[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/codename_kids_next_door-show_5080.jpg]]

''Codename: Kids Next Door'' (2002-2008) is an [[Creator/CartoonCartoons original animated series]] from Creator/CartoonNetwork about a team of five ten-year-olds who are members of a secret organization that fights adult tyranny.

The idea grew out of side characters for Mr. Warburton's failed series ''Kenny and the Chimp''. The show featured five kids who lived next door to Kenny with no parental supervision. The five were simply troublemakers who enjoyed terrorizing the neighborhood. When the show fell through, they were retooled into the stars of their own show. The pilot was submitted for Cartoon Network "Big Pick Weekend", where viewers were allowed to vote on the next cartoon series. ''Kids Next Door'' reached the final three and was ultimately the winner.

The five kids became Sector V, a FiveManBand in the worldwide organization known as the Kids Next Door. Numbuh One, TheLeader, is a ProperlyParanoid ConspiracyTheorist who is always seen wearing sunglasses (and has no hair). Numbuh Two, TheSmartGuy, is an inventor known for cracking {{pun}}s at inappropriate times. Numbuh Three, TheChick, is TheDitz of the team, constantly happy and serving as the team doctor. Numbuh Four, TheBigGuy, is a BookDumb kid who holds an invaluable amount of street smarts. Numbuh Five, TheLancer, is [[OnlySaneMan the only sane girl]] trying desperately to keep the team together.

Together, the KND of Sector V fight alongside their compatriots-in-childhood against numerous villains -- including [[CreepyChild The Delightful Children from Down the Lane]] (and their creepy father, Father), Numbuh Five's [[FaceHeelTurn traitorous teenage sister]] Cree, and the CorruptCorporateExecutive Mr. Boss -- who hates children and wants them enslaved.

The show was known for its consistent continuity and its use of the StoryArc, as well as several ParentalBonus moments -- including an AffectionateParody of ''Anime/TheAnimatrix'' short "The Second Renaissance" and a MusicalEpisode starring, ''of all bands'', Music/{{GWAR}} -- that attracted fans [[PeripheryDemographic outside its intended audience]]. Another one of the show's big draws was the aversion of the SpotlightStealingSquad, InvincibleHero, ''and'' FailureHero tropes; a new episode can actually have ''suspense'' over who's going to win or lose, and it's hilarious and/or awesome either way.

Episodes followed a specific naming pattern: the episode title is always "Operation: [X]" -- where [X] is an acronym (as an example: "T.E.E.T.H.") -- and both the acronym itself ''and'' the phrase it stood for (using the prior example: "Tooth Extracting Enemy Terrorizes Headquarters") served to give viewers a general idea of the episode's plot.

''Kids Next Door'' ended after six seasons, one movie (''Operation: Z.E.R.O.''), and a crossover with ''WesternAnimation/TheGrimAdventuresOfBillyAndMandy'' ("The Grim Adventures of the KND"). The GrandFinale, "Operation: I.N.T.E.R.V.I.E.W.S." ("It's Now The Extra Really Very Interesting End Wrap-Up Story"), answered [[WhatHappenedToTheMouse a few]] [[Headscratchers/CodenameKidsNextDoor questions.]] There are no DVD box sets, but various episodes have been released on compilation sets.

This show now has a [[Characters/CodenameKidsNextDoor character sheet]] and its [[TheMovie movie]] now has its own page: ''WesternAnimation/OperationZERO'', as well as its original pilot, ''WesternAnimation/NoPInTheOOL''.

This series has nothing to do with GirlNextDoor.

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!!''Codename: Kids Next Door'' provides examples of the following tropes:

