* Numbuh 1: Nigel Uno (the leader)
* Numbuh 2: Hoagie P. Gilligan (the brains)
* Numbuh 3: Kuki Sanban (the tech wiz)
* Numbuh 4: Wallabee "Wally" Beatles (the muscle)
* Numbuh 5: Abigail "Abby" Lincoln (the spy)
There are also many other Kids Next Door characters that appear throughout the series.