Ben 10: Alien Force
About the show:
Ben 10 Alien Force takes place five years after the original Ben 10 series. Ben Tennyson is now a normal, well-adjusted teenager who long ago put away the Omnitrix that gave him his powers. His adventures as a shape-shifting hero are little more than fond memories.
Shortly after successfully defeating the alien menace of Vilgax, Ben learned how to remove the watch, and he hasn't needed its powers since. The last thing on his mind was getting involved in another series of adventures - but that was before he discovers his Grandpa Max is missing.
When Ben goes to visit Grandpa Max, he discovers a bizarre alien searching the Rust Bucket, the old RV that houses a secret scientific laboratory. Without his powers, Ben manages to drive the creature off, but there's no sign of Max - only a cryptic holographic message from him claiming that he has the Omnitrix. Ben knows something is amiss, as he thought he had the Omnitrix.
Ben discovers the Omnitrix exactly where he left it four summers ago, and he rushes to tell his cousin, Gwen. Ben decides to put the Omnitrix back on and investigate why his Grandpa Max is missing. Ben doesn't realize that putting on the Omnitrix transforms it, revealing a previously hidden component: There are 10 all-new alien forms now available to him.
The cousins quickly begin investigating the mystery and discover planet Earth is once again the center of alien activity in the galaxy. A new alien race, the DNAliens, is secretly plotting to destroy not only all life on Earth, but all life throughout the galaxy.
Ben and Gwen are joined in their adventures by Ben's old enemy,
Kevin Levin. Kevin has recently escaped from the extradimensional
prison, the Null Void. Kevin will travel with Ben and Gwen, helping
them for his own reasons, but sometimes scheming on the side.
Together the three young superheroes join forces with other young
heroes to save the galaxy and Grandpa Max.