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* AbnormalAmmo / EdibleAmmunition: Goes hand-in-hand with the [[BambooTechnology 2×4 technology]] used by the KND, but used by other organizations and villains as well. The Six Gum Gang uses revolvers loaded with already-chewed gum, a sea coffee-drilling rig is equipped with coffee-bean turrets and one episode even has the U.S. government using giant robots that shoot ''bubblewrap''.
* AbortedArc: The Clam Cannon, no wonder it was a one-shot weapon.
* AdorablyPrecociousChild: Most, if not all male KND operatives fit the description to perfection.
* AdultFear: [[http://bit.ly/kuxK25 "Operation: W.H.I.T.E.H.O.U.S.E."]]. A young idealistic rebel wakes up one day and discovers that he has grown old and respectable and abandoned his ideals. His old comrades have become corrupt supporters of TheMan, he is married to a shrew who used to be his girlfriend (though she was a shrew when she was his girlfriend so nothing changed there), his son despises him, his best friend has been driven insane by his betrayal and [[spoiler:he is faced with the choice of crossing the MoralEventHorizon or be destroyed.]]
* AdultsAreUseless: Adults in the series tend to be evil or clueless. Exceptions include Moosk, Dr. Sigmund Teef, and possibly Lasso Lass. Some of the episodes that feature the kids' parents also prove to be exceptions as well, especially in the ''Operation: Z.E.R.O.'' movie.
* AffectionateParody: Let's see, we got...
** ''Film/TheMatrix'' (even a parody from ''Anime/TheAnimatrix'')
** ''Film/TheLordOfTheRings''
** ''ComicBook/XMen''
** ''Franchise/{{Alien}}''
** ''Franchise/JurassicPark''
** ''Franchise/PiratesOfTheCaribbean''
** ''Film/FantasticVoyage''
** ''Film/MinorityReport'' (yeah you read right)
** ''Franchise/StarTrek''
** ''Franchise/StarWars''
** ''Film/TheShadow''
** ''Film/{{Hero}}''
** ''Anime/DragonBallZ'' (part of a RashomonStyle episode)
** ''Theatre/WestSideStory'' (of all things)
** ''Series/HogansHeroes''
** ''Anime/FullmetalAlchemist'' in "Operation: C.A.R.A.M.E.L." ([[HilariousInHindsight even sort of predicted the ending for the series proper]])
** Hell, even ''VideoGame/BaldursGate'' is given a ShoutOut to in one episode (the character Moosk is Minsc from the game).
** Numbuh Five's solo, candy-related adventures frequently bear an uncanny resemblance to the exploits of one [[Franchise/IndianaJones Henry Jones, Jr.]]
** Chester's LotusEaterMachine parodies [[VideoGame/KingdomHearts The Destiny Islands.]]
** "Operation: M.O.O.N." parodies ''Film/TheTrumanShow''.
* AIIsACrapshoot:
** The A.I. of Sector V's treehouse starts singing [[Film/TwoThousandOneASpaceOdyssey "Daisy Bell"]] when Nigel tries to attend Lizzy's sister's wedding.
** Also, the Safety Bots. Lampshaded by their creator:
--->'''Senator Safety:''' How come every time you build giant robots, they gotta take over the world?
* AllAccordingToPlan: A plot twist so common that it's also a RunningGag for one character for a time.
* AllJustADream: A few episodes end this way, most of the time with an OrWasItADream vibe.
* AmbiguousCloneEnding: The ending of "Operation: P.R.E.S.I.D.E.N.T.".
* AngelsPose: The series' logo.
* AnnoyingYoungerSibling:
** Numbuh Two's little brother Tommy.
** Numbuh 86's little brothers. No wonder she hates boys. (Though this in her own words. When shown, its revealed they're not as bad as she made them out to be.)
** Numbuh Three's sister, Mushi. Which is ironic as they actually started out getting along with each other.
** Numbuh 362's little brother Harvey, Numbuh 363, who constantly antagonizes Numbuh One.
** Numbuh Four's baby brother Joey. (But Numbuh Four quickly turns into a PapaWolf if someone messes with Joey.)
** Cree considers Numbuh Five to be this to her.
* AnthropomorphicFood: Grandmother Stuffem creates this to force itself into kids' mouths.
* AntiVillain:
** Count Spankulot makes it a point to only spank children who deserve it.
** Professor XXX-L. His actual goal is really nothing sinister (he is trying to perfect the snowcone) but he does tend to violently oppose anyone who tries to stop him. His goal in the "Kenny and the Chimp" segment in the pilot was to fight the PTA; exactly why, he didn't say, but apparently, he got his ass handed to him by them.
* ArtEvolution: Over the course of the series, the animation became more consistent and the colors became richer.
* ArtShift: "Operation: R.E.P.O.R.T."
* [[AscendedFanboy Ascended Fangirl]]: [[spoiler:Numbuh Three grows up to become the president of the Rainbow Monkey Corporation in "Operation: I.N.T.E.R.V.I.E.W.S."]].
* AsianAirhead: Kuki Sanban (a.k.a. Numbuh Three) is effectively like a younger, prepubescent Hay Lin. An adorable, girly, kindhearted, rather prissy girl who is personified as being extremely scatterbrained. ThatOtherWiki says that [[ObfuscatingStupidity she is only acting stupid so she doesn't feel sad]].
* AssumedWin / CrackDefeat: "Operation: E.L.E.C.T.I.O.N.S."
* AttackOfThe50FootWhatever: There are ''lots'' of episodes that involve a HumongousMecha (or even more than one) but one that doesn't, but still fits the Trope, is "Operation: F.O.O.D.F.I.T.E.", where Grandma Stuffum uses a "Slamwitch" (a giant, demonic, carnivorous, sandwich) to fight Sector V; they respond by calling their pet hamster Joaquin, who uses some device to grow to giant size to fight it (and then eat it).
* AttackPatternAlpha: "Kids Next Door: Battle Stations!"
* AuthorAppeal: {{Humongous Mecha}}s.
* AuthorityEqualsAsskicking: If you're Supreme Leader, it's common knowledge you're a great fighter. I.e.: Numbuh Zero, 100, 274 and 362. Especially 362.
* AuthorityInNameOnly: King Sandy really isn't king of anything. In fact, it's possible he and his three cousins simply CannotTellFictionFromReality.
* {{Badass}}:
** Cree Lincoln
** Moosk; he's the only adult beside Monty Uno who has Numbuh One's full respect, for very good reasons.
* BadHumorTruck: Ice cream men are bad guys in this series, or at least one group of them; both Father ''and'' Mr. Boss have them as Mooks.
* BadassAdorable [[BadassArmy Army]]: The entire Kids Next Door, though the "adorable" part may depend on certain operatives.
* BadassBeard: Captain Stickybeard, of course. (Might also count as a CaptainColorbeard, technically.)
* BadassBoast: There are quite a few, in particular [[spoiler:Negative Numbuh 86]]'s epic line in "Operation: P.O.O.L.":
-->"In the name of the One Supreme Ultra DNK Leader, Welcome... ''to the worst day of your lives.''"
* BadassSanta: In "Operation: N.A.U.G.H.T.Y.", Santa is a clear satire of Professor Charles Xavier, complete with a team of elves that are satires of the X-Men.
* BadassFamily / BigScrewedUpFamily: The Unos, so very much. On one side, [[spoiler:we have Nigel's father, the original Numbuh Zero, who in his youth started a new age of KND. The last episode also reveals his mother was the first female operative]]. On the other side, though, [[spoiler:Father is Numbuh Zero's brother and thus Nigel's uncle, and ''their'' father is the aptly-named Grandfather, who is ten times worse than Father. Add in the Delightfuls (missing KND operatives turned permanently evil) as Father's adopted children... and there you go]].
* BadassNormal: The whole premiss of the KND is pretty much set up like this considering more than half of the things they can do, and end up pulling off. Hell sector V took down Father after he [[spoiler:TURNED INTO A FUCKING FIRE-BREATHING DRAGON!!!!]]
* BadFuture: "Operation: F.U.T.U.R.E.", naturally. [[spoiler:Fortunately, they are able to SetRightWhatOnceWentWrong to prevent it from happening.]]
* BadGuyBar: We see it in "Operation: F.L.U.S.H.", with plenty cameos from minor villains of the show.
* BalloonBelly: All of Sector V after Gramma Stuffum's attack in "Operation: N.O.-P.O.W.U.H." (but not as bad as Numbuh Two).
* BambooTechnology: Actually, two-by-four technology.
* BananaPeel: In "Operation: S.N.O.W.I.N.G.", Numbuh One throws some banana peels before a quadruped HumongousMecha (straight out of ''Film/TheEmpireStrikesBack''). The mecha pilots burst into laughter at this sight, but then their vehicule steps on a peel in the snow... and immediately topples to the side.
* BaseballEpisode: "Operation: B.R.E.A.K.U.P."
* BatmanGambit: [[spoiler:Double subversion in "Operation: U.N.D.E.R.C.O.V.E.R." One of the Delightful Children becomes a ReverseMole, making Sector V think he's helping them destroy the other DCFDTL's coffee supply, when it's actually a trap to steal the teams top-secret plans. As it turns, out, the KND are pulling a Batman Gambit of their own; the briefcase they steal actually has a bomb, and after the Delightful Children spring their trap, the heroes get the last laugh and manage to destroy the coffee supply anyway.]]
* BathroomBreakOut: President Uno does this during "Operation: W.H.I.T.E.H.O.U.S.E.".
* BeachEpisode: "Operation: B.E.A.C.H."
* BeardOfEvil: Negative Numbuh Four in "Operation: P.O.O.L.".
* BelligerentSexualTension: Short-fused shorty Numbuh Four and [[GenkiGirl Genki]] {{Tsundere}} Numbuh Three. Truly, a destined pair.
* BeQuietNudge: Numbuh Five is usually the one to elbow her teammates when they need to shut it, like with Numbuh Four at the end of "Operation: R.O.B.B.E.R.S.", or [[CannotKeepASecret Numbuh Three]] in "Operation: C.A.K.E.D.-F.I.V.E.". Note that it hardly works on the latter: if you truly want Kuki to shut up, you need to gag her.
* BerserkButton:
** Numbuh Three: "Toys? I don't want toys. I WANT REVENGE!!!"
** DO NOT HARM NUMBUH FOUR's LITTLE BROTHER (OR HIS CRUSH, NUMBUH THREE) IN FRONT OF HIM.
** If you think you're going to overcharge Numbuh 1 at a restaurant, you've got another thing coming, but it was all for the better, as it did snap him out of his love-induced brainwashing once (and just as the Yes Dear 5000 was about to get a complete hold on him).
** You're going to put Numbuh 83 in a dark room!? You fool!
** Saying anything anti-feminist around Numbuh 86 is a big No-No.
** Also, ''never'' call Numbuh 86 "Toots", as Numbuh Two learned the hard way.
** Don't ever do anything that drives Laura to her transformation.
* {{BFG}}: Including, but not necessarily limited to ones that shoot kangaroos, ''mattresses'', and ''grizzly bears''.
* BigBadDuumvirate: Father and Mr. Boss, depending on the episode.
* BigEater: Numbuh Two. He not only loves to eat (and has the girth to prove it) but he's far more resistant to Grandma Stuffem's demonic food than the other members of the team.
* BiggerBad: Grandfather
* BigGood: Numbuh 362 for most of the series. The movie introduces Numbuh Zero as a more mythical Big Good, who is [[spoiler:revealed to be Nigel's dad.]]
* BigLabyrinthineBuilding: A huge, labyrinthine, ''treehouse''.
* BigNo: Numbuh Four, once Number Five becomes a senior citizombie.
* BigShutUp: Lizzie in "Operation: D.A.T.E.".
* BilingualBonus:
** Numbuh Three's last name, Sanban, loosely translates to "third" in Japanese.
** Mushi's first name translates to "insect".
** In "Operation: T.R.I.P.", the Interesting Twins from Beneath the Mountain crash into a poster which reads いたい ("itai"), which translates from Japanese to "painful", lampshading their ChewToy status in the episode.
** Numbuh One's last name, Uno, is Spanish for "one".
* BittersweetEnding: The series finales ends with Numbuh One [[spoiler:being selected to joined the Galactic Kids Next Door. But is forced to leave Earth and it's unlikely that he will ever see his friends and family ever again.]] ...until we see the [[spoiler:absolute ''final'' scene, that is. Then we discover, from what Numbuh Five says, that the grown-up Sector V had the last laugh on Father, and Numbuh One is, indeed, coming home.]]
* BirthdayEpisode:
** There are plenty of episodes where it is one of The Delightful Children from Down the Lane's birthday and the KND try to take their cake.
** Another episode starring Numbuh Three dealt with celebrating ''her'' birthday. (The episode sets it up to make the viewers believe she's a DistressedDamsel; however, as it turns out, she becomes the ''hero'', defeating the villain ''by herself''.)
* BlackBeadEyes: What most of the characters have, however there are a few exceptions.
* BlastingItOutOfTheirHands: {{Exaggerated|Trope}} in the episode "Operation: V.I.R.U.S."; Numbuh One is confronted by Cree Lincoln and pulls out a handgun, which she shoots it out of his hand with her [[ArmCannon Arm Blaster]]. Then he pulls out ''seven other guns'' from [[{{Hammerspace}} various spots on his body]] which she blasts out one by one. Thus Nigel is left with only... a comb, which Cree also shoots from his hand.
* BlessedAreTheCheesemakers:
** In "Operation: L.I.C.E.", the giant mutated lice are killed by cheddar.
** "Operation: T.H.E.-S.H.O.G.U.N." provides a particularly over-the-top example.
* BondOneLiner: "Operation: I.N.T.E.R.V.I.E.W.S.": "I've always wondered how the Delightful Children from Down the Lane all went to the bathroom together."
* BoisterousBruiser:
