Codename: Kids Next Door is an American animated television series created by Tom Warburton for Cartoon Network, and the 13th of the network's Cartoon Cartoons. The series centers on the adventures of five children who operate from a high-tech tree house, fighting against adult and teen villains with advanced 2×4 technology. Using their codenames (Numbuh 1, Numbuh 2, Numbuh 3, Numbuh 4, and Numbuh 5), they are Sector V, part of a global organization called the Kids Next Door.
The series came about as the result of a viewer's poll by Cartoon Network. It ran from 2002 to 2008, with six seasons and 78 episodes.