Combined with Late to the Punchline; to most children, t is plainly not a number. However, fast forward to high school and algebra classes, where we learn that t is very much a number; it's just a variable. In other words: it's unreliable, like Tommy.
At first, it seems like the Delightfuls are a hive mind just for added creep factor. But Delightfulized children are supposed to be perfect little kids in the eyes of adults; what's one of the most annoying things parents complain about? Kids fighting with their siblings. By making the Delightfuls a hive mind, it guarantees they never disagree or bicker about anything!
"Operation: G.R.O.W.-U.P." feels even more brilliant when one notices Numbuh 1's Fatal Flaw: he tends to be so workaholic about being a KND officer that it's questionable if he still knows how to be a kid. Being age-ified merely amplified it. So Numbuh 5 wasn't just pointing out that "Mr. Uno" was too readily letting his age keep him from being a good guy, she was calling him out on letting his worst tendencies take the wheel.
There's a brilliant foil between the KND and the DCFDTL's names: distance. Where can you find the KND? They are "(Kids) Next Door". And where can you find the DCFDTL? Why "Down the Lane"!
"Operation: T.H.E.S.H.O.G.U.N." becomes brilliant when one takes note that the cheese ninjas make weapons out of cheese cutlery the same way real life ninjas first used farm tools for improvised weapons.
Also, it's no wonder Kevin Michael Richardson would go on to be the Shredder in the TMNT 2012 series: as the Cheese Shogun, he's good at voicing the master of a ninja clan. What's more, it's also noteworthy that the Shredder was inspired by a cheese grater.
In "Operation: T.A.P.I.O.C.A.", Numbuh 2's tendency for stretching the truth is fitting with the the Kids Next Door's philosophy of kids being free to break the rules (among other things like drinking soda, not brushing their teeth, not 'playing nice' ect.).
Of course King Sandy likes 'older women', his older cousins must've had some influence on his preference.
Before the present KND was founded by Numbuh Zero, Grandfather ruled the world. Consideringhowhe ruledthe world, the rampant distrust of the KND towards adults suddenly becomes far more justified.
For the reveal about Numbuh 0 being Numbuh 1's father. 0 is before 1, like how a father came to the world before his son.
Why is Fanny, aka Numbuh 86, the KND's resident Alpha Bitch, in charge of decommission? Because anyone doing this job is destined to become the most disliked and feared of all agents; basically, the decommissioner is a non-lethal equivalent of an executioner that finishes the other agents' careers and destroys their memories. So, obviously, nobody would take this job unless he/she is already universally disliked by the other agents and therefore this position makes little difference in Fanny's relations with the rest of the organization.
Considering this, it also suddenly makes sense that Fanny, as shown in flashbacks, was a medical officer before getting her current position. Decommission is comparable to a medical decision that isn't necessarily nice or likable yet it's important and therefore must be done despite personal interests being compromised, as it happens whenever Fanny has to decommission any agent she actually respects or likes, yet she does her job for the KND's general sake, just like a doctor at times has to amputate a patient's toe or even a whole leg in order to save the rest of the body.
Along with the fact that to "86 something" means to remove. Which, in this case, are memories.
This is one for Doctor Who fans: We first hear of Doctor Time-Space Continuum in the 2004 episode "Operation: U.N.C.O.O.L.", with the kids watching what's likely a fictional counterpart to the Classic Series, which, given the KND's disdain for "old" and "nerdy" things, can explain why they're not really having fun. The next time we hear of the show again is in 2007 ("Operation: G.I.R.L.F.R.I.E.N.D."), during the height of the David Tennant era. Which might be why Numbuh 362's taken a liking to it.
During the first season of Codename: Kids Next Door, having the Delightful Children show up in every episode like some sort of Mandatory Line (i.e. forced and seemingly irrelevant) might have been intentionally grating, to get the audience jaded enough to them showing up so that by the time they did do something important (picking up the age changer), no one would suspect it was a Chekhov's Gun. (This was before the audience was aware of how tight the show's continuity would be.)
For some, the reveal about Chad's true allegiance to the KND and not the teens might come out of nowhere. But consider this, why didn't Chad just avoid any interaction with Nigel so that he would have an easier time trying to launch the Moonbase into the sun without being detected until it was too late, hanging the KND out to dry? Because that wasn't what he actually wanted; it's implied that it was both a means to "prove" his loyalty to the teens and a gambit to make sure Cree wouldn't do the same, since in a cartoon if a scheme failed once then it is usually abandoned.
