Ben 10 - Season 4 (2007)

Ben, Gwen and Max attend a family wedding in which there is much more than meets the eye.

The Tennysons find themselves facing off against a group of highway pirates who have hijacked the Rustbucket.

To replace Gwen's new laptop, Ben enters a pro-wrestling tournament for its prize money but encounters two competitors with problems greater than his own.

Ben's son, Ken, turns ten. As a birthday gift, Ben gives Ken an Omnitrix, with ten aliens. Ken soon befriends Devlin, a youth with some ties to an archenemy of Ben's.

The Tennysons investigate the theft of Plumber technology seemingly committed by foes from Ben's past.

With Negative 10 after the Sub-energy, the Tennysons and Cooper make a final stand at Mount Rushmore to keep them from getting it and taking over the world.

The summer finally ends. Ben and Gwen have to go back to their normal lives. Grandpa Max tells Ben to keep the Omnitrix a secret from everyone, even his parents. Ben agrees, but Vilgax arrives and he'll stop at nothing to get the Omnitrix.

Ben and Tetrax are taking the Omnitrix to Azmuth when they run into Vilgax and his army of drones.

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While under fire, Azmuth reattaches the dial which not only reactivates the Omnitrix, but also unlocks and transforms Ben into a To'kustar, an extremely powerful transformation he names Way Big.