History NightmareFuel / TeenageMutantNinjaTurtles2012

** The same goes for Antonio's chef AKA Pizza Face. (He makes a couple of {{cameo}}s in later episodes.

* Karai's fate at the end of the episode. The Shredder is unlikely to be kind to his prisoners

* And before that, Shredder has the chance to destroy it by using his claws. What does he do? Seemingly KILL Splinter instead in front of the Turtles.
** The fact that Shredder is so devoted to his one-track mindset of getting revenge on Splinter that he'd remorselessly and happily ''get the entire planet destroyed'' is this in itself.

* Ms. Campbell. UncannyValley to the max. And then she starts shooting missiles.

* The Kraang dressing up as humans. While PlayedForLaughs, it's still rather creepy to see them ''putting on'' their UncannyValley disguises.

* It's minor compared to the other stuff, but the Kraang had a few moments: The Kraang bots just [[UncannyValley staring into space]], before waking up. Or the Kraang hovering silently while they communicate telepathically. The Kraang can be really� ''alien'' when they're not blabbing away.

* Slash himself is this trope. He shows himself to be bigger and stronger than the turtles, yet also just as fast and agile as them. Despite his size, he can be as stealthy and silent as the turtles, and he's also very cunning, showing how he can use stealth, trickery and misdirection to lure his prey into a trap. Taking everything into account, Slash cements himself as what may be the turtles' deadliest enemy, right up there with Shredder, in just one episode.

* The turtles fighting Tiger Claw in the meat shop. To make it worse, a buzz saw is on while this is all happening. After already seeing in the flashbacks that the 1987 Ninja Turtles were sadly defeated by this guy, it makes the scene even more intense. And the thought of not knowing if they're going to land on it or be thrown into it like Karai almost was made it hard for this troper to watch that he needed to take a breather after that.

* The test subject that got mutated, begging for cheese.

* Several things happen to the boys throughout the show that may [[https://tvtropes.org/pmwiki/pmwiki.php/WesternAnimation/TeenageMutantNinjaTurtles2003 bring back bad memories of the infamously sad and dark 2k3 series episode,]] [[http://turtlepedia.wikia.com/wiki/Same_As_It_Never_Was "Same As It Never Was" (SAINW).]] When in pain Mikey is consistently seen clasping his left arm. During one of Leo's encounters with Karai she throws a type of dust into his eyes that WOULD have blinded him had it been more potent. Lastly when Karai gets mutated into a snake monster she spits an acid like substance at Raph's left eye. It's almost like the writers are deliberately toying at the 2k3 fans and their traumatized memories of SAINW.

While not as serious as its [[NightmareFuel/TeenageMutantNinjaTurtles2003 predecessor]], this version of TMNT has just as much, if not ''more'' material to fright you for days.

* The Amount of AdultFear present here! Just the thought of meeting someone online only to see that he isn't what he seems should be fear enough.

* Mutations in this series tend to be much more horrifying than in any of the previous versions. Most mutants either end up hideously deformed, completely feral, or both. To list, Dogpound is a hulking brute with bone covering parts of his body, and asymmetrical arms. [[spoiler:When he becomes Rahzar, he becomes symmetrical, but also an emaciated apparently-undead figure with [[GlowingEyelightsOfUndeath glowing eyes]] and exposed bones]] Fishface lost his legs, and can't breath outside of water. Mutagen Man is a blob of organs in acidic slime, and completely insane. Rat King looks like a corpse. Kirby's bat mutant form has a hideously swollen brain and mismatched hands. Snakeweed is a plant monster that can't be killed. Spider Bytze is mostly mouth... The list just goes on.
* Several things happen to the boys throughout the show that may [[https://tvtropes.org/pmwiki/pmwiki.php/WesternAnimation/TeenageMutantNinjaTurtles2003 bring back bad memories of the infamously sad and dark 2k3 series episode,]] [[http://turtlepedia.wikia.com/wiki/Same_As_It_Never_Was "Same As It Never Was" (SAINW).]] When in pain Mikey is consistently seen clasping his left arm. During one of Leo's encounters with Karai she throws a type of dust into his eyes that WOULD have blinded him had it been more potent. Lastly when [[spoiler: Karai gets mutated into a snake monster she]] spits an acid like substance at Raph's left eye. It's almost like the writers are deliberately toying at the 2k3 fans and their traumatized memories of SAINW.
[[/folder]]

* The revelation that [[spoiler:Dr. Falco was experimenting on/mutated Dr. Rockwell]].
** [[spoiler: Rockwell himself when he's nuts]]

** He almost succeeded in killing the turtles, [[spoiler: had it not been for the fact that one of the Purple Dragons tossed Leo his sword back.]]

