Numbuh 274 (Chad Dickson) was known as the best Kids Next Door operative, who rose through the ranks after
becoming famous for single-handedly defeating the Grown-up Gorilla Gang. He eventually became the Supreme Leader of the KND after Numbuh 100 was decommissioned, commanding the organization for five years and becoming Numbuh 1's mentor during his days at the KND Antarctic Academy. Numbuh 274 later defected to the Teen Ninjas when it was revealed he turned thirteen. Later it was revealed that he was an undercover KND operative.