Vilgax and Albedo return and team up to kidnap Kevin and Gwen so that they can take down Ben.

Kevin decides to settle old scores with an escaped con.

The Plumbers’ Helpers travel to a Plumber station to rescue Max from an insane, rampaging Ben.

A sick Ben is happy to see an old friend Tetrax but finds out he has plans of his own.

Gwen goes back in time to stop the Omnitrix experiment from ever happening while causing disasters in the present time.

Ben and the gang get transported by the Omnitrix to a strange new planet where they encounter Vilgax.

The Omnitrix malfunctions, turning Ben into a ruthless and aggressive alien while on an intergalactic peace mission.

Ben and the gang battle an alien’s toy which proves to be very dangerous.

Kevin teams up with Darkstar to retrieve an artifact that could cure both of them.

Vilgax asks for Ben’s help to take down Zs’Skayr who has taken over his planet.

Charmcaster returns and gets Kevin to help her to defeat Gwen.

Ben and the team have to thwart a Highbreed failsafe, which gets accidentally set off.

A bounty hunter who’s after the Omnitrix sends Ben to the Null Void, but his left hand remains on Earth.

Ben and Kevin try to thwart repo-men sent to return Ship to his maker and appeal to a judge to rescind his ruling.

Ben and the team travel to an alien planet to resolve a conflict between the inhabitants. Kevin finds that Argit has been selling the weapons from one side to the other after painting them a different color. A temporary truce occurs, but as Ben attempts to shake hands with the leaders of each side, one […]

An alien asks Ben to help locate his missing best friend.

Ben, Gwen, and Kevin discover that Vulkanus is planning to drill to the Earth’s center.

Vilgax begins by winning a Conqueror’s Challenge and drains the powers of the champion who he defeats. He then heads to Earth in an attempt to get revenge on Ben. Meanwhile, Ben is seen acting more arrogant as he receives another medal for saving the universe, and is shown to have received many of them. […]

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. The trio is then surrounded by a group of DNAliens, but are saved by Grandpa Max, […]

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 […]

An Arachnichimp (Spidermonkey’s race), Simian, needs help in retrieving a crystal which is supposedly the symbol of the monarchy on his planet. Ben offers his help, but Kevin and Gwen are skeptical. In the midst of the battle, Ben discovers that Simian has been lying, and that the crystal is actually powering an intergalactic communications […]

The team rescues a young man named Tyler, who stole the Oscillator Key for the Highbreed’s hyperspace gateway from Los Soledad. He crashed the truck and suffered memory loss as he escaped. After being almost captured by the DNAliens in a small town, the team saves him and are forced to race the DNAliens to […]

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 Dr. Animo, who has […]

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 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 […]