Inside Man

The team rescues a young man named Tyler, who stole the Oscillator Key for the Highbreed's hyperspace gateway from Los Soledad. He crashes the truck and suffers memory loss as he escapes. After being almost captured by the DNAliens in a small town, the team saves him are forced to race the DNAliens to track down the device, resulting in a battle. The team is victorious, but they discover that Tyler is actually a DNAlien, having managed to resist the Xenocyte controlling him, and only looked human through the use of an ID Mask. More DNAliens arrive in a small tractor beam-equipped ship to reclaim the Oscillator Key, capturing Tyler during the struggle. Ben opts to save Tyler instead of retrieving the Oscillator Key, and uses the Omnitrix to restore him to human form. As the DNAliens escape, the four now know their plan and prepare to take action.

Ben Tennyson, Kevin Levin, Gwen Tennyson, Raff, Sevenseven, Bandaged Warrior, Serena, Attea, Emperor Milleous, Bellicus, Attendants, Warriors

Talk about multiple personalities.... It's been five years since Ben last used the Omnitrix, but when Grandpa Max disappears, Ben must go hero again! Ben Tennyson was your everyday, average kid until he discovered a mysterious watch hidden in a meteorite that crashed on Earth. He soon learned that the supernatural watch allows him to transform into 10 different alien beings while keeping his kid personality. Now 15 as he again dons the Omnitrix to battle new enemies, he morphs into new alien life forms and discovers different powers and abilities.