List of Ben 10: Alien Force episodes

This is a list of episodes in the American animated television series Ben 10: Alien Force.

Episodes

Season One (2008)

No. overall	No. in season	Title	Directed by	Written by	Original air date	Prod. code
1	1	"Ben 10 Returns, Part One"	Dan Riba	Dwayne McDuffie	April 18, 2008	101
After setting aside the Omnitrix some years ago, fifteen-year-old Ben Tennyson is enjoying a normal life. After winning a soccer game and meeting a girl named Julie, he visits Grandpa Max only to discover that he's disappeared. Inside Max's RV, the Rust-bucket, Ben finds a Holo-viewer with a recording from Max telling Ben that he has the Omnitrix and he's safe. However, Ben has had the Omnitrix ever since he took it off years ago. He asks his favorite, fifteen-year-old cousin Gwen for advice, wondering if Grandpa wants him to wear the Omnitrix again. Soon, they meet Magister Labrid, an agent of the Plumbers. Stating that he's Max's partner in a case he was working on, Ben and Gwen decide to team up with him. Ben decides to put the Omnitrix back on. The first place they go is to a train station where an arms trade between the Forever Knights and the DNAliens, brokered by Kevin Levin. They attempt to arrest the Knights and the aliens, and a battle follows. When Ben tries to dial in his alien on his Omnitrix, the device reboots and recalibrates into a thin watch with a color scheme of green and black, making it more stylish and giving him access to 10 new aliens which are more powerful than his aliens he had before. The DNAliens get away, the Forever Knights escape with one of the weapons crates, and Kevin is captured. The Plumber asks Kevin for help in finding the Knights' hideout. Kevin, having not been paid (so he says), leads the group to a large castle. Inside, they find all sorts of medieval artifacts, but Ben accidentally knocks over a suit of armor which awakens a robotic dragon. Note: Kevin seems to look at Gwen weirdly, then in a later episode admits he has a crush on Gwen. Omnitrix Alien Debuts: Swampfire (official debut)
2	2	"Ben 10 Returns, Part Two"	Butch Lukic	Dwayne McDuffie	April 18, 2008	102
Fleeing from the dragon, the group runs into an army of Forever Knights. In the ensuing confrontation, Magister Labrid is killed when he saves Kevin's life, and Kevin joins Ben and Gwen on their search for Max to repay that debt. Using a leftover Laser Lance, Gwen is able to trace it back to its original owners. The soon find a secret underground base, they discover an army of DNAliens. Sneaking in, the find that Max isn't there anymore, and on their way out encounter the Highbreed in charge of the ship. Annoyed at being discovered, the Highbreed commander defeats the team, and orders the termination of all life within a five-mile radius to eliminate any witnesses. Using Humongousaur, Ben is successful in his efforts to stop the commander, he learns that any damage he receives while transformed is inflicted upon his human form as well. Deciding to finish Max's last mission, Ben, Gwen, and Kevin become a team. But, according to another Highbreed deep inside another base, they have no idea what they're up against. Omnitrix Alien Debuts: Echo Echo (official debut), Humungousaur (official debut)
3	3	"Everybody Talks About the Weather"	Dan Riba	Dwayne McDuffie	April 26, 2008	103
The authorities of a local town named Grover's Mill arrest a half-human, half-Pyronite boy named Alan for arson and criminal damage. Alan is wearing a Plumber's badge, which the local sheriff triggers when he confiscates it. The badge signals Kevin's badge, which leads Ben, Kevin and Gwen to Alan, thinking Alan's badge is Max's. Elsewhere, Alan uses his pyrokinetic/thermokinetic abilities to escape the officers, and the resulting damage to a building leads the team to believe that Alan may have hurt Grandpa Max. After a battle with Alan, Ben discovers that the DNAliens are responsible for the damage, having built a huge, needle-like weather machine in the corn fields. With Alan's help, Ben destroys the machine, and afterwards Ben offers Alan to come with him, Gwen and Kevin. Alan decides to stay to clean up any DNAlien trouble that might still be in town, but offers to aid them whenever they need it. Omnitrix Alien Debuts: Jetray (official debut)
4	4	"Kevin's Big Score"	Butch Lukic	Matt Wayne	May 3, 2008	104
Kevin meets with an old friend of his named Argit, who claims he knows the location of a particular piece of alien tech Kevin is looking for. Needing something to bargain with, Kevin steals Max's RV, the Rustbucket. Unfortunately, upon seeing the huge amount of Plumber's tech and weapons in the old RV, Argit double crosses Kevin, and steals the RV for himself, planning to pay off his old debts. With Ben automatically suspecting the worst in Kevin, the team follows Argit with a tracking device that Kevin hid on the Rustbucket's under carriage. They find the RV, but it has been completely stripped for parts. Infuriated, Ben almost picks a fight with Kevin, but then Argit comes back. Using Echo Echo, the team is able to stop Argit. Still determined to get that piece of alien tech, Kevin storms away to seek out Vulkanus, having been told by Argit earlier he is in possession of the alien device. Kevin tries to make a deal with Vulkanus, but the later is still bitter over a double cross that Kevin pulled on him years ago. Vulkanus forces Kevin absorb a rare alien crystal called Taedenite, planning to use him as a living gem mine. He is rescued by Ben and Gwen and afterward, it is revealed that the item Kevin sought is a holo-viewer with another message from Grandpa Max, telling Ben that he will need to recruit a team of Plumber's kids. Omnitrix Alien Debuts: Big Chill (official debut)
5	5	"All That Glitters"	Dan Riba	Bob Goodman	May 10, 2008	105
Ben, Gwen, and Kevin set out on their mission to locate the other Plumber's children to recruit new members for their team. The first one they encounter is a young man named Michael Morningstar. Since Michael has all the Plumber's gear of his late father, as well as the fact that he seems to have been helping his city using his yellow-colored energy-controlling abilities, Ben and Gwen are quick to trust him. Kevin, however, remains suspicious (partly because of Gwen's romantic attraction to Michael). Seeing a reading on Michael's computers that there's a massive power draw at a local power plant, the team plus Michael decides to act. Finding a group of zombified school girls at the plant, the team engages in a short battle, and Michael "accidentally" lets them escape. Michael asks Gwen to dinner. Ben tries to stop him, but Kevin uses the opportunity to break into Michael's house to see if his suspicions are valid. As it turns out, Michael is making the zombies, draining the schoolgirls of their vital life-force energy and then commanding them to collect more strength for him. Fearing for Gwen's safety, they unfortunately arrive to help her too late. Michael drains Gwen's own magical abilities and becomes nearly unstoppable. With Ben and Kevin knocked out, Gwen saves the day by fighting back and comes to her senses by reabsorbing her abilities. Weakened and drained, Michael is then attacked by the school girls, leaving him withered and powerless. Omnitrix Alien Debuts: Chromostone (official debut)
6	6	"Max Out"	Butch Lukic	Jim Krieg	May 17, 2008	107
Gwen's older brother, Ken, is missing and Gwen asks for Ben and Kevin's help to find him. In their search, the gang stumbles upon a Highbreed base in a small town called Santa Mira that manufactures Xenocytes: headcrab-like parasites that mutate humans into DNAliens. Ken has been infected by one of the Xenocytes, but Ben is able to remove it with the help of the voice-automated Omnitrix. With Ken in tow, the gang finds Grandpa Max inside the base. He explains that the Xenocyte eggs will be shipped across the country, and asks the gang to destroy them. While they comply, he sets about destroying the factory while searching for the egg-laying machine. The gang finds Max locked in battle with a Highbreed Commander upon their return. In an act of self-sacrifice, Max uses an unfocused Null Void warp projector to destroy the Highbreed base. With his last words, he tells Ben to "Take it from here". Then everything and everyone, except Ben, Gwen, Kevin and Ken, is sent to the Null Void. In the aftermath, a group of disguised DNAliens are shown gathering surviving Xenocytes from the wreckage of the base.
7	7	"Pier Pressure"	Dan Riba	Len Uhley	May 31, 2008	106
The team is at one of Julie's tennis matches. Gwen tells Ben to ask Julie to go on a date with him to a local boardwalk amusement park the Pier, and after an awkward attempt by Ben to ask her, Julie agrees, and they go. Elsewhere, out in the forest, a small dog-like Galvanic Mechomorph seeps out of a crashed spaceship. Seeking a plumber's badge signature, the Mechomorph soon finds Ben and starts taking control of the rides to get Ben's attention. After a few failed attempts, the alien than uses a ride to kidnap Julie. Flying after the alien as Jetray, Ben tracks the alien to the ship. In the process, Julie finds out about the Omnitrix. Ben expects her to be freaked out, but Julie, however, finds Ben's secret very impressive, and even cool. The alien starts repeating the word "Ship", referring to the crashed space vessel. Deciding to call the alien Ship, Ben and Julie soon realize that what they though was a piece of the ships computer is in fact a bomb about to blow. Using Humungousaur to throw the bomb into space, they soon free the ship's wounded owner, Baz-El from the wreckage and help him fix his ship. Seeing how he has no use for Ship, Baz-El decides to leave Ship with Ben. It's dawn as Ben and Julie walk home. Ship chases a truck. Ben and Julie hold hands. Omnitrix Alien Debuts: Brainstorm (official debut)