* The Turtles' first battle with [[spoiler: the Shredder]].
** Worse yet was how [[spoiler: Prior to every fight before this where it looked hopeless, there was a chance and the turtles took it. Snakeweed? Leo saw something conveniently to shock him. Spiderbytez? BigDamnHeroes moment courtesy of Raph. Baxter Stockman? Weak point that only needed one shot. Bradford and Xever? Swap places. The Shredder, however, showed no obvious signs of being at a disadvantage. He was '''THAT MUCH STRONGER THAN ALL FOUR TURTLES AT ONCE.''']]
** There was also [[spoiler: the way Xever begged for help after he mutated.]]
** Or when [[spoiler: Raph got electrocuted]].
** And [[spoiler: Mikey getting crushed under a sign.]]
** Then there was Splinter's quote at the end:
--->'''Splinter:''' You were all very lucky. Few have ever faced the Shredder and survived.
*** It may not be much of a surprise to long-time TMNT fans, but it can still be rather frightening knowing that this incarnation of the Shredder has killed people in combat before.

* After the Turtles [[spoiler: freeze Snakeweed with a tank of liquid nitrogen and shatter him to pieces, the camera zooms in on his heart... ''which begins to beat again''.]]

* Ms. Campbell. UncannyValley to the max. And then she starts [[spoiler: shooting missiles.]]

* The reveal that the Kraang's ultimate goal is [[spoiler: to use the mutagen to alter the planet so they can comfortably live on it, which would make it toxic to mankind,]] is horrifying.

* Pretty much anything to do with the mutant Spy-Roach, who becomes even more disturbing after it molts. [[spoiler: And that last shot of a roach embryo screeching inside of a slimy egg...]]

* Don showing what happened after dipping a pizza slice into [[spoiler:a sample of Kraang-made water]]. Mikey gets shocked and says "How can you sleep at night?!"

* Karai going after April, in a civilian alias, at Murakami's diner. Especially the subtly unnerved reaction Murakami has to Karai's order: ([[spoiler:Turtle Soup]]).

* [[spoiler: Pulverizer's new mutant form. He turns into a sickly green blob of goo with visible and graphic internal organs. This, compounded with his head being fried by the mutagen on initial impact, him losing his mind, and going completely feral on the turtles, makes him absolutely terrifying.]]
** [[spoiler: What he says when he's mutating, which is garbled due to the ooze on him: "It burns! I didn't think it would burn so bad!"]]

* [[spoiler: How the turtles look when they're being controlled by the wasps. Their eyes turn black, they drool some yellow substance in place of saliva, and they all around act like wild animals.]]

** [[spoiler: Not to mention how the wasp was so close to infecting all the turtles. It was a miracle that Mikey managed to fight back the MindControl long enough to finish creating an antibody.]]

* [[spoiler: Newtralizer EATS a Kraang.]]

!!!1x25 & 26; ''[[Recap/TeenageMutantNinjaTurtles2012S1E25BooyakaShowdownPart1 Booyaka]]-[[Recap/TeenageMutantNinjaTurtles2012S1E26BooyakaShowdownPart2 Showdown]]''

* [[spoiler: Dog Pound's]] secondary mutation into [[spoiler: Rahzar]].
** And not just the process either. [[spoiler: Which involved him falling into a vat of mutagen, which made it look as if he [[FamilyUnfriendlyDeath died in the most painful manner.]] He has a more terrifying undead look.]]

* When [[spoiler: Rahzar]], Fishface, and Stockman get electrocuted.

* The first [[spoiler:April clone's mad laughter and her face while doing it. Then the turtles have to fight a deformed clone. Words do not describe how terrifying that thing is.]]

* It's minor compared to the other stuff, but the Kraang had a few moments: The Kraang bots just [[UncannyValley staring into space]], before waking up. Or the Kraang hovering silently while they communicate telepathically. The Kraang can be really… ''alien'' when they're not blabbing away.

** And in the creature-based fears, it's usually whole ''floods'' of that specific creature, swarming over ''everything''. At one point Raph thinks he's found Mikey... [[spoiler:only for "Mikey's" head to pop off and spray Raph with cockroaches ''before his lifeless/headless body drops to the ground'']]. And in another instance, Casey visualizes rats swarming over and burying Raphael and Michelangelo! "Horrifying" does not even begin to describe this episode.

* [[spoiler: Stockman]]'s mutation can be incredibly disturbing (Unlike his 80's cartoon counterpart, which looked much more tame and kid-friendly). The buzzing, constant muttering to himself, and throwing up digestive juices on his food make it one of the more unsettling mutations of the series.

* One can only wonder the fate of [[spoiler: the pizza that Mikey locked in the freezer with Ice-cream Kitty.]]
** The same goes for [[spoiler: Antonio's chef]] AKA [[spoiler: Pizza Face.]] (He makes a couple of {{cameo}}s in later episodes.
* One that note, Mikey [[spoiler: eating sentient pizza,]] ESPECIALLY when [[spoiler: he ate the majority of Pizza Face's body from the inside out.]]
** It gets worse; considering the fact that [[spoiler: Pizza Face was created from the mutagen being exposed to a human and pizza,]] while Mikey is a turtle exposed to human DNA, he [[spoiler: technically committed cannibalism.]] It might have been the only option, but still...
** The fact that the scene where [[spoiler: Mikey eats his way through Pizza Face from the inside out]] is similar to the infamous "chest-burster scene" from Film/{{Alien}}.
* Oh yeah, remember that pizza locked in the freezer with Ice-Cream Kitty? [[spoiler: [[ShownTheirWork Cats are very fond of cheese]].]]

