List of villains in Codename: Kids Next Door

The KND says Father is their biggest enemy. But it's discovered in Operation Z.E.R.O. that Father"s actually Numbuh 1's uncle.

Numbuh 0 aka Numbuh 1's dad is brother to Father aka Bennadict. It is also revealed that since Grandfather is Father's and Numbuh 0's father he is also Numbuh 1's grandfather. Also, since the Delightful Children From Down The Lane (DCFDTL) are Father's children they are Numbuh 1's cousins.