One year after the events of Ben 10: Alien Swarm, Victor Validus attacks Ben at night but when he defends himself, he finds a Nanochip that was believed to have been destroyed along with its queen. Ben, Kevin and Gwen find Victor’s daughter, Elena who was once Ben’s middle school sweetheart, to see what is […]

Techadon Weapon Master Number 13 arrives on Earth and demands to have the Ultimatrix. A malfunction grants Gwen and Kevin the forms and unique abilities of some of Ben’s aliens.

As Ben laments that things can’t get worse, Aggregor shows up to recapture Ra’ad. The gang try to fight Aggregor, but he proves to be too strong for them. The Ultimatrix finally lets Ben transform, but unfortunately, all that he can transform into is an Amperi. With no choice, Ben transforms into AmpFibian and fights […]

Baz-El is on a distant planet where he is stealing some valuable gems from some temple statues. Later, the temple guardian worshippers attack Baz-El. Ship suddenly hears Baz-El’s cries for help, and leaves Julie to help his old owner. Julie ask Ben for help to locate Ship, who left to help Baz-El. However, their break-up […]

Julie is playing her first big game, while the Forever Knights are trying to break into a museum. Ben also wants to go see the opening of a new Sumo Slammers movie. To deal with his dilemma, he transforms into Echo Echo and then changes back to human, creating three copies of himself with differing […]

Ben, Gwen, and Kevin are summoned to Plumbers Academy to go under training. They create a good friendship with an alien named Tack and Ben dislikes the drill instructor, Magister Hulca, that is being targeted for revenge by a menacing Tetramand.

Azmuth reveals in his memories how Old Sir George had acquired the great and mighty sword of Ascalon, and how he had sealed Diagon the first time millennia ago. In addition, he reveals the real reasons for his eventual creation of the Omnitrix and Ultimatrix.

Gwen must juggle things around, in which she has to help Ben and Kevin recapture Dr. Animo, fill out invitations for her mother Natalie’s family reunion, help Kevin get into school, finish exams, and go to her best friend Emily’s piano performance.

Following a visit from Paradox after a fight with Eon, Ben 10,000 from an alternate future arrives twenty years from the future to seek the aid of his past counterpart in tracking down Eon. It is revealed that Eon is actually an adult Ben from an alternate world, and that he wants to destroy all […]

Movie star Jennifer Nocturn appears to be in danger, but before Captain Nemesis can act, Ben interferes and saves the day. Jealous, Nemesis stages a competition against Ben, which he loses. Nemesis then kidnaps Julie, who was shown taking her anger over Jennifer out on the tennis courts. Nemesis then intercepts Jennifer’s helicopter. When Ben […]

The team goes to Gwen’s house to find a solution to defeat Computron’s minions from Dimension 12. When they go to Gwen’s room, they find a dark-hair girl, who is Sunny, Gwen’s cousin. Gwen’s mom insists they take Sunny with them. The team takes Sunny to the mission but they left her in Kevin’s car. […]

The Forever Knights discuss their plan for the weapon and Ben and the team come in to fight with Cash, J.T., and Oliver filming the scene. Kevin gets angry with them not helping and Psyphon comes in to destroy Cash and J.T., believing them to be the masterminds behind Ben Tennyson.

A strange alien is offering big money (over $1 million) to someone who can open a safe (which is really a containment suit). That alien is revealed to be P’andor, who wants to be free of his suit. Eventually, Kevin accidentally releases P’andor in his radioactive form, whom Ben, Gwen, and Kevin have to stop.

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 […]

Ma Vreedle plans to spawn an army of Pretty Boy Vreedle clones, which could dry up Earth’s oceans.

Simian accidentally unleashes a Xenocyte Queen which orchestrates an invasion of the Arachnichimps’ planet. When Eunice goes missing, Ben, Gwen, and Kevin end up helping Simian liberate the Arachnichimps’ planet from a DNAlien version of the Arachnichimp Mizaru.