As a Fridge subpage, all spoilers are unmarked as per policy. You Have Been Warned.
- James Issac Neutron is named after Sir Isaac Newton; go figure.
- A more subtle one: Jimmy's name also comes from Sir James Chadwick, who discovered the neutron.
- In the body swap episode "Trading Faces," Jimmy's plan to get his and Cindy's brains back into their correct bodies is to dump both of their minds into a virtual brain pod. During this time, Libby, Carl, and Sheen will sort out which memories and abilities belong to which person. After spending hours sorting through their memories, they finally come upon one that's so confusing they can't decide who it belongs to ("Extreme dislike of girls who dislike boys who dislike girls who dislike show-offy boys..."). This annoyingly recursive memory either represents Jimmy's anger with Cindy for always being the one to call him out on his arrogance, or Cindy's self-loathing regarding the fact that she's begun to develop a romantic interest in Jimmy despite originally only seeing him as a problem-causing know-it-all. With the three of them too exhausted and bored to bother sorting out whose memory it is, they instead just delete it. In doing so, they inadvertently remove the mental block that kept Jimmy and Cindy from being able to truly connect and see each other as anything more than rivals. When viewed in the grand scheme of the entire series, this one event brought upon by a mix of random chance and impatience would result in their eventual Relationship Upgrade at the end of the show.
- Why does the Cop-Bot from "The Tomorrow Boys" love Graystar? Because he comes from a future where Libby rules the world, and Graystar is Libby's favorite band.
- At the end of "Stranded," Jimmy arguing with Cindy that Australia isn't a continent isn't a mistake. Jimmy's just using it as an excuse to argue with Cindy, as this seems to be their (at least public) version of flirting. Remember the relationship between Calvin and Susie? It's the same thing here.
- It could also double as an excuse to go on their own hovercar trip, to "see who's right" when in reality they want some time to themselves.
- In "Beach Party Mummy", one gag involves Sheen saying "great" for one day straight. Considering that you might have eventually thought at one point, "Wait, why are they stalling that long when they know they have a class going on and they'll get caught?", it may seem like an absurd (yet just as, if not all the more, funny) gag that works due to Rule of Funny...but remember that earlier, the class begins to watch a 97-hour video on the history of mummies. While possibly a coincidence, perhaps the video being comically long was written in the script just for the gag later in the episode.
- Perhaps adding to the gag and making it funnier, the entire class (including Ms. Fowl and the principal) fall asleep to the video and are shown sleeping even after the group comes back — suggesting that they were so bored that they slept through the documentary for two days straight.
- Why would the pizza at the end of "Sleepless in Retroville" be afraid of children and see them as scary bogeymen? Well, when you consider what children usually do to pizza, he's certainly not unjustified...
- The Episode "Carl Wheezer, Boy Genius" where Carl pretends to be a Boy genius to impress his Pen-Pal girlfriend. The episode is infamous for Carl acting like a jerk towards Jimmy when pretending their roles are switched. While one could consider this out of character for the normally nice Carl, it could be him getting even with Jimmy. Think of it, Jimmy constantly uses him as a Guinea pig for his experiments (such as the electrical door one) so him acting like a jerk could probably be his built up anger.
- In "Men at Work", Skeet scolds Jimmy for not using the cash register properly since he did it all in his head instead. This makes sense since the cash register is used for inventory and sales management.
- Jimmy's Lack of Empathy makes a little more sense when one factors in the fact that he's a kid with an incredibly enhanced intellect for his age and likely lacks the emotional maturity of his peers due to an over-focus on his research.
- The fact that Beautiful Gorgeous was even born proves that Professor Calamitus really did finish something. Unless the joke is that he either didn't finish something else, like naming her an actual name or he didn't finish applying a birth control method.
- In "N-Men" Jimmy's Hulk-like transformation seems out of character, but it makes sense. When they're hit with the radiation, Jimmy is arm-wrestling with Cindy. His rage gives him strength, and his powers themselves erupt after he loses it.
- It also make sense his powers are activated from his anger. Over the course of the series, he's saved people countless times (some of which were his fault, but some weren't), and yet they treat him terribly, even harass him just for being himself. His power reflects his bottled rage from years of harassments (from Cindy, in particular) and gets his chance to knock some senses to those who've wrongfully ridiculed him, despite saving their ungrateful butts... Well, there was only so much apathy Jimmy could take until he finally snaps.
- As they're passing through the radiation, Cindy even taunts him with "getting angry, Neutron?"
- There's when the N-Men begin to grow weaker from their powers burning their metabolisms, yet Jim suffers no ill-effects from this, in both his normal and hulk form. In the three days time span and judging from the Purple Flurp cans littered all over Jim's lab, he's given himself a lot of nutrition for his own metabolism since the military (at first) believed him to be no threat. All while, Cindy and the others are practically starved while in custody which their mutated metabolisms couldn't maintain.
- In addition to all of this, as Jimmy's reflection points out to his hulked out self, the more the N Men use their powers, the more their metabolisms burn up their life forces. The rest of the N Men started using their powers as soon as they returned to Earth and they continued using them for the next three days, while Jimmy's powers didn't awaken until he lost his temper. His metabolism probably functioned at a normal rate up until he hulked out.
