Season 01
Season 02
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.
All Episodes - S02
EPS01
The team's camping break is interrupted when a pod crashes nearby. The occupant has no memory who she is or where she came from. Sunder soon arrives to retrieve her.
EPS02
Ship runs away to help Baz-El. Julie turns to Ben for help, but after their break up, he's reluctant. Gwen and Kevin accompany Julie on her quest.
EPS03
The King of Zarkovia asks the team for help with a civil war. The team agrees to help when they find out Dr. Viktor may be involved.
EPS04
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.
EPS05
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.
EPS06
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.
EPS07
The Forever Knights open an ancient vault hoping to find weapons. They unwittingly release a creature.
EPS08
The team is required to attend Plumbers Academy to keep their badges.
EPS09
Gwen Tennyson has a busy schedule. Balancing her family life, school, a friend's recital, and the latest plot by Dr. Animo.
EPS10
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.
EPS11
Grandpa Max tells the team about his first UFO encounter, which led him to meet Verdona.
EPS12
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.