to gain more power. Ben and Gwen continue to argue about how to handle the situation. Gwen tries to find someone who will help her cure Kevin.

    Director:Dan Riba
    Writers:Charlotte Fullerton, Joe Casey, Joe Kelly

    Be the first to start the conversation for this episode

  25. Ben 10: Ultimate Alien Season 2 Episode 12 - Prisoner #775 Is Missing
    8.5/10(570 votes)

    #25 - Prisoner #775 Is Missing

    S2:E12

    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.

    Director:Dan Riba
    Writers:Peter David, Joe Casey, Joe Kelly

    Be the first to start the conversation for this episode

Best Episodes Summary

"The Forge of Creation" is the best rated episode of "Ben 10: Ultimate Alien". It scored 9.5/10 based on 1178 votes. Directed by Dan Riba and written by Joe Casey, Joe Kelly, it aired on 11/12/2010. This episode scored 0.1 points higher than the second highest rated, "The Enemy of My Frenemy".