Ben 10: Ultimate Alien is an American animated television series – the third entry in Cartoon Network's Ben 10 franchise created by team Man of Action (a group consisting of Duncan Rouleau, Joe Casey, Joe Kelly, and Steven T. Seagle), and produced by Cartoon Network Studios.
It was slated to premiere after the series finale of Ben 10: Alien Force on March 26, 2010, but actually premiered on April 23, 2010, in the US and in the UK.
In India and Latin America, it premiered on October 10, 2010.
In Canada, the series started airing on September 12, 2010, on Teletoon.
The series finale finished on March 31, 2012 with the two-part episode, The Ultimate Enemy, being in memory of series developer and producer Dwayne McDuffie, who died during the production of the series.