Ben 10 Ultimate Alien Season 1 Episode 13 — "Deep"

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The high-stakes race for the shards of the Map of Infinity dives into deep, uncharted territory in the thirteenth episode of Ben 10: Ultimate Alien, titled "Deep." Following the tragic fallback on Mykdl'dy, Ben Tennyson and his teammates trace Aggregor's signature to a bizarre, entirely oceanic world where a single misstep could drown an entire ecosystem.

To protect the second map piece from falling into the warlord's hands, the trio must descend to the absolute core of an underwater alien civilization. Utilizing specialized aquatic Plumber vehicles and the evolutionary adaptations of the Ultimatrix, Ben has to navigate crushing pressures, political alien tension, and an environment that actively dampens standard combat techniques.

“If Aggregor takes the core, this entire world collapses. There won't be any water left to swim in.”

Episode Summary

Ben, Gwen, and Kevin travel to the planet Piscciss (Ripjaws' home world), an entirely aquatic planet held together structurally by a centralized gravitational machine known as the Multiplier Core. To their dismay, they arrive to find that Aggregor has already breached the core chamber and stolen the planet's fragment of the Map of Infinity. Compounding the disaster, Aggregor also uproots the Multiplier Core itself to clear his exit, causing the planet's vast oceans to rapidly evaporate into deep space.

The heroes team up with Magister Pyke, a high-ranking local Piscciss Volann Plumber, to construct a plan to recover the core before the atmosphere completely vents. They pursue Aggregor's vessel into a treacherous sub-oceanic trench using Kevin's upgraded Rustbucket III in its submarine configuration. Along the way, they are forced to fend off aggressive swarms of primitive, shark-like sea predators reacting to the planetary shift.

When they corner Aggregor near an active thermal vent, a fierce underwater firefight breaks out. Ben pushes the Ultimatrix into an aquatic evolutionary state, making the highly anticipated debut of Ultimate Big Chill to flash-freeze the boiling currents, and later relies on Ampfibian to manipulate the local electrical signatures. Though they successfully reclaim the heavy Multiplier Core to plug the atmospheric rift and save Piscciss from total dehydration, Aggregor manages to escape into the cosmos with the second piece of the Map of Infinity securely in his possession.

Themes & Character Development

Environmental Devastation: The narrative shifts toward localized ecological stakes. Ben learns that Aggregor has absolutely no regard for collateral damage, willing to completely dry up a thriving world just to ease his pursuit of the shards.
Strategic Adaptability: Fighting entirely underwater forces Ben to abandon his standard brute-force land transformations. He must learn to lean heavily on specialized aquatic and energy-based aliens to counter the crushing environmental factors.
The Price of Compromise: The ending highlights a bittersweet victory. While the team successfully fulfills their Plumber vows by saving millions of local lives on Piscciss, they are forced to swallow the fact that Aggregor is now halfway to completing his reality-warping map.

Production Details

First Aired: October 22, 2010
Created By: Man of Action Entertainment, developed by Dwayne McDuffie and Glen Murakami
Written By: Marty Isenberg
Directed By: Dan Riba
Produced By: Cartoon Network Studios
Art Style: Beautiful, deep-sea sci-fi visual direction, utilizing complex fluid animation filters, bioluminescent alien lighting, and murky, high-pressure trench physics to immerse the viewer in an underwater world.
Voice Cast:
- Yuri Lowenthal as Ben Tennyson
- Ashley Johnson as Gwen Tennyson
- Greg Cipes as Kevin Levin
- Dee Bradley Baker as Magister Pyke / Ultimate Big Chill / Ampfibian
- John DiMaggio as Ultimate Aggregor

Fun Facts & Trivia

Did You Know?

This episode marks the first time in the franchise that audiences get to physically explore the planet Piscciss, which is the native evolutionary home world of the original series alien, Ripjaws.
Magister Pyke belongs to the Piscciss Volann species, sharing the exact same angler-fish-inspired physical traits and razor-sharp jaws as Ripjaws.
To survive the immense oceanic pressures of the planet's core without transforming, Kevin and Gwen wear advanced, sleek green-and-white Plumber deep-sea diving armor.
The name of the planet, Piscciss, is a clever creative play on the Latin word Pisces, which translates directly to "fishes" in English and represents the water sign in astrology.
Despite the heavy aquatic setting, Ben does not transform into Ripjaws or Water Hazard in this episode, opting instead for the unique electrical conductivity of Ampfibian to fight underwater.

Legacy & Impact

"Deep" successfully raised the architectural scope of the *Map of Infinity* story arc, demonstrating that the hunt would take the team to highly unique, structurally volatile alien worlds. By exploring the homeland of an original 2006 alien species, it delivered incredible world-building that expanded the overall lore of the galaxy.

The episode is highly praised by the fan community for its tense underwater atmospheric tone, fantastic vehicle action sequences, and the ongoing psychological threat of an unhinged Aggregor. It set up a continuous, high-octane pace for the remaining legs of the multi-planetary tournament arc.