The series premiered on Cartoon Network on April 18, 2008 in the United States, with its Canadian premiere on Teletoon on September 6, 2008 and ended on March 26, 2010. The series was originally produced under the working title of Ben 10: Hero Generation. The series ran for a total of 46 episodes with its final episode being aired on March 26, 2010. The third installment of the series titled Ben 10: Ultimate Alien premiered on April 23, 2010. Reruns are shown on Cartoon Network and Boomerang.