Ben 10: Ultimate Alien - Season 2 (2011)

Jimmy investigates a possible alien sighting. But with no solid evidence, few believe him. As Ben starts acting strangely, the others suspect Jimmy may be right.

Cousin Sunny is supposed to stay with Gwen for the summer. The team learns why her parents sent their child to Gwen when she helps them stop a robot invasion.

Ben is attacked by Victor Validus. The team soon discovers that Validus passed away. The team turns to Ben's friend, Elena, for help to locate the Nanite Queen.

The Forever Knights open an ancient vault hoping to find weapons. They unwittingly release a creature.

The team is required to attend Plumbers Academy to keep their badges.

Gwen Tennyson has a busy schedule. Balancing her family life, school, a friend's recital, and the latest plot by Dr. Animo.

20 years in the future, Eon attacks Ben 10,000, then disappears. Adult Ben travels back in time fearing Eon will attack his younger self, the present day Ben.

Grandpa Max tells the team about his first UFO encounter, which led him to meet Verdona.

After a base is attacked, Max is infuriated when they learn it was a secret alien prison facility. While Max argues with the officer in charge, the team tries to locate an escaped prisoner.