** Numbuh Four, and how.
** Also, Moosk from "Operation: K.N.O.T.".
* BookDumb: Numbuh Four is this, big time. [[spoiler:He also grows out of it big time, graduating from Harvard of all places and becoming a doctor.]]
* BrainsAndBrawn: Numbuhs Two and Four.
* {{Brainwashed}}: DoubleSubversion in "Operation: C.A.M.P.".
* BrainwashedAndCrazy: The Delightful Children from Down the Lane
* BratsWithSlingshots
* BrickJoke:
** Of the "very long time" and "blink and you'll miss it", variety. In "Operation: F.L.A.V.O.R.", Numbuh Five tastes the "fourth" flavor of ice cream, but is [[TheUnreveal stopped before she can exclaim what it tastes like]]. Fast forward to ''WesternAnimation/OperationZERO'' and the [[spoiler:title character, shortly after recommissioning]] briefly says what it is: [[spoiler:"I have a hankering for some blurpleberry ice-cream -- it's the closest thing to the fourth flavor I've ever tasted!"]]
** Not to mention [[http://www.youtube.com/watch?v=jxSLzcvphCw Numbuh Four's singing at the ends of the "P.O.O.L." and "M.O.O.N." operations]].
* BrokenStreak:
** In "Operation: C.A.K.E.D.-F.O.U.R.", the Gilligans' Tube-A-Thon losing streak is broken by Tommy. Hoagie would've finished the race as well, had there not been a FriendOrIdolDecision.
** Speaking of the "C.A.K.E.D." missions, each one that comes up usually has the KND ruining the Delightfuls' Birthday in some form or another. However on the Sixth one (the title which cleverly omitted the "C.A.K.E.D." from it), the Delightfuls manage to get one over on the KND in a delicious irony: [[spoiler:they have three of Sector V deliver the cake]] without them even knowing it till the end.
* BucketHelmet / CoolHelmet: A lot of operatives have one of these, especially Numbuh 86 and Numbuh 362 who have ones that are made of colanders.
* BurningWithAnger: Father is not just WreathedInFlames, but they increase in intensity when angry.
* ButNotTooForeign: Numbuh Five (and her sister Cree) are half-French, half African-American. Both of their parents are still Black, though. And their father is a parody of Creator/BillCosby.
* ButtMonkey: Numbuh Four, as well as Tommy.
* CaffeineBulletTime: "Operation: U.N.D.E.R.C.O.V.E.R." has a VillainOfTheWeek that has SuperSpeed from consuming large amounts of coffee regularly. When Numbuh Five gets a coffee overdose of her own, she gets temporary SuperSpeed as well, [[TooFastToStop but notably crashes pretty quickly and realistically.]]
* CainAndAbel: Three groups.
** Numbuh Five and Cree.
** Numbuh Three and Mushi, to a lesser extent.
** Not to mention [[spoiler:Numbuh Zero and Father]].
* TheCakeIsALie: In "Operation: I.N.T.E.R.V.I.E.W.S.", KND scientist Numbuh 74.239 claims he has taken the Delightful Children from Down the Lane's cake and announces a scavenger hunt for it. [[spoiler:Numbuh One]] wins -- only to find out that [[spoiler:the scavenger hunt was a test to see who will be chosen to be the representative of Earth in the Galactic KND, and the promised cake was actually just a cupcake, which 74.239 happily scarfs down]].
* CannotTellALie: Mrs. Thompson. Being unable to lie was a downside of the curse that made her the [[OurWerebeastsAreDifferent Were-Dog Queen]].
* CardCarryingVillain: Nearly all of the villains are this. Supervillain meetings are held regularly. Several lines in the series directly mention this trope, like this gem from "Operation: T.R.I.C.K.Y.":
-->'''Stickybeard:''' (''to [[MinionWithAnFInEvil Dumb John Silver]]'') '''You're supposed to be an EVIL pirate!'''
* CerealViceReward: The KND stealing the Delightful Childrens' birthday cake and ruining their birthdays in the "C.A.K.E.D." episodes).
* CerebusSyndrome
* ChainedHeat: Numbuh One and [[FallenHero Chad]] as part of a subplot of "Operation: T.R.E.A.T.Y.". [[spoiler:Notably, the usual way this plays out is subverted. It ''worsens'' their relationship and ends with the two of them fighting to the death in a way that's ''not'' PlayedForLaughs.]]
* CharlesAtlasSuperpower: In general, all of the operatives -- especially Numbuh One and Numbuh Four -- who come out of training seem to have some degree of superhuman power in one way or another; leaping ridiculous distances, surviving explosions and hard blunt trauma, punching out and tossing around grown men and teenagers, and other odd displays of strength are put on display pretty often. Numbuh Four in particular, despite his [[TheNapoleon small stature]], is once even seen launching a solid gold dodge-ball several feet into the air hard enough to ''destroy a stone statue'', among other things. All in all, the more normal operatives are usually still strong enough to beat up the average adult or teen thug bare-fisted -- such as Numbuh Two and Three from time to time -- but the very ''best'' operatives can even take down the super-villains, such as Numbuh One.
* ChefOfIron: Granny Stuffem and her creations.
* ChewingTheScenery: ''Everyone'', at least once. The voice actors really held nothing back.
* ChildHater: Although most of the KND's foes are evil adults, only a few of them actually qualify for this trope (others have different reasons for causing them grief). Among the worst are Father, Mr. Boss, Mr. Wink and Mr. Fibb, Chester, and a few one-shot villains. [[spoiler:Note that Mr. Boss makes an exception for his own children.]]
* ChildrenAreInnocent: Subverted, as the KND is rebellious. Though played straight because most of them don't know where babies come from. This is subverted with Numbuh Five, who does know, because her father is a doctor. Plus she mentions she has an older brother who has a few kids.
* ChocolateFrostedSugarBombs: Rainbow Munchies, a cereal that ''everyone'', heroes and villains alike (except Knightbrace) love. "Operation: M.U.N.C.H.I.E.S." has Sector V fighting with practically every villain on the show over the last box of the stuff in a supermarket.
* ChristmasEpisode: "Operation: N.A.U.G.H.T.Y."
* ClingyJealousGirl: Nigel's girlfriend, Lizzie.
* ClosetGeek: Numbuh One towards Rainbow Monkeys.
* CloserThanTheyAppear: The mirror on one vehicle says "Missiles in mirror may be closer than they appear."
* ColorCodedCharacters / [[FiveManBand Five-Kid Band]]: Sector V
** Numbuh One[=/=]Nigel, "TheLeader" -- Red
** Numbuh Two[=/=]Hoagie, "[[TheSmartGuy The Inventor]]" -- Light Blue
** Numbuh Three[=/=]Kuki, "[[TheChick The Flirt]] / TheDitz" -- Green
** Numbuh Four[=/=]Wally, "[[TheBigGuy The Tough Kid]] -- Orange
** Numbuh Five[=/=]Abby, "[[TheLancer The Cool Kid]]" -- Blue
** Numbuh Six[=/=]Bradley, "TheSixthRanger" -- Monochrome
* CombatTentacles: The giant turnip's in "Operation: T.U.R.N.I.P.".
* ComedicSpanking: Count Spankulot is built around this trope, [[ShapedLikeItself as should be apparent from his name.]] He's pretty much a vampire, [[OurVampiresAreDifferent except that his powers are based on spanking naughty children rather than sucking blood.]] (Note that Spankulot is the only villain in the series to get in actual legal trouble for what he does, as he has taken this too far more than once.)
* CompetenceZone: Anyone 13 or older is a threat to the Kids Next Door, and must have their memories of the organization erased. In this universe, unlike the real one, many teenagers serve as loyal minions for adults (although there are plenty who just view kids as irritants). The show eventually subverted this in the episode "Operation: M.A.U.R.I.C.E.", which revealed that some teenaged KND agents are retained as undercover operatives. Which may or may not be a subtle ShoutOut to the Steve Miller Band.
* ConspicuousCG: Sector V's treehouse when it turns into a rampaging monster chasing Nigel and Lizzie in "Operation: G.I.R.L.F.R.I.E.N.D.".
* ConspiracyKitchenSink: This show is practically built on conspiracies (sometimes literally). Not surprisingly, the KND were even responsible for the fake moon landing.
* ContestWinnerCameo: In "Operation: P.R.E.S.I.D.E.N.T.", complete with no spoken lines, and an overly detailed face!
* ContinuityCreep
* ContinuityDrift: The first season finale, "Operation: G.R.O.W.-U.P.", seems kind of off after viewing later seasons. Instead of getting decommissioned, Nigel just leaves the group and gets a job with his memories intact. It stands to reason that they had no reason to go after him. By the system he was still 10 years and it wouldn't have alerted the decommissioning department. (That, combined with the fact that Numbuh 86 hasn't been introduced yet.) None of his team would report him, either, so as far as anyone outside his team knew, nothing had changed.
* ContinuityNod: Frequently, such as Numbuh One recognizing AGlitchInTheMatrix when he remembers that [[spoiler:Numbuh Four can't swim.]]
* ContinuitySnarl: The reason that Numbuh five hates the Delightful Children so much is because they apparently caused Numbuh One to go bald, yet in "Operation: T.R.E.A.T.Y.", Numbuh One is seen during his training as already being bald, despite this taking place long before he met the Delightful Children, and possibly before [[spoiler:Sector Z had become brainwashed by Father]].
* CoolAndUnusualPunishment: In "Operation: G.I.R.L.F.R.I.E.N.D.", the Nerds Force captured members of the team to watch reruns of a show called ''Dr. Time, Space, and the Continuum''. (Not the last time this obvious parody of ''Series/DoctorWho'' is mentioned negatively. Clearly, the writers were not fans.)
* CoolShades: Numbuh One's got 'em.
* CowboyEpisode:
** "Operation: R.O.B.B.E.R.S."
** "Operation: M.E.S.S.A.G.E."
** "Operation: N.U.G.G.E.T."
* CrapsackWorld:
** The world under Grandfather's rule. Imagine child labor during the Industrial Era and take it UpToEleven.
** What the world ''normally'' is. Let's face it, ''KND'' is one of the most screwed-up worlds.
* CrazyCatLady: There's a recurring villain on the show with that ''exact'' name. She not only has an army of feral cats, but can combine them all to function together like one giant cat.
* CreditsGag: The production team is given military-inspired job titles.
* CreepyChild:
** Creepy ''children'': The Delightful Children from Down the Lane, who all speak and even ''move'' in unison. Subverted in one episode where one of the DCFDTL appears to break free from the group to act as [[TheMole a spy]] for the KND Double Subverted when [[spoiler:he turns out to be the ReverseMole and levitates back to them, and there's even a sickening squelching noise when he reasserts his place. His football helmet actually grew back on his head at the time, too.]] [[spoiler:And that's on top of ''all five'' Delightful Children actually being brainwashed KND operatives. ''Triple'' Reverse Mole?]]\\\
[[spoiler:AND they turn back into KND operatives in ''WesternAnimation/OperationZERO'' after being recommissioned. (Quadruple Reverse Mole) This turns out to be a temporary [[SubvertedTrope Subversion]] of the Creepy Child. Unfortunately, this is a DoubleSubversion, as they turn back into the Delightful Children. ([[DoubleReverseQuadrupleAgent Quintuple Reverse Mole]] -- Let's leave it at that.) Of course they stop talking in unison then too for the most part when they figure out they've been had; the others turn to Lenny and say, "Lenny, you're an idiot", suggesting the whole thing was ''his'' idea.]]
** Their counterparts from Japan, The Interesting Twins from Beneath the Mountain, also fall into this.
* CreepyMonotone: See directly above. The Delightfuls subvert this a few times, though, most notably in "Operation: G.R.O.W.-U.P.", mainly to highlight just how ''scary'' an angry Father is.
* {{Crossover}}: "[[WesternAnimation/TheGrimAdventuresOfBillyAndMandy The Grim Adventures]] of the Kids Next Door". Oddly enough, although Numbuh Three made a [[{{Cameo}} cameo]] appearance in ''Billy & Mandy's Big Boogie Adventure'', she didn't acknowledge -- or even seem to remember -- that in the actual crossover. (Over course, while the crossover was shown after the special was, it was never stated which story happened first, chronologically.)
* CrouchingMoronHiddenBadass: Sector V, initially. Being the main characters of the show, it's implied at first that they're the ''only'' Kids Next Door operatives; however, when the organization is shown to have teams across the globe, Sector V is shown to be one of, if not ''the'' [[LetsGetDangerous best around.]]
* {{Cyborg}}: Bradley, after getting run over by a car (Which incidentally Cree happens to be driving) and then being healed with cybernetic implants, becoming R.O.B.O.B.R.A.D.L.E.Y.
* DanceBattler: The school musical episode, where the performers (led by the gang) use choreographed dancing to dodge laser blasts [[ItMakesSenseInContext fired by the Delightful Children's battlesuit.]]
* DarkestHour: The season 1 finale. The Delightful Children have turned Numbuh One into an adult, leaving Sector V leaderless, the treehouse is destroyed, and Numbuh One has been forced to get a job as an ice cream man for the Children. This was before the rest of the KND was introduced properly, so they couldnt even call on any reinforcements. Sector V is reduced to using a cardboard box as a temporary HQ.
