List of Ben 10: Ultimate Alien episodes

This is a list of episodes in the American animated television series Ben 10: Ultimate Alien. A total of fifty-two episodes have been ordered so far.

Series overview

Seasons		Episodes	First air date	Last air date
	1	20	April 23, 2010	December 3, 2010

Season 1: 2010

EP#	Title	Director	Writer	Airdates	Prod. code
1	"Fame"	Dan Riba	Dwayne McDuffie	April 23, 2010 (2010-04-23)	101
Ben's secret identity is revealed to the entire world, and he is now a superhero loved everywhere by kids and teenagers, but distrusted by many adults. Kevin and Gwen find out who revealed Ben's secret and where he lives, and the three go to "pay him a visit". The informant turns out to be a young boy named Jimmy Jones, who has followed Ben's exploits ever since he was ten-years old. With Jimmy's help, Ben and company discover a series of alien attacks in Florida. An unknown alien steals a nuclear device from a prototype interstellar rocket. They follow the thief to his ship, which he intends to launch using the nuke. This would destroy central Florida. Once defeated, the alien, named Bivalvan, reveals he is a refugee named from the Andromeda Galaxy who was kidnapped by an alien named Aggregor. He is left restrained, with assurance that the Plumbers will be along to bring him back home. Ben reluctantly returns to school with some encouragement from Julie. The students greet him with applause, including his old bullies Cash and JT. Some time later, Bivalvan is found and recaptured by Aggregor.
2	"Duped"	Butch Lukic	Len Uhley	April 30, 2010 (2010-04-30)	102
Ben needs to be in three places at once; he has to fight the Forever Knights with Kevin, go to Julie's tennis game, and see a Sumo Slammers movie. Using Echo Echo, he divides himself into three copies and transforms back into human form, creating three of himself. However, each is one part of his personality: one is logical, one is sensitive, and one is immature. The sensitive Ben goes with Kevin to the museum, the immature Ben stays to watch Julie's match, and the logical Ben goes to see Sumo Slammers. Immature Ben proceeds to embarrass Julie while sensitive Ben cannot properly fight. When the Forever Knights steal a suit of powered armor, Ben calls in his other selves for assistance, only to quickly realize that none of them are good fighters alone. He recombines into one person and destroys the armor. Ben tries to apologize to Julie, which she almost accepts, until he admits he already went to see the Sumo Slammers movie when she suggests they go see it. Furious with Ben, Julie, Gwen, and Kevin storm off leaving him alone to repent for what he has done in order to gain back their trusts.
3	"Hit 'Em Where They Live"	Matt Youngberg	Len Wein	May 7, 2010 (2010-05-07)	103
Ben's enemies are targeting his parents now that he's famous. Max, unable to deal with them alone, has to enlist, Ben's aid. Vulkanus, Charmcaster, and Zombozo try to attack Ben's dad, but Ben, Gwen, and Kevin intercept them. Realizing that, as a team, Ben and his friends are too strong to beat, Zombozo decides to divide and conquer. He kidnaps Ben's mother and hides her in a carnival to lure the team out and separate them, but Ben and Kevin manage to beat Vulkanus and Charmcaster, respectively. Gwen is left to fight Zombozo, and briefly uses her Anodite form to scare him into leaving their families alone.
4	"Video Games"	Dan Riba	Eugene Son	May 14, 2010 (2010-05-14)	104
Ben's celebrity status lands him in a starring role in a video game. Using motion capture technology, they record the moves of his various alien forms to integrate them into the game. In reality, however, the video game offer is a ruse by TV reporter Will Harangue and his assistant Oliver as part of his plan to create a robot to defeat Ben. After defeating Ben twice and trashing his reputation, Harangue challenges Ben to a final showdown on live TV. Unable to defeat the robot conventionally, Ben realizes what Harangue has done and uses Nanomech, the one alien he couldn't get data on, to destroy the robot from within.
5	"Escape From Aggregor"	Butch Lukic	Charlotte Fullerton	May 21, 2010 (2010-05-21)	105