- Meldar Prime's Matrix Generators and Jimmy's knowledge of the concept in "Win, Lose, and Kaboom!" easily explains how he's able to take fairy magic in stride without ever truly realizing it is magic. He assumes their magic wands (and the Big Wand that powers them by extension) are either Matrix Generators themselves or at least work on the same principle.
- When Sheen starts bonding with the baby pterodactyls in "Sorry, Wrong Era", he sounds genuinely emotional when he shares that he's "never had brothers before". Being an only child, it seems that he really desires having siblings of his own, which could explain why he's so close to Jimmy and Carl.
- Jimmy being a Terrible Artist brings to mind the (debunked) idea of "left brain/right brain dominance". The left brain focuses on logical thinking, while the right brain is all about expression and creativity. Obviously, Jimmy has the former.
- In Sorry, Wrong Era, Hugh borrows Jimmy's latest invention — a remote-control that fast-forwards and rewinds real life. He uses it for some humorous and harmless things at first, but later Judy sees an angry mob bringing him home, and one woman claims that "He made me experience the miracle of birth... again and again and again!" Which means that Hugh watched a woman give birth to her child, then rewind it so it was pushed back in, then she pushed it out again, and this went on for some time... and earlier it was established that you feel everything happening when you're "rewound".
- Also from Sorry, Wrong Era, Sheen gets carried off by a pterodactyl. Jimmy's answer to the problem is to go find his Rewind Machine so he can use it to save Sheen and send themselves back home. Sheen ends up adopted by the creatures, but if he hadn't been, Jimmy would have rewound Sheen through getting torn apart and eaten alive.
- In the special "Win, Lose, or Kaboom", the cast are forced to participate in a Game Show in which all teams but the winner get their home planet destroyed. At first, things aren't looking so well for Earth's team, and the host warns Jimmy that teams who lose the first three events (of five) in a row get their home planet destroyed 99.99% of the time. The only way the host could know that exact number would be if the game had been played at least 10,000 times... meaning that at least 30,000 planets with civilization have been destroyed.
- That said, the host may have been going for additional drama... which itself is Fridge Horror, since it means not only is he the one holding this game, he's manipulating the outcome to serve his own ratings. That's right, a nigh-unto-omnipotent being is tormenting people for ratings before killing off their entire home planet.
- "Lady Sings The News" was the last episode of this show. It ends with Carl still stuck in the stockade. He never escapes, and his scapula still hurts. On a lesser note, one can assume that Corky has been pelted. But hey, Jimmy and Cindy finally get together at the last minute, so at least their shippers will be happy.
- Well it technically wasn't the last episode; "El Magnifico/Best in Show" and "King of Mars" both aired after it.
- "The League of Villains" was supposed to be the last episode but got aired too early by mistake. The only episodes that chronologically take place after "League of Villains" are "The Jimmy Timmy Power Hour 2" and "3".
- Several fans have observed a rather peculiar detail on Cindy's life revealed by Word of God, namely that she was born on 5 June in Las Vegas, Nevada. Considering that the show takes place in Retroville, Texas, and that Mr. and Mrs. Vortex seem to share no visible features with their daughter, some have assumed that she is in fact adopted rather than their biological child. Also, the city in question being one of a rather infamous reputation for its night life, one would be justified in questioning the circumstances of Cindy's conception.
- Even more disturbingly, this might make the common Fanon that Cindy's mother is abusive (sometimes physically but just about everyone believes that she spends most of her time belittling her daughter) make a degree of sense; if Cindy is the result of her having a drunken one-night stand, she's a living representation of a moment of weakness and if her husband was the one who had drunken sex, Cindy represents the fact that she wasn't good enough for him.
- The only being in Jimmy's life that's reliably caring is his robot dog ...which means he probably struggles with having to live with the fact that the only reason Goddard won't let him down is because of how he's programmed ...and being okay with it because it's better than being alone and waiting for his peers to kick him to the curb. Even Sheen and Carl can flip the switch to antagonizing Jimmy if it suits them.
- "The Big Pinch" has Jimmy borrowing Thomas Edison from the past, which later ends up causing electronic devices to gradually disappear in the present time. There is something mortifying about the fact that anything in the history of the world can be drastically changed and even eradicated solely by, say, one genius elementary school student bringing a historic figure into the present just to disprove somebody's school presentation.
- "Trading Faces" has Jimmy's solution to the "Freaky Friday" Flip between him and Cindy being to essentially mash their brains together and have Carl, Sheen, and Libby reassign their personality traits to the correct bodies. Not only is this an imperfect solution by itself - it's shown that the three made blind guesses and deleted one of the traits altogether - but it begs the question on if the Jimmy and Cindy we follow afterwards are actually themselves, or if they've been essentially brainwashed into believing they're actually each other for the rest of the series. Is Jimmy actually Jimmy, or is he actually a brainwashed Cindy and vice versa? It is a possibility, but also it could be seen as an attempt for the writers to expand upon their characters by making them do things they originally wouldn't.
- In Monster Hunt it is revealed that Jimmy's dad has been dumping highly contaminated chemicals from his lab in the Lake Retroville for years, which caused Carl's pet turtle, Snappy, to become a monster. While Jimmy and company are able to cure Snappy, how we do know that there isn’t more than one monster in the lake all because of Hugh's foolishness.
