Ben 10 Alien Force

Five years after the events of the original series, 15-year old Ben Tennyson has returned to a normal life. But the mysterious disappearance of Grandpa Max prompts him to wear the Omnitrix, as well as forcing Ben, Gwen, and Kevin Levin to search and locate him. While at the same time, enlisting the help of child Plumbers and repelling attacks from a new foe, the Highbreed.