8	8	"What Are Little Girls Made of?"	Butch Lukic	Matt Wayne	June 7, 2008	109
While Ben, Gwen, and Kevin are taking a break at Grandpa Max's favorite fishing spot, they see a mysterious cloaked woman leave a flower made of pure mana energy at the base of Max's favorite tree. When the team tries to meet her, she disappears. They decide to stake out the area for a while until the woman shows up again. The wait for three whole nights, and their patience is rewarded. The woman shows up, and is able to beat both Ben and Kevin in battle with ease. However, when she sees Gwen use her powers, she is amazed. As it turns out, Gwen's magical powers are in fact inherited from the strange woman, who turns out to be Ben and Gwen's long-lost paternal grandmother, Verdona, who is an immensely powerful energy being called an Anodite from the planet Anodyne. After getting the full story from Gwen's parents, Verdona offers to take Gwen back to her home planet, Anodyne, where she can learn how to reach the full and maximum of all of her magical and life energy-controlling abilities (which would require seventy-five years). Gwen tells Verdona that she cannot leave her friends, not while the Earth is in such danger. Verdona then transforms into her true Anodite form, and decides to destroy Gwen's human body, thus releasing the inner Anodite within. After a short battle, Gwen firmly tells Verdona that she wants to stay on Earth and stay the way she is, saying that it's what Max would have wanted. Verdona accepts this and leaves, though she promises to check up on Gwen once in a while to see how she is doing. Omnitrix Alien Debuts: Spidermonkey (official debut)
9	9	"The Gauntlet"	Dan Riba	Rob Hoegee	June 14, 2008	110
The team faces off against a Techadon robot seemingly intent on destroying them. Using the new alien Goop, Ben is able to make the robot explode. Kevin grabs the severed hand of the robot (possibly planning to put its defense mechanisms in his car). Later, the team goes to Mr. Smoothie's for a break. Two bullies named Cash and JT, who used to pick on Ben when he was 10, decide to embarrass Ben by spilling smoothie on him. Ben, however, stands up to them, and makes a point to the other people at the smoothy shop pointing out how pathetic JT and Cash really are. Later that night, they see Kevin's car outside a restaurant, and decide to wreck it for retribution. They push it down a hill, smashing the trunk open. The grab the Techadon gauntlet before the car's alarm attracts Kevin. Back at their hang out, and abandoned mannequin factory, Cash puts the gauntlet on, planning on using its built-in laser blaster to destroy Ben once and for all and repair their reputation. Over time, the full robot armor begins to reform around Cash's body. Worried about his friend, JT goes to Ben's team for help. Kevin wants to go it alone as revenge for his car, but is soon defeated by the now immensely powered Cash. Seeking Ben out, a battle at Mr. Smoothie's rages between Ben as Chromastone and the almost fully restored Techadon. In the end, Cash is able to force the robot back into the gauntlet and restore control over his own body. Ben is able to overpower Cash as Chromastone, and JT manages to convince Cash to fight the Techadon's influence, reverting it back into the gauntlet. JT thanks Ben, and takes Cash back home, with Gwen and Ben forgetting about a beat up Kevin still being in the mannequin factory. Omnitrix Alien Debuts: Goop (official debut)
10	10	"Paradox"	Butch Lukic	Jim Krieg	July 5, 2008	112
The team gets word of a strange creature roaming around an abandoned desert town named Los Soledad outside of Bellwood. The creature seems to be aging everything it touches at an accelerated rate. While Ben, Gwen, and Kevin investigate, see a strange man who seems to be able to disappear at will. After trying to fight him, the team soon formally meet the man known as Paradox, a scientist from the 1950s who was sucked into the event horizon of his time-travel experiment. Displaced from time and space, Paradox has existed for 100,000 years and is able to move through time at will. However, the same mistake that rendered him ageless created the creature they seek. The team is chased by the creature. It ages Kevin's car to dust, and even turns Kevin himself into an elderly man. After Paradox reverses Kevin's age, Ben realizes that the creature is not acting like a monster, but a confused person, going to phone booths and libraries, as though it was looking for information. Ben has Paradox take them back to the day of the time travel accident. The creature turns out to be Paradox's assistant, Hugo, who was also sucked into the event horizon. But instead of going through the same thing as Paradox, Hugo was turned into the aging creature and sent to the modern time. There, as Humungousaur, Ben rescues Hugo, nullifying the creature's existence. In the present, the now old Hugo joins Paradox in exploring time and space.
11	11	"Be-Knighted"	Dan Riba	Stan Berkowitz	July 12, 2008	108
Kevin has arranged a meeting for Ben with the Forever Knights, who need help in slaying a dragon they have kept captive underneath their castle for 1,000 years. Slaying the dragon is the very reason their organization exists. After teaming up with the Knight's mightiest warrior, Sir Connor, in a failed attempt to destroy the dragon, Ben notices that the dragon appears to be trying to communicate. Using Humungousaur to scare information out of one of the Knights, the team leaves the Knights behind and tracks the dragon to a warehouse where its spaceship is being held. Ben as Spidermonkey fits the dragon with a universal translator so it can speak, and it reveals that he is an alien mapmaker, but was captured by the Forever Knights. Angry after a millennium of imprisonment, the dragon arms itself to fight back. Ben convinces it to leave peacefully. Though the Knights believe to have lost their purpose, the news that a world full of dragons exists renews their pledge, as does their need to exact revenge on those who allowed it to return home.
12	12	"Plumbers' Helpers"	Dan Riba	Len Uhley	July 19, 2008	111
A pair of rogue half-human plumbers' kids, a female human-Kineceleran named Helen and a male human-Tetramand named Manny, have been attacking stray DNAliens and all other aliens they can find, and sucking them into a Null Void projector, believing it to have vaporized them. Believing that the team is DNAliens in disguise, they kidnap Kevin, intending to use him as bait for Gwen and Ben. After his rescue, the two sides work things out. After looking at a database of the aliens they captured and put into the Null Void, Ben realizes that some of them may have been Plumbers' kids. To make things right, the duo set out into the Null Void to rescue those they wrongfully imprisoned.
13	13	"X = Ben + 2"	Butch Lukic	Matt Wayne	August 31, 2008	113
The Incursion Emperor Milleous's daughter Attea is kidnapped by a bounty hunter named SevenSeven (Brother of SixSix). Unless she is returned, Milleous plans to destroy the Earth. The Emperor's majordomo, Raff, seeks out Kevin to help on the search. Using Gwen's powers to track her, they teleport to a nearby dam to rescue her. In the assuring battle, the Dam is broken, flooding everything. Having no other choice, Ben uses the untested Alien X to try to fix the dam. The task proves simple thanks to Alien X's vastly strong reality-warping capabilities, but Attea is yet again captured by SevenSeven. Even worse, Ben finds himself locked in endless debate with the other two separate personalities, Bellicus and Serena, inside the alien, unable to move or transform back without their consent. When all of them are teleported onto Milleous' ship, Kevin and Gwen have to protect Ben while trying to save the Earth from the double-crossing Attea who has used Sevenseven to help take over her father's empire. Seeing that Gwen and Kevin have been captured, and that the Earth is only seconds away from being destroyed, Ben finally grows tired of the fruitless debate and demands to be transformed into another alien which can actually get the job done. He manages to save the Earth as Swampfire, but resolves never to use Alien X again as its godly, omnipotent abilities are not worth the price. Omnitrix Alien Debuts: Alien X (official debut)
14	14	"Darkstar Rising"	Dan Riba	Dwayne McDuffie	October 10, 2008	114
After a Plumber setup to find out if the team has been masquerading as Plumbers, Ben, Gwen and Kevin are forbidden to fight against the Highbreed threat by Plumbers Magister Prior Ghilhil. Ghilhil has doubts the Highbreed are even as much of a threat as they claim. Elsewhere, a mysterious powerful new enemy 'employs' a Highbreed to attack the team. Having also tipped off Ghilhil, all three side are captured by the team's old enemy, Michael Morningstar. Now calling himself Darkstar, he captures all but Gwen, who manages to escape during the fight, to feed his ever hungry energy-draining abilities. With the help of the DNAliens, Gwen frees her friends. All of them finally defeat the Darkstar. As Michael is captured, the Highbreed Lord and the DNAliens manage to escape. In gratitude, Magister Ghilhil makes the team honorary Plumbers so they can defend the Earth legally and help the world.
15	15	"Alone Together"	butch lukic	Charlotte Fullerton	October 17, 2008	115
After an accident with a teleporter pod, Ben and a Highbreed officer named Reinrassic III are stranded on a desert planet called Turrawuste that is so inhospitable, it acts only as a routing station for the teleporter. The pair are forced to work together to fend off the dangerous predators on the planet while making their way to the routing station, much to Reinrassic's chagrin. As they make their way across the desert, the two save each other from danger several times from the violent native wildlife, even risking their own lives to do so. Ben tries to explain to the Highbreed that in the end, humans and Highbreed can have peace if they try, as they themselves are proof of that. After days of walking, they reach the teleporter pod. Much to Ben's disappointment, Reinrassic stays behind, having deemed himself contaminated by Ben and thus a risk to the purity of his species.