And, according to the comics published by Cartoon Network, the same guy put a setting on the decommissioner so it would erase the memories of the person who pulled the switch. How is that a good idea? Go over the circumstances of Operation: E.N.D., but with a rogue teenage ex-operative instead of Numbuh 86. Imagine if one KND operative managed to put it on that setting without the teenager noticing. It may also be a way for Numbuh 86 to decommission herself when she turns 13, since at that point her fellow operatives might not have the nerve to decommission her themselves.
Father's Villain Decay makes more sense when you remember how his debut episode went: he initially appeared as this dark, badass manipulator. Then the KND beat him by throwing ice cream at him. He simply started to lose confidence in himself as a villain after his first defeat. It helps that in Operation: Z.E.R.O., it was implied during a moment of raw anger that he was capable of scaring Grandfather of all people.
DCFDTL's often downright ridiculous levels of incompetence and stupidity up to Too Dumb to Live levels becomes a case of great Fridge Brilliance when it's revealed who they REALLY are the brainwashed KND team sector Z. Possibly the reason they are so incompetent and stupid sometimes is that they are holding back because they are actively and/or subconsciously fighting their brainwashing!
How did Mr. Boss know that girls would be incredibly attracted to Rainbow Monkeys? Well he has a daughter (Numbuh 86) who, according to Numbuh 1, has even more Rainbow Monkeys than Numbuh 3.
How did Gramma Stuffum become the cook for Gallagher Elementary's Cafeteria? Well, remember when we found out that James Nixon McGarfield worked for Father and made elementary school hell for the rest of the children? Father and McGarfield probably hired Gramma Stuffum to be the Cafeteria Cook so even lunchtime wouldn't be fun, and it worked (except for Numbuh 2).
Why are there so many Living Prop villains? Remember that the main five characters are but one sector in a global organization. The bad guys we never meet are probably the enemies of other sectors. Of course, Word of God is that the real reason is because they didn't have enough villains to fill the movie theater in Operation: M.O.V.I.E., but still...
A lot of people say Chad Took a Level in Jerkass when he became The Mole. Well, would you be so jolly if you had to fight so many of your former comrades all the time? It also crosses into Heartwarming in Hindsight when you realize: Chad is basically allowing his former name as a KND legend to go up in flames, and willing to go down in KND history as a traitor, just to give them the edge against the villains.
The constant exaggeration of "all the kids in the world" villains use seems a little less silly when you know that all 7 billion people on Earth could comfortably fit in Texas with the population density of New York.
One might expect the KND to refer to themselves by their actual names instead of their numbers when they're off-duty, seeing as they're so close. But then again, they are still 10 years old. So they probably love calling each other by their really cool codenames.
It's a little strange that the KND computer immediately came up with "Battle Ready Armor" as an acronym for "bra". And some people might find it silly how the "crazy conspiracy" was coincidentally right. But, if you watch Operation: M.A.U.R.I.C.E., you'd see that the Kids Next Door had encountered teenagers wearing the armor before. They just didn't know that the suits themselves were bras, until Numbuh 2 submitted the information to the computer and it added it all up. Also, Teen technology could be a combination of KND and Adult technology. After all, Teens are considered the midpoint between Adult and Kid. The Acronym was probably a left over of the KND portion.
Some viewers thought Numbuh 2 was being snobbish in Operation: T.R.I.C.Y.C.L.E. when Tommy scratched his bike. But, if you read the comic prequel Operation: T.R.I.K.E., you'd see at the end that he made the bike with his Disappeared Dad. (Heavily implied to be dead in Operation: C.A.K.E.D.-F.O.U.R.) So of course he'd get defensive about it.
Considering how horribly Adulthood is viewed, it's strange how the the KND never try to fight their own aging. But then, generations of kids have different likes and dislikes. Its hard for older kids to understand what younger kids like (For example, a fan of Ed, Edd n Eddy, Robot Jones and Dexter would not understand or like Uncle Grandpa the same way a younger kid would). If the KND did not change its operatives over time, they would eventually loose the ability to understand the very kids they protect;
Chad's age. He's Numbuh 274. Here's a little math lesson: What's 2 + 7 + 4?
