History Heartwarming / CodeNameKidsNextDoor

* "Tell the Kids Next Door [[AndIMustScream we]] [[ZombieInfectee miss]] [[ResistTheBeast them!]]" -- [[spoiler:The Delightful Children From Down The Lane a.k.a. Sector Z.]] [[AlasPoorVillain They miss you too, guys.]] [[FallenHero They miss you too.]]

-->'''Numbuh Four:''' ''(comes out with an umbrella due to the sky raining Rainbow Monkeys)'' Well, I hope you're [Numbuh Three] happy!\\

-->**[[spoiler:'''Numbuh 5/Abby''':Yeah, we told him everything he wanted to hear, we'll meet you up on the Moon base okay? Oh! And Numbuh one? Welcome back.]]

-->**[[spoiler:'''Numbuh 5/Abby''':Yeah, we told him everythin he wanted to hear, we'll meet you up on the Moon base okay? Oh! and Numbuh one (scene fades to black): Welcome back]]

-->"You may be my arch-enemy -- but you're also my sister!" Awww ...

* Or the the end of "Operation: V.I.R.U.S." where Cree and Abigail Lincoln share a moment of sisterly love. "You may be my arch-enemy -- but you're also my sister!" Awww ...

-->'''Numbuh Five:''' Forget it! If "Mr. Uno" wants to act like a jerk for the rest of his lfie, Numbuh Five say, "Let him!"\\

* The outcome of Operation M.A.T.A.D.O.R. Especially TheStinger.

* The very end of the series:

** Back in the interview, the live action actors have started crying at the memories. Although it quickly turns into a CrowningMomentOfFunny , the switch to live action made the mood seem all the more real.

* In Operation D.A.D.D.Y. it was revealed that Mr. Boss is Numbuh 86's father. Afterwards they admitted that they didn't really care if they were technically enemies, that they would just do their thing and still be loving father and daughter. It's both touching and funny.
** Another Numbuh 86 one: at the end of Operation S.L.U.M.B.E.R, Numbuh 3, seeing that no-one else is willing to be 86's friend due to her acting like such a {{Jerkass}} most of the time, insists that ''she'll'' be her friend anyway.
* Throughout the entire series, Abby and Cree have had fake-out Crowning Moments of Heartwarming. But in Operation V.I.R.U.S. they get to have a genuine moment of sisterly caring, no fake-out, no strings attatched.
** Speaking of the Lincoln sisters, anytime theres a flashback to Cree's time as a KND operative. It's both heartwarming and heartbreaking to see a time when she and Abby actually got along.
* Any time Numbuh 4 almost confesses to Numbuh 3.
* In the episode M.A.U.R.I.C.E, Abby goes through a bit of an identity crisis. Towards the end, with her unable to stop the chicken pox machine and two of the people she looked up to the most (Cree and Maurice) now her enemies, it appears she's about to have a StartOfDarkness and is about to accept the inevidability of her approaching teenhood as she says, "I can't fight it anymore. I just... I give up." Suddenly the machine starts exploding and her sister falls into the chicken ammo (ItMakesSenseInContext). When she looks at Maurice he's holding a marble bomb, and simple says, "Never give up."

** Particular episodes that come to mind are C.A.K.E.D.-T.W.O., P.O.O.L., S.N.O.W.I.N.G., L.E.A.D.E.R., and G.I.R.L.F.R.I.E.N.D. (despite [[spoiler: being the episode they break up]])
* "Operation Z.E.R.O": When Number 1 plans to use the Recomissioning Module to restore his father's memories of being Number Zero, he gets a holographic message from his dad saying he broke it because, even though he'd like to have more cool adventures with the team, "I'm just not a kid anymore. I'm an adult. And I need to complete the most important mission of my life -- being a good father to my son."
* Or the the end of "Operation V.I.R.U.S." where Cree and Abigail Lincoln share a moment of sisterly love. "You may be my arch-enemy -- but you're also my sister!" Awww ...
* "Operation: F.U.T.U.R.E.," "Operation: K.I.S.S.," "Operation: G.R.O.W.U.P.," and "Operation: C.A.T.S." are all also ''very'' heartwarming. This show's writers apparently ''really'' knew how to portray TrueCompanions.
* "Operation: S.A.T.U.R.N" which features a robotic Rainbow Monkey named "Ramon 4" (Short for Rainbow Monkeys 4-Ever) that was rejected by kids for being "too ugly" and was sent to outer space...so he steals all the other Rainbow Monkeys from kids. Numbah 3 (who is a BIG fan of Rainbow Monkeys) cannot believe that there is a Rainbow Monkey that nobody loves...so she hugs him showing that he is loved and he lets all the other Rainbow Monkeys go. Awww....
-> Numbuh 4: ''(comes out with an umbrella due to the sky raining Rainbow Monkeys)'' "Well, I hope you're [Numbuh 3] happy!
-> Numbuh 3: ''(Gazing at the moon)'' "I am...and so is Ramon..."
** [[EarWorm "Rainbow Monkeys. Rainbow Monkeys. Oh so very round and super chunky..."]] [[TearJerker * Sniff...* ]]
* Nigel's "son" finally deciding to trust him in "[[SecretTestOfCharacter Operation W.H.I.T.E.H.O.U.S.E.]]"
--->'''Number 1600:''' Man! How cool would it be if you really ''were'' my dad!
--->'''Nigel:''' Well, if you ''were'' my son, I'd be ''very'' proud of you.
* The scene in '''Operation G.R.O.W.U.P.''', when the team decides to get the Delightful Children's age-changing AppliedPhlebotinum to turn Number 1 back into a kid. Doubles as a CrowningMomentOfAwesome.
-->'''Number 5:''' Forget it! If "Mr. Uno" wants to act like a jerk for the rest of his lfie, Number 5 say, "Let him!"
-->'''Number 3:''' [[WhatTheHellHero Number 5, how can you be so mean?!]] You call Number 1 selfish, but you won't even help him!
-->'''Number 5:''' Number 3!... ''beat'' Attacking the Delightful Children wouldn't be easy.
-->'''Number 3:''' We don't care.
-->'''Number 5:''' We don't even have any of our 2x4 technology weapons.
-->'''Number 2:''' We'll come up with something.
-->'''Number 5:''' We may be [[FateWorseThanDeath turned into adults]] ''ourselves''.
-->'''Number 4:''' No one's a kid forever.
-->'''Number 5:''' All right, then -- Kids Next Door, ''Battle Stations!''

