Though Ben's team fails to stop the DNAlien Fleet from arriving, re-enforcements arrive, but this battle can't be won on Earth. A small group goes to the DNAlien home world to force its leaders to stop the invasion.

Paradox and Azmuth arrive with grave news: The DNAliens are ready to make their move. While Gwen and Kevin gather help, Azmuth reveals some secrets of the Omnitrix and its true purpose.

The team hears of a creature on nightly rampages in the desert and investigates. They find the creature, and some DNAliens.

Ben decides to help an arachnachimp on his lunar quest for a crystal.

Tyler, a man fighting against DNAlien programming, struggles to regain lost memories and convince local authorities of a hostile alien presence.

After Gwen receives an S.O.S. from Helen, Ben must go into the Null Void to save her and Manny. Once there, he must find The Wrench in order to stop D'Void, who happens to be Ben's old enemy Dr. Animo

When Ben's parents discover his ability to turn into aliens, they forbid him from using the Omnitrix and later ground him from using it again. Eventually Gwen is grounded too leaving Kevin to stop the DNAliens.

The Forever Knights develop a ship they will use to travel to the dragon's home world to destroy all dragons. To make it fully functional, they capture Ship, the alien Upgrade pet Ben and Julie met.

When the team turns to Cooper to get Kevin's transporter device working properly, they find their young friend has been abducted. Finding him leads to a well-hidden DNAlien base.

When Gwen demands that Kevin take her to her school's summer dance, Ben offers Kevin good advice. Meanwhile, Ben and Julie contend with a malfunctioning Omnitrix and a rogue Big Chill.

Following up on reports of Ben having nightly activities, Kevin and Gwen discover what might be described as Ben's evil twin.

During battle, Ben and a HighBreed commander are teleported to a distant world. They must put their differences aside if they're going to have any chance of finding a way to return to Earth.

The team is confronted by a Plumber Magister who accuses them of impersonating Plumbers. Meanwhile, a new foe allies himself with a HighBreed commander.