16	16	"Good Copy, Bad Copy"	Butch Lukic	Joseph Kuhr	October 24, 2008	116
A Galvan (the race that created the Omnitrix and gave Ben the form of Grey Matter) named Albedo builds his own Omnitrix and is permanently stuck in Ben's human form (since wearing the Omnitrix, Ben's DNA has become a default in the Omnitrix). Now, because they share DNA, they can change into the same forms as each other. Desperate to find Ben, Albedo resorts to destroying DNAlien hives and Forever Knight castles, demanding information on the teenage Omnitrix barer. When Gwen and Kevin hear rumors of Ben causing all that damage without them, they're naturally suspicious of the real Ben, who has been studying for a physics test the entire time. After making a chili fry run, the team sees Albedo at the same restaurant (as he has developed a craving for the chili fries, claiming it to be a human DNA weakness). Gwen and Kevin follow Albedo thinking he's Ben, leaving the real Ben behind in the process. They follow him to a forever Knight castle, Ben following as Big Chill. Albedo demands Ben's Omnitrix so that he can restore his Galvan form. Ben naturally refuses, and the resulting conflict causes both Ben and Albedo's Omnitrixes become attached, permanently damaging Albedo's human form. Azmuth arrives via teleportation and removes the face plate of Albedo's Omnitrix, ensuring his human form is both a punishment and a prison for proving himself as a lesser being. Albedo is teleported to a Plumber prison while Azmuth says to Ben that he was the one to use the Omnitrix for good, not evil. Azmuth leaves, warning the team that "Great trials lay ahead. Be ready."
17	17	"Save the Last Dance"	Dan Riba	Amy Wolfram	November 7, 2008	117
Gwen asks Kevin to take her to her school's dance, forcing a clueless Kevin to seek advice from Ben. However, Ben has his own problems. Big Chill is overriding the Omnitrix, and taking over his body with each transformation, Worse, Big Chill starts eating every metal object in sight uncontrollably. When Ben transforms back, he has no memory of his time as Big Chill. Asking Julie to help, she decides to follow Big Chill on her motor scooter, making notes of what he does. Big Chill, however, does not wish to be followed, and loses her. When Gwen hears about this, she decides not to attend the dance (much to Kevin's disappointment, has he studied dancing and fine dining extensively), and they, along with Julie, manage to track down Big Chill. The arrive seeing that Big Chill has constructed a large metal structure. Big Chill attacks them to defend it, and the teams manage to subdue the enraged alien. Kevin tries to destroy the structure, only to discover that Big Chill was building a nest for the eggs he had laid. The eggs hatch into infant Necrofriggians, and soon leave. Ben at last transforms back to his human state. Kevin teases Ben about being a "mother." Julie takes Ben home on her scooter. And, having missed the dance, Gwen and Kevin dance to the music in Kevin's car.
18	18	"Undercover"	Butch Lukic	Adam Beechen	November 14, 2008	118
After trying to test a broken teleporter pod, the team decide to enlist the help of Cooper Daniels, the young boy who had helped the Tennysons in the past. Upon reaching his home, they discover a video of his capture by the DNAliens. They track him down to the abandoned military base Los Soledad, where Paradox built his time machine. They discover that the Highbreed have erected a cloaking field, built by Cooper over the area, concealing a huge, mysterious arch-like device. They find Cooper helping to assemble pieces for the DNAliens out of a metal call barsidium. They free Cooper, but are soon captured by the Highbreed in charge of the base. Locking the team up in a storage room, they use Kevin's powers to absorb some of the barsidium, and use him as a tuning fork to amplify Echo Echo's powers, having discovered that the DNAliens are weakened by the strong reverb given off by the barsidium. They free Cooper and have him destroy the cloaking generator, during which he has visions of the arch acting as a gateway for a fleet of ships and the Earth being destroyed. The team is successful, and escapes. However, despite destroying the generator, the Highbreed manage to repair it and continue their operations unhindered, using ID masks to fool the local police by pretending to be construction workers, saying that soon, Los Soledad will be where all the action is happening.
19	19	"Pet Project"	john fang	Len Uhley	November 21, 2008	119
Forever Knights' scientist Dr. Joseph Chadwick sends Sir Morton to kidnap Ship so that the Forever Knights can use him to mass-produce a fleet of interstellar spacecraft with which to attack the homeworld of the alien dragon that escaped them. (After the events at the Pier, ship had been staying with Julie.) At this time, Ship had hitched a ride in the mechanisms of Kevin's car, trying to stay with Julie, who was with Gwen and Kevin on their way to the local shopping mall. Morton attacks Ship, capturing the small alien and leaving Kevin's car in dire need of repair. Ben arrives too late, and the team sets out to find the Knights. Assuming that the Knights have something to do with a medieval-themed track of houses, the team, joined by Julie, attempt to sneak into the main house to recuse Ship. However, by this time, Chadwick had affixed a mind control on Ship, making his biometric markings go from green to red, and leaving him totally under Chadwick's control. Having absorbed the alien spacecraft that Chadwick made, the Knights now have the ultimate weapon. The team soon gets caught, and are to be executed by Ship. Desperately, Julie uses a trick she saw in an old alien movie, and is able to convince Ship to resist. With Ship now on their side, the Forever Knights' stronghold is destroyed and the team now has access to Ship's spaceship mode, as long as Ben helps Julie take care of Ship.
20	20	"Grounded"	Dan Riba	Jim Krieg	November 26, 2008	120
While fighting one of the Highbreed, Ben's parents catch him transforming into Swampfire. Seeing as he comes home with a black eye, they forbid him from using the Omnitrix ever again for fear of him getting hurt. With Gwen and Kevin on the trail of a Highbreed plot, Ben tries to sneak out of the house as Echo Echo. Once Ben's parents see that he disobeyed their orders, they do what they think is best for their son's protection and safety and ground him. His various attempts to aid his allies by phone and by computer only results in Ben being forced to tell his parents about Gwen helping him, resulting in her suffering the same fate as her cousin, and leaving Kevin alone to find out what the Highbreed are up to. Kevin manages to find out that the Highbreed are planning to use radioactive bat guano as a power source for a "surprise" (the hyperspace jumpgate in Los Soledad). Having been captured, Kevin's trouble with the DNAliens results in Ben making a final attempt to persuade his parents to his cause, saying that if he does not help Kevin, it would be against everything they ever taught him, and so escapes as Humongousaur nonetheless. After a short battle aboard a small freighter carrying a rare isotope which the DNAliens plan on using, Ben's parents come to the rescue, with one of Grandpa Max's old Plumber guns, admitting that they are proud of Ben. They win the fight, and destroy the ship. They cancelled the punishment, apologized for the mistake, and say they understand what he needs to do.
21	21	"Voided"	Butch Lukic	Jim Krieg	December 5, 2008	121
Helen and Manny use Gwen's powers to call on Ben's team to help deal with a dangerous foe in the Null Void: D'Void. Ben goes in alone, with Kevin and Gwen waiting on the other side to bring him back. Once inside, Ben is shocked to learn that "D'Void" is really his old enemy Dr. Animo, who has taken control of the Null Guardians and enslaved the inhabitants of the Null Void. Using them as slave labor, he has built a machine to drill through the dimensional wall, hoping to bring his army to Earth. With the help of Grandpa Max, who was transported to the Null Void in Max Out and has been leading a resistance movement under the name of 'The Wrench". He, along with Ben, Helen, Manny, Pierce, and a small force of rebels they've gathered, attack D'Void's forces, and Ben manages to destroy the drilling machine as Big Chill. Gwen opens a portal back to Earth for Ben, but Grandpa Max cannot join them yet as things have to be set right in the Null Void first.
22	22	"Inside Man"	John Fang	Matt Wayne	December 12, 2008	122
The team rescues a young man named Tyler, who stole the Oscillator Key for the Highbreed's hyperspace gateway from Los Soledad. He crashes the truck and suffers memory loss as he escapes. After being almost captured by the DNAliens in a small town, the team saves him and are forced to race the DNAliens to track down the device, resulting in a battle. The team is victorious, but they discover that Tyler is actually a DNAlien, having managed to resist the Xenocyte controlling him, and only looked human through the use of an ID Mask. More DNAliens arrive in a small tractor beam-equipped ship to reclaim the Oscillator Key, capturing Tyler during the struggle. Ben opts to save Tyler instead of retrieving the Oscillator Key, and uses the Omnitrix to restore him to human form. As the DNAliens escape, the four now know their plan and prepare to take action.