There's a bit of Fridge Brilliance in The Movie when it comes to Grandfather and the title Numbuh Zero. Grandfather is more or less the Anthropomorphic Personification of the fear of growing old all kids have and the negative qualities of it (thus his Rapid Aging power). On the other hand as soon as he's defeated, we find that Numbuh Zero has accepted growing up and becoming a father, reflecting Monty Uno's love of being a father and wanting to be a good one. This makes sense, once the fear of growing up has been defeated one can see the good qualities of it are worth looking forward to.
Mr. Sanban's ranting about "just wanting his daughters to be nice to each other" sound ridiculous, but wait, wasn't that the episode where we found out Mushi was Evil All Along?
When Father's interview with the adult versions of KND ended Number 5 contacted Number 1 and still has access to the Moon Base despite supposedly having only had her memories restored by Father for his interview. Why? Because when Father took over the KND as Supreme Leader, he enacted a rule where the Supreme Leader could not be decommissioned. That rule is still in place so Number 5 was never decommissioned unlike her husband.
Actually the end of the episode implies that NONE of the members of Sector V were decommissioned. When Abby/Numbuh 5 answers Numbuh 1's call, she says we (Numbuh's 2-5) told Father everything he wanted to hear, and "we'll meet you up on the Moon Base" before she welcomes him back. As she's talking in plurals, it's likely that she's referring to the whole group.
"Operation: P.L.A.N.E.T." becomes this after the discovery of the Galactic KND in the Grand Finale. A KND experiment headed by Numbuh 74.239, about reaching outside the solar system, which somehow sends the astronauts back to Earth while they blacked out? Can you say "cover-up"?
In Operation S.P.A.N.K., Numbuh 3 walks into her room and discovers Count Spankulot spanking one of her Rainbow Monkeys. In other words, she caught him "spanking the monkey."
In "Operation: GRADUATES," Tommy is shocked that Father wouldn't turn off his machine even to save his own kids: "Man... you really are evil!" True, and there seems to be nothing more to it. Until "Operation: ZERO." Of course Father wouldn't care what happens to the Delightful Children — they're not really his kids, just disposable Brainwashed and Crazy minions.
In "Operation: ZERO," Number 1 says that he and Number 2 have been "best friends since kindergarten," but we never really saw any evidence of that. (If anything, Numbers 1 and 5 — and Numbers 2 and 4 — seemed to be best friends.) But look at their good-bye in "Operation: INTERVIEWS." Although Number 1 calls each of his friends by their first name in that scene, Hoagie's the only who calls him "Nigel." The two of them are also the ones crying the most, even more than the slightly teary-eyed Numbers 3 and 5, and, unlike Number 4, not even trying to hide it.
Nigel's immunity to brain freeze, as revealed in "Operation: COLLEGE," seems like just a one-off gag that sets up the plot for the episode. However, with the reveal that Nigel is the grandson of the fire-based villain Grandfather, this immunity actually makes a lot of sense.
In hindsight, it should have been obvious that "Operation: WHITEHOUSE" was All Just a Dream, simply by having a basic knowledge of U.S. law. The Bill of No Rights for Kids would be highly unconstitutional and probably wouldn't even make it to the president in the first place, and the president can't be forced to sign anything, especially not something that would plunge the country into chaos like this. Nigel also wouldn't become president, as he's not a natural-born U.S. citizen. Now, an adult would know all this, but would a child?
The G:KND viral teaser ARG reveals a few characters to be G:KND operatives all along, including Lizzie Devine. Now Lizzie's Lethal Chef tendencies make a lot more sense: can you say "Alien Lunch?"
When the Toilenator is at the big Villain BBQ, he refuses to eat the burgers because, "Do you know what red meat does to your digestive system?". At first glace he just seems annoyingly health-conscious on top of being a nuisance to the rest of the villains, but considering the Toilenator has the power to travel through toilets and sewers, he'd prefer not to deal with clogged toilets slowing him down.
Lizzie turning out to be a plant alien operative of the Galactic Kids Next Door suddenly makes a lot of sense when you consider her involvement over the course of the series. She refers to Numbuh 63.5 by his first name, Herbie, derived from "Herb" - a kind of plant. Her booger falling into salad leaves is what prompts the nation's principals to reject a plan to mine playgrounds for salad oil. The "romantic lunch" she planned and rescued for Numbuh 1 turns out to be a single celery stick. She ends up chased by the Sector V Treehouse after it falls in love with Nigel. Her cooking is notoriously bad, and at one point she even claims that a tumbler of soup she made for Nigel is "delicious". Think about it - she wouldn't need to know how to cook edible food, because plants don't eat food like conventional Earth operatives.
