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

“Every hero starts from zero.”

In the Kids Next Door treehouse, a team of kids runs missions against grown-up tyranny, and their old enemies have just joined forces. Father leads the villains in bringing back Grandfather, an evil who ruled when they were children, and he turns them into Senior Citizombies who brew tapioca to keep him alive. Guy Moore and Tom Warburton keep Nigel (Ben Diskin) racing after the Book of K.N.D., which holds the one thing kids have always had against grown-ups.