Season Two (2009)

No. overall	No. in season	Title	Directed by	Written by	Original air date	Prod. code
23	1	"Birds of a Feather"	Dan Riba	Stan Berkowitz	March 24, 2009	201
The prince of the Arachnachimps (Spidermonkey's race), Simion, needs help in retrieving a crystal which is supposedly the symbol of the monarchy on his planet. The crystal is being kept in a base on the moon. Ben offers his help, but Kevin and Gwen are skeptical. In the midst of the battle, Ben discovers that Simion has been lying, and that the crystal is actually powering an intergalactic communications station. By stealing it, Simion will prevent Earth from calling for help against the upcoming Highbreed invasion. Ben tricks Simion into stealing a box containing a dispenser of worthless DNAlien resin remover acid instead, resulting in Simion having a very unpleasant encounter with the Highbreed commander that employed him.
24	2	"Unearthed"	Butch Lukic	Charlotte Fullerton	March 25, 2009	202
A DNAlien mining operation under Los Soledad uncovers an alien spacecraft, from which a large alien creature is released. It wanders around the nearby town collecting random items, eventually attracting the attention of Ben, Gwen, and Kevin. After a short battle, they realize that the alien is in fact a baby girl. The Alien perceives Gwen as an Anodite and hangs on her every word. Needing to return the baby to her parents, the team follows her back to her ship. After defeating the DNAliens who were mining the quartz rock to finish the jump gate, the team wakes the baby's parents, who depart the planet after Ben explains that they've been in suspended animation for fifty years as a result of Paradox's time experiment in 1952.
25	3	"War of the Worlds, Part One"	Dan Riba	Dwayne McDuffie	March 27, 2009	203
Paradox and Azmuth arrive on Earth to warn Ben of the approaching Highbreed fleet. Gwen and Kevin gather all the allies they've met (Alan, Cooper, Julie and Ship, as well as their enemy Darkstar) to counter the threat. Meanwhile, Azmuth reveals to Ben that the Omnitrix contains the DNA of every sentient species in the galaxy, over one million in total, and unlocks the Master Control so Ben can effectively combat the Highbreed. This includes all of his old aliens. With Ben as Cannonbolt, the team converge on the Highbreed hyperspace jump gate in Los Soledad in an effort to prevent its activation, but the attack only provokes the Highbreed in charge to summon the fleet ahead of schedule. To try and stop the fleet coming through, the team with Ben as Upchuck attempts to destroy the hyperspace jump gate but it does not work. Ben then turns into Way Big, and tries to rip down the gateway, it starts to work but as the Highbreed in charge now preemptively activates the gate, it initiates and knocks Ben unconscious. Omnitrix Alien Debuts: Cannonbolt (Alien Force debut), Upchuck (Alien Force debut), Way Big (Alien Force debut), Wildmutt (Alien Force debut)
26	4	"War of the Worlds, Part Two"	Butch Lukic	Dwayne McDuffie	March 27, 2009	204
The team has to get to the captain of the fleet, on the Highbreed head ship to stop the invasion. Ben, Gwen and Kevin quickly head to the captain of the fleet. The Highbreed commander and the team fight, and an enraged Gwen unleashes her dormant Anodite form for the first time in a desperate attempt to save Kevin, but returns to her normal human form. The trio is then surrounded by a group of DNAliens, but are saved by Grandpa Max, Pierce, Helen and Manny plus one Null Guardian, who have regained control over the Null Void. Ben, Gwen, Kevin, Azmuth and Ship as a spaceship head to the Highbreed's home world to confront the Highbreed Supreme with Ben as Brainstorm being the pilot. The Highbreed Supreme refuses to recall the fleet, and Azmuth reveals that the Highbreed's obsession with genetic purity has resulted in sterility in their species: they intend to cleanse the galaxy of all life in retaliation. Using the Omnitrix, Ben sends out an energy wave that reprograms the DNA of every Highbreed in the galaxy, fusing their DNA with random species from the Omnitrix to repair their genetic damage. Stunned and horrified at the loss of the genetic unity, the Highbreed Supreme immediately consider racial suicide as their only honorable option, but Reinrassic III, who has returned, convinces his race that their new impurity is desirable, and the fleet is recalled. Max decides to take in Ben's recruits (all except Darkstar, who ran off) and train them. As a side effect of reprogramming the Highbreed genetic damage, Ben finds the Master Control has been reset, leaving him with brand new aliens as well as his old ones. Omnitrix Alien Debuts: Lodestar (official debut)
27	5	"Vengeance of Vilgax, Part One"	Dan Riba	Dwayne McDuffie	September 11, 2009	205
Vilgax resurfaces with a new army and new and stronger powers. Under the Galactic Code of Conduct, he challenges the greatest champion of each world he visits to single combat, the prize being that champion's planet. Each time he defeats a champion, he absorbs their powers. With the strength of ten heroes at his disposal (including Ultimo's), Vilgax heads to Earth and challenges Ben, giving him 24 hours to prepare. In order to gain a sporting chance, Ben attempts to unlock the Omnitrix's Master Control, despite Azmuth's warnings. Ben's attempts to unlock the Omnitrix cause an overload. Ommnitrix Alien Debuts: Heatblast (Alien Force debut)
28	6	"Vengeance of Vilgax, Part Two"	Butch Lukic	Dwayne McDuffie	September 11, 2009	206
The overload releases the base forms for Chromastone, Spidermonkey, Goop, and Way Big. Kevin is also trapped in a mutated metal/rock/wood/crystal form by the energy release. Ben, Gwen and Kevin set out to recapture the four released forms under the orders of Azmuth who tells Ben he won't help him again. They are able to capture three of the four, but Way Big is too far away to reach in time. Ben leaves to fight Vilgax while Gwen and Kevin retrieve Way Big. The battle goes badly for Ben at first, as Vilgax's powers and wide array of weapons are able to overcome his alien forms. When Gwen and Kevin return with Way Big, Ben attempts to use the form, only to end up as Chromastone instead. Vilgax destroys Chromastone, but Ben regenerates from the remains into Diamondhead. Using Diamondhead, Ben easily defeats Vilgax. Vilgax is banished from Earth and never allowed to return, but promises to get his revenge somehow. Ommnitrix Alien Debuts: Diamondhead (Alien Force debut)
29	7	"Inferno"	John Fang	Len Uhley	September 18, 2009	207
Ben, Gwen, and Kevin are sent to investigate an attack by Pyroxivors (a race of subterranean alien cattle) on an oil drilling operation. Deep underground, they discover the humanoid mole-like alien named Moldywarp, their owner. He explains that the creatures were driven above ground by Vulkanus, who has been secretly drilling into the Earth's depths. He plans to drop a bomb into the earth's core, thereby raising the temperature of Earth to match that of his home planet. Ben manages to stop the bomb before it can reach the core, and Moldywarp uses his cache of explosives to seal the cavern permanently.
30	8	"Fool's Gold"	Dan Riba	Eugene Son	September 25, 2009	208
