The series is about a 10-year-old boy named Ben Tennyson who gets a watch-style alien device called the "Omnitrix".

The series gradually became popular and was nominated for two Emmy Awards, winning one for "Outstanding Individual Achievement in Animation".

[2][3] The series centers around Ben Tennyson (Tara Strong), a ten-year-old boy on a cross-country summer vacation, with his cousin Gwen (Meagan Smith) and their grandfather Max (Paul Eiding).

The device then permanently attaches itself to his wrist giving him the ability to transform into a variety of alien life-forms each with its own unique skills and powers.

The group worked on Ben 10's concept roughly 3 years before Cartoon Network picked up the series.

His concept work reveals that Ben Tennyson was originally going to be a red-headed young boy.

[7] The opening credits were altered in the third season and beyond to reflect that Ghostfreak was no longer to be used, and was replaced by Cannonbolt as the ninth alien.

Steven Blum voices Ben's alien transformations Heatblast and Ghostfreak, as well as the series' main villain Vilgax.

Dee Bradley Baker voices Ben's transformations Stinkfly, Eye Guy, and Wildmutt, Baker also voices Ben's school bully/friend Cash Murray, and many of his enemies such as The Limax, SixSix, Acid Breath, and the character Elsgood.

Richard Steven Horvitz voices Ben's Grey Matter transformation and the villain Sublimino.

"[8] A different version of Secrets of the Omnitrix, which introduced a different alien (Eye Guy) to the one in the original (Heatblast), aired on September 1, 2007.

It was stated during the premiere of Alien Force that Secret of the Omnitrix was intended to be the chronological finale of Ben 10, even though it was broadcast long before the last episode, which was not canon.

It revolves around Ben (Graham Phillips), Gwen (Haley Ramm) and Grandpa Max (Lee Majors) returning to their hometown of Bellwood and attempting to adjust to being ‘normal’ again.

Unfortunately, their lives are once again disrupted by a mysterious alien known as Eon (Christien Anholt), who has an unexpected connection to the Omnitrix.