* The moment in C.A.T.S. when, after an entire episode of refusing to say it, Numbuh Four tells Numbuh Three he loves her. Then he goes back to being completely unable to spit it out, but still.
* In F.O.U.N.T.A.I.N, after Leona turns on the kids, tries to de-age them into non-existance, and is about to fall to her death:
--->'''Numbuh Four:''' I thought you saw we came to save Leona.
--->'''Numbuh Five:''' *trying to walk away* Change in plans. She's an adult and a jerk.
--->'''Numbuh Four:''' *grabs her hand* But she wants to be a kid. A big kid once told me we save kids, that's our job.
--->'''Numbuh Five:''' ... Kids Next Door... Battle Stations!
** Made especially more heartwarming since for a good chunk of the episode Wally was the one who wanted to give up on Leona and Abby wouldn't let him. (in fact it's Abby's words that he is recalling in the above quote)
* Operation C.A.R.A.M.E.L. Given all the horrible things that Heinrich has done to Abby (in past episodes, and the stuff he probably did that wasn't shown), Abby still tries to help him and tell him how to reverse the affects of the caramels.
--->'''Abby:''' Heinrich, just share it with me. I promise, it will all be okay
--->'''Heinrich:''' *tearing up* WHY SHOULD I BELIEVE YOU?!
--->'''Abby:''' Because... you're more important to me than candy.

* During Operation P.O.O.L, when Numbuh Four's friends get switched with negative doppelgangers from another universe, Numbuh Four only manages to figure it out by looking into Numbuh Three's eyes, which are filled with cruelty that the real Numbuh Three does not possess. Ergo, they must be from a negative universe, he figured that out by ''being a friend!'' It's incredibly cheesy, but still sweet.
* Operation O.O.M.P.A.H. As Monty's first appearance, there's plenty of these.
--->'''Nigel:''' I'm sorry Dad.
--->'''Monty:''' That's okay son, you did your best. And according to the Dad's Do's-and-Don't section of the paper, that's all that matters.
** Monty himself is also heartwarming when you consider the type of father he had. He literally has had no good father figure, but he still tries to be the best father to Nigel that he can be (reading articles on how to be a father, trying to spend quality time with him, ect.). Seriously, he could've easily turned out like his brother.
* Moose's sacrifice in Operation K.N.O.T.
-->'''Numbuh Four:''' Numbuh One, who was that guy?
-->'''Numbuh One:''' A comrade...
* Throughout the entirety of the episode D.O.G.H.O.U.S.E, Abby tries to deal with the problem of the episode herself, and is even seen crying during the episode. When Wally tries to help, she keeps pushing him away. Finally, when he finds her at the bottom of the steps of the haunted doghouse:

'''Wally:''' No way, my homework's in there! Along with whoever did this to you. Come on, you and me can-\\
'''Abby:''' *voice breaking* I said go home! Numbuh Five can handle this herself...\\

'''Abby:''' Number Four! .... *looks up with teary eyes* Help....\\
'''Wally:''' *smiles*
** Pratically all interactions between Abby and Wally in the episode count as this.LikeBrotherAndSister was in full effect here.
* In Operation P.A.R.T.Y., it's about the only time the Delightful Children seem genuinely grateful for the Kids Next Door's help, but it's still nice to see.

* "Tell the Kids Next Door [[AndIMustScream we]] [[ZombieInfectee miss]] [[ResistTheBeast them!]]" - [[spoiler:The Delightful Children From Down The Lane AKA Sector Z.]] [[AlasPoorVillain They miss you too, guys.]] [[FallenHero They miss you too.]]
* In Operation Z.E.R.O, after [[spoiler: Sector Z is brought back and told that the effects of the recommissioning module are only temporary]] the girl with pigtails looks incredibly sad. The African-American guy puts his hand on her shoulder and she reaches up and puts her hand on his hand. It's very brief, but very cute in a [[TearJerker sad]] sort of way.
* Operatio B.U.T.T.: Not only Wally is visibly sad for Numbuh One [[TenMinuteRetirement leaving the team]] (to the point of [[ManlyTears crying]]), but when he sees how upset Kuki is, he tries his best to cheer her up using her stuffed animals and making sweet voices, even if he HATES them.
* "Welcome home, Number One." Stay young.

