Ben, after Gwen leaves for college, and Kevin goes with her, now uses the 3rd generation of the Omnitrix and travels in galaxies with his new partner, Rook, and makes new friends and enemies.
||Title for the Episode
||The More Things Change, Part 1
||August 1, 2012
||Kevin and Gwen leave, when Gwen takes early enrollment in an Ivy League college, and Kevin moves to be with her. Ben is forced to fight crime alone but Grandpa Max (Magister Tennyson- the commander of the Earth-base's Plumbers) gives him a new partner, rookie Plumber Rook Blonko. The first episode introduces Khyber hunting Ben with his pet 'dog', equipped with a 'Nemetrix' that turns it into the Predatory species of Ben's alien forms. Ben and Rook end up in their first team-up when Mr. Baumann's store is targeted for destruction by 3 alien criminals named Bubble Helmet, Fistina, and Liam as part of their protection racket.
||The More Things Change, Part 2
||September 22, 2012
||After stopping Bubble Helmet, Fistina, and Liam from blowing up Mr. Baumann's superstore, Ben and Rook discover an underground alien city named Undertown where they discover that Psyphon is behind the protection racket. At the same time, Khyber sends his pet in the form of Buglizard to hunt Ben.
||A Jolt from the Past
||September 29, 2012
||The Megawhatts that Ben fought in his youth come back. This time, they need Ben's help when they are being used as a power source for the villain Fistrick.
||So Long, and Thanks for All the Smoothies
||October 27, 2012
||When Ben and Rook investigate a mysterious alien ghost ship, they discover that Argit and the Vreedle Brothers are fighting for possession of a doomsday device.
||It Was Them
||October 20, 2012
||Ben and Rook must stop Dr. Animo and his herd of ants.
||October 6, 2012
||Infiltrating the Plumbers' base, Khyber uploads footage of young Ben's encounter with a corrupted Mechomorph named Malware.
||November 3, 2012
||Ben and Rook come across elastic hot-blooded aliens called the Kraaho who plan to activate a volcano with a fusion engine destroying the town of Bellwood in the process.
||Have I Got a Deal for You
||october 13, 2012
||Ben must recapture an endangered alien causing havoc. but an alien acitvst wants to save it.
||Of Predators and Prey, Part 1
||November 10, 2012
||As a flashback to the episode "The More Things Change" (Part 1), it is revealed that during a fight with Eleven-Year Old Ben Tennyson, Malware touched the Omnitrix symbol on Four Arms. After the battle, he went to Dr. Psychobos and made him create a prototype Omnitrix, the Nemetrix. Back in the present, after a heated argument, Ben and Rook go their separate ways, giving Khyber his best chance to capture Ben. After a long battle, Ben is forcibly changed back into his human form and falls unconscious. A victorious Khyber intends to take Ben to his employer.
||Of Predators and Prey, Part 2
||November 17, 2012
||While trapped in Khyber's ship Khyber's tells Ben that he needs different alien DNA to complete the evil incomplete version the Nemetrix he also reveals that Dr.Psychobos assigned him to hunt down various species for DNA to transfer it to the Nemetrix and also tells Ben that the reason Dr.Psychobos is creating an evil Omnitrix is becuase much to Ben's horror ,Malware.After Ben breaks free a brawl breaks out leaving Khyber the victor just when it seems Ben is finished Rook breaks in and saves Ben the duo then reveals to Khyber that they orchestrated the whole "fight" at Undertown and Ben only let Khyber capture him so he can lead them to his ship after a long fight Ben and Rook accidentaly crash Khyber's ship eleminating the DNA to complete the Nemetrix making Dr.Psychobos and Malware furious.
||Title for the Episode
||Many Happy Returns
||December 1, 2012
||Gwen and Kevin visit Bellwood during spring break, but the latter has an additional reason to visit as he needs Ben to hide him from a Tetramand Princess named Looma who intends to marry Kevin as part of a ritualistic courtship he entered for the wrong reasons. Things worsen when Looma's father, Warlord Gar, holds the world hostage to make sure his daughter is married.
||December 8, 2012
||Magister Patelliday is kidnapped by pirates who rob ships and put them in giant glass bottles to sell them. They intend to devour Patelliday. Any attempts at rescue are hard, since they have a Krakken and a robot army.
||November 24, 2012
||A part is stolen from the Omnitrix by Dr. Psycobos causing it to malfunction. The malfunctioning of the Omnitrix causes it's powers to leak into Psyphon, Bubblehead, Fistina, and Liam giving them powers similar to the Omnitrix aliens.
||Blukic and Driba go to Mr. Smoothy's
||December 15, 2012
||Ben and Rook must stop Trumbipulor from gaining absolute power while Blukic and Driba set out to find Mr. Smoothy's.
||December 22, 2012
||Ben and Rook are attacked by Khyber at a festival.
||Bros in Space
||January 12, 2013
||Ben and Rook visit Rook's family while Revohnnah is attacked by an old foe.
||January 5, 2013
||Ben and Rook got turned into kids.