* DarkhorseVictory: "Your new fourth grade president is.... EGBERT EGGLESTON!"
* ADayInTheLimelight
* DemonHead: Numbuh Three often displays this.
-->'''Kuki:''' Toys? I don't want toys... '''I WANT REVENGE!!'''
* DisguisedInDrag: Numbuh Four becomes Numbuh 4-30teen-7 for "Operation: S.L.U.M.B.E.R.".
* DisneyVillainDeath: The Delightful Children and Father both fall victim to this in the GrandFinale, though the latter case is subverted.
* DistantFinale
* DoesNotLikeMen:
** Numbuh 86. Subverted in a comic where she's accidentally decommissioned, and starts to smooch every boy on Moonbase. HilarityEnsues. [[spoiler:She recovers, though.]] This subversion carries UnfortunateImplications, as it is implied that whatever made her hate boys happened after she joined the KND.
** The villain in "Operation: F.U.T.U.R.E.". She goes so far as to try to wipe out the gender over 75 years, with the help of time travel.
* DopeSlap: Numbuh Five dope-slaps Numbuh Four after the latter eats some Coco Nut Logs despite being allergic to coconut.
* TheDragon / DragonInChief: The Delightful Children from Down the Lane
* DrinkingContest: The ''Franchise/PiratesOfTheCaribbean'' parody episode replaces the alcohol with mugs and sacks of pure sugar.
* DrivenToSuicide: Both unintentional and subverted with [[spoiler:[[IncendiaryExponent Hotheaded]] Numbuh Three in "Operation: H.O.T.S.T.U.F.F.". Subverted because while her house is about to blow up due to her [[NiceJobBreakingItHero messing with the thermometer]], she doesn't care, because she has power over the house, though it's not exactly suicide.]]
* DudeWheresMyReward: Tommy Gilligan saves the organization, but doesn't get re-enlisted due to security measures.
* [[EleventyZillion Eleventy Buh-million]]
* EmbarrassingButEmpoweringOutfit: Battle-Ready Armor in its inactive state.
* EmbarrassingFirstName: Numbuh 86's real name is Fanny. The joke has some UnfortunateImplications when you realize what the Scottish-accented Fanny's name ''means'' in her homeland... Further implications abound when you take into account the fact that she's a complete [[StrawFeminist FemiNazi]].
* EnemyMine:
** In "Operation: I.T.", the Delightful Children sell Father out and help the KND, because [[EvenEvilHasStandards even THEY can't stand broccoli.]]
** Rather large example in "Operation: M.U.N.C.H.I.E.S.". After Sector V spent the whole story fighting nearly ever villain in the series over the last box of cereal in a supermarket, Knightbrace grabs it, but since he's a villainous dentist he intends to destroy it, not eat it. So the heroes call a truce with the other villains to get from him. (And then all of them are able to share it at the end, making it a happy ending for everyone ''except'' Knightbrace.)
** The KND and Delightful Children team up to escape the Child Zoo in "Operation: Z.O.O.".
* EpicFail: In "Operation: D.A.D.D.Y.", Mr. Boss intends to save money by cutting the hair of his own children instead of taking to them to a barber. [[http://images2.wikia.nocookie.net/__cb20100816181353/knd/images/c/c6/Numbuh_85.jpg The resulting haircut on his son is impossibly bad.]]
* EvenBadMenLoveTheirMamas: Subverted by Black John Licorice; according to Stickybeard's sea shanty, he would even steal candy from his own mother.
* EvenEvilHasStandards: Plenty of villains in the series have shown to do this: for example, Stickybeard saves Sector V from the giant white asparagus because while he steals candy from kids, he won't allow anyone to be forced to eat asparagus.
* [[EverythingsBetterWithRainbows Everything's Better with Rainbow]] [[EverythingsBetterWithMonkeys Monkeys]]
* EvilerThanThou: A lighthearted and ''hilarious'' example occurs in "Operation: A.W.A.R.D.S." The nominees for best villain of the year are Father (who is favored to win), Mr. Boss, Grandma Stuffum, and Stickybeard. Unfortunately, after Numbuh One (who they intended to use as the reward) is rescued by the rest of Sector V, the four villains get into a fight over who should win, and when Knightbrace actually opens the envelope to announce the winner, a bomb set by the heroes goes off, preventing anyone from knowing who the winner is. (The fight between the four continues into the end credits.)
* EvilCounterpart: "Operation: P.O.O.L." is all about this. Everyone in the alternate reality is an EvilCounterpart of the people in the "real world" (except if they're evil in our world, in which case they are Good Counterparts. [[spoiler:The biggest difference is, in this case, a few {{Evil Counterpart}}s seem to have some capacity for good at the end. Except Evil Numbuh 4]]
* EvilTeacher: While you would have expected this type of villain to have been common, the team tended to have bigger problems with evil ''students'' than with teachers. In fact, the closest they ever came to a villain like this was Mrs. Thompson, the [[OurWerebeastsAreDifferent Were-Dog Queen]], and [[spoiler:[[NotEvilJustMisunderstood she was a subversion]], having been inflicted by the curse of lycanthropy by an angry ex-husband. She turned out to actually be a rather decent sort in the end. (Well, not decent enough to bend the rules and excuse Numbuh Four's bad schoolwork, even though he was the one who broke the curse, but still decent compared to most adults on the show.)]]
* {{Expy}}: Moosk in "Operation: K.N.O.T." is obviously an Expy of ''VideoGame/BaldursGate'''s Minsk, right down to both characters being voiced by Creator/JimCummings.
* FaceHeelTurn:
** Cree and Chad after they turned 13.
** Also every other decommissioned KND operative [[spoiler:(with the exception of the special ops who keep their memories to spy on the teenagers/adults)]].
** This actually applies to kid characters too; in "Operation: S.L.U.M.B.E.R." [[spoiler:one of the operatives betrays the others because her birthday is coming up and she'd rather just get her heel turn over with sooner than later]].
** "Operation: A.R.C.T.I.C." has [[spoiler:Numbuh 30c sabotaging Sector V's efforts because the villain was just making a snowcone, which Sector V wasn't aware of.]]
** "Operation: T.I.E." (which, ironically has a grown-up protagonist) [[spoiler:has a kid character turn on the others because his father was the head of a big company and wanted Moosk to come back and work for him]].
** [[spoiler:President [=McGarfield=]]] at the end of "Operation: P.R.E.S.I.D.E.N.T.".
* TheFaceless: Played with, for all of Sector V's parents. Numbuh Two and Numbuh Three's parents are [[AvertedTrope Aversions]]. Numbuh One's dad is played straight and then subverted in his first appearance. Lenny's is played straight then subverted in "Operation: U.N.D.E.R.C.O.V.E.R." Numbuh Four's parents are subverted and played straight when wanted, and Numbuh Five's parents play it straight.
* FacePalm: Frequent, mostly for Numbuh One and Numbuh Five.
* FakeDefector: The teenager in "Operation: F.U.G.I.T.I.V.E." is often mistaken for one. [[spoiler:Maurice and Chad are actual ones.]]
* FallenHero:
** Both Cree and Chad. Cree is also a BrokenPedestal.
** Mr. Wink and Mr. Fibb might qualify, ''possibly''. They were members of a group that was similar to the KND before they grew up and turned rotten. (Whether they were any ''good'' at it, on the other hand, isn't clear.)
* FalseStart: Numbuh Four's crush on Numbuh Three. This quickly becomes a RunningGag.
* FantasticVoyagePlot: "Operation: S.P.R.O.U.T."
* FateWorseThanDeath: Eating Broccoli is seen as this. Even so much as the threat of it is one of the few things that can bring the series BigBad, Father, to his knees. Brussels sprouts as well, as indicated in "Operation: S.P.R.O.U.T.".
* FatSweatySouthernerInAWhiteSuit: Jimmy Nixon [=McGarfield=], the Fourth Grade President-for-Life, is a tween example. He starts out with the typical white suit [[spoiler:but gets a black one once he's officially a villain (and Vader parody)]].
* FelonyMisdemeanor:
** Almost all the villains are built on this. Simple things most kids don't like doing such as homework, washing dishes, and eating vegetables are blown to world-destroying proportions. Usually because said villains take it to said proportions.
** One episode features a hardware-store owner who wants to eliminate two aviators who bought their plane parts from him. Why? Because they kept ''smudging his counter with chili''. DisproportionateRetribution much?
** This show as a whole is built on this, to an ''Literature/AnimalFarm''-esque degree. Anything that is kid-oriented is ''good''! [[ParanoiaFuel Anything that is adult-oriented or that adults make kids do for their own good is ''vile and evil''!]] Which makes the existance of [[RuleThirtyFour smutty KND pictures/fanfic]] somewhat of a violent whiplash of FridgeLogic...
** This kids = good/adults = bad thing is taken to such a degree that in "Operation: P.O.O.L." it is made to be a bad thing that the adults were doing the things kids do (playing games, getting allowances, etc.) while kids do the things adults do (go to work, taking care of the adults) on a relatively daily basis. How funny that the actions are only awful when they're not being done by their accepted respective age groups.
** It's normally only shown to be bad when the supervillains take it to extremes; the KND are normally shown having really good relationships with their own parents, even when 86's father is [[spoiler:Mr. Boss]], and they even state in some episodes that they only fight evil adults. The supervillains' plots are normally something most normal adults in the series would likely have a problem with if they knew (in some cases, this is shown actively).
** And at the end of "Operation: I.N.T.E.R.V.I.E.W.S.", it's revealed that [[spoiler:adulthood is literally a disease. One that's spreading unchecked across the universe]].
* FireballEyeballs: Numbuh Three's eyes can get this way when she gets angry enough for whatever reason.
* FiveTokenBand: One Brit (with a Spanish or Italian name), one American Jew, one Japanese, one Australian, and one [[TwoferTokenMinority half-French African-American]]. The extended cast is even more varied, though most of the stories take place in the U.S.
* {{Flanderization}}: A minor case with The Delightful Children from Down the Lane, who have always spoken and moved in unison, but in later episodes this is taken even further as they are practically considered a single entity, from wearing a single costume large enough for them to all fit in to having [[CrackPairing all five of them simultaneously date Numbuh Three]].
* {{Flashback}}: Used to open "Operation: M.A.U.R.I.C.E.", "Operation: H.O.M.E.", "Operation: C.A.K.E.D.-F.I.V.E." and "Operation: T.R.E.A.T.Y.".
* {{Foreshadowing}}: In "Operation: P.O.O.L.", [[spoiler:the Delightful Children's good counterparts are called the "Little Traitor Dudes for Children's Defense", indicating they may have been defectors from the KND's EvilCounterpart, the DNK]]. In ''Operation: Z.E.R.O.'', [[spoiler:it's revealed that the Delightful Children are KND operatives turned "traitor", although they were brainwashed, mirroring their MirrorUniverse.]]
* ForTheEvulz: [[spoiler:Negative Numbuh 4.]]
-->'''Numbuh 2:''' Why are you doing this?\\
'''[[spoiler:Negative Numbuh 4]]:''' A simple reason really. I'm ''EVIL!''
* FourFingeredHands: Averted. And to a degree that makes it clear why this trope is usually played straight.
* {{Fratbro}}: Numbuh Four finds a whole tribe of them living under his couch.
* FreeRangeChildren
* FriendlyEnemy: "Operation: E.N.G.L.A.N.D." shows us that Sector E and the "Rowdy Hooligans from Across the Square" put aside their differences to relax and tell jokes. Numbuh One questions why they don't fight each other, and they respond that fighting over a Rainbow Monkey library book is something that Americans would do.
* FriendToAllLivingThings:
** Numbuh Three. Even the Crazy Cat Lady's cats seem to show affection towards her (much to the villain's dismay).
** Numbuh One seems to have a way with animals too in at least one episode, where he befriends a herd of Rainbow Monkeys (''big'' ones) and at the end of the episode, sics them on the Delightful Children.
* FrothyMugsOfWater: Parodied in an episode where root beer is treated like actual beer, complete with references to U.S. Prohibition. In fact, all soda is pretty much treated like alcohol in the KND universe. And then there was the ep where Numbuh Five and Stickybeard had a drinking contest, by downing huge frothy mugs of pure sugar.
* FunWithAcronyms: '''In spades.'''
** Goes hand in hand with IdiosyncraticEpisodeNaming, but the various machines the kids use also have acronym names.
** And in the MirrorUniverse episode, the acronyms are even reversed -- the counterpart to the Kids Next Door (KND) are the Destructively Nefarious Kids (DNK) and the counterpart to the Delightful Children From Down The Lane (DCFDTL) are the Little Traitor Dudes For Children's Defense (LTDFCD).
** Only the pilot episode didn't have fun with them -- "No P in the OOL".
[[/folder]]