The Foreshadowing even began a lot sooner than that if you know where to look, and rather blatantly. In "Operation L.U.N.C.H.", Lizzie's locker is a combat-capable robot ready and active for any moment, and it has a K.N.D. name classification like how Robo-Bradley got one. There's also "Operation P.O.O.L.", where she was part of the Destructively Nefarious Kids group as an explicit operative - what seemed like a coincidental or perhaps strange reversal turned out to be one of the biggest hints there was. The fact that this "evil" Lizzie was the first to commit to a HeelFace Turn to readily rebel against Opposite Numbah Four could even be debated to fall in line with the fact that as a Galactic Kids Next Door operative, she can see the much bigger picture than anyone else in the cast, and actually changed the least of all the cast members.
At the end of Operation I.N.T.E.R.V.I.E.W.S., Numbuh 5 claims that she told Father everything he wanted to know about the Galactic Kids Next Door. Seeing how sinister the group was according to the G:KND viral teaser, and seeing how Numbuh 1 is implied to be at the Moonbase, the grown-up Sector V operatives probably wanted to get back at the Galactic Kids Next Door for almost destroying the planet. Even more, the Galactic KND even fear Father, so they'd definitely have fun facing him.
At first glance, the Toilenator might just seem like a simple joke villain with a ridiculous gimmick, but if you do some thinking, his toilet-theme actually does make perfect sense. Children are NOTORIOUS for clogging up toilets and trashing up bathrooms (come on, who hasn't clogged up the toilet at least once as a kid?) and adults often get angry when they have to unclog or clean up the mess their child made, so the Toilenator definitely fits in well with the kid-hating theme of the super villains.
GrandFather is called Grandfather in the past before he was a grandfather, which is odd at first glance until one reads it differently: perhaps in the past he called himself Grand Father, as in a Father that is Grand, Like a Grand Admiral. He only becomes "Grandfather" in the traditional sense once revived.
In his debut, Father believes the KND to be a "minor nuisance" and let the Delightful Children handle their defeat. Why does he have such a low opinion of the KND? The Delightful Children were once elite KND operatives. From Father's point of view, the KND aren't too special if some of their greatest fighters are now his brainwashed minions.
In Operation S.P.A.N.K., apparently Count Spankulot is so far the ONLY villain who suffers legal repercussions... why is that? Well, frankly speaking in regards to real life, dressing up as a vampire and spanking children you don't know does have some nasty Unfortunate Implications and will not end well...
In Operation M.O.V.I.E., pay attention to the movie poster for "Violence: The Movie", one of the characters in the poster appears to be holding pop guns instead of real guns, this might establish in the world of Kids Next Door that REAL weapons like firearms do not exist... and because it is a children's series after all.
In Operation I.N.T.E.R.V.I.E.W.S., Sector V is frustrated that despite everything they've done for the KND, they lose their signature cake retrieval mission to a younger team led by someone who is openly disrespectful to them. Could this be a hint of why teenagers like Cree abandoned the KND? They've effectively spent their entire childhoods fighting to protect kids only to be cast aside and derided as they grow older and replaced by "snotnosed brats" who don't show them any respect for their accomplishments. At some points, Sector V even remark that they deserve the best missions due to being having seniority, implying that they've started developing a mindset that they're better because they're older.
It's entirely possible that many of the adult villains of the series were KND members themselves in their childhood years. Imagine fighting against your oppressors who are constantly trying to destroy you and your friends each day. You dream of a brighter and better future for children worldwide. Then comes the big day, your 13th birthday, and suddenly all of your memories of your adventures, victories, and this cause you so vehemently supported are ripped away in the blink of an eye. Years go by and you, for whatever reason, find yourself growing more and more hatred towards children. Eventually, you become the very thing you once sought to overcome. Worst of all: you aren't even aware that this happens.
"Operation: F.U.T.U.R.E." introduces Numbuh Three's granddaughter, Sally Sanban (given Madame Margaret's female-dominated society, inheriting the mother's surname is Justified). She smuggles one of Madame Margaret's girlifier rifles to the Boys Next Door, who are led by an old Numbuh Four, who doesn't know her, so that they can reverse engineer it, launch a counterattack, and commandeer Margaret's time machine to Set Right What Once Went Wrong. This, combined with old Numbuh Four's advice litany to his younger self at the end of the episode imply that Kuki and Wally did not get together in that timeline. Now, at the end of "Operation: I.N.T.E.R.V.I.E.W.S.", Kuki and Wally are revealed to be married. This heavily implies that Sally saved the world, but erased her own existence in the process. There are scenarios that could result in her being born anyway, but they all require other bad stuff to happen.