A species of humanoid Pygmy goat-like aliens come to Earth for a Popcorn Festival in Walton. These aliens feed on popcorn and defecate solid gold, which keeps the town running. Ben, Gwen, and Kevin are called in by one of the aliens named Orb, who has lost track of his friend, Decka. Mayor Coleman has kidnapped Decka in hopes of having a constant supply of gold, but when he feeds the alien meat, he morphs into his primal form that will multiply uncontrollably if it absorbs enough energy. After being told that the species cannot digest silicon, Ben sacrifices himself by feeding Decka an army of Echo Echos, causing him to vomit up everything he ate, including Ben, and return to normal. He and Orb then leave in their ships, with an angry Decka stating that he will tell everyone what Mayor Coleman did to them and they will never come back. Kevin gives Gwen a locket to remember his human form by before the accident. Though Gwen assures him that she does not care what he looks like, Kevin is adamant in his self-loathing.
31	9	"Simple"	Butch Lukic	Stan Berkowitz	October 9, 2009	209
After receiving a message from a five-year-old alien named Probity, Ben convinces Kevin and Gwen to help end a war on the child's home planet. The two sides are bent on war, however; even kidnapping and threatening the respective generals, who are themselves too stubborn to reach an agreement, fails. Ben transforms into Way Big so he may speak to the entire planet at once, but inadvertently worsens the situation when he accidentally destroys the planet's hero's statue. This ironically unites the entire planet in its hate for Ben. Meanwhile, Kevin who has been selling weapons to either side, along with Argit, decides to run with the profits he has made but is instead forced to leave the money behind. The money is discovered by Probity (who was dissatisfied with Ben's attempts to stop the war, her initial admiration turning into hatred).
32	10	"Vreedle, Vreedle"	John Fang	Charlotte Fullerton	October 16, 2009	210
Rhomboid and Octagon Vreedle are hired to return Ship to his "parent" Baz-L. Ben and Kevin travel to Coda to dispute Baz-L's claim to Ship (since Baz-L himself had conceded ownership of Ship to Ben and Julie in "Pier Pressure") while Gwen and Julie, with Ship as a Galvanic Mechomorph suit for her, stay behind to hold off the Vreedle Brothers. Ben convinces Judge Domstol to rule in his favor and they arrive on Earth in time to save Ship and defeat the Vreedle Brothers. Despite his reluctance, Baz-L accepts that Ship belongs to Julie now. Note: This was originally called "Don't Fear the Repo", but it was later changed to "Vreedle, Vreedle".
33	11	"Singlehanded"	Dan Riba	Marty Isenberg	October 23, 2009	311
A alien bounty hunter named Sunder attempts to remove the Omnitrix from Ben. His energy axe reacts with the Omnitrix, sending Ben into the Null Void but with his left hand still on Earth, connected by a dimensional rift. Ben's hand, acting of its own accord, locates Julie, who takes it to Gwen and Kevin. While Kevin works to reunite Ben with his hand, Julie and Gwen hold off Sunder. They use the hand to fight off Sunder while Kevin builds a device to return Ben to Earth. In a twist of irony, Ben is brought back on Earth while his hand is sent to the Null Void. Using Sunder's axe in combination with his own device, Kevin restores Ben and Sunder is sent to the Null Void.
34	12	"If All Else Fails"	Butch Lukic	Adam Beecham	November 6, 2009	312
An earthquake wakes a Highbreed officer, who was put into stasis and only to be awakened if the Highbreed lost the war. Under his orders, he triggers a weapon of last resort meant to destroy Earth. Mind-controlling seeds take over Grandpa Max and four others, using Max as the brain for a living bomb that will end all life on the planet. The Highbreed officer refuses to believe Ben's claims of peace, and won't divulge how to stop the creature. While Gwen and Kevin try to slow it down, Ben enlists the aid of Reinrassic III to get the Highbreed officer to cooperate. Unable to stop the monster from the outside, Ben, Gwen, and Kevin sneak inside the monster to destroy it within. They manage to save the humans being used as its brain and the Highbreed officer sacrifices himself to dispose of the creature safely.
35	13	"In Charm's Way"	John Fang and Rick Morales	Peter David	November 13, 2009	313
Kevin is upset by his inability to change back to human form and he vents his frustration by blaming Gwen for her inability to help. Charmcaster, seeking to steal Gwen's magical powers, romantically charms Kevin to trick her into walking into a trap. Despite discovering the ruse and coming prepared, Gwen is still drained of her magic. Kevin tricks Charmcaster into returning to Ben and Gwen, allowing Gwen to reverse the power-draining spell and regain her powers. Gwen then sucks Charmcaster into a magical vortex. After being drenched with a smoothie, Kevin cleans off in a lake, once again blaming Gwen for his inability. Angry with Kevin, Ben informs him that Gwen has been devoting all of her spare time to try and find a cure for his condition in various spellbooks, leaving Kevin shocked and ashamed for his actions.
36	14	"Ghost Town"	Dan Riba	Nicole Dubuc	November 20, 2009	314
Vilgax springs Ghostfreak from his prison for the secrets of the Omnitrix, but Ghostfreak betrays him and starts to possess the people of planet Vilgaxia, Vilgax's home world named after him in his honor. After his battle with Ghostfreak, Vilgax returns to Earth to seek Ben's help. Ben, Gwen, Kevin, and Vilgax travel to Vilgaxia to stop him. Ben comes up with a plan for Ghostfreak to possess his body so his DNA will return to the Omnitrix, but Ghostfreak takes over Ben. Just when Ghostfreak is about to take over Vilgax's body as well, he hits Ghostfreak with an explosion of light, weakening Ghostfreak to the point where Ben could control him again. Omnitrix Alien Debuts: Ghostfreak (Alien Force debut)
37	15	"Ben 10: Alien Swarm"	Alex Winter	John Turman & James Krieg	November 25, 2009	315
This is a live-action film based on the animated series. An old friend of Ben and Gwen comes to town to enlist their help to find her father, whose disappearance is somehow connected to some advanced nanochips. Gwen, Kevin, and Max refuse to help Elena, but Ben agrees to help Elena, but what they find may put the whole planet in danger. Omnitrix Aliens Debuts: Nanomech (official debut)
38	16	"Trade Off"	butch lukic	Len Wein	December 4, 2009	316
Kevin and Darkstar (Michael Morningstar) set aside their differences to find an alien artifact called the Dominus Librium which can cure their respective conditions. It works, making them both powerless humans. Michael keeps the artifact. Gwen finds out about Kevin's alliance with Michael and confronts Michael about it, only to discover that he planned for her to do so. Using the Dominus Librium, he steals her powers, then Ben's when he and Kevin come looking for her. Kevin, despite being powerless, manages to grab the Dominus Librium, shattering it and returning both himself and Darkstar to their previous forms. Darkstar escapes, promising revenge.
39	17	"Busy Box"	Rick Morales	Jake Black	December 11, 2009	317
Ben, Gwen, and Kevin find a curious alien box called the Naljian Destructor, which can robotically duplicate anything and anyone it sees. It quickly copies the powers of Ben, Gwen, and Kevin as they attempt to destroy it before finding out that it is only confrontational if it is attacked. The Vreedle brothers then show up to take the Destructor for themselves. As it has already learned to copy the trio's powers and sees them as enemies, they escape easily. However, the Vreedle Brothers return in short order as the Destructor has become uncontrollable and much more destructive. They try to leave it on Earth, but it blows up their ship when they try to retreat. After a long battle, the trio manages to remove its power source. As soon as it's neutralized, an alien arrives to reclaim it, explaining that it is merely an extra-dimensional children's toy.

