Gwens older brother, KEN, disappears and she gets Ben and Kevin to help her track him down. Their investigation leads them to find not only Ken, but also another long-missing relative, and a startling secret of the DNAliens. This discovery comes at a high cost as Ben is left with greater responsibilities than ever before.\r Watch more Ben 10: Alien Force on Cartoon Network!\r \r Watch more videos and play Ben 10 Alien Force games: \r \r Check out our Cartoon Network Facebook pages:\r \r
