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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!

The Best Episodes of Ben 10: Ultimate Alien

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...
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Episode Rankings

  1. #1 Fan Favorite
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    Ben 10: Ultimate Alien Season 2 Episode 25 - The Enemy of My Frenemy
    9.5/10(4 votes)

    #1 - 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

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  2. Ben 10: Ultimate Alien Season 2 Episode 26 - Couples Retreat
    9.5/10(4 votes)

    #2 - 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

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  3. Ben 10: Ultimate Alien Season 1 Episode 16 - The Forge of Creation
    9.2/10(1030 votes)

    #3 - 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

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  4. Ben 10: Ultimate Alien Season 2 Episode 9 - It's Not Easy Being Gwen
    9.0/10(979 votes)

    #4 - 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

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  5. Ben 10: Ultimate Alien Season 2 Episode 23 - Solitary Alignment
    9.0/10(5 votes)

    #5 - 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

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  6. Ben 10: Ultimate Alien Season 2 Episode 27 - Catch a Falling Star
    9.0/10(5 votes)

    #6 - Catch a Falling Star

    S2:E27

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

    Director:Butch Lukic
    Writer:Len Uhley

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    The 20 WORST Episodes of Ben 10: Ultimate Alien

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  7. Ben 10: Ultimate Alien Season 1 Episode 15 - Perplexhahedron
    8.8/10(766 votes)

    #7 - 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

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  8. Ben 10: Ultimate Alien Season 1 Episode 20 - Absolute Power (2)
    8.8/10(614 votes)

    #8 - 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

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  9. Ben 10: Ultimate Alien Season 2 Episode 10 - Ben 10,000 Returns
    8.8/10(646 votes)

    #9 - 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

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  10. Ben 10: Ultimate Alien Season 2 Episode 17 - Double or Nothing
    8.8/10(5 votes)

    #10 - 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

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  11. Ben 10: Ultimate Alien Season 2 Episode 24 - Inspector #13
    8.8/10(5 votes)

    #11 - Inspector #13

    S2:E24

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

    Director:Butch Lukic
    Writer:Geoffrey Thorne

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  12. Ben 10: Ultimate Alien Season 1 Episode 11 - Map of Infinity
    8.7/10(539 votes)

    #12 - 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

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  13. Ben 10: Ultimate Alien Season 1 Episode 19 - Absolute Power (1)
    8.6/10(586 votes)

    #13 - 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

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  14. Ben 10: Ultimate Alien Season 2 Episode 16 - The Flame Keeper's Circle
    8.6/10(5 votes)

    #14 - The Flame Keeper's Circle

    S2:E16

    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.

    Director:Dan Riba
    Writers:Joe Casey, Joe Kelly

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  15. Ben 10: Ultimate Alien Season 2 Episode 31 - The Ultimate Enemy (1)
    8.6/10(5 votes)

    #15 - The Ultimate Enemy (1)

    S2:E31

    Dagon is getting closer and closer to entering our dimension thanks to an old foe.

    Director:Matt Youngberg
    Writer:Matt Wayne

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  16. Ben 10: Ultimate Alien Season 1 Episode 5 - Escape from Aggregor
    8.4/10(527 votes)

    #16 - 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

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  17. Ben 10: Ultimate Alien Season 1 Episode 10 - Ultimate Aggregor
    8.4/10(511 votes)

    #17 - 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

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  18. Ben 10: Ultimate Alien Season 2 Episode 13 - The Purge
    8.4/10(5 votes)

    #18 - The Purge

    S2:E13

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

    Director:Butch Lukic
    Writers:Joe Casey, Joe Kelly

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  19. Ben 10: Ultimate Alien Season 2 Episode 15 - Greetings from Techadon
    8.4/10(5 votes)

    #19 - Greetings from Techadon

    S2:E15

    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.

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

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  20. Ben 10: Ultimate Alien Season 2 Episode 19 - The Ultimate Sacrifice
    8.4/10(5 votes)

    #20 - The Ultimate Sacrifice

    S2:E19

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

    Director:Butch Lukic
    Writers:Joe Casey, Joe Kelly, J. M. DeMatteis

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  21. Ben 10: Ultimate Alien Season 2 Episode 30 - The Beginning of the End
    8.4/10(5 votes)

    #21 - The Beginning of the End

    S2:E30

    The final battle between the Forever Knights and Dagon's Esoterica is in full swing, with Ben caught in the middle!

    Director:Butch Lukic
    Writers:Charlotte Fullerton, Eugene Son

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  22. Ben 10: Ultimate Alien Season 2 Episode 32 - The Ultimate Enemy (2)
    8.4/10(5 votes)

    #22 - The Ultimate Enemy (2)

    S2:E32

    Vilgax re-emerges in his most powerful form ever! Can Ben stop him and save the universe?

    Director:Dan Riba
    Writer:Dwayne McDuffie

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  23. Ben 10: Ultimate Alien Season 1 Episode 14 - Where the Magic Happens
    8.3/10(531 votes)

    #23 - 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

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  24. Ben 10: Ultimate Alien Season 2 Episode 12 - Prisoner #775 Is Missing
    8.3/10(491 votes)

    #24 - 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

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  25. Ben 10: Ultimate Alien Season 1 Episode 8 - Fused
    8.2/10(489 votes)

    #25 - 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

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Best Episodes Summary

"The Enemy of My Frenemy" is the best rated episode of "Ben 10: Ultimate Alien". It scored 9.5/10 based on 4 votes. Directed by Matt Youngberg and written by Brian Swenlin, David McDermott, it aired on 2/11/2012. This episode scored 0.0 points higher than the second highest rated, "Couples Retreat".