Ben 10: Alien Force - Season 1

Ben discovers that the Forever Knights are trading weapons with the DNAliens, while at the same time, Grandpa Max has mysteriously gone missing. He decides to return the Omnitrix on his wrist and go hero once again.

Ben, Gwen, and Kevin follow a lead that takes them to a secret base in the desert. There they hope to find Grandpa Max but instead find a Highbreed spaceship with a giant cannon.

A signal from Kevin's Plumber badge leads Ben's team to a cornfield where local police pursue a Pyronite-human hybrid they blame for crop circles and recent area fires.

While making repairs to the Rustbucket, Kevin steals it. He plans to use it as collateral for some other technology, but it gets stolen from him. Ben and Gwen go after Kevin.

Grandpa Max leaves Ben a series of instructions to contact a team of heroes. Things go the wrong direction when they soon find them.

Ken, Gwen's brother, stops in a small town for engine repairs and disappears. Grandpa Max arrives first to find him, Ben and the others soon after. They learn more about the alien conspiracy, and a heavy price will be paid to stop it.

Ben goes out on a date. All does not go as well as he'd like when objects start attacking him and he's forced to go hero to protect himself, all the while trying to keep his secret from his date.

When Ben and Gwen learn that their grandmother Verdona is an alien being, Verdona insists that Gwen should come along with her to her home planet and improve her abilities. With this, Gwen is faced with a difficult decision between a human and alien life.

When Ben stands up to Cash and JT, they soon discover a robotic gauntlet from Kevin's vehicle. With it, Cash decides to get back on Ben, although this time, it's more than just a joke.

A time experiment in the 1950s sends a bizarre monster to Ben's time. Now Ben, Gwen, and Kevin must team up with Paradox, a time traveling hero, to face off against the unstoppable creature.

A dragon escapes from the Forever Knights, and they ask Ben for help tracking down/killing the beast. The team learns why the Knights were formed. The hunt for the dragon reveals other surprises.

Two Plumber offspring are taking down all aliens. Now they have their sites set on Ben's team, forcing the team to fight two of Ben's old alien forms - Four Arms and XLR8.

When an alien emperor deems to destroy Earth due to the disappearance of his daughter, Ben must use Alien X to restore order, but not everything goes according to plan.