[[folder:G-L]]
* GarnishingTheStory: ''Candy'' pirates.
* GangOfCritters: Rainbow Monkeys
* GenderBender: "Operation: F.U.T.U.R.E."
* GeniusDitz: Numbuh Two
* GenkiGirl: Numbuh Three. "Genki" is even her mother's ''name'' (which is rather a subversion as Genki is anything but). What's more, they're [[TalkingToHimself both voiced by the same]] [[Creator/LaurenTom actress]]. Also, her sister Mushi is this.
* GenreSavvy: Father isn't one of the toughest villains for nothing. He tries ageing Numbuh One, but Numbuh One still fights against him. This plays into his next big plot: realizing the KND would probably still fight against him, even as adults, he transforms them into animals instead. He's defeated by Tommy making him a KND operative and transforming him into an animal with his own device. He uses his involuntary induction into the KND to become supreme leader. And that's just some of the most notable of his GenreSavvy moments.
* GettingCrapPastTheRadar: [[Radar/CodenameKidsNextDoor Enough to deserve its own subpage]].
* GirlScoutsAreEvil
* GirlsHaveCooties: "Operation: O.U.T.B.R.E.A.K."; Sector V is sent on a mission to decontaminate the organization's underwater research center from the much-feared '''C'''oojatisnal '''O'''cto '''O'''ogie '''T'''erta '''I'''nfecto '''E'''pi '''S'''treptacaucus.
* GirlsLoveStuffedAnimals: And they absolutely '''''adore''''' Rainbow Monkeys.
* AGlitchInTheMatrix: Numbuh One finds one when he notices that Numbuh Four is at a pool party ''[[spoiler:paddling around]]'' despite being unable to swim.
* TheGloriousWarOfSisterlyRivalry:
** Taken {{up to eleven}} with Numbuh Five and her sister, Cree, a teenager and thus a sworn enemy of the Kids Next Door.
** Also, there have been hints of this between Numbuh Three and her younger sister, Mushi, especially in "Operation: C.L.U.E.S.".
* TheGoodGuysAlwaysWin: Refreshingly averted. The KND fail almost as often as they win, which gives the show a little more tension.
* GoodGuyBar: Lime Ricky's, seen in "Operation: P.O.P." and "Operation: P.R.E.S.I.D.E.N.T.".
* GoshDangItToHeck: Numbuh Four's constant use of the word crud.
* GrandFinale: "Operation: I.N.T.E.R.V.I.E.W.S."
* GRatedDrug: The show has a few examples. Soda is treated like alcohol in a few episodes (the main focus of "Operation: P.O.P."). Also, in "Operation: S.P.A.N.K.E.N.S.T.E.I.N.", Numbuh Two reveals that he was once "addicted" to chocolate sauce, but quit. (But at the end of the episode, eats some of it after Mushi runs away with King Sandy, saying that she's "enough to make you go on the sauce".)
* GrapplingHookPistol: Frequently used by the KND and the villains.
* GroundedForever: Mushi by the end of "Operation: C.L.U.E.S.". [[spoiler:Mr. and Mrs. Sanban grounded Mushi for life after she "killed" Kuki's Posh Party Rainbow Monkey.]]
* GrowingUpSucks: Oh so very much, however a fair few could considered to be lucky enough. In "Operation: I.N.T.E.R.V.I.E.W.S." however, the now adult members of Sector V discover it is a lot better than they thought.
* GunsAkimbo
* HalfIdenticalTwins: The Interesting Twins from Beneath the Mountain.
* HalloweenEpisode: The episode segments "Operation: T.R.I.C.K.Y." and "Operation: U.N.C.O.O.L."
* HammerSpace: Where the KND store most of their cool gadgets.
** There is an episode where Numbuh One pulls out at least eight weapons one at a time from nowhere, only to be blasted by Cree.
** And in "Operation: E.N.G.L.A.N.D.", Numbuh One gives the airport security a nightmare with the mountain of junk on his person.
* HarmlessVillain: The Toilenator. Even at his best, when he actually bypasses the treehouse's security systems and takes control of Sector V, he STILL SCREWS UP a much larger plan that Mr. Boss and the other villains were planning beforehand (leaving him out of ammunition and easily beaten by the real team when they show up). In fact, he does that twice. The Toilenator is so pathetic that he can't even claim the title of "Best Toilet-Based Villain". In "Operation: A.W.A.R.D.S.", he was nominated for that title in an awards ceremony hosted by Mr. Boss, but lost to Potty Mouth.
* HatesBeingTouched: [[CreepyChild The Delightful Children from Down the Lane]]; [[BigBad Father]]; Numbuh 363.
* HeelFaceMole: "Operation: U.N.D.E.R.C.O.V.E.R.", where one of the Delightful Children joins the KND.
* HeelFaceTurn:
** Mr. White, a [[AnimateInanimateObject a pair of underpants]] hired by the Delightful Children to assassinate Numbuh One. [[spoiler:He changes sides when he discovers that Numbuh One folds his underwear.]]
** The Destructively Nefarious Kids (except for Negative Numbuh Four) decide to stop enslaving other kids and decide to create a perfect world for kids and adults.
** Heinrich ([[GenderBender or Henrietta]]) stops being a greedy and corrupt candy hunter when he/she turns back to normal.
* HeroAcademy: The KND's Arctic Base Cadet Training program counts as this.
* HeroesUnlimited: What, you thought the main characters were the only ones?
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* HiddenEyes: Each operative from Sector V has hidden eyes of different varieties. Numbuh One has CoolShades, Numbuh Two has [[GogglesDoNothing goggles that do nothing]], Numbuh Three has EyesAlwaysShut, Numbuh Four has BlindingBangs, and Numbuh Five has a NiceHat [[EyeObscuringHat covering her top face]] (Never mind the fact that they have BlackBeadEyes anyway).
* HighOnCatnip: Catnip causes the Cat Lady's cats to have a sudden dance party.
* HiveMind: The Delightful Children from Down the Lane, who seem to represent conformity personified; although later episodes make it clear that they're not a literal case of one mind shared by five bodies, they always speak and act in unison. It's kind of telling that in [[RashomonStyle "Operation: R.E.P.O.R.T."]], Numbuh Two's [[ArtShift side of the story]] is the only one that depicts them with five separate bodies rather than five heads on a single two-armed body.
* HoistByHisOwnPetard: A few villains are defeated in this fashion.
** For example, [[spoiler:Chester being trapped in his own LotusEaterMachine]].
** An interesting example of this is the way Father was defeated in [[spoiler:"Operation: G.R.A.D.U.A.T.E.S.". While his plan did fail and it did indeed fit this trope, Father was such a ManipulativeBastard that he was able to use it to his advantage for a later scheme, in "Operation: I.T.". (Unfortunately for him, he was ultimately Hoisted by His Own Petard at the end of ''that'' scheme as well.)]]
* {{Homage}}: Many separate occasions.
** Their parodies of ''Franchise/StarWars'' border on ripping it off and ''Film/TheMatrix'' homages don't even pretend otherwise.
** "Operation: N.A.U.G.H.T.Y.", the ChristmasEpisode, is presented in American Comic Format. It includes a group of Santa helpers which {{Exp|y}}ies the ComicBook/XMen (they have one Wolverine, one Nightcrawler, one Angel and one Colossus), a group of enemies that {{Exp|y}}ies the ComicBook/FantasticFour, a Machine that resembles "the Cerebro" and [[spoiler:Numbuh Three turns crazily overpowered and evil, only to be stopped by Numbuh Four, à la ''[[Film/XMenTheLastStand X-Men 3]]''.]]
* HourglassPlot: "Operation: T.R.E.A.T.Y." between Numbuh One and Chad. To hammer the point home, the dominant color of their clothing in the {{Flashback}} (Blue for One, Red for Chad) is the opposite of their clothing in the present (Red for One, Blue for Chad) [[spoiler:and Numbuh One beats Chad by using the same technique Chad beat him with in the flashback.]]
* HumongousMecha: H.I.P.P.Y.-H.O.P., and [[AuthorAppeal many, many others]], made of everything from lawn chairs to treehouses to ''cats''.
* HuntingTheMostDangerousGame: "Operation: S.A.F.A.R.I."
* HuskyRusskie: Moosk
* HypnoTrinket: The Boyfriend Helmet.
* {{Hypocrite}}:
** If ''any'' villain embodies this trait on the show, it's Mr. Fizz. When adults make soda illegal for kids, he becomes a sort of evil Eliot Ness in charge of enforcing the law, and tells the Operatives that the reason children are such a problem is because of their addiction to the stuff. However, his credibility is ruined by the fact that ''he'' is far more addicted to stuff than any of them are, even going so far as to use a caffeine rush to fight them.
** There are also the Vespinaccians; see StrawHypocrite, below.
* HypocriticalHumor: In one episode Lizzie criticizes Nigel about his weight when she's much fatter than he is.
* IAteWhat: Features in "Operation: P.I.N.K.E.Y.E.", where Numbuh Two is eating Nurse Claiborne's crumbles as he's investigating the mystery epidemic of pinkeye going around the school. Once it gets out that it is Claiborne herself who was the one infecting the students with pinkeye, it also becomes apparent that she was using eye crust for her crumbles, making Numbuh Two gag at the very fact that he was eating them. However, at the very end, he goes back to eating them. However, Numbuh Two may have second thoughts after finding out that the filling of the crumbles is [[spoiler:mucus.]]
* ICantBelieveItsNotHeroin:
** Hoagie (Numbuh Two) was so addicted to chocolate sauce that he used to bathe in it. Eventually he had to sign up to Chocoholics Anonymous.
** In the KND universe, candy is the number one source of happiness. If a child is kept from candy too long or is given a non-candy substitute, they go through an exaggerated form of withdrawal.
** In "Operation: L.I.C.O.R.I.C.E.", Black John Licorice challenges Abigail (Numbuh Five) to [[DoesThisRemindYouOfAnything gulping down mugs]] of sugar. Numbuh Five's sugar level becomes so high that her eyes widen and she begins to shake violently.
* IdiosyncraticEpisodeNaming: "Operation: S.O.M.E.T.H.I.N.G. -- '''S'''tring '''O'''f '''M'''eticulously '''E'''ncoded '''T'''ext '''H'''andily '''I'''ncludes '''N'''aming '''G'''ag"
* IdiosyncraticWipes: [[http://photobucket.com/albums/v494/codemodule/misc/transitions/ Some examples]].
* ImAHumanitarian: The "School-yard bully" in "Operation: Z.O.O.". (Oddly enough, the same character appears later in "Operation: P.O.P., as the bouncer in Lime Ricky's, a GoodGuyBar, and seems harmless.)
* IndyHatRoll: One of the many trademark Indy moves executed by Numbuh Five. Complete with reaching back for her fallen hat in "Operation: L.I.C.E." [[spoiler:-- although this time it's a trap from the DCFDTL: this is not her hat]].
* InMediasRes: Many an episode.
* InstantArmor: Evil teenagers use Battle Ready Armor [[FunWithAcronyms (or B.R.A.s)]] to fight the KND.
* InsultedAwake: Happens to Nigel Uno a lot, including (but not limited to) getting overcharged at a restaurant, while on a date with Lizzie.
* {{Irony}}:
** The biggest obstacle to Professor XXX-L's goal to perfect the snowcone is the fact that he suffers from ice cream headaches very easily.
** An even bigger example of irony happened in "Operation: T.E.E.T.H.", the first episode featuring Knightbrace. He had attempted to become a dentist, but flunked out of school for forcing braces on people who didn't need them; he almost defeated Sector V in their first battle, but was defeated because they were helped by a ''licensed'' dentist -- who was up to then their main suspect. Oh, and Knightbrace being [[spoiler:the reluctant owner of a candy shop]].
* IWantMyMommy: When [[spoiler:Chad detached the Moonbase and sent it towards the sun]], Numbuh 86 ordered her subordinates to implement "Plan M-11", which consisted of running around screaming for mommy.
* IWasToldThereWouldBeCake: Seven of the episodes feature the KND trying to take the cake from the Delightful Children from Down the Lane, who refuse to share it with anyone. To make it worse, said DCFDTL brag and boast about it, giving the KND justification. The cakes seem to vary, in both appearance and what happens to it (as in destroyed).
** To start, the first one (used in "Operation: C.A.K.E.D." is a normal one. It is [[spoiler:destroyed by accident]].
** The second one ("Operation: C.A.K.E.D.-T.W.O.") is semi-sentient, and attacks the KND. It is [[spoiler:destroyed and split into a ton of drops when Lizzie flew in to save Numbuh One. Everyone but the DCFDTL got a bit]].
** The third cake ("Operation: C.A.K.E.D.-T.H.R.E.E.") is a normal one, but bigger than the last one. It isn't destroyed per se, but [[spoiler:it is soiled by Numbuh One's pet chicks doing their business, thus ruining the KND's mission]]. [[NauseaFuel However, it also ruined The Delightful Children's plans, as they ate it!]][[invoked]]
** The fourth cake ("Operation: C.A.K.E.D.-F.O.U.R.") [[spoiler:isn't really made, but it is a good thing, this time, because this year's competition is a trap by [[BigBad Father]] to mix in [[ImAHumanitarian the kid competitors]] into the cake. Ruined by Numbuh Two, however, spilling the cake batter, [[FriendOrIdolDecision and ruining his chances at winning the competition this year]].]]
** The fifth one... ("Operation: C.A.K.E.D.-F.I.V.E.") [[spoiler:well, three words. [[Franchise/StarWars Death Star-sized]]. It functions both as an ice cream cake and as a battle station that would destroy all the ice cream on Earth. It is destroyed when one of the ships is shot down, cutting the cake in half.]]
** The sixth one ("Operation: [[spoiler:S.I.X.]]") is a doozy, [[spoiler:because it pulls a [[{{Pun}} delicious]] irony -- the KND delivers the cake to them.]] Unknown if the KND retaliates or if the cake is destroyed. Probably not destroyed, because in "Operation: I.N.T.E.R.V.I.E.W.S.", [[spoiler:Numbuh Two said that they brought the cake back in one piece... once, but that did not stop Numbuh 74.329 from Pulling Sector V out of the Cake stealing mission and giving the case to Sector W.]]
** The seventh one ("Operation: I.N.T.E.R.V.I.E.W.S.") [[spoiler:is almost taken by Sector V, but the DCFDTL gets away. Unfortunately, it is stolen by another operative, who put up a scavenger hunt to see who gets the cake. Numbuh One wins, but it turns out [[TheCakeIsALie it is a cupcake]]. It is destroyed when the operative who stole it ate it. It turns out the scavenger hunt was a test for Numbuh One to see if he was ready to join the Galactic KND.]]
** In "Operation: E.L.E.C.T.I.O.N.S.", the DCFDTL became President of the Student Council by promising a slice of their cake to the officer in charge of counting the votes. After the election, they [[{{Jerkass}} imprisoned him instead of keeping their word]].
* {{Jerkass}}:
** Numbuh 86 can be one sometimes (to boys at least), but we can also count her as a JerkWithAHeartOfGold.
** Numbuh 363, however, [[GoodIsNotNice is notably lacking in the "heart of gold" department.]]
* {{Jetpack}}:
** Numbuh One has Jet shoes, as do most of his teammates of Sector V, and they have very good use throughout the series.
** Likewise, Both Numbuh One and Numbuh Five also have a jetpack.
* KangarooCourt: [[spoiler:Parodied to a [[RuleOfDrama dramatic degree]] in "Operation: E.L.E.C.T.I.O.N.S.", as the DCFDTL are the judges. No witnesses, no jury, and a defense that didn't get a single shot at defending Numbuh One.]]
* KentBrockmanNews: Several episodes that feature public events had Nick and Chip, two pre-teen reporters providing annoying, pointlessly judgmental commentary which even got under the good guys' skin after a while. Their voices were [[NoCelebritiesWereHarmed satires of Howard Cosell and Harry Carey.]]
* KidsVersusAdults Kids: And how.
* KryptoniteFactor: As seen is "Operation: I.T.", broccoli has a Kryptonite-like effect on kids.
* LadyLand: "Operation: F.U.T.U.R.E."
* LargeHam: Grandfather IS one.
* LaserGuidedAmnesia: When a KND Operative turns 13, they [[spoiler:usually]] are forced to retire from the Kids Next Door and have their memories erased so they can't give away KND secrets to the enemy.
* LatexPerfection: Pretty much the game plan for The Interesting Twins from Beneath the Mountain. They're able to change disguises when needed, without anyone knowing. They get foiled, however, because the Japanese KND ''and'' Sector V know about it and aren't fooled. [[spoiler:In the first episode they appear in, it turns out that the KND foil them with a BatmanGambit by disguising as Numbuh Three's grandmother, by playing the very same trope. Same goes to the Japanese KND, who also played this trope to ALSO foil the Interesting Twins' plan.]]
* LeaderWannabe: Numbuh Four wants to be the leader of Sector V.
* LethalChef:
** [[RecurringCharacter Villain]] [[PunnyName Grandma Stuffem]] has this as a literal power.
** Lizzie is a more usual example of the trope. When Nigel is sick, she makes him her special "Chicken banana-fritter soup". With "extra curly fries". Nigel uses the soup as an explosive later on. Her pie in "Operation: H.O.L.I.D.A.Y." is so gross, it makes '''[[BigEater Numbuh]] [[ExtremeOmnivore Two]]''' pass out when he accidentally swallows just a slice.
* LittleMissBadass: Played straight with Numbuh Three and possible Numbuh 86, but subverted with more or less all the other girls in the ''Kids Next Door'' (especially Numbuh Five and Numbuh 362) who for the most part are, well, still badass, but don't seem to be intentionally intended to be cute or especially effeminate in any way. Instead they tend to have some what androgynous dress senses (really especially Numbuh Five and Numbuh 362) and personalities to match.
* LimitedWardrobe: Subverted with further seasons as the team gets a variety of gear in addition to pajamas and swimsuits. [[http://knd.wikia.com/wiki/Numbuh_3 Numbuh Three has the most varied wardrobe.]]
* LoadsAndLoadsOfCharacters: After Season 3 and 4 start rolling around, there is ''a lot'' of minor operatives and villains to keep track of.
* LogicBomb: How Numbuh Four defeats the robots in "Operation: S.A.F.E.T.Y.", by making the main robot to realize that he and the other robots aren't making the world safe for kids since the robots themselves are potentially dangerous. Since the robots' main directive is making the world safe for children, they self-destruct when recognizing themselves as another threat. That, and Numbuh Four did a perfectly good WoundedGazelleGambit on them by tricking a Safety Robot into thinking it accidently hurt his little brother.
* LostTheTVRemote: The plot for "Operation: C.O.U.C.H.".
* LotusEaterMachine: Chester's headband. Consistent with the series, it sends Nigel to a fake [[VideoGame/KingdomHearts Destiny Islands]], where an {{Expy}} of Kairi greets him and shows him around the paradise they have without adults. Nigel grows suspicious, but his "comrades" reassure him that he's just being paranoid, until he remembers that [[AGlitchInTheMatrix Numbuh Four can't swim, but he's doing the backstroke in a pool of soda.]] [[spoiler:In the end, [[HoistByHisOwnPetard Nigel puts Chester in his own headband]], convincing him he'd defeated him and was being praised by the other villains... that is, until Numbuh Four turns it to its nightmare setting.]]
* LovedINotHonorMore: Comes up for Nigel and Lizzie in "Operation: G.I.R.L.F.R.I.E.N.D.".
* LovelyAngels: Numbuhs Three and Five are a PG-Rated version in "Operation: H.O.M.E.", the first (and unfortunately) only story to exclusively feature the girl members of Sector V.
* LoveMakesYouEvil: Jimmy [=McGarfield=] in "Operation: S.N.O.W.I.N.G.".
* LowerDeckEpisode: "Operation: T.R.A.I.N.I.N.G."
* LukeIAmYourFather:
** Nigel finding out [[spoiler:his father, uncle and grandfather are Numbuh Zero, Father, and Grandfather respectively]] in the movie. Nice hat trick.
** Added bonus reveal from the CN comic book: [[spoiler:The Toilenator is Wally's uncle.]] The story was written by Mr. Warburton, it must be canon.
[[/folder]]