||Rules of Engagement
||March 23, 2013
||Looma attacks Ester's village, forcing Ben, Rook, and Julie after capturing Fistina to stop her.
||Showdown: Part 1
||February 9, 2014
||The Faction infiltrates Galvan.
||Showdown: Part 2
||February 16, 2013
||Ben must deal with a past failure; a deranged Malware launches his final attack.
||Title for the Episode
||October 5, 2013
||chupchubras creatures attack Bellwood.
||February 23, 2013
||When an Incursian raid kidnaps The Gourmand Queen, Rook and Ben must work together to save her and stop the Incursian invasion, only the heroes end up following different paths in search of a solution, with each one going to each sub-species of Upchuck's kind, the Perks and the Merks.
||January 26, 2013
||Following Ben helping Grandpa Max defeat Liam, Ben takes Blukic and Driba to look for the 23rd Mr. Smoothy restaurant. After Ben, Blukic, and Driba enter the 23rd Mr. Smoothy restaurant that keeps disappearing, they find it run by Professor Blarney T. Hokestar who is using a dimensional device to move the restaurant to different dimensions. In one dimension, Ben meets an alternate version of himself who names his aliens differently and has lost his Grandpa Max.
||Vilgax Must Croak
||March 2, 2013
||Ben and Rook have to escort Vilgax to a maximum-security prison planet, and defend Earth against the Incursion armada.
||January 19, 2013
||Eon returns and switches Ben's mind with his younger self as part of a plot to take over the timelines. It's up to Paradox to help the Bens' regain their rightful minds and help to defeat Eon.
||February 2, 2013
||As payment for destroying his car, Mr. Bowman orders Ben to make deliveries for him without using the Omnitrix.
||March 30, 2013
||With Plumber agents trapped in Incursean territory, Ben and Rook must employ the services of Rad Dudesman, the roughest, toughest smuggler in the galaxy.
||While You Were Away
||March 9, 2013
||Dr. Psychobos and Princess Attea lead an invasion of Rook's home planet.
||The Frogs of War: Part 1
||March 16, 2013
||Incurseans take control of Earth, so Rook and the Plumbers must stop them, while Ben is somehow missing.
||The Frogs of War: Part 2
||March 16, 2013
||Ben, Rook, Gwen and Kevin must find a solution to stop the Incurseans once and for all.
||Title for the Episode
||Food Around the Corner
||October 12, 2013
||Ben as Gravattack attempts to moderate a fragile peace treaty, but must endure the attacks of tiny alien fleas, which have inhabited his body.
||The Ultimate Heist
||November 16, 2013
||Albedo seeks a device that will finally change him back into his Galvan form; meanwhile, Ben is locked in Plumber HQ prison.
||Oh Mother Where Art Thou
||October 19, 2013
||Ma Vreedle threatens to blow up the sun if Ben and the Plumbers don't find her missing son!
||December 7, 2013
||Grandpa Max doesen't want to be involved with Verdona, but when things happen with the seperated couple, Carl and Frank, Ben, Rook and Gwen might have to be involved.
||April 6, 2013
||Dr. Animo remembers the time he had taken control of the Plumber Headquarters inside Mount Rushmore with bugs that easily hack computer codes, planning to mutate everyone on Earth into grotesque, monstrous creatures resembling him.
||Return to Forever
||October 26, 2013
||The Forever Knights return with a queen to seek vengeance against Ben for Sir George's death and honor.
||Mud is Thicker than Water
||November 2, 2013
||Ben, Gwen and Cousin Lucy try to find out how Psyphon's thugs are getting Plumber technology.
||November 9, 2013
||Kevin and Rook run into an old enemy from the Null Void while attending an intergalactic auto show.
||A Fistful of Brains
||November 23, 2013
||Grandpa Max and Rook are looking all over the galaxy for Ben who is trapped on Khyber's hidden personal hunting preserve.
||For a Few Brains More
||December 30, 2013
||Ben, Rook and Max must stop Ultimate Albedo from absorbing Azmuth's intelligence and taking over the galaxy.
||Title for the Episode
||Something Zombozo This Way Comes
||February 15, 2014
||Ben and Rook must stop Zombozo and the Circus Freaks from turning everyone in Bellwood into zombie clowns!
||February 22, 2014
||An old enemy emerges while Ben and Rook visit Kevin and Gwen at college.
||Bengeance is mine
||March 1, 2014
||Vilgax's former lackey Psyphon is elated when his master returns.
||An American Benwolf in London
||March 8, 2014
||Ben and Rook are called to London England to investigate the Forever Knights' latest activities.
||March 15, 2014
||Dr. Animo from the future comes back to the present to help himself defeat Ben once and for all.
||Rad Monster Party
||March 22, 2014
||Ben and Rook enlist the help of intergalactic smuggler Rad Dudesman to fly them through the Anur System—the home of the monstrous aliens!
||Charmed, I'm Sure
||March 29, 2014
||Still stranded on the monster planet Anur Transyl, Ben and Rook reluctantly team up with the help of Charmcaster to take on Zs'Skayr.
