After defeating the FOREVER KNIGHTS, Ben, Gwen, and Kevin follow a lead that takes them to a secret base in the desert. There they hope to find their missing Grandpa but instead find a spaceship with a giant cannon.\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