[[folder:M-R]]
* MadeForTvMovie: ''WesternAnimation/OperationZERO''
* MadScientist:
** Mushi Sanban in "Operation: S.P.A.N.K.E.N.S.T.I.N.E.".
** Basically a lot of KND Operatives.
** And several villains too, like Professor XXX-L or Chester.
* MagicSkirt: Kuki's wedding dress in "Operation: B.E.A.C.H.", when King Sandy [[UnwillingSuspension hangs her upside down by her feet]].
* MakeOutPoint: Doubly subverted. Although there is implication in another episode that The Point does live up to its name.
* TheManBehindTheMan: Father
* ManChild: A good number of the villains, pretty ironically.
* MayTheFarceBeWithYou
* MeaningfulName:
** All of Sector V:
*** Numbuh One is Nigel Uno -- "uno" is Spanish for "one", since he is the leader.
*** Numbuh Two is Hoagie P. Gilligan, Jr. -- appropriately enough, a twofer reference: Bob Denver's character ''Gilligan'' was second-in-command of the S.S. Minnow on ''Series/GilligansIsland''; the ''Jr.'' generational suffix means that Numbuh Two is the second male in the Gilligan family to be named "Hoagie P. Gilligan".
*** Numbuh Three is Kuki Sanban -- "sanban" is Japanese for "number three", and "Kuki" is a reference to Numbuh Three being a {{Cloudcuckoolander}}.
*** Numbuh Four is Wallabee Beetles -- there were four members of Music/TheBeatles, even though Numbuh Four is Australian (as implied by his accent and the name Wallabee [wallaby]), not from Liverpool; plus, the number four is considered bad luck in [[FourIsDeath Chinese and Japanese culture]] (similar to the number 13 in Western culture), and Numbuh Four has [[ButtMonkey the worst luck of all the Sector V operatives.]]
*** Numbuh Five is Abigail Lincoln -- has the same initials as U.S. President Abraham Lincoln, who is on the five-dollar bill in American currency.
** Also, Numbuh Three's father is named Kani -- Japanese for "crab" -- which is pretty much [[GrumpyBear his entire personality]], and Numbuh Three has a little sister named Mushi, which is Japanese for "bug" and matches [[AnnoyingYoungerSibling her irritating personality]].
** Heck, pretty much all the Operatives' Codenames are a pun on their profession.
*** Numbuh 30C, whose name was a clue as to the villain of the episode. [[spoiler:It's 86 degrees F.]]
*** Numbuh 86, whose original job in her debut episode was decommissioning -- or ''86ing'' -- teenaged operatives; plus, her real name is Fanny (short for Frances), seeing as she is an [[{{Jerkass}} ass]] (or a [[CountryMatters cunt]], if you want to use the vulgar definition of "fanny" as heard in the United Kingdom).
*** Numbuh Change-for-a-20 runs the KND moonbase cafeteria cash register.
** Numbuh Four's brother is named Joey, which is a term for a baby kangaroo, another reference to his family's Australian background.
** Father's real name is Benedict, as in Benedict Arnold... he's not really a traitor, though, so much as [[spoiler:a coward who didn't want to stand up to his own father, Grandfather, and ended up siding with him out of fear of retribution.]]
** Even Tommy Gilligan, who is a parody of {{Sixth Ranger}}s in the series, shares his first name with the TropeNamer, Tommy Oliver, the [[Series/MightyMorphinPowerRangers Green Mighty Morphin Power Ranger]].
* MediumBlending: "Operation: I.N.T.E.R.V.I.E.W.S.", where the interviews with the adult Sector V is done in live-action.
* MediumShiftGag: In "Operation: C.L.U.E.S.", the flashback/ImagineSpot of [[spoiler:Mushi stabbing the Rainbow Monkey]] is a live-action sequence of an overweight man dressed as Mushi.
* MirrorUniverse: "Operation: P.O.O.L."
* MisplacedSorrow: Numbuh Three is about to be married to King Sandy, a kid pretending to be a king. Numbuh Four claims that the only reason he wanted to rescue her isn't because he's jealous, but because she owed him a quarter.
* MobileSuitHuman: Margie uses one in "Operation: F.U.T.U.R.E.".
* MobySchtick: "Operation: D.U.C.K.Y." is a WholePlotReference version, while "Operation: A.F.L.O.A.T." employs it secondhand by way of ''Jaws''.
* TheMole: In "Operation: M.A.U.R.I.C.E.", [[spoiler:Maurice -- a mole himself -- reveals that a few special and loyal operatives still help the KND after their "decommissioning" and into their teen and adult years. Ironically, Chad was also one of these and he doesn't reveal it until the penultimate episode of the series.]]
* MonsterProgenitor: Miss Thompson was the Queen were-dog responsible for turning her students into were-dogs.
* MoodWhiplash: Especially the later episodes.
* MoonLandingHoax: "Operation: M.O.O.N." starts with Sector V watching footage from the 1969 landing and laughing about how KND had managed to fool the Apollo 11 crew into thinking that they had landed on the moon, to stop them finding their secret moon base. They then learn that for the anniversary, a family is going to be sent to the moon, and it happens to be Numbuh Four's family. They build a huge fake stage and control everything behind the scenes like ''Film/TheTrumanShow'' in order to convince Numbuh Four's family that they actually had flown to the moon, lived there for a while, and came back to Earth.
* TheMovie: ''WesternAnimation/OperationZERO''
* MusicalEpisode:
** "Operation: L.O.V.E.", doubling as a spoof of ''Theatre/WestSideStory''.
** "Operation: N.U.G.G.E.T."
** "Operation: F.O.O.D.F.I.T.E."
** "Operation: S.P.I.N.A.C.H."
* MyLittlePanzer: The Boyfriend Helmet.
* NakedPeopleAreFunny: The "Nude Rocket".
* {{Narm}}:
** In-universe example: Numbuh Four busts out laughing in "Operation: F.O.U.N.T.A.I.N." [[spoiler:when Leona threatens to kill him and his friends, because of her horrible lisp.]]
** Otherwise, this becomes egregious in "Operation: M.A.U.R.I.C.E.", with Numbuh Five having chicken pox.
* NaughtyIsGood: The perfectly well-behaved Delightful Children from Down the Lane are villains; the heroes are rebellious, mischievous, and disobedient but, well-meaning such that they fight for the rights of kids everywhere. However, they are only well-behaved with good adults--it's the ones that hate kids with sheer malice the heroes have a problem with, so their behavior isn't entirely unjustified.
* NegatedMomentOfAwesome: The Cyclocannon. Right after Sector V finishes morphing their bikes and counting down from five, Tommy shows up and [[NiceJobBreakingItHero does what he does best]], crashing right through it with his bike and destroying it.
* NeverBareHeaded:
** One of the Delighful Children (Lenny) never takes off his football helmet, except in "Operation: U.N.D.E.R.C.O.V.E.R.".
** It's quite rare to see Numbuh Five (Abigail) without her red cap.
* NiceHat: Numbuh Five never removes her hat, except occasionally to use it as a weapon or as a tool. She has good reason for this; the original one was given to her by Cree before her FaceHeelTurn. Numbuh Five lost the original hat in "Operation: L.I.C.E." and replaced it with an identical one; this issue was not addressed again, even after the later episode where it was explained how Cree gave her the original one.
* NiceJobBreakingItHero:
** One by both Gilligan brothers. Early on, Tommy sticks one of Father's boogers in the decommissioning machine to count him as a member of the KND and turn his transforming ray on him. [[ChekhovsGun Later,]] during a tag game to decide who will take 362's place, [[spoiler:Numbuh Two is rushing to find somebody to tag in the last few seconds, and he tags the first person he finds on the other side of the door he opens. [[OhCrap Tag,]] [[BigBad Father,]] [[OhCrap you're it]]!]]
** The end of "No P in the Ool", where Numbuh One tries to hijack Mr. Fink and Mr. Fib's chair machine, only to accidentally activate the drill on it, which subsequently drains the pool, meaning neither side wins.
* NightOfTheLivingMooks:
** "Operation: U.N.C.O.O.L.", with pasty-white-skinned ''nerd'' zombies.
** This is practically Grandfather's modus operandi.
* NobleShoplifter: This happens when Numbuh Two has to go to the grocery store, but it's already closed. He picks up the items he needs and leaves money behind, but still gets accused of trying to steal.
* NoCelebritiesWereHarmed:
** Dr. Lincoln is an {{Expy}} of Bill Cosby.
** Robin Food's sidekick is pretty much Sammy Davis Jr.
** Count Spankulot is modeled after Bela Lugosi's {{Dracula}}.
** Numbuh 10-speed, leader of the KND Central Bike Hub, is a kid version of Lance Armstrong.
* NoDialogueEpisode: "Operation: T.H.E.-F.L.Y."
* NonLethalWarfare
* NoodleIncident: Numbuh Five refuses to assume leadership of the team [[spoiler:until the series finale]] due to something that happened in the past, and will not say why. Numbuh 86 knows why, and will not mention the reason either, merely stating that she understands. [[spoiler:It may have had something to do with her mistake that cost Nigel his hair, but this is only an assumption.]]
* NotBrainwashed: "Operation: C.O.L.L.E.G.E."
* NotHyperbole: When Cree says she'd turn the treehouse upside down, she ''means'' it.
* NotSoDifferent: [[spoiler:Numbuh One says this exact thing to the members of the DNK who revolt against Negative Numbuh Four at the end of "Operation: P.O.O.L.", and in many ways, he's right.]]
* OcularGushers:
** Numbuh Three has broken down crying, complete with OcularGushers, more than a few times during the series, usually as a way of working on another character's sympathies.
** And in "Operation: C.L.U.E.S.", it's revealed that this is a trait she shares with her father, Kani Sanban.
** Lizzy sometimes indulges in this too, usually to guilt-trip Numbuh One into going out with her.
** Toiletnator opens the gushers in "Operation: F.L.U.S.H." after being denied by the other villains.
** In "Operation: P.O.O.L.", the MirrorUniverse counterpart of Father, the series' BigBad, also does this on one occasion.
* OddlyVisibleEyebrows
* OfficialCouple: [[spoiler:3×4, 2×5, and Nigel×Lizzie temporarily. The relationships of the first two are cemented in [[SeriesFinale "Operation: I.N.T.E.R.V.I.E.W.S."]], where it is revealed that both couples eventually married.]].
* OlderAndWiser: [[spoiler:Sector V (except Numbuh One) appears as adults in the SeriesFinale. (And as the final scene shows, it's not as bad as they formerly thought it would be.)]]
* OneLetterName: Numbuh T sort of follows this trope. [[RunningGag But T is NOT a number!]] There is no Numbuh T, only [[LargeHam The Tommy!]]
* [[OperationBlank Operation: "B.L.A.N.K."]]: Complete with [[FunWithAcronyms acronyms.]] "Bland Lame Acronyms Now Kool"
* OurVampiresAreDifferent: Count Spankulot is a vampire who spanks "naughty" children and can turn others into "spank-happy" vampires [[PowerLimiter by spanking them gloveless.]]
* OurWerebeastsAreDifferent: Our Werepoodles Eat Homework.
* PaperThinDisguise:
** Numbuh 4-30teen-7. Surprisingly no clear sign of being subverted.
** Then there was the unfortunate incident (which happened off-camera) where Numbuh One bluffed his way past the Toilenator to get into the villains' secret lair with nothing more than a T-shirt with the words "I am not Numbuh One" written on it as a disguise. Told by Mr. Boss to emphasize how stupid the Toilenator is.
* PlatonicLifePartners: Numbuhs One and Five. Justified in that the former is Sector V's head and the latter is his second-in-command/right-hand woman. To a lesser extent, the members of Sector V who aren't romantically interlinked to each other.
* PortalPool: To the MirrorUniverse.
* PowerLimiter: Count Spankulot can turn others into "spank-happy vampires" by spanking them gloveless.
* PowerUpFood: One episode has a villain named Cuppa Joe, a rig overseer who gains SuperSpeed from drinking excessive amounts of coffee.
* ThePsychoRangers: The Delightful Children from Down the Lane look eerily similar to Sector V .
* {{Pun}}:
** Numbuh Two is the Patron Saint of this trope. A real PungeonMaster.
** Apparently, in one of the ''Indiana Jones'' parodies, Numbuh Five is tested about the Ice Cream flavor of the Day. Her answer? Sundae. The Ice Cream Gods must believe puns are a form of logic, because she is allowed access after she answered. Lampshaded by the Delightful Children from Down the Lane, who proceed to complain that it's the [[StupidestThingIveEverHeard stupidest thing they'd ever heard]] until it actually works.
* PunctuatedForEmphasis:
** Wally's response to his crush on Kuki:
--->'''Numbuh Four:''' She. Just. Owes. Me. A. Quarter!
** Also, Numbuh One's response to Numbuh Two's plan to steal the Delightful Children's cake with eggs:
--->'''Numbuh One:''' That! Is! BRILLIANT!
::: In the next scene, Numbuh One sees a lot of eggs in his own room.
--->'''Numbuh One:''' This! Is! STUPID!
* PungeonMaster: Numbuh Two
* PunkPunk: One of the codifiers of Kid Punk.
* RaiseHimRightThisTime: The one-off villain Mr. B, after being hit by [[HoistByHisOwnPetard his own "babyfier ray"]].
* RealityEnsues: The show averts TheGoodGuysAlwaysWin, and the KND loose almost as often as they succeed.
* ReallySevenHundredYearsOld: [[spoiler:Leaky Leona, who turns out to have been using the Fountain of Youth to maintain her 10-year-old form for the past 300 years.]]
* RebusBubble: '''2 + 2 = Pizza'''
* RedOniBlueOni: Two groups.
** Numbuhs One and Five.
** Numbuhs Four and Two.
* RidiculouslyCuteCritter:
** Bradley (a.k.a. Numbuh Six).
** The treehouse hamsters.
* RuleOfCool: This show thrives on it. They have a ''moon base'' and it looks to be made out of ''gum''.
* RunningGag:
** Every time Hippie-Hop (a HumongousMecha piloted by Numbuh Three) appears, it gets smashed to pieces, even the one time it does something useful.
** In "Operation: D.O.G.H.O.U.S.E.", Mrs. Thompson would always say "I probably shouldn't have said that" or "I probably shouldn't have told you that" to Numbuh Four after answering a question that he asked, regardless of the current situation.
** The kids tree-house has a tendency of being taken by VillainOfTheWeek. Lampshaded by Numbuh 1 in "Operation: N.A.U.G.H.T.Y.":
--->'''Numbuh One:''' Oh, come on! Why does everyone always take the treehouse?! WHO'S ON THE "TAKE NUMBUH 1'S PRIDE AND JOY" LIST THIS TIME?!
[[/folder]]

