Ben 10 is an American animated series created by the group Man of Action and produced by Cartoon Network Studios. The pilot episode And Then There Were 10, aired on December 27, 2005, as part of a sneak peek of Cartoon Network's Saturday morning lineup.
Ten-year-old Ben Tennyson, his ten-year-old paternal first-cousin Gwen, and their paternal Grandpa Max start their summer camping trip. Ben goes stomping off into the woods after another fight with Gwen, whom he is not happy to have along on the trip, and finds an alien pod on the ground. When he examines it, he finds a mysterious, watch-like device, called the Omnitrix. The device attaches permanently to his wrist and gives him the ability to transform into a numerous variety of alien life-forms, each with their own unique powers and abilities. Although Ben realizes that he has a responsibility to help and save others with these new abilities at his disposal, he is not above a little ten-year-old super-powered mischief now and then. Along with Gwen and Max, Ben embarks on an adventure to fight evil, both extraterrestrial and earthly. Ben has faced lots of villains including villains fighting together in a team or a partner once Vilgax and Kevin 11 fought Ben.
The theme song of Ben 10 was sung by Moxy. In the First and Second Season Ghostfreak was the ninth alien in the theme song. Cannonbolt replaced Ghostfreak as the ninth alien in the Third and Fourth Season.
Steven E. Gordon worked on a very early version of the show, his concept work reveals that Ben Tennyson was originally going to be a red headed young boy. Gordon also has early designs of the Omnitrix which look more like a watch than the final version, as well different designs and names for the alien transformations.
Recurring lines in the series are: "Oh man!" and "It's hero time!".
In Norway, Sweden and Denmark, episode 22 and 23, 24 and 25, and 27 and 28 switched places.
In the latest reruns, the theme song has been shortened (except, for some reason, in the episodes The Negative 10: Part 1 and 2). The current airings on Boomerang have now gone back to the original theme song's length.
In Poland, episodes 52, 51 and 50 were switched in airing.
In Heroes United, Rex makes his own theme song similar to the Ben 10 theme song.