Season Three (2010)

No. overall	No. in season	Title	Directed by	Written by	Original air date	Prod. code
40	1	"Con of Rath"	Dan Riba	Len Uhley	January 8, 2010	301
Zaw-Veenull, a Lewodan Ambassador asks Ben to deliver their Crown Prince Tiffin to Jarret in order to keep peace between the two species. Shortly after their trek begins in space, the Omnitrix malfunctions and turns Ben into an Appoplexian named Rath who wants to fight anything that breathes. The worst part is that Rath can't change back into Ben. Rath keeps picking a fight across the galaxy with anyone who crosses their paths and things don't look good as they approach the Pantaphage homeworld on a mission of peace. During their trek the team encounter's various villains they've faced in the past Argit, the Vreedle Brothers (clones of the originals), Vulkanus, and the Incurseans. When they finally reach Pantaphage, they discover that Tiffin is a meal for Jarret after which Rath jumps down his throat, rescues the Tiffin and threatens Jarret to never attack the Luoadans. After returning the Tiffin, Kevin revealed that the Tiffin was the one who was causing the malfunction, which has Ben about to beat up Kevin as Rath. Omnitrix Alien Debuts: Rath (official debut)
41	2	"Primus"	Butch Lukic	Charlotte Fullerton	January 15, 2010	302
In the middle of a fight with another Techadon Robot, Ben, Gwen, and Kevin are unexpectedly transported by the Omnitrix to an artificial alien planet called Primus. They soon discover that the planet is actually created by Azmuth, for it contains all the DNA samples from every life form in the galaxy. They soon learn that Vilgax is there to stop the Omnitrix at its source and that the Omnitrix's fail-safe program brought them there to defend the planet. Azmuth attempts to stop Vilgax, but loses and Ben is captured along with Kevin and Gwen. Ben offers to teach Vilgax about the Omnitrix if he lets Gwen and Kevin go. He turns Vilgax into Goop, shuts off Goop's artificial gravity projector and removes the Omnitrix from his immobile body. Ben then uses Way Big to throw a giant Vilgax (caused by immersion in the Codon stream) off the planet and, though it doesn't make up for damaging the Omnitrix, Azmuth "thanks" Ben by letting him keep it.
42	3	"Time Heals"	Rick Morales	Len Ulhey	January 22, 2010	303
Gwen, as Lucky Girl, steals the Archamada Book of Magic from Hex's mansion that allows her to travel back in time so she can stop the Omnitrix from overloading back in Vengeance of Vilgax. Paradox intervenes just before she casts the spell, trying to convince her that time traveling has dire consequences. Despite Paradox's warning, Gwen went back in time. When she returns to the present, she learns from Paradox that she was killed by Charmcaster, Ben was defeated by Hex, and Kevin's been made into a rock-skinned slave of Charmcaster. Paradox stated that Gwen interfering in the past kept them from being strong enough to stop Hex. She then breaks into Hex's mansion and finds an injured Ben. Ben buys Gwen time and Gwen activates the time spell again. This time she convinces both her past selves not to interfere and wipes the memory of the Gwen that belongs in that time period. The two time-traveling Gwens go home and the present Gwen takes the present Ben and present, monstrous Kevin to Mr. Smoothie's. On the way, the gang run into Paradox again who says, "Everything is fine."
43	4	"The Secret of Chromastone"	Dan Riba	Rich Fogel	January 29, 2010	304
When Ben gets sick, he's pleased to see an old friend, Tetrax, but is caught off guard when Tetrax demands Ben give him Chromastone. Tetrax tries to change Ben into Chromastone, but instead changes into Diamondhead. Ben doesn't even have a chance to explain what happened to Chromastone when Tetrax attacks him demanding that he be handed over. Tetrax shatters Diamondhead and reveals Sugilite(Petropia's Guardian and Chromastone's genetical donor) inside. Sugilite soon flies to Petropia, Tetrax's homeworld. Tetrax soon explains about why he needs Chromastone. He tells Ben, Gwen, and Kevin about Chromastone being the only one to save Petropia with a crystal. Ben's situation gets worse when Vilgax shows up and it is learned he is after the crystal. Ben, Gwen, Kevin, and Tetrax fight Vilgax until Kevin accidentally tells Vilgax what's going on. Vilgax flies to Petropia, while Ben, Gwen, Kevin and Tetrax go pursue him aboard Tetrax's ship. Vilgax soon arrives to Petropia and fights Sugilite, grabs the crystal off of him and flies back to Vilgaxia. Sugilite grows another crystal which Ben (as Diamondhead) uses to finish the procedure of saving Petropia.
44	5	"Gwen's Top 10 Shots"	Dan Riba	Len Uhley	March 1, 2010	305
A top 10 countdown of Gwen's best moments.
45	6	"Kevin's Top 10 Last Minute Saves"	Rick Morales	Rich Fogel	March 2, 2010	306
A top 10 countdown of Kevin's best moments.
46	7	"Top 10 Scariest Moments"	Dan Riba	Eugene Son	March 3, 2010	307
A top 10 countdown of the scariest moments in the series.
47	8	"Top 10 Gross Moments"	Butch Lukic	Charlotte Fullerton	March 4, 2010	308
A top 10 countdown of the grossest moments in the series.
48	9	"Top 10 Hardest Punches"	Rick Morales	Eugene Son	March 8, 2010	309
A top 10 countdown of the best punches in the series.
49	10	"Top 10 Supporting Characters"	Matt Youngberg	Ernie Altbacker	March 9, 2010	310
A top 10 countdown of the best supporting characters in the series.
50	11	"Top 10 Aliens"	Seung-Hyun Oh	Jake Black	March 10, 2010	311
A top 10 countdown of the best aliens in the series.
51	12	"Top 10 Villains"	John Fang	Rob Hoegee	March 11, 2010	312
A top 10 countdown of the best villains in the series.
52	13	"Above and Beyond"	Butch Lukic	Eugene Son	March 12, 2010	313