The turtle-like alien Galapagus is causing a rapamge in Bellwood. After managing to draw Ben out, he explains that he determined this to be the easiest method of finding Ben. He tells of how he escaped from Aggregor alongside four other aliens. Aggregor kidnapped them in a plot to permanently absorb their powers. Though the aliens escaped from Aggregor's spaceship, they crash-landed on Earth. After Ben's Ultimatrix scans Galapagus' DNA, he arranges for the Plumbers to get Galapagus back to his home planet. Unfortunately for Galapagus, Aggregor finds him first.
6	"Too Hot To Handle"	Matt Youngberg	Marty Isenberg	May 28, 2010 (2010-05-28)	106
P'andor (one of the aliens who were captured by Aggregor) offers a huge cash reward to anyone who can break him out of his containment suit. Kevin decides to take the job, only to back out upon learning that P'andor is highly radioactive. Since Kevin has the ability to open the suit using his Osmosian powers, P'andor tricks him into cutting it open. Free from his containment, P'andor begins feeding on all the energy he can find, making his way to a nuclear power plant. Working together, Ben and Kevin are able to trap P'andor back inside his suit, and deliver him to a pair of Plumbers who offer to take him back to his home world. Unfortunately, Aggregor intercepts the Plumbers' ship in space and recaptures P'andor.
7	"Andreas’ Fault"	Dan Riba	Ernie Altbacker	June 4, 2010 (2010-06-04)	107
When Ben, Kevin, and Gwen investigate an odd string of thefts by the Forever Knights, they learn that Argit is using Andreas (one of the aliens being hunted by Aggregor) to frighten them into making him their leader. Argit's plans go bad when the Forever Knights eventually revolt, and throw him into a dungeon with Ben and the others. When they discover that the Knights plan to execute Andreas, they break out and save him. As a last act of spite, their leader sets a bomb that will destroy everything within five miles. Andreas sacrifices himself to absorb the force of the explosion. Although Ben and company believe him to be dead, Andreas survives and is found by Aggregor.
8	"Fused"	Butch Lukic	Len Uhley	June 11, 2010 (2010-06-11)	108
After ambushing Ben at his house, Ra'ad (the fifth and last of the aliens captured by Aggregor) blames him for letting Aggregor recapture the other four aliens. Aggregor has been tracking them through the Ultimatrix each time it scans one of them. While trying to resist being scanned by the Ultimatrix, Ra'ad causes it to malfunction, and ends up deactivating it while both his and Ben's consciousnesses end up trapped within the same body. Despite Ra'ad's protests, Gwen and Kevin reactivate the Ultimatrix, and separate them. In doing so, they alert Aggregor to their location. Ra'ad flees, leaving the others to be wiped out by the Osmosian. After Kevin scolds Ra'ad for his cowardice, the alien decides to surrender himself to save Ben, and is recaptured by Aggregor. After the battle, Ben swears that he will do whatever it takes to save the captured aliens.
9	"Hero Time"	Matt Youngberg	Steven Barnes	June 18, 2010 (2010-06-18)	109
Ben saves actress Jennifer Nocturne from a group of thugs, and she is immediately smitten with him, much to Julie's ire. However, Ben's only interest is in Captain Nemesis, who shows up moments after Ben defeats the thugs. Nemesis was actually responsible for hiring the thugs, having hoped to boost publicity by rescuing Jennifer. He tries again by releasing a group of dangerous robots, only to be upstaged by Ben. After Ben casually comments on having defeated more of the robots than Nemesis, Will Harangue twists his comments into doubts about Nemesis' abilities. Nemesis decides to hold a friendly test of skill between them, and Ben again comes out on top. Finally pushed to the edge, he captures Julie and Jennifer, daring Ben to try and save them. Ben rescues Julie while leaving Jennifer to Kevin and Gwen, then defeats Nemesis (now calling himself Overlord). Overlord is arrested, while Gwen is quick to discourage Jennifer from getting close to her most recent male rescuer.
10	"Ultimate Aggregor"	Dan Riba	Dwayne McDuffie	October 10, 2010 (2010-10-10)	110
With all five aliens in his possession, Aggregor tries to return home to absorb their powers. A Plumber ambush damages his ship, so he instead heads for Los Soledad, in order to use Prof. Paradox's time machine as an alternate power source. Despite Ben, Kevin, Gwen, and Grandpa Max's best efforts, Aggregor succeeds in absorbing the aliens' forms and powers, turning himself into an unstoppable amalgam of the five.
