Ben 10: Alien Force (2008)

Episode Overview

When Kevin arrives home, he's shocked to discover his house has been turned upside down. Determined to uncover the culprit, he reaches out to Ben and Gwen for assistance. Their investigation leads them to Ragnarok, a dangerous criminal recently escaped from the Null Void, who is on the hunt for a unique key. As Kevin races against time to prevent Ragnarok from getting his hands on the key, he uncovers unsettling details about Ragnarok's connection to his father.