Gwen and Ben find themselves abducted into the future in order to help their future selves with a problem, but Dr. Animo keeps them busy by reanimating Vilgax.
The sorceress Charmcaster wreaks magical mayhem in Salem, Massachusetts. She wants the Omnitrix and to get it she attempts to switch bodies with Ben but winds up with Gwen's instead.
While traveling through Death Valley, the Tennysons come across a winterland anomaly, where Grandpa Max is forced to become Santa Claus and the kids start becoming elves.
Ben runs across his little league team as they face in a playoff against a team of robots in juvenile disguise targeting the President of the United States.
When an old friend from Grandpa Max's plumber day past appears, Ben despises not being the center of attention anymore, but then an old threat returns.