Codename: Kids Next Door - Operation Z.e.r.o. -

is a feature-length made-for-TV movie that serves as a pivotal turning point in the lore of the Codename: Kids Next Door series . Originally aired on Cartoon Network on August 11, 2006, the film explores the origins of the organization and introduces its most formidable threat to date. Plot Overview: The Return of the Ultimate Evil

: 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 story centers on the resurrection of , a reality-warping tyrant who once ruled the world when today's villains were merely children. After being reawakened by his son, Father , Grandfather begins transforming the world's population into "Senior Citi-zombies"—obedient slaves forced to produce endless supplies of tapioca to refuel his powers. is a feature-length made-for-TV movie that serves as

: It is revealed that the Delightful Children From Down The Lane were originally Sector Z , a top-tier KND team brainwashed by Father. The story centers on the resurrection of ,

: The film explains the significance of the Book of KND, a legendary archive of past stories and the source of the organization's power.

: 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 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