Codename: Kids Next Door: Operation Z.E.R.O.

The villains of the Kids Next Door, lead by Father, join forces to resurrect the Ultimate Evil, Grandfather, a tyrant who once ruled the world many years ago when most of the villains were themselves kids. However, Father disgraced him that he can't even try to destroy the KND and the Villains were quickly betrayed when they are turned into Senior Citizombies, creatures that are immortal and can transform any living creature into one of them and slaves who are forced to make Tapioca to refuel Grandfather so he can find and destroy the Book of K.N.D.

Billed Cast

Ben Diskin

Nigel 'Numbuh 1' Uno / Hoagie Pennywhistle 'Numbuh 2' Gilligan Jr / Numbuh 101 (voice)

Lauren Tom

Kuki 'Numbuh 3' Sanban (voice)

Dee Bradley Baker

Wally 'Numbuh 4' Beatles / Mr. Fibb / Toilenator / Joaquin / Tommy Gilligan (voice)

Cree Summer

Abigail 'Numbuh 5' Lincoln / Former Numbuh 11 - Cree Lincoln (voice)

Jason Harris

Chad Dickson (voice)

Grey DeLisle

Crazy Old Cat Lady/Gramma Stuffum (voice)

Jeff Bennett

Mr. Boss / Mr. Fizz / Benedict Wigglestein (voice)

Jennifer Hale

Fanny 'Numbuh 86' Fulbright / Computer (voice)

Mark Hamill

Stickybeard (voice)

Tom Kenny

Knightbrace / Mr. Wink (voice)

Maurice LaMarche

Father (voice)

Matt Levin

Patton 'Numbuh 60' Drilovsky (voice)