[[folder:S-Z]]
* SafetyWorst: Parodies by exaggeration in "Operation: S.A.F.E.T.Y.".
* SamusIsAGirl: [[spoiler:Heinrich, when we finally learn what exactly happened in Guatemala that made him angry with Numbuh Five.]]
* SassyBlackWoman: Numbuh Five and her sister, Cree.
* SavvyGuyEnergeticGirl: Numbuhs 84 ("Tactical Yoyo Specialist") and 83 ("Soda, Snacks, and Treats Officer").
* ScaryLibrarian: [[ClassicalMovieVampire Count Spankulot]]
* SecondPersonAttack: At the end of "Operation: S.P.A.C.E.", Numbuh One points his mustard gun toward one of the characters, and his blast fills the entire screen and fades to black.
* SeriousBusiness: Don't get us started... Rainbow Monkeys and cake and card collections....
* SetRightWhatOnceWentWrong: "Operation: F.U.T.U.R.E."
* SharedUniverse: With ''WesternAnimation/TheGrimAdventuresOfBillyAndMandy'', and by association with them, ''WesternAnimation/EvilConCarne''.
* ShoutOut: Loads and loads of these.
** Character-specific:
*** The antagonists, The Delightful Children from Down the Lane, seem to be based on the antagonists in co-creator Mo Willem's 1996 ''WesternAnimation/KaBlam'', sketch, ''The Off-Beats'', known as "The Populars".
*** Father appears to be based off of J. R. "Bob" Dobbs.
*** Numbuh 86 is possibly a ShoutOut to [[Film/FromRussiaWithLove Rosa Klebb]], another [[HotBlooded hot-tempered]], [[EvilRedhead red-headed]], [[DoesNotLikeMen boy-hating]] operative with a grating accent and a grudge against [[Film/JamesBond a British agent]].
*** The Tommy's costume (wide-brimmed hat, mask and cape), hammy poses and catch phrase ("I am The Tommy!") reminds of [[WesternAnimation/DarkwingDuck another animated superhero.]] Probably also a shout-out to Radio/TheShadow.
*** Two of the England KND members are a ShoutOut to the ''Series/TheAvengers'' and ''Series/DoctorWho'' respectively.
*** Numbuh 11-Teen is based off of [[http://en.wikipedia.org/wiki/Jane_Goodall Jane Goodall]].
*** Mr. Wink and Mr. Fibb are based of of [[Film/DiamondsAreForever Mr. Kidd and Mr. Wint]].
** [[Film/{{Chinatown}} "I was hungry (slap), I was thirsty (slap), I was hungry (slap), I was thirsty (slap),... I was hungry and thirsty."]]
** The Delightful Children are turned into sheep in one episode. The middle one resembles Sheep from ''WesternAnimation/SheepInTheBigCity''. Also, in "Operation: T.H.E.-F.L.Y.", one of the stuffed animals shown in Numbuh Three's room is Sheep.
** WesternAnimation/{{Dexter|sLaboratory}} appears as a balloon in a ZombieApocalypse episode.
** "Operation: H.O.M.E." gives us the origins of Rainbow Monkey Cereal. [[spoiler:"[[Film/SoylentGreen IT'S MADE FROM RAINBOW MONKEYS!]]"]]
** "Operation: R.E.P.O.R.T." does five parodies in one episode.
*** [[ArtShift Numbuh Four's version]] is a huge one to ''Anime/DragonBallZ''. At one point he blows a chewing gum bubble into his hands to make what looks like a [[KamehameHadoken Chewing Gum Kamehameha]].
** When the Dodgeball Wizard says that he's not a magician, Numbuh Four's dad says, [[Series/ArrestedDevelopment "All right, you're an illusionist then!"]]
** In "Operation: E.N.G.L.A.N.D.", one of the British KND operatives [[spoiler:(actually one of the Rowdy Hooligans from Across the Square)]] repeatedly says to Numbuh One "Nudge-nudge, wink-wink, [[Series/MontyPythonsFlyingCircus say-no-more, say-no-more!"]]
** [[http://images.cheezburger.com/completestore/2009/9/25/128983599130667789.jpg Ash Ketchum makes an appearence for one second in a crowd scene.]] [[Anime/{{Pokemon}} Yes, that one.]] [[Anime/YuGiOh Yugi, too.]]
** Numbuh One: "[[Series/BattlestarGalacticaReimagined By your command,]] Mr. President." [[spoiler:The president is a robot duplicate.]]
** When a baby makes a hole in a locked door to get to Numbuhs One and Five, he yells, [[Film/TheShining "Heeeere's Jackson!"]]
** "Operation: P.L.A.N.E.T." features a planet of Rainbow Monkeys similar to the first ''Franchise/PlanetOfTheApes''.
** One very direct ShoutOut in "Operation: G.I.R.L.F.R.I.E.N.D.":
--->'''Numbuh One:''' The Splinter cell? I thought they were just a bunch of sci-fi nerds who watch that dumb [[Series/DoctorWho doctor time-space-continuum show]].\\
'''Numbuh 362:''' Not them... and that show's awesome, by the way.
** Numbuh One's two-colored glasses in "Operation: L.O.V.E." make him look like Spider Jerusalem from ''ComicBook{{Transmetropolitan}}''.
** The Christmas special was pretty much a parody of the "Dark Phoenix Saga" from ''ComicBook/XMen''.
** And how many kids would have realized that the dude who waves from the pear tree at the end of the "Twelve Days of Christmas" attack in the ChristmasEpisode was [[Series/ThePartridgeFamily Keith Partridge?]]
** "Operation: F.U.T.U.R.E." gives us the line, [[WesternAnimation/ToyStory "More tea, Mrs. Nesbitt?"]]
** The head of security at the KND Deep Sea Science Lab is [[Literature/TwentyThousandLeaguesUnderTheSea Numbuh Twenty Thousand]].
** [[LotusEaterMachine The island in Chester's headband]] is a subtle reference to [[VideoGame/KingdomHearts the Destiny Islands.]] The design looks nothing like the Destiny Islands, but the entire island is a playground with no adults, and Nigel is greeted by a Kairi expy.
** The Spinach Inquisition are a direct homage to Creator/MelBrooks' ''Film/HistoryOfTheWorldPartI'' and a sketch in ''Series/MontyPythonsFlyingCircus''.
** "Operation: S.I.T.T.E.R." features several tall, long-legged, walking beds similar in design to a certain ''ComicStrip/LittleNemo''[='s=].
** "Operation: R.A.B.B.I.T." parodies the sacrifice scene from ''Film/IndianaJonesAndTheTempleOfDoom''.
** "Operation: S.A.F.A.R.I." parodies ''Literature/TheMostDangerousGame''.
* SickEpisode: Both "Operation: T.O.M.M.Y." and, to a lesser extent, "Operation: S.N.O.W.I.N.G.".
* SlipperySwimsuit: Numbuh One loses his trunks, resulting in an avalanche of jokes about how big his butt is.
* SmellySkunk: Numbuh Six, otherwise known as Bradley, is a skunk, and the first non-human Operative in the series. His spray is actually a plot device, as it negates Chester's mind control. His real parents also show up and play the trope straight. Bradley [[TookALevelInBadass later becomes R.O.B.O.B.R.A.D.L.E.Y.]] in "Operation: H.O.S.P.I.T.A.L." where cybernetics turn his musk into even more potent rocket-propelled stink-bombs which he uses against Cree.
* SpecialEditionTitle: "Operation: N.A.U.G.H.T.Y.", with the normally-white background turned green, snow falling over the titles, and the title decorated by Christmas lights.[[http://i15.photobucket.com/albums/a391/Numbuh4fan/Naughty/OperationNAUGHTY005_0039.jpg (see here)]]. That episode also had a teaser. Only "Operation: E.N.D.", "Operation: S.N.O.W.I.N.G.", and "Operation: K.N.O.T." had a Cold Opening before this, and those were much shorter than the one in the aformentioned episode.
* TheSpeechless / TheVoiceless: Numbuh Five was originally going to be one of these (Only fulfilled once in "Operation: T.H.E.-F.L.Y.").
* SpinningOutOfHere: The Toiletnator spins when he makes an exit... but that's because he's "flushing himself" down a toilet.
* SpotTheImposter:
** "Operation: P.R.E.S.I.D.E.N.T." [[spoiler:-- Exploited by Father. [[XanatosGambit Both the real President and the robotic duplicate work for him.]]]]
** In "Operation: P.O.O.L.", [[spoiler:Numbuh Four is clueless that Negative Numbuh One and Eizzil are not who they claim to be... But when Negative Numbuh Three shows up, he can tell she's an imposter just by looking at her. (In fact, Wally and Kuki's relationship seems to take a positive turn in this episode.)]]
* StalkerWithACrush: King Sandy becomes this to Numbuh Three; fortunately, he forgets about her in favor of Mushi. (Unfortunately, [[LoveMakesYouEvil that only makes Mushi worse...]])
* StarterVillain: Mr. Wink and Mr. Fibb
* StealthPun:
** When Father is turning KND operatives into animals, Numbuh 86 is turned into a dog. [[DontExplainTheJoke Get it? Because she's a bitch!]] Or because she was already a "scottie" before being turned into a [[http://en.wikipedia.org/wiki/Scottish_Terrier scottie]]. Although she looks more like an Irish Setter. Lampshaded by one of the agents who works under her:
--->"Well, ''THAT'' figures."
** A more complex (and probably accidental) one comes in "Operation: B.U.N.N.Y.", where one of Heinrich's henchmen attacks Numbuh Two with a machine gun that shoots lollipops. This could be a double reference to the [[http://en.wikipedia.org/wiki/Dum_Dum_Pop Dum Dum lollipop]] and the [[http://en.wikipedia.org/wiki/Expanding_bullet Dum Dum bullet]], which saw heavy use in [[TheRaj Colonial India]]. Throw in the fact that the episode was basically a WholePlotReference to ''Film/IndianaJonesAndTheTempleOfDoom'', which featured Indian Thuggees as its main antagonists...
* StepfordSmiler:
** The Delightful Children from Down the Lane
** Also [[spoiler:Numbuh Three]], as revealed in the final episodes.
* StoryArc: Througout the series there's many involved, some interconnect with one another in some seperate seasons, and all contain a good deal of continunity. They are as follows:
** Season 1: "Operation: I.-S.C.R.E.A.M.", "Operation: T.U.R.N.I.P.", "Operation: T.H.E.-F.L.Y.", and "Operation: C.A.B.L.E.-T.V." contain elements that are brought back in the season finale "Operation: G.R.O.W.-U.P.".
** Seasons 1 & 2: "Operation: T.O.M.M.Y", "Operation: C.H.A.D", "Operation: S.U.P.P.O.R.T.", "Operation: O.O.M.P.P.A.H.", "Operation: K.I.S.S.", "Operation: F.U.G.I.T.I.V.E.", and "Operation: S.P.A.C.E." set up a story that is concluded in "Operation: E.N.D.".
** Seasons 1, 2 & 3: "Operation: T.O.M.M.Y.", "Operation: C.H.A.D.", "Operation: S.U.P.P.O.R.T", "Operation: O.O.M.P.P.A.H.", "Operation: K.I.S.S." "Operation: F.U.G.I.T.I.V.E.", "Operation: S.P.A.C.E." "Operation: E.N.D.", "Operation: T.R.A.I.N.I.N.G.", "Operation: S.L.U.M.B.E.R.", and a game in the Creator/CartoonNetwork website set up "Operation: G.R.A.D.U.A.T.E.S.".
** Seasons 3, 4, & 5: "Operation: R.O.B.B.E.R.S.", "Operation: P.R.E.S.I.D.E.N.T.", and "Operation: S.N.O.W.I.N.G." set up "Operation: E.L.E.C.T.I.O.N.S.".
** Seasons 1, 2, 3, & 5: "Operation: T.O.M.M.Y.", "Operation: C.H.A.D.", "Operation: S.U.P.P.O.R.T", "Operation: O.O.M.P.P.A.H.", "Operation: K.I.S.S.", "Operation: F.U.G.I.T.I.V.E.", "Operation: S.P.A.C.E." "Operation: E.N.D.", "Operation: T.R.A.I.N.I.N.G.", "Operation: S.L.U.M.B.E.R.", and "Operation: G.R.A.D.U.A.T.E.S." set up "Operation: I.T.".
** Seasons 1, 2, 3, 5, & 6: "Operation: T.O.M.M.Y.", "Operation: C.H.A.D.", "Operation: S.U.P.P.O.R.T", Operation: O.O.M.P.P.A.H", "Operation: K.I.S.S.", "Operation: F.U.G.I.T.I.V.E.", "Operation: S.P.A.C.E", "Operation: E.N.D." "Operation: T.R.A.I.N.I.N.G.", "Operation: S.L.U.M.B.E.R.", "Operation: G.R.A.D.U.A.T.E.S.", "Operation: I.T.", and "Operation: E.N.G.L.A.N.D." set up ''WesternAnimation/OperationZERO''
** Entire Series: "Operation: C.A.K.E.D.", "Operation: C.A.M.P.", "Operation: C.A.K.E.D.-T.W.O.", "Operation: C.A.K.E.D.-T.H.R.E.E.", "Operation: H.O.S.P.I.T.A.L.", "Operation: C.A.K.E.D.-F.O.U.R.", Operation:C.A.K.E.D.-F.I.V.E., "Operation: W.H.I.T.E.H.O.U.S.E.", "Operation: M.E.S.S.A.G.E.", "Operation: S.I.X.", "Operation: G.I.R.L.F.R.I.E.N.D.", "Operation: A.M.I.S.H.", and "Operation: T.R.E.A.T.Y." set up the GrandFinale: "Operation: I.N.T.E.R.V.I.E.W.S.".
** Seasons 2, 3, 4, 5, & 6: "Operation: F.L.A.V.O.R.", "Operation: J.E.W.E.L.S.", "Operation: R.A.B.B.I.T.", "Operation: C.H.O.C.O.L.A.T.E.", and "Operation: L.I.C.O.R.I.C.E." set up "Operation: C.A.R.A.M.E.L.", which explains the "Guatemala Incident" in detail. [[spoiler:Turns out Heinrich was a girl prior to it.]]
** Most episodes of Season 6 set up the Splinter Cell plot and the [[spoiler:Galactic KND]].
* StrangeMindsThinkAlike:
** A literal example is used with the above {{Creepy Child}}ren.
** Numbuhs One and Two, having no clue what bras are, use a backronym generator on the word, and eventually conclude that it stands for "Battle Ready Armor" and is a secret Teenager armor device. After some embarrassing hijinx, TheStinger shows us that that is ''indeed'' what the Teenagers are using bras for (yes, even the boys). They even use the same backronym.
* StrawFeminist: Numbuh 86 again, though her attitude doesn't win her any points with the female members either.
* StrawHypocrite: The Vespinaccians, whose goal is to spread the glory of spinach. In truth, none of them like spinach at all, and their king only started the idea just so ''he'' doesn't have to eat it.
* StupidEvil: Many of the Delightful Children's plots fall into this trope, either due to their own incompetence or the fact that they grossly underestimate the KND's intelligence. "Operation: F.L.A.V.O.R." and "Operation: U.N.D.E.R.C.O.V.E.R." are two of the best examples.
* SuddenlyFluentInGibberish: In an episode, the kids are trying to save babies at a hospital. Numbuh Three, TheDitz, reveals that "I speak baby," and indeed she does.
* SunglassesAtNight: Numbuh One mainly, but sometimes other members of the KND as well.
* SwissCheeseSecurity: Sector V's Treehouse, unfortunately. (Ironically, Numbuh One designed the security system for it, and received an award from the Moonbase for it, because of how ''good'' it supposedly was.)
* TakeThat: This whole show is a massive TakeThat towards adulthood. Ironically, this show was made by adults.
** If you look at it, it's a take that to two things. 1) Kids who are over-dramatic about punishments (such as "no candy") and 2) Adults who thinks they they are automatically better than kids because of age, and turn away from things they see as "childish". (Such as the tie episode, where one of the few adult allies still takes himself seriously from time to time when he needs to, but knows how to have fun when he can and it doesn't sacrifice too much.)
** It's also clear from a few episodes that the writers are ''not'' big fans of ''Series/DoctorWho''. (See CoolAndUnusualPunishment above.)
* TeamRocketWins: Sometimes, this happens to [[ButtMonkey The Toilenator]], but unintentionally.
* TemporalParadox: Again, "Operation: F.U.T.U.R.E.".
* TeensAreMonsters
* TeenSuperspy: Although, strictly speaking, they are ''tween'' superspies.
* ThanksgivingEpisode: "Operation: C.L.U.E.S." (albeit an eleven-minute one).
* ThemeNaming
* ThickLineAnimation: Season 1 episodes.
* ThirdPersonPerson: Numbuh Five says she makes referring to herself in the third person cool!
* ThirteenIsUnlucky: Numbuh 13 is very unlucky, so unlucky that he's spent his entire career being foisted from one team to another because misfortune always befalls his new comrades.
* ThisCannotBe: "But that's [[BuffySpeak un-possible]]!"
* ThisIsADrill: The ending of "No P in the Ool".
* {{Threatening Shark}}s: Especially when they can get a literal kid burger via fast food drive-thrus.
* TimePassesMontage:
** "Operation: A.W.A.R.D.S." spoofs the SpinningClockHands version, where the spinning clock hands turns out to be just Numbuh Four playing with his watch.
** Numbuh Four suffers through this previously during "bring your daughter to work day" in "Operation: O.F.F.I.C.E." He waits and waits and waits... [[RuleOfFunny and the hands on his dad's clock move backwards]].
* ThoseTwoBadGuys: Mr. Wink and Mr. Fibb, parodies of ''Film/JamesBond'''s Mr. Wynt and Mr. Kidd.
