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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!

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.

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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
    9.4/10(5 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 1 Episode 8 - Fused
    9.0/10(6 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

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

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  6. Ben 10: Ultimate Alien Season 1 Episode 14 - Where the Magic Happens
    9.0/10(4 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

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    The 20 WORST Episodes of Ben 10: Ultimate Alien

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  7. Ben 10: Ultimate Alien Season 2 Episode 10 - Ben 10,000 Returns
    9.0/10(5 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

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

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

    #9 - 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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  10. Ben 10: Ultimate Alien Season 1 Episode 5 - Escape from Aggregor
    8.8/10(5 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

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  11. Ben 10: Ultimate Alien Season 1 Episode 7 - Andreas' Fault
    8.8/10(6 votes)

    #11 - 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

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  12. Ben 10: Ultimate Alien Season 1 Episode 9 - Hero Time
    8.8/10(6 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

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  13. Ben 10: Ultimate Alien Season 1 Episode 15 - Perplexhahedron
    8.8/10(5 votes)

    #13 - 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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  14. Ben 10: Ultimate Alien Season 1 Episode 17 - Nor Iron Bars a Cage
    8.8/10(5 votes)

    #14 - 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

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  15. Ben 10: Ultimate Alien Season 1 Episode 18 - The Enemy of My Enemy
    8.8/10(5 votes)

    #15 - 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

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  16. Ben 10: Ultimate Alien Season 2 Episode 1 - The Transmogrification of Eunice
    8.8/10(5 votes)

    #16 - 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

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  17. Ben 10: Ultimate Alien Season 2 Episode 6 - Revenge of the Swarm
    8.8/10(5 votes)

    #17 - 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

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  18. Ben 10: Ultimate Alien Season 2 Episode 9 - It's Not Easy Being Gwen
    8.8/10(5 votes)

    #18 - 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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  19. Ben 10: Ultimate Alien Season 2 Episode 11 - Moon Struck
    8.8/10(5 votes)

    #19 - 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

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

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

    #21 - 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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  22. Ben 10: Ultimate Alien Season 1 Episode 10 - Ultimate Aggregor
    8.6/10(5 votes)

    #22 - 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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  23. Ben 10: Ultimate Alien Season 1 Episode 19 - Absolute Power (1)
    8.6/10(5 votes)

    #23 - 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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  24. Ben 10: Ultimate Alien Season 1 Episode 20 - Absolute Power (2)
    8.6/10(5 votes)

    #24 - 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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  25. Ben 10: Ultimate Alien Season 2 Episode 12 - Prisoner #775 Is Missing
    8.6/10(5 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

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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".