The series follows the adventures of sixteen-year-old Ben Tennyson, wielder of the Omnitrix, an extremely powerful watch-style device that allows Ben to change into a multitude of various aliens; each with their own special abilities and skills. The storylines alternate between that of eleven-year-old Ben (one year after the original series) and sixteen-year-old Ben (a few months after Ben 10: Ultimate Alien). After Gwen leaves for college and Kevin leaves to be closer to her, Ben gets a new partner, a rookie by-the-book alien plumber named Rook Blonko (surname first). On a mission to explore a secret underground alien city named Undertown, Ben explores the quirkier side of things in the alien underground and discovers that enemies from his past are looking for a rematch.
s05e01Something Zombozo This Way Comes2014-02-1511:00⌄
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Something Zombozo This Way Comes
s05e01 ·
2014-02-15 ·
11:00
After two uneventful weeks, Ben is edgey and desperately hoping for something wrong to happen. He and Rook investigate a circus, which Ben decides to stay out of while Rook enjoys the show; however, he comes out looking like a clown, repeating "Come one, come all." Ben gets him to Plumber HQ, suspecting that Zombozo is up to his old tricks; however, Zombozo has escaped his cell and the number of zombie clowns is growing. Now Ben must try to overcome his fear of clowns so that he can save the people of Bellwood.
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s05e02Mystery, Incorporeal2014-02-2211:00⌄
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Mystery, Incorporeal
s05e02 ·
2014-02-22 ·
11:00
After Gwen as Lucky Girl beats Punchinello, Ben and Rook visit her and Kevin at college, but Darkstar (disguised as a student: Dante) gets revenge by using Charmcaster's rock monsters, and creates a cult in order to use Gwen to open up a portal to Ledgerdomain to absorb all the mana to become even powerful. Meanwhile Ben has some problems with the Omnitrix when it only wants to give him Ghostfreak.
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s05e03Bengeance is Mine2014-03-0111:00⌄
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Bengeance is Mine
s05e03 ·
2014-03-01 ·
11:00
Bill Gacks, an (actual) human plumber who resembles Vilgax (due to his beard), accidentally activates a weapon Vilgax set to attack Bellwood while fixing Pakmar's plumbing in Undertown. When Psyphon returns, he believes Bill is Vilgax, and, elated that his master has returned, pledges to help him in any way to destroy Bellwood. Meanwhile Ben and Rook try to stop Vilgax's squid monsters that the weapon accidentally released.
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s05e04An American Benwolf in London2014-03-0811:00⌄
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An American Benwolf in London
s05e04 ·
2014-03-08 ·
11:00
Ben's childhood crush, Kai Green, asks Ben and Rook for help when her grandfather is kidnapped by the Forever Knights who are after a mysterious sword all the way in London hidden in a secret room under the river. Could what the knights seek be King Arthur's mythical blade, Excalibur?
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s05e05Animo Crackers2014-03-1510:00⌄
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Animo Crackers
s05e05 ·
2014-03-15 ·
10:00
Dr. Animo from the Future return to go to the present to break Dr. Animo out of prison, and to steal something from the SACT so that they can populate and rule the Earth with Mutant Animals, and in order for Ben and Rook to stop him, they get assistance off someone from the future currently known as Chrono-Spanner.
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s05e06Rad Monster Party2014-03-2210:00⌄
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Rad Monster Party
s05e06 ·
2014-03-22 ·
10:00
As Ben, Rook, Rad, and Hobble fly through the Anur System to deliver something before they end up crashing into Anur Transyl, needing a device to power-up their engine. But as they walk through the planet, due to Anur Transyl being all but closed to the rest of the universe, the Halloweenish residents see Ben and his group as the monsters. But besides the angry mob and his friends being abducted by a Thep Khufan named Kupuhulu, Ben learns that Zs'Skayr (Ghostfreak's real name) has orchestrated the delivery to bring himself and the mentally restored Dr. Viktor back to their home system with revenge as an added bonus. Though his team got the upper hand, Ben ends up breaking the replacement device with them now stranded on Anur Transyl.
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s05e07Charmed, I'm sure2014-03-2910:00⌄
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Charmed, I'm sure
s05e07 ·
2014-03-29 ·
10:00
Still stranded on Anur Transyl, Ben suffers from a serious zit problem that grows worse with each time he uses the Omnitrix. At the same time, Charmcaster proposes an alliance to defeat Zs'Skayr, since he stole the Alpha Rune from her. Also, a female Trasylian alien named Viktoria develops a crush on Ben, due to his terrible acne.
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s05e08The Vampire Strikes Back2014-04-0510:00⌄
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The Vampire Strikes Back
s05e08 ·
2014-04-05 ·
10:00
Zs'Skayr and his allies awaken the great evil Lord Transyl, where he asks to make an alliance to rule the universe, but just as they team up, they manage to hypnotize everyone on Anur Transyl, and Ben's team. Now with Ben's newest alien Whampire, Ben and Hobble (the remaining people left) must discover a way to defeat Lord Transyl, save everyone, and must fix their ship in order to get back to Earth.
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s05e09Catfight2014-04-1210:00⌄
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Catfight
s05e09 ·
2014-04-12 ·
10:00
As Ben and Rook go on a double date with Ester (the Kraaho) and Rayona (Rook's girlfriend back home), they encounter Nyancy Chan, who places Ben (as Rath) under her trance and uses him in a crime spree. Meanwhile Princesses Looma and Attea are at odds about who will get to legally marry Ben's alien forms: Four Arms and Bullfrag.
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s05e10Collect This2014-04-1910:00⌄
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Collect This
s05e10 ·
2014-04-19 ·
10:00
Ben meets the ones responsible for his intergalactic TV show (mentioned back in "Bros in Space"), and the crew who makes this Ben 10 actor more famous than Ben himself, with Ben frustrated with this show on the air and taking his fame, Simian ends up hiring an alien collector known as Collectimus who turns things into training cards for his collection. He ends up taking Simian into his deck and in order to save the actor, and the Earth, Ben and Rook must take him down.
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