From the same episode: Madame Margaret's plan to get rid of the world's male population is extremely fatal. If the entire world's population is female, there are no sources of sperm (sperm banks wouldn't be tapped to avoid the risk of giving birth to males), and therefore, no way for new generations to be born. Therefore, Madame Margaret's plan would doom the human race to a slow and painful extinction without a method of artificial insemination or cloning technology.
"Operation: E.N.D" involves Numbuh 274(Chad)'s FaceHeel Turn. At one point he says "I told my parents I didn't want a stupid party" since he was turning 13. Seems like well-meaning but oblivious parents, until you remember that Chad's parents are Mega Mom and Destructo Dad. Maybe they did it on purpose...
Don't the Delightful Children have actual biological parents? Operation Z.E.R.O confirms that they're not Father's biological children, so it's up to speculation what happened to them—at best, they must be worried sick not knowing what happened to their kids, and at worst they might have willingly allowed him to make their children Delightfulized. The second option is even more likely, considering that no one's ever shown to be looking for the DCFDTL.
Most kids won't think about the implications of Heinrich being a little girl who was transformed into a boy and seemingly forced to adopt a male gender identity for five years before turning back, but for others, especially transgender individuals, one can't help but wonder if Heinrich was such a bitter and petty villain because of some form of gender dysphoria. And on that note, Henrietta might face a little trauma from changing gender identities a second time by the time she's reformed.
In "Operation: I.T.", Numbuh Five says that Father would "grind kids into coffee and drink them". Seems like an exaggeration, until you consider "C.A.K.E.D.-F.O.U.R.", when he basically attempted to bake several children alive. Father could very well be cannibalizing children offscreen... It's even worse when you realize eating kids is the goal of a lot of minor villains in this series. The KND live in a world where cannibalizing children isn't just acceptable, it's encouraged.
The movie reveals that Father is actively trying to kill his own nephew on a daily basis.
It's entirely possible she just kissed him and then beat him up once she realized he wasn't Nigel (accounting for the torn clothes), and it's shown that no one in Sector V ever wants to tussle with Lizzie no matter the circumstances, if they can help it. So maybe he just got a taste of what the rest of them feared.
The Boyfriend Helmet and all the pain it caused. It was in a magazine ad. Which means it's mass produced and the Kids Next Door aren't shown doing anything to stop its production.
More like a Fridge Tear Jerker, but Leona is 350 years old and is still physically and probably mentally 10. Everybody she knew and loved are long dead. A (technically} little girl outlived all her relatives. And if her family did live 350 years ago (with all the diseases and war and such), their deaths probably weren't that pleasant.
At first, the KND just seems like a fun group which helps kids against the tyranny of homework and broccoli. But then you realize, they're essentially Child Soldiers using weapons that could very well kill. And then you notice some of the adults' plans include murder, torture and... worse. In essence, that means this fun, silly group of kids are the only thing keeping the world from tearing itself apart, and they'll inevitably become evil when they turn 13.
Captain Stickybeard has an immense ship that sails on land, it plows the ground, and destroys houses in its path. What are the chances that those houses have people in them?
In "Operation: P.O.O.L.", the alternate universe counterparts of the Delightful Children are still Delightfultized, even though their version of Father is a good guy. HeelFace Brainwashing, anyone?
We all got to see negative counterparts of the cast, but one nega-version we don't see is Negative Numbuh 362 (aka Lehcar), who was originally going to be in the series, but was scrapped. What was she like? Was she just as bad as Negative Numbuh 4, or was she even worse? The DNK may have changed their ways, and Eeballaw has been defeated, but what about Lehcar? She could still be out there somewhere in the Negaverse. What if she takes over the DNK and forces them to revert back to tormenting children?
Another example of Negaverse Fridge Horror: Negative Numbuh Four keeps threatening and ordering people to be sent to "the broccoli mines," and having them react with fear. Which seems like an absurdist gag, until "Operation: I.T." when it's revealed broccoli in the CKND universe has effects on people similar to Superman's kryptonite/radioactive isotopes. Imagine having to mine something that was slowly killing you. And what horrible things could the DNK possibly be doing that required so much hazardous material?
