Ben 10 Ultimate Alien Season 1 Episode 19 — "Absolute Power: Part 1"

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The tragic descent of a rogue teammate shifts into absolute hyper-drive in the nineteenth episode of Ben 10: Ultimate Alien, titled "Absolute Power: Part 1." Acting as the first half of the monumental first season finale, the narrative reaches peak emotional tension as Kevin Levin's dark, energy-hunting rampage begins targeting closest friends and family.

When old allies fall prey to Kevin's hunger for energy, a massive philosophical divide completely fractures the remaining group dynamic. Armed with the evolution-ready hardware of the Ultimatrix, Ben Tennyson reaches a cold, uncompromising conclusion to put his friend down permanently, forcing Gwen into a desperate, forbidden alliance with a manipulative dark sorcerer.

“He has to be stopped, Gwen. Kevin's gone completely over the edge, and I'm going to finish this before anyone else gets hurt.”

Episode Summary

The episode opens with the pyronite-hybrid hero Alan Albright frantically fleeing across a rural cornfield. He is ruthlessly cornered by the mutated Ultimate Kevin, who aggressively drains Alan's unique flame-based traits. Ben arrives on the scene as NRG to drive Kevin off, only to discover a horrifying reality: Kevin has already tracked down and forcefully absorbed the powers of all the remaining Plumber's Helpers—including Helen, Manny, Pierce, and even Dr. Viktor.

Back at base, an intense argument breaks out between Ben and Gwen. Backed by Grandpa Max's heavy strategic calculations, Ben argues that Kevin has officially crossed the point of no return, meaning he must be executed to protect the planet. Refusing to give up on her boyfriend, a heartbroken Gwen sets off alone. She makes an incredibly desperate, ironic choice, hunting down her energy-vampire enemy, Michael Morningstar (Darkstar), to secure his dark knowledge of Osmosian bio-mechanics.

Darkstar reveals that a salvaged fragment of the ancient artifact known as the Dominus Librium could be used to siphon the absorbed cosmic energy out of Kevin, restoring his human body and sanity. However, it requires a massive, localized power grid to jump-start the artifact. Meanwhile, Ben tracks down old criminal mastermind Vulkanus, brutally beating information out of him regarding Kevin's supply routes until Gwen intervenes. The episode ends on a harrowing cliffhanger as Gwen confronts Kevin directly at the Total Zone refinery, only for Kevin's remaining shred of sanity to completely snap, trapping her inside a wall of fire.

Themes & Character Development

The Breakdown of Brotherhood: The core theme explores the tragic collapse of Ben and Kevin's brotherhood. Ben shifts away from his traditional idealistic second chances, choosing a gritty, pragmatic persona that prioritizes universal safety over personal sentimentality.
Desperate Alliances: Gwen's willingness to work alongside Darkstar highlights her total emotional isolation. She is willing to bargain with a literal energy parasite if it means preserving a microscopic fraction of hope for Kevin's survival.
The Erosion of Love: The heart-wrenching confrontation between Gwen and Kevin proves that Kevin's madness has over-ridden his deepest human attachments, showing that his love for her is no longer enough to contain the Osmosian craving for energy.

Production Details

First Aired: December 10, 2010
Created By: Man of Action Entertainment, developed by Dwayne McDuffie and Glen Murakami
Written By: Dwayne McDuffie
Directed By: Dan Riba
Produced By: Cartoon Network Studios
Art Style: Dark, bleak, and highly cinematic presentation, utilizing shadows, intense red fire particle arrays, and dreary industrial environments to perfectly capture the feeling of an impending tragic finale.
Voice Cast:
- Yuri Lowenthal as Ben Tennyson
- Ashley Johnson as Gwen Tennyson
- Greg Cipes as Ultimate Kevin
- Wil Wheaton as Michael Morningstar / Darkstar
- John DiMaggio as Vulkanus / Alan Albright

Fun Facts & Trivia

Did You Know?

"Absolute Power" serves as the spectacular, multi-part emotional finale for the first production block of the *Ultimate Alien* animated series.
The legendary character of Darkstar is voiced by sci-fi icon Wil Wheaton, who is globally famous for playing Wesley Crusher on *Star Trek: The Next Generation*.
The ancient energy siphoning artifact mentioned, the Dominus Librium, acts as a major callback to its original destructive introduction during the *Alien Force* episode *Trade-Off*.
When Ben as Humungousaur aggressively violently shakes Vulkanus to extract tracking coordinates, it highlights the single darkest, most unhinged behavior Ben has ever displayed as a hero.
The cliffhanger ending of this episode set real-world fan discussion forums completely ablaze, leading directly into the explosive final conclusion of the seasonal arc.

Legacy & Impact

"Absolute Power: Part 1" is globally celebrated by the Ben 10 community as an emotional tour de force and a masterclass in serialized dramatic animated writing. Written by late franchise icon Dwayne McDuffie, it successfully pushed the classic superhero tropes to their maximum boundaries, introducing deep psychological stakes where family members are forced to choose between execution and salvation.

The episode remains a fan-favorite for its complex character conflicts, sharp ideological dialogue, and the dramatic re-introduction of classic villains. It set a flawless foundation for a historic showdown, leaving viewers deeply invested in the ultimate fate of Kevin Levin's humanity.