* ThreeShorts: "Operation: C.A.K.E.D.", "Kenny and the Chimp in Diseasey Does it! or Chimp 'n Pox", and "No P in the OOL" the 9th aired episode (or the series premiere depending on where you look) of the series.
* TomatoSurprise:
** "Operation: H.O.S.P.I.T.A.L.": the KND guard an operative... who turns out to be a skunk.
** The movie had the Delightful Children [[spoiler:turn out to be Sector Z, a sector of KND that went missing. Father had tested a machine on them that overloaded and turn them into their current state.]]
** And of course the real kicker -- [[spoiler:Nigel's father being the original Numbuh Zero, and the brother of KND's sworn nemesis, Father, thus making Father Nigel's uncle]].
* TomboyAndGirlyGirl: Numbuhs Five and Three.
* TooDumbToLive: Numbuh Four loves eating Coco Nut Logs even though he's allergic to coconut.
* TotallyRadical: The "Little Traitor Dudes for Children's Defense" native language.
* TranquillizerDart: Used in "Operation: Z.O.O." by Mrs. Goodwall against Sector V, to put them in a "Kids Zoo".
* TravelMontage: "Operation: R.A.I.N.B.O.W.S."
* TraumaticHaircut: More often than not, at least one Kid ends up getting their hair chopped, shaved, pulled, or burned off during a mission.
** Memorable example is Abigail in "Operation: L.I.C.E.", where her hair is eaten by [[NauseaFuel giant chubby, shrieking mutant lice]].
** It's implied that Numbuh One is permanently bald as a result of being tortured by the DCFDTL.
** In "Operation: D.A.D.D.Y.", parents giving their own children horrible haircuts is treated like this.
* TreehouseOfFun: The KND operate from them all over the world and on the moon, and they're usually the largest landmark for miles.
* TroubledFetalPosition: In "Operation: I.T.", [[spoiler:Father enters this position after being threatened at broccoli-point by Rachel, a.k.a. Numbuh 362, complete with an implied hallucination of ''his'' father making him eat broccoli during ''his'' childhood. Although given what his father is like, this was probably a truly traumatic experience.]]
* TroublingUnchildlikeBehavior: The aformentioned {{Creepy Child}}ren.
* TrueCompanions: A very central theme of the series, especially applies to Nigel as no matter how busy he is he always puts his friends first.
* UnknownRival: The Toilenator is this to Numbuh Four after the events of "Operation: M.O.V.I.E.". Well, maybe Numbuh Four ''knows''; he just doesn't ''care''.
* UnnamedParent: Subverted. To the Kids Next Door, adults are the enemy, and so they don't really care what the adults are named beyond "Mom" or "Dad". All adults are either "Mr. ______" or some variation on the gimmick they use to fight the KND. The biggest villain for the majority of the series is the demonic figure known only as "Father". The one who eventually tops him is the Dracula-esque "Grandfather". Three guesses as to the nature of their relationship. In addition, quite a few of the kids' parents are named as the series goes on.
* UnreliableExpositor:
** Possibly the case in "Operation: I.N.T.E.R.V.I.E.W.S.". [[spoiler:It is revealed at the end that the adult KND were deliberately misleading Father during the interview, so it stands to reason that the parts of the story that he did not actually witness could have been untrue.]]
** In "Operation: R.E.P.O.R.T.", all five members of Sector V seem to be this. If one had to guess, Numbuh Five's version of the story was probably closest to the facts, but they were all rather farfetched.
* UnstoppableRage: Numbuh Three. Usually, she's sweeter than sugar, but make her angry enough, and she develops ScaryTeeth, FireballEyeballs, her teammates run for cover, and she becomes strong enough to beat up Mr. Boss, ''by herself''. (As she did in "Operation: M.A.C.A.R.R.O.N.I.")
* UnusuallyUninterestingSight: Sometimes averted, other times played straight.
** If the Kids Next Door are doing a HumongousMecha battle in town square for example, you will see civilians running away in terror. However, if the children are jumping into trap doors to escape class, pulling out crazy 2×4 technology in public or participating in other related craziness, expect the people around them to be either indifferent, or to bounce back quickly.
** For example, in "Operation: E.L.E.C.T.I.O.N.S.", Chad and his friend are in class, wearing their Battle Ready Armor and doing some EvilGloating complete with [[EvilLaugh dramatic laughter]]. Neither the teacher nor their classmates seem very interested in the two [[LargeHam hamtastic teenagers]] in [[VillainousCrossdresser lingerie-powered ninja gear.]] The teacher tells them to wait until after his class to talk about attacking an elementary school, but otherwise doesn't care.
* UnwillingSuspension: The villains have a fondness for tying up the heroes and dangling them upside-down, usually by their feet.
* ValleyGirl: In "Operation: P.O.O.L.", we have the opposites of the Delightful Children from Down the Lane, the Little Traitor Dudes for Children's Defense.
* VetinariJobSecurity: In "Operation: I.T.", it turns out that Numbuh 362 is the Soopreme Leader because nobody else wants the job. She is genuinely good at it, though.
* VillainousCrossdresser:
** Chad Dickson in "Operation: S.L.U.M.B.E.R.":
--->'''Chad:''' Surprised to see me?\\
'''Numbuh Three:''' Yeah, surprised to see you wearing a bra! (''she, Numbuh 12 and 23 laugh'')\\
'''Chad:''' It's not a bra! It's a [[FunWithAcronyms Battle Ready Armor]]! For disguises and stuff.\\
'''Numbuh 23:''' Whatever you say, Chaderella.
** This is actually also a RunningGag: the kids mistake bras for a new kind of weapon in "Operation: S.U.P.P.O.R.T.", [[IKnewIt which they turn out to be in fact]] at the end of the episode and in later ones.
* VillainsOutShopping: A literal example. There is a supermarket specifically for villains only. One episode features the majority of the RoguesGallery and the heroes fighting over ''a box of cereal.''
* VillainyFreeVillain: Professor XXX-L
* WakeUpGoToSchoolSaveTheWorld: Not in that particular order.
* WalkIntoCameraObstruction:
** "Operation: O.U.T.B.R.E.A.K.": A girl jumps towards Numbuh Four.
** "Operation: M.O.V.I.E.": An usher taking Numbuh Four away for sneaking into an R-rated movie.
** "Operation: T.H.E S.H.O.G.U.N.": When the cheese ninjas take away Numbuhs Two and Four, one of them obscure the camera.
** "Operation: B.R.I.E.F.": When Numbuh One first encounters Mr. White, he obscures the screen when he attacks Numbuh One.
** "Operarion: U.T.O.P.I.A.": Before Katie shows Numbuh One her home, she obscures the screen with her pink skirt.
** "Operation: H.U.G.S.": Rainbow Monkey Kong tries to grab Numbuh Four inside Sector V; his hand obscures the screen when he finally does.
** "Operation: H.O.U.N.D.": When Valerie shows her true form, Numbuh Five's hair fills the screen as she is backing away from her.
** "Operation: S.A.F.E.T.Y.": With some fat kid filling the screen after going up the sky and into the air. And twice in a row with the senator and Numbuh Four while they and Numbuh Two travel through an air vent.
* WalkThePlank: With Stickybeard and his pirates.
* WalkThroughTheCamera:
** "Operation: U.T.O.P.I.A.": Numbuh One runs away from Katie.
** "The Grim Adventures of the KND" with Billy's dad. "I wear the pants around here! ME! me, me, me!"
** "Operation: C.O.L.L.E.G.E.": The very beginning with Numbuh One drinking a shake.
* WeaksauceWeakness:
** As previously stated, Were-Dogs eat homework; however, badly done homework by poor students (like Numbuh Four) makes them sick. [[spoiler:Mrs. Thompson herself doesn't have this weakness, however, being their leader and significantly stronger. However, there is another weakness that applies only to her: she can't lie. Numbuh Four quickly finds out that the best way to learn the easiest way to fight her and the other were-dogs is to simply ''ask'' her, and it works like a charm.]]
** For Knightbrace, it's taffy, which he loves so much, he can easily be tempted and subdued with it. Very ironic, seeing as he's a would-be dentist who otherwise tries to force children to adhere to dental hygiene.
* WellIntentionedExtremist: PlayedForLaughs with Numbuh 20,000, who tends to go quite a little bit overboard.
* WeWillHaveEuthanasiaInTheFuture: A G-rated version: All KND Operatives have to be decommissioned at the age of 13, and their memories of being in the KND will erased. There are teenage operative double agents though, and evil teenagers who escaped decommissioning.
* WhamEpisode:
** In ''WesternAnimation/OperationZERO'', we find out that [[spoiler:Numbuh Zero is Numbuh One's dad, Father is Nigel's uncle and Grandfather, the BigBad of the film, is actually his GRANDFATHER!!! Not to mention that the DCFDTL are actually the missing Sector Z.]]
** In [[GrandFinale "Operation: I.N.T.E.R.V.I.E.W.S."]], we find out that [[spoiler:Numbuh One has been chosen as the best operative on the planet and is going to join the Galatic KND.]]
** Also, [[spoiler:"Operation: G.I.R.L.F.R.I.E.N.D.", which results in the destruction of Sector V's treehouse and Lizzie breaking up with Nigel.]] Wow.
* WhamLine:
** In "Operation: F.O.U.N.T.A.I.N.", Numbuh One cryptically reveals how evil the Delightful Children from Down the Lane can be.
--->'''Numbuh Five:''' [[MyGreatestFailure Because the one time Numbuh Five DIDN'T help someone who was kidnapped by The Delightful Children]], they did something that she can't ''ever'' forgive!\\
'''Numbuh Four:''' What? What'd they do that was so bad?!?\\
'''Numbuh One:''' [[NoodleIncident They made me bald.]]
** "Operation: E.N.D.":
--->'''Numbuh 86:''' This is an invitation to Numbuh 274's (''gasp'') '''''thirteenth birthday party'''''!
* WhatTheHellHero: This happens to Numbuh Four in ''two separate episodes''.
** The first time is in "Operation: M.A.T.A.D.O.R." when the rest of the team is angry at him for fighting in the Bully Fights. (The KND isn't fond of adults, but what the bullies do them -- trap them and give them KlatchianCoffee until they fly into a rage, and then fight them in a bullfight-like setting -- ''that'' crosses the line.) Numbuh Four has a HeelRealization when his own father is a victim of this cruel sport, and when he ultimately saves the day, he's forgiven.
** He isn't the second time, however, in "Operation: M.I.S.S.I.O.N." In this one, he tricks the authorities at the KND base in Antarctica into letting four dangerous villains go free -- Mr. Boss, Count Spankulot, Stickybeard, and Soccer Mom -- and then threatens them so they can compete against his dad's bowling team. All because he's sick of polishing his dad's trophy's. After everything that happened, the rest of Sector V actually sided with the four villains here, and he ''was'' punished in the end.
* WholeEpisodeFlashback: "Operation: I.N.T.E.R.V.I.E.W.S."
* WholePlotReference: "Operation: A.R.C.H.I.V.E." is, [[ViewersAreGeniuses surprisingly,]] basically the "Second Renaissance" short in ''Anime/TheAnimatrix'' with the serial numbers filed off.
* WhosLaughingNow: When The Toiletnator sinks an '''[[CrowningMomentofAwesome ENTIRE GRAND CANYON'S]]''' worth of milk and cereal using his ''[[HeartIsAnAwesomePower flushing powers]]''. [[spoiler:Unfortunately, he did it when the Operatives were about to eat said milk and cereal, and when the adults were actually planning an ambush on them. He unwittingly ruined both the adult's plans and the kid's cereal at once. Naturally, Numbuh 86 berates Numbuh One for what happened, especially letting the Toilenator get by security, because of said incident. In short, neither side wins.]]
* WildTeenParty: The Delightful Children accidentally start a TV-Y7 version of this trope by trying to kiss up to teenagers. They're forced to ask the Kids Next Door to [[SaveTheVillain help them stop the party]] before Father finds out; the KND are honor-bound to agree.
* TheWorfEffect:
** Poor, poor H.I.P.P.I.E.-H.O.P.
** Numbuh Four would also count, as he would be the first to charge in and is often the first to go down in battle.
* WorldGoneMad: It's a world where adults live to make the younger generations lives a living hell. And people get away with turning stuffed animals and pinkeye crust into food. And there's candy pirates who wreck the suburbs pretty damn often, and Father, and Grandfather, and all the villains, and... hell, and some horrible plan about to ruin the lives of children forever and yet their parents always think they're just playing... And then there's "Operation: F.U.T.U.R.E.". My God.
* WorldOfHam: You'd be hard-pressed to find a line in this show spoken at normal speed and volume.
* WoundedGazelleGambit: Part of the reason how Numbuh Four defeated the robots in "Operation: S.A.F.E.T.Y.".
* XanatosGambit:
** There's an episode where Cree's carrying out an EvilPlan to destroy Sector V but is defeated and sent to jail at the KND Moon Base. That was her true goal; to gain access to the Moon Base, but wiping out Sector V would have been good too. (She aborted ThePlan when Chad told her he already tried it [[spoiler:and he might have been ''trying'' to convince her not to try, seeing as he was a FakeDefector]], but it likely would have failed anyway; the access code that she believed she got from her sister she actually got from a dummy that Numbuh Five left as a decoy.)
** And then there's "Operation: P.R.E.S.I.D.E.N.T.". [[spoiler:Both the president and his robotic duplicate work for Father so it doesn't matter which one of them reaches City Hall.]]
* XanatosSpeedChess: When Sector V had to improvise an attack on a "Villains Awards Show" without Numbuh One's help. It involved a lot of disguises, a chunk of sneaking around, and lots of snot. Worked out, until it was revealed that Numbuh One was [[IncrediblyLamePun Kid]]-[[GambitRoulette napped]] and set up as an award, causing the plan to backfire. Thankfully, they managed to rescue him in time for the plan to work out. By simply rushing the stage and carting him away. The adults had no clue what was going on.
* XRaySparks
* [[YouAreNumberSix You Are Numbuh Six]]:
** Given additional meaning with their, uh, {{Meaningful Name}}s (see its entry above).
** The actual Numbuh Six is a skunk. No hidden meaning there, he's just a skunk. But Numbuh Six was introduced before it was revealed that Numbuh's One through Five were just a sector of a much larger KND operation. Also, Bradley the skunk isn't an official Numbuh. Numbuh One granted him honorary status after the events of "Operation: C.A.M.P." They treat the honorary designation as official, however, even coming to Bradley's aid in "Operation: H.O.S.P.I.T.A.L.".
* YouKnowWhatYouDid: "Operation: D.O.G.F.I.G.H.T."
* YouMeddlingKids: "Operation: C.A.M.P."; a angry camp counselor yells at a skunk, the one later used in the TomatoSurprise, after the KND freed a bunch of {{brainwashed}} campers.
* YouMonster: Numbuh 86 to Father, in "Operation: C.A.K.E.D.-F.I.V.E.", after the destruction of the KND ice cream storage.
* ZombieApocalypse:
** Or rather a [[ZombieApocalypse Senior Citizombie Apocalypse]] in TheMovie.
** An earlier episode also dealt with nerd zombies. [[spoiler:In that case, though, it was due to a collectible card getting stolen. Once it was returned, they changed back.]]
[[/folder]]

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end transmission.
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