||The Vampire Strikes Back
||April 5, 2014
||Ben, Rook, and Rad Dudesman come face to face with the evil Lord Transyl, a vampire-like alien who can make anyone his loyal slave!
||And Then There Were None
||April 12, 2014
||Vilgax and Eon team up to wipe out every Ben in every dimension!
||And Then There Was Ben
||April 19, 2014
||Professor Paradox unites the good Bens from across all dimensions to take on Vilgax, Eon, and the evil Bens in the ultimate showdown!
||Title for the Episode
||October 4, 2014
||The princesses Looma and Attea are at odds over who gets to marry Ben!
||October 11, 2014
||Ben finally meets the ones responsible for his intergalactic TV show, and the actor who makes Ben 10 more famous than Ben himself!
||October 18, 2014
||Billy Billions, Kangaroo Kommando, and Captain Nemesis team up to take down Ben, and claim his place as protector of Bellwood?!?
||Cough it Up
||October 25, 2014
||Psyphon and a gang of bounty hunters are after Argit, who is in possession of a dangerous weapon!
||The Rooters of Evil
||November 1, 2014
||Meet the Rooters, the Black Ops wing of the Plumbers from the Null Void. They've come looking for someone close to Ben, and they mean business
||Blukic and Driba Go to Area 51
||November 8, 2014
||A mysterious Galvan arrives and demands Blukic and Driba to give back a super powerful weapon needed to stop a threat to Earth.
||No Honor Among Bros
||November 15, 2014
||Rook is under the influence of Fistrick's "bro" essence and starts to act like a bro. Can he and Ben infiltrate an alien fight club to claim the Golden Fist?
||Universe vs Tennyson
||November 22, 2014
||Ben gets dragged into intergalactic court by the other Celestialsapiens (Alien Xs) for recreating the universe (back in "So Long and Thanks for All the Smoothies").
||Weapon XI: Part 1
||November 29, 2014
||Kevin and Argit attempt to warn the amalgam kids about the Rooters intentions meanwhile Ben, Rook, and Gwen set off to find Kevin and land themselves in the Null Void!
||Weapon XI: Part 2
||December 6, 2014
||The Rooters have seemingly turned Kevin and the Amalgam kids against Ben. Can Rook and Gwen help him overcome the opposition and escape the Null Void?
||February 14, 2015
||Ben meets Clyde, who received his Omnitrix when he was 5 years old, when Vilgax was also searching for that Omnitrix.
||February 21, 2015
||Ben and Rook have to deal with a still-mutated Kevin after his revelation and exile from the Plumbers in "Weapon: XI", while a depressed and heart-broken Gwen is working alone in college.
||February 28, 2015
||Charmcaster attacks the Plumbers' academy searching for something, while Alan, Helen, Manny, Lucy and Tack attempt to fight back.
||The Ballad of Mr. Baumann
||March 7, 2015
||Mr. Baumann is trying to write a ballad, when Ben and Rook are becoming distractions, and Vulkanus taunting Baumann.
||Fight at the Museum
||March 14, 2015
||When Ben's own museum arrives, Charmcaster brings all of the exhibits to life to attack him.
||March 21, 2015
||Ben and Rook attempt to find out who gave Kevin the opportunity to build the Robot Gwen. Is it Animo, Aggregor, Vilgax, Albedo, Charmcaster, Zombozo or anyone Ben knows?
||Argit and Simian
||March 28, 2015
||Argit and Simian become partners in crime when they start looking for a device that will make them both rich.
||April 4, 2015
||The Vreedles' home planet is threatened when the cloning machine malfunctions and led a massive clone army which could destroy the army.
||It's a Mad...Ben World: Part 1
||April 11, 2015
||Gwen, Rook and Max find something different about Ben, when he is muscle bound and arrogant and starts making an arrangement of Hex being the mayor. Meanwhile, the Real Ben has been trapped for 5 months in the Ledgerdomain.
||It's a Mad...Ben World: Part 2
||April 18, 2015
||Ben assembles Albedo, Clyde and 3 young misfits (Bobby, an african american boy, who believes Ben didn't serve Hex, and he is considered an idiot, Caroline, a pale-skinned girl who sees the universe and can read minds, but is considered a freak and Sally, a popular girl who never gets any attention) must use their newfound Omnitrixes to battle Hex and take back Bellwood.
||Endgame: Part 1
||In the first part of the series finale, the Robot Gwen's legacy is preserved, and the villains blame Ben for his stupidity, as Ben himself decides to be the one to fix the mess he left out by heading back into time where he and Kevin fought against Slix Vigma in Grudge Match, by getting Gwen and Grandpa Max to help save them.
||Endgame: Part 2
||When Past and Present Ben, Gwen, Max and Technorg keep guard of Kevin on why he is doing this, he reveals his deal with Frank Tennyson.
||Endgame: Part 3
||In the third part of the series finale, Ben teams up with Ash Ketchum, Optimus Prime and other characters from the Dragon markings to Face Galaction and Inorcat.