Max sends a message to the Plumbers' Helpers when Ben is attacking Max at a space station. Alan, Helen, Manny, and Pierce arrive to the space station and plan to stop Ben. Pierce suggests they work and stay together, but no one listens. Helen, the first to leave the group, finds Ben, but is defeated by Echo Echo. Later the team splits into two. Alan and Pierce get separated and Pierce ends up getting attacked and beaten by Goop. Later, Manny and Helen get separated and get attacked and beaten by Rath. Helen, Manny, and Pierce regroup and try to find Alan. Alan soon finds Ben where he is attacked by Big Chill. Pierce, Manny, and Helen rescue Alan and try to beat Ben, but he manages to escape. Pierce suggests they work together and attack as a team. Soon they find Ben, who goes Humongousaur at full size and fights the Plumbers' Helpers. They soon suggest to attack Ben at once and throw Humongousaur into space. Because Humongosaur's weight threw off the balance of the ship's gravity control backup systems, they realize the ship is falling out of orbit, about to crash into London, so they sacrifice themselves for Earth by self-destructing the ship, but it doesn't explode. Max and Ben reveal that it was all a test, except the part with the space station crashing into London, and that they're soon heading to the Plumbers' Academy. Note: Gwen and Kevin are mentioned in this episode but don't appear for the first time.
53	14	"Top 10 Stupid Moments"	Amy Wolfram	Tad Stones	March 15, 2010	314
A top 10 countdown of the stupidest moments in the series.
54	15	"Top 10 Car Stunts"	Sam Montes	Marsha Griffin	March 16, 2010	315
A top 10 countdown of the best cars in the series.
55	16	"Top 10 Omnitrix & Ultimate Aliens"	Adam Beechen	Scott Sonneborn	March 17, 2010	316
A top 10 countdown of Ben's best aliens in the series.
56	17	"Vendetta"	Rick Morales	Len Wein	March 19, 2010	317
A deadly criminal known as "Ragnarok" breaks out of the Null Void, and begins a search for a mysterious key. Meanwhile, Kevin returns home to find his house ransacked with his mom, who confesses the truth about Ragnarok. Kevin then asks Ben and Gwen if they know anything about Ragnarok, and when they tell him they don't. He tells them to stay out of the situation. The two, now concerned, ask Grandpa Max if he knows anything about the escape. He confesses to having a partner named Devin, who risked his life to stop Ragnarok several years ago. His partner's full name was none other than Devin Levin, Kevin's father. Ben and Gwen track Kevin with his Plumber's badge and together, they force Ragnarok to flee. Gwen then helps Kevin find the "key" which is revealed to be disguised as a picture frame of a younger Kevin and his father, but Ragnarok steals it, then teleports to his ship called "the Harvester".. Ben, Gwen, and Kevin manage to transport themselves via the same signal, but before they find Ragnarok, Kevin tricks the other two to get into an escape pod. With Ben and Gwen descending down to Earth, Kevin can now exact his vengeance without interference. He and Ragnarok battle, while Kevin causes the entire ship to destabilize into a vortex. Ragnarok begs Kevin to save him, stating that his father would too. Despite his desperation, Kevin merely takes his key and deliberately allows him to get sucked into the vortex. Ragnarok's ship explodes. Ben and Gwen see the explosion from the ground and think Kevin is dead but Ben turns around when he hears Kevin and they notice that he survived the explosion. Kevin then walks home after mentioning that Ragnarok is dead.
57	18	"The Final Battle, Part One"	Dan Riba	Dwayne McDuffie	March 26, 2010	318
Albedo steals the incomplete Ultimatrix (a new device which Azmuth is working on) from Azmuth's lab and completes it. He tries revert to his old form but he is not able to, for he needs the Omnitrix. Soon Vilgax proposes that the two of them should take revenge on Ben. Myaxx warns Azmuth of the Ultrimatrix's disappearance. Meanwhile, Ben is captured by an old enemy, Kraab. Gwen and Kevin, along with Ship, take flight to rescue Ben, while in the process destroys Kraab's ship, and rescuing Kraab as well. Later, Albedo defeats and captures Kevin (as Diamondhead) and Gwen (as Swampfire) and fails to defeat Max as Spidermonkey so runs away as Rath. Max goes to Ben's house and Albedo appears on his TV, blackmailing Ben to come to his friends' rescue. Albedo, as Humugousaur, turns into Ultimate Humungousaur, with the power of the Ultimatrix, and fights Ben as Humungosaur. Ben discovers that Albedo has been working in conjunction with Vilgax. In order to save his best friends', Ben gives up the Omnitrix to Vilgax. Omnitrix Alien Debuts: Bioids (official debut) Ultimatrix Alien Debuts: Ultimate Humungousaur (official debut)
58	19	"The Final Battle, Part Two"	Butch Lukic	Dwayne McDuffie	March 26, 2010	319
Max arrives and frees Ben and the gang and gives Gwen her old spell book which she uses to cast a teleportation spell that allows the gang to escape. Vilgax betrays Albedo, keeping the Omnitrix (against their deal) and uses it to turn his army of bioids into Humongousaurs. Albedo fights and defeats most of them as Ultimate Humongousaur but they eventually defeat him. Ashamed from what he recently did, Ben runs away into the forest where Gwen comes to help him but she is unable to as Ben is too depressed. Ben cries out Azmuth's name for help. Behind him, Azmuth reveals to Ben the secrets to the Ultimatrix and how to defeat Vilgax and Albedo. Powerless, Ben along with Gwen, Kevin, and Max, go aboard Vilgax's ship and faces off with Vilgax to stop his invasion of Earth. Ben sets the Omnitrix on self-destruct when Vilgax refuses to surrender it and eventually the Omnitrix self-destructs, which causes Kevin to return to his normal self. Ben then sets Albedo's Ultimatrix to self-destruct as well, but Albedo gives the Ultimatrix to Ben and shuts off the self-destruct. With the Omnitrix destroyed, Ben goes off and fights Vilgax with Swampfire from the Ultimatrix, but since Swampfire is too weak, he soon becomes Ultimate Swampfire and fights Vilgax while Gwen and Max take control of Vilgax's ship which is about to crash onto Earth. As the ship sinks underwater, Ben escapes Vilgax's true alien form, a giant octopus-like creature, and comes to surface as Jetray where Gwen, Kevin and Max are floating after the ship's fusion drive explodes, apparently with Ben still inside it. Ben appears shortly afterwards and the whole gang hugs. Kevin wondered if Vilgax is alive and if he will return, but Ben says, "If he ever does, it's hero time!". Ultimatrix Alien Debuts: Ultimate Swampfire (official debut)