11	"Map of Infinity"	Butch Lukic	Dwayne McDuffie	October 10, 2010 (2010-10-10)	111
With his new powers, Aggregor easily defeats Ben and his friends. Azmuth tells Ben that Aggregor intends to steal the Map of Infinity, a complete map of the entire universe. With it, he'll be able to find the Forge of Creation, the birthplace of the universe. He further explains that Aggregor stole the five aliens' powers to protect him from the traps guarding the map, which is split into four pieces. In order to keep him from assembling the map, the team tries to take the first piece of the Map of Infinity first. Aggregor however simply follows them and steals it after they disable the traps for him.
12	"Reflected Glory"	Matt Youngberg	Peter David	October 15, 2010 (2010-10-15)	112
After "helping" Ben, Gwen, and Kevin stop the Forever Knights, Cash and JT start a TV show with Oliver as their cameraman. Ben, Gwen, and Kevin play along for awhile. Upon tracking the Forever Knight, Ben, Gwen, and Kevin learn what the Power Decoupler is being used by the Forever Knights and attacks them with some interference from Cash and JT. Afterwards, Psyphon shows up to attack Cash and JT after seeing the broadcast of them taking the credit for given Ben his battle tactics. After Psyphon explains he tapped into Vilgax's power, he begins to defeat Ben. He is just about to defeat Ultimate Spidermonkey when Cash and JT fire the weapon the Forever Knights were charging, and it absorbs Psyphon's power. Ben light knocks him with his fist and Psyphon falls to the ground. Cash and JT are ecstatic, but find no-one saw them do it, and the weapon drained the camera's battery as well, leaving them with no recognition, and Cash shouting after Ben and the others.
13	"Deep"	Dan Riba	Marty Isenbarg	October 22, 2010 (2010-10-22)	113
Ben, Gwen, and Kevin travel to the center of a water planet, namely Pisces, Ripjaws' home planet in an attempt to find Aggregor. They end up getting help from Magister Pyke, one of Ripjaws' species. The planet has a 2% solid core, which holds an instrument that holds the planet's water together in a gravitational pull. Aggregor takes the instrument and reveals it to be a piece of The Map of Infinity. As the planet is pulling apart, Aggregor escapes. Ben transforms into Goop and uses Goop's anti-gravitational UFO in an attempt to fix the centripetal force holding the planet together. Goop vanishes, and Kevin says he was atomized and spread throughout the ocean. The water then turns green, and Goop pulls the planet back together.
14	"Where the Magic Happens"	TBA	TBA	October 29, 2010 (2010-10-29)	114
Gwen accidentally takes herself, Ben, and Kevin to a mystical dimension called Zoraster (which is Hex and Charmcaster's home world) where their only hope of survival rests with Gwen's enemy, Charmcaster.
15	"Perplexhahedron"	TBA	TBA	November 5, 2010 (2010-11-05)	115
Ben, Gwen, and Kevin race Aggregor through a deadly artificial planet known as Perplexhahedron that destroys anyone who enters it.
16	"The Forge Of Creation"	TBA	TBA	November 12, 2010 (2010-11-12)	116
Professor Paradox informs Ben that he alone holds the key to stopping Aggregor from tapping into the unlimited powers of Alien X.
17	"Nor Iron Bars A Cage"	TBA	TBA	November 19, 2010 (2010-11-19)	117
Kevin returns to his old Null Void prison in order to settle an old score.
18	"The Enemy of My Enemy"	TBA	TBA	November 26, 2010 (2010-11-26)	118
Argit infiltrates the Plumber Academy with a plan to help the Vreedle Brothers do the last thing anyone would expect them to do.
19	"Absolute Power, Part One"	TBA	TBA	December 3, 2010 (2010-12-03)	119
Ben is infuriated when Gwen asks Darkstar for his help defeating the team's deadliest and most unlikely foe. It's Ben and company's last stand against an enemy they can't bring themselves to fight!
20	"Absolute Power, Part Two"	TBA	TBA	December 3, 2010 (2010-12-03)	120
Ben is infuriated when Gwen asks Darkstar for his help defeating the team's deadliest and most unlikely foe. It's Ben and company's last stand against an enemy they can't bring themselves to fight!