* To say nothing of the good-bye scene in "Operation I.N.T.E.R.V.I.E.W.S."

* Operatio B.U.T.T.: Not only Wally is visibly sad for Numbuh One [[TenMinuteRetirement leaving the team]] (to the point of [[ManlyTears crying]]), but when he sees how upset Kuki is, he tries his best to cheer her up using her stuffed animals and making sweet voices, even if he HATES them.

* In Operation Z.E.R.O, after [[spoiler: Sector Z is brought back and told that the effects of the recommissioning module are only temporary]] the girl with pigtails looks incrdibly sad. The African-American guy puts his hand on her shoulder and she reaches up and puts her hand on his hand. It's very brief, but very cute in a [[TearJerker sad]] sort of way.
* Operatio B.U.T.T.:not only Wally is visibly sad for Numbuh One [[TenMinuteRetirement leaving the team]](to the point of [[ManlyTears crying]])but when he sees how upset Kuki is,he tries his best to cheer her up using her stuffed animals and making sweet voices,even if he HATES them.

** I'm not sure if I would call this heartwarming, but I certainly thought it was sweet in the LICORICE episode when Abby and Stickybeard (who are usually at odds) team up to save Heinrich, and then at the end Heinrich has a brief moment of gratitude.

* During Operation P.O.O.L, whenever someone knew a doppleganger by looking into their eyes. It's incredibly cheesy, but still sweet.

* "Operation: F.U.T.U.R.E.," "Operation: K.I.S.S.," "Operation: G.R.O.W.U.P.," and "Operation: C.A.T.S." are all also ''very'' heartwarming. This show's writers apparently ''really'' knew how to portray a {{Nakama}}.

--->'''Wally:''' Numbuh Five, are you okay?!
--->'''Abby:''' Numbuh Four, what are you doing here? Go back to the treehouse!
--->'''Wally:''' No way, my homework's in there! Along with whoever did this to you. Come on, you and me can-
--->'''Abby:''' *voice breaking* I said go home! Numbuh Five can handle this herself...
--->'''Wally:''' I know you can. But two of us can handle it better.
--->'''Abby:''' Number Four! .... *looks up with teary eyes* Help....
--->'''Wally:''' *smiles*

* Decommissioning may be scary, especially in context of the show, but think of it this way: these kids sign up knowing that they will lose all memory of a considerable chunk of their childhood, all of their [[CrowningMomentOfAwesome adventures]] and [[{{Nakama}} friends]], in order to protect the right of other children to, well, be kids. A HeroicSacrifice indeed.

* Decommissioning may be HighOctaneNightmareFuel, especially in context of the show, but think of it this way: these kids sign up knowing that they will lose all memory of a considerable chunk of their childhood, all of their [[CrowningMomentOfAwesome adventures]] and [[{{Nakama}} friends]], in order to protect the right of other children to, well, be kids. A HeroicSacrifice indeed.

* In Operation Z.E.R.O, after [[spoiler: Sector Z is brought back and told that the effects of the recommissioning module are only temporary]] the girl with pigtails looks incrdibly sad. The African-American guy puts his hand on her shoulder and she reaches up and puts her hand on his hand. It's very brief, but very cute in a [[TearJerker sad]] sort of way.

* In Operation Z.E.R.O, after [[spoiler: Sector Z is brought back and told that the effects of the recommissioning module are only temporary]] the girl with pigtails looks incrdibly sad. The African-American guy puts his hand on her shoulder and she reaches up and put her hand on his hand. It's very brief, but very cute in a [[TearJerker sad]] sort of way.

* "Tell the Kids Next Door [[AndIMustScream we]] [[ZombieInfectee miss]] [[ResistTheBeast them!]]" - [[spoiler:The Delightful Children From Down The Lane AKA Sector Z.]] [[AlasPoorVillain They miss you too, guys.]] [[FallenHero They miss you too.]]

* Decommissioning may be HighOctaneNightmareFuel, especially in context of the show, but think of it this way: these kids sign up knowing that they will lose all memory of a considerable chunk of their childhood, all of their [[CrowningMomentOfAwesome adventures]] and [[{{Nakama}} friends]], in order to protect the right of other children to, well, be kids. A HeroicSacrifice indeed.

** When Numbuh One is saying goodbye to his parents, who were both recommissioned so that they could better understand the opportunity their son had been given. His mother is understandably weepy but supportive, but seeing the legendary try to fight back crying as he wishes his son luck is so touching.

** There are many in this episode. When Numbuh Four refuses to fight his father, when Mr. Beetles is confused about why he would ever try to hurt his son, the part where he explains how the fathers got in this situation and Numbuh Four's reaction.