Name: Operation G.R.O.W.-U.P.
Genre: Comedy
Duration: 25 min

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The Delightful Children From Down the Lane ask Father for his help in destroying the Kids Next Door, forcing the kids into a showdown with their most dangerous enemy.

Codename: Kids Next Door

Operation G.R.O.W.-U.P.

The Kids Next Door try to quietly defend their treehouse from attack while Number One takes a nap; Number Three accidentally takes a mysterious stranger with her to visit Rainbow Monkey Island.

Operation: Q.U.I.E.T; Operation: R.A.I.N.B.O.W.S.

In 'Operation P.I.A.N.O.', a hamster is sent to replace Number Four for disobeying orders and smashing a piano; in 'Operation Z.O.O.', the Kids Next Door are captured by a children's zoo to be their kid exhibit.

Operation: P.I.A.N.O; Operation: Z.O.O.

Operatives are neutralized by Mega Mom and Destructo Dad. Numbuh Two's little brother does anything to hang out with his brother.

Operation: C.H.A.D.; Operation: T.O.M.M.Y.

A children's cable network is interested in the KND; Numbah One believes summer camp brainwashes children.

Operation: C.A.B.L.E.-T.V.; Operation: C.A.M.P.

A fly finds it's way into Treehouse headquarters; the team suspects teen-agers of adult training.

Operation: T.H.E.-F.L.Y.; Operation: P.O.I.N.T.

Gigantic lice infect Treehouse headquarters; Numbuh One has a secret girlfriend.

Operation: L.I.C.E; Operation: L.I.Z.Z.I.E.

Numbuh Four accompanies his father to work; the team travels to the Arctic to stop a scientist.

Operation O.F.F.I.C.E; Operation A.R.C.T.I.C.

The KND battle a monster turnip; Numbuh Two challenges Rupert Puttkin to a mini golf match.

Operation: T.U.R.N.I.P.; Operation: M.I.N.I.G.O.L.F.

Stickybeard sniffs out the Kids Next Door's candy depository and attack their Treehouse to steal it. The KND meet Lasso Lass, the last active member of another era's version of the KND: The Cowboy Kids Club!

Operation: P.I.R.A.T.E.; Operation: C.O.W.G.I.R.L.

The team is left vulnerable when the hamsters go on vacation.

Operation: N.O. P.O.W.U.H; Operation: T.E.E.T.H.

The Kids Next Door learn that the villainous Ice Cream Men have been hoarding their precious supply of soft serve. AND With Numbuh One away, the Treehouse becomes an easy target for raiding adults.

Operation: I-S.C.R.E.A.M; Operation: C.A.N.N.O.N.

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S1 E13 | Operation G.R.O.W.-U.P.