DVD releases

Region 1 releases

DVD title	Season	Aspect ratio	Episode count	Time length	Release date
Ben 10: Alien Force Volume 1[1][2]	Season One	4:3[1]	5[1]	110 Minutes[2]	October 21, 2008[1][2]
Ben 10: Alien Force Volume 2[3][4]	Season One	4:3[3]	4[3]	88 Minutes[4]	January 13, 2009[3][4]
Ben 10: Alien Force Volume 3[5]	Season One	4:3[5]	4[5]	88 Minutes[5]	April 7, 2009[5]
Ben 10: Alien Force Volume 4[6]	Season Two	16:9[7]	5[6]	113 Minutes[7]	September 1, 2009[6]
Ben 10: Alien Force Volume 5[8]	Season Two	16:9[9]	4[8]	90 Minutes[9]	November 17, 2009[8]
Ben 10: Alien Force Volume 6[10]	Season Two	16:9[10]	4[10]	90 Minutes[10]	March 30, 2010[10]
Ben 10: Alien Force Volume 7[11]	Season Three	16:9[11]	7[11]	159 Minutes[11]	June 29, 2010[11]
Ben 10: Alien Force Volume 8[12]	Season Three	16:9[12]	6[12]	136 Minutes[12]	August 24, 2010[12]
Ben 10: Alien Force Volume 9[13]	Season Three	16:9[13]	7[13]	180 Minutes[13]	October 5, 2010[13]

Region 4 releases

DVD title	Season	Aspect ratio	Episode count	Time length	Release date
Ben 10: Alien Force – Season 1[14]	Season One	4:3[14]	13 [14]	286 Minutes	June 1, 2011 [14]
Ben 10: Alien Force – Season 2[15]	Season Two	4:3[15]	13	286 Minutes[15]	June 1, 2011
Ben 10: Alien Force – Season 3[16]	Season Three	4:3[16]	10[16]	220 Minutes	June 1, 2011[16]

See also

• List of Ben 10 episodes
• List of Ben 10: Ultimate Alien episodes
• List of Ben 10: Omniverse episodes

References

1. "Ben 10: Alien Force – Volume 1". Internet: tvshowsondvd.com. Retrieved 2010-02-13.
2. "Ben 10: Alien Force, Vol. 1 (2008)". Product Info. Amazon.com. Retrieved 2008-10-04.
3. "Ben 10: Alien Force – Volume 2". Product Info. tvshowsondvd.com. Retrieved 2010-02-13.
4. "Ben 10: Alien Force, Vol. 2 (2008)". Product Info. Amazon.com. Retrieved 2010-02-13.
5. "Ben 10: Alien Force – Volume 3". tvshowsondvd.com. Retrieved 2010-02-13.
6. "Ben 10: Alien Force – Volume 4". Product Info. tvshowsondvd.com. Retrieved 2010-02-13.
7. "Ben 10: Alien Force, Vol. 4". DVD back cover. Amazon.com. Retrieved 2010-02-13.
8. "Ben 10: Alien Force – Volume 5". Product Info. tvshowsondvd.com. Retrieved 2010-02-13.
9. "Ben 10: Alien Force, Vol. 5". DVD back cover. Amazon.com. Retrieved 2010-02-13.
10. "Ben 10: Alien Force – Volume 6". Product Info. tvshowsondvd.com. Retrieved 2010-02-13.
11. Lambert, David (2010-02-10). "Ben 10: Alien Force DVD news: Announcement for Ben 10: Alien Force – Volume 7". News (tvshowsondvd.com). Retrieved 2010-02-13.
12. Lambert, David (2010-05-13). "Ben 10: Alien Force DVD news: Announcement for Ben 10: Alien Force – Volume 8". News (tvshowsondvd.com). Retrieved 2010-05-13.
13. Lambert, David (2010-06-17). "Ben 10: Alien Force DVD news: Announcement for Ben 10: Alien Force – Volume 9". News (tvshowsondvd.com). Retrieved 2010-06-17.
14. "Ben 10: Alien Force – Vol. 1". Product Info. ezydvd.com.au. Retrieved 2010-02-13.
15. "Ben 10: Alien Force – Vol. 2". Product Info. ezydvd.com.au. Retrieved 2010-02-13.
16. "Ben 10: Alien Force – Vol. 3". Product Info. ezydvd.com.au. Retrieved 2010-02-13.

External links

• "Ben 10: Alien Force – Cartoon Network".
• Ben 10: Alien Force at the Internet Movie Database
• Ben 10: Alien Force at TV.com