As the KND organization is quickly overrun, Numbuh 1 (Nigel Uno) embarks on a desperate mission to find the legendary hero, , the only operative believed to have the power to defeat Grandfather. Key Revelations and Twists
: In a major series twist, Numbuh 0 is revealed to be Nigel’s father, Monty Uno . Codename: Kids Next Door - Operation Z.E.R.O.
: The film establishes that Father (Benedict Uno) is actually Nigel’s uncle, making Grandfather Nigel's grandfather. As the KND organization is quickly overrun, Numbuh