The knd must find a way to stop grandfather from ruling the world and turning everyone including adults into senior citizen zombies. Meanwhile numbuh one finds out his loser dad was the great numbuh zero.
Below are the links to the web pages where this tv show, Codename: Kids Next Door - Operation Z.E.R.O., can be watched in the browser for free without the need of any special plug-in or download or registration:
Codename: Kids Next Door - Operation Z.E.R.O. (2006)