It also raises a serious question after the G.KND teaser about what the Galactic Kids Next Door equivalent must be like in that alternate universe, given that Lizzie was a member of the Dangerously Nefarious Kids in enforcing a successful adult tyranny. If there was anything the GKND would blow up, it would most certainly be a parallel world where their very anti-thesis can exist on a similarly galactic scale - and Earth potentially containing portals to it could be at least one reason for The Ends Justify The Means.
It's odd to see how Numbuh 1 didn't really know too much about his family history. His father knows about Father and Grandfather, but when Numbuh 1 saw both of them in their true forms one of them in P.O.O.L., and the other one when Father was about to transform Grandfather to his evil self, he didn't recognize any of them. Maybe because Monty actually knew about Father all along, but didn't want Numbuh 1 to know the truth until he was ready.
In Operation M.A.U.R.I.C.E, Numbuh 5 scuttles several teen ships in pursuit of Cree and Maurice, in the open ocean. To make matters wore, they're not cartoony galleons like Stickybeard's ship or cruise ships with plenty of life boats, they're aircraft carriers. Anyone who has seen those things know how huge they are. And there are no life boats or life preservers to speak of. Numbuh 5 could have very well sent thousands of teen sailors to Davy Jones' locker. Worse still, the captains that tell Numbuh 5 to go to Chickenpox Island don't seem to care at all about the lives of their brothers in arms.
In the G:KND viral teaser, the members of the G:KND are very much Knight Templars and have managed to convert Numbuh 1 to their cause. What did Numbuh 1 see which caused him to think like that? Are there really adults so bad out there in the universe that they would kill off all life on Earth just to prevent another incredibly bad adult from terrorizing the universe despite there being good adults and teens?
We see that Lizzie was secretly a GKND operative all along. She had a counterpart in the Mirror Universe. Does that mean there's a Galactic DNK? One that's just spreading the adult virus around their universe?
The fate of NumbuhNineteenthCentury: he was never seen again after his first appearance, and that's probably for the best. Consider what happened after he was decommissioned: he's now trapped in a world he doesn't understand with no idea how he got there; he has no home, no family, no one to support him through all this; and he has to come to the realization on his own that everyone he ever cared for is gone and he probably can't even remember their last conversation. Added to this, the bullying he's sure to receive because of his clothes (which of course he can't change because he has no one to pay for new clothes and can't earn the money himself when his understanding of the world is so dated), and if he tried to go to the police his best case scenario would be that he'd be told to stop wasting their time, with the worst case scenario he gets institutionalized. Have you ever had a dream where you found yourself in a weird and confusing place don't know how you got there and have no way to get back? For him it isn't a dream; it's now his life. And all because he made a sexist comment. What makes this worse is that our "heroes" just stand back and watch and the one guy sticking up for him only cares about a cake recipe.
The entire idea that "adulthood" is a virus. For one thing, the implication is that being a "kid" is actually the standard for species' in this universe, which means "kids" would the ones responsible for reproduction (at least assuming that "kid" isn't just a stand-in word for "matured member of the species not infected with the adult virus"). For another, it means that on earth the level of infection has to already be at 100% for all human children to grow up into adults, which means that even if they aren't adults yet all children, including the KND, are carriers.
On a related note, it's possible as well that the adults in the series are either useless or evil because it's a symptom of the virus, and not because it's an actual part of their personality.
It was stated in Operation: I.N.T.E.R.V.I.E.W.S. that three months after Numbuh One left with the Galactic KND, Numbuh 5 became the new KND Supreme Leader after Numbuh 362 retired. While one could argue that at some point during those three months, Rachel turned 13 and appointed Abigail as leader, one should also consider that Rachel had to deal with Nigel (whom she's implied to have feelings for) leaving without even a goodbye or a chance for her to make up for their sour last meeting, and she might not have even known what actually happened to him. She could have retired early from heartbreak.
Operation I.T. shows what its like being the Supreme Leader and Rachel finally snaps under the stress. Chad claims he's been doing this for five years, and as his debut episode shows, he has several extracurricular activities. Is it any wonder he lost his mind?
Not only that but only roughly a year and a half passes in the show. If Rachel who is no slouch and a perfectly capable operative, gets that stressed, well, Chad might be legitimately insane.
It also explains why Chad snapped so badly when Nigel was chosen over him for the GKND promotion — it seemingly invalidated all his hard work and sacrifices, in favor of someone who didn't even know he was in the running for the job in the first place. Being denied the one thing that would have made all those years of stress worth it was Chad's Rage Breaking Point.