"Operation: U.N.C.O.O.L." is the second Halloween-themed episode of the animated TV series Codename: Kids Next Door, serving as the follow-up episode to "Operation: T.R.I.C.K.Y.". It first aired on the Cartoon Network in the United States on October 29, 2004.
Plot[]
Sector X is mysteriously attacked by zombies, Numbuhs 78 and 32 getting captured, while Numbuh 43 escapes. Numbuh 43 is located by Sector V, afterwards telling them what happened, and Numbuh is angry that 43 left Numbuh 78 behind.
Sector V goes to the Sector X treehouse and begins to investigate. They are suddenly attacked by the zombies, who turn out to be Nerd Zombies. Numbuhs 1, 3, and 4 are captured, while Numbuhs 2 and 5 get away. They run into Numbuh 43 again, who had snuck into the treehouse as well, then he leads them to where Numbuh 78 is located. They enter the chamber, and Numbuh 5 demands that they grab their "girlfriend", but the boys correct her in saying that "this" Numbuh 78 was one of their rare Yipper Cards.
Numbuh 5 gets angry and leaves them, getting quickly captured by the zombies. All of the zombies soon corner the boys, and Numbuh 43 regrets stealing the card from them. Hoagie takes the card and decides to give it to the zombies, and they all transform into regular nerdy kids again.
Numbuh 2 asks where all their friends are, and the nerds' leader replies that they are being forced to watch Dr. Time-Space And The Continuum, claiming he will not let them go unless they have something to trade. Numbuh 43 decides to give him an extra rare card, and the nerd asks where he got that. A werewolf's howl sounds through the treehouse, and Numbuh 2 replies, "You... didn't."