* [[spoiler: Karai's fate at the end of the episode. The Shredder is unlikely to be kind to his prisoners]]

* [[spoiler: Karai's mutation into a snake creature, and she can also transform back into human form at will [[http://turtlepedia.wikia.com/wiki/File:Karai_Mutant_B.jpg with sharp teeth and creepy green eyes]].]]

** [[spoiler: The mutated Karai]] sprays venom into Raph's eyes. Seeing him flailing and screaming in pain after the tragedy that just occurred...

!!!2x24 ''[[Recap/TeenageMutantNinjaTurtles2012S2E24IntoDimensionX Into Dimension X]]

** [[spoiler: Mrs. O'Neil's true form, which could give The Thing a run for it's money.]]
** [[spoiler: The creature imitating Mikey...with the single creepiest blank smile on it's face it can possibly create.]]
** [[spoiler: The situations that Leo and Raph are in, when they realize that the alien is among them...with the alien taking Donnie and Leo's form, with hideous Kraang tentacles sticking out of his body.]]
** [[spoiler: [[BodyHorror Join us, April]]. Join us...]]
** A little FridgeHorror too; the fact that ''no one but Mikey'' suspected something was wrong with Mrs O'Neil. She is ''that'' good at acting, and the ''only'' reason she was found out was because [[spoiler: she got over-emotional and revealed her true appearance because of it.]] If Mikey hadn't thought something was strange, or if [[spoiler: she'd kept her cool just a few seconds longer...]]

* [[spoiler:The BodyHorror Speed Demon inflicts on Donnie.]]
* Speed Demon's actual [[TheReveal Reveal.]] Donnie's OhCrap moment as he realizes the true mutant is the ''car'' instead of the human he's dragged out of it, and then the car turns its headlights on. ''Right'' behind him. And then we get treated to the [[SarcasmMode lovely]] shot of [[spoiler: Donnie screaming as Speed Demon surges forward and ''[[SwallowedWhole eats him onscreen.]]'']]
* This whole episode can be horrifying for anyone who's seen or been part of a traffic accident or for those who lack confidence in their driving abilities.
* One of the chickens mutating into Dr. Cluckingsworth (M.D.) especially with her swollen, exposed brain. Thankfully she's not malicious and was a valuable asset for Donnie and Casey's fight against Speed Demon.
* Of the FridgeHorror variety: [[spoiler: the end of the episode has Donnie talking about Casey's race with his possessed self. If he actually ''knows'' what happened, in full detail, [[AndIMustScream then he was probably aware the entire time.]]]]

* Zeck and Sterenko's [[spoiler:mutation]], which is treated almost like an execution.
* The idea that [[spoiler: Karai is slowly losing her sentience]]. While she seems okay for the moment, it's a horrible thing to think about.

* Despite being a good guy, Muckman is possibly the most gruesome mutant yet. [[spoiler: He is a shambling, ooze-covered zombie with pulsing tumors and exposed bones, his sentient eyeball can rip itself out of his socket at will, and his intestines are hanging out of a giant gaping hole through his torso. Said hole also prominently displays a horrifically shattered spinal column with exposed spinal cord, apparently a result of falling off a building during his mutation. Which adds some FridgeHorror in that, had he not mutated, his injuries would have been fatal.]]

* Stockman's [[spoiler: mind control worms. The design is creepy enough, but it is implied that they ''drill into the brains of their victims in order to take control of them''. If Raph's screaming when he was brainwashed was any indication, it is a very painful and unpleasant process.]]

* [[spoiler: The Triceratons successfully activate their black hole generator, swallowing Earth. That's over '''7 billion people''' and every living thing on Earth dying all at once.]] The destruction of the Earth is shown in full view and its tragic to see a case of TheBadGuyWins go so horribly well.
* And before that, Shredder has the chance to destroy it by using his claws. What does he do? [[spoiler: Seemingly KILL Splinter instead in front of the Turtles.]]
** The fact that [[spoiler: Shredder is so devoted to his one-track mindset of getting revenge on Splinter that he'd remorselessly and happily ''get the entire planet destroyed'' is this in itself.]]

* In "The Evil of Dregg" we see Raph [[spoiler: decapitate Lord Dregg, and then see we a ''robot'' head underneath that while the head ''keeps talking'' and the robot head talks with it.]] We never get any explanation about it or how [[spoiler: the head is able to keep talking]].
* Although [[AssholeVictim he totally deserved it]], [[spoiler: Lord Dregg's]] brutal onscreen death. The Triceratrons trick him into entering a room where he assumes that he'll get his payment for providing them with the black hole device, only to end up ThrownOutTheAirlock and into [[SpaceIsCold the empty void of cold space]] [[KillItWithIce where he freezes (to death?)]]. As his lifeless husk floats adrift, we're treated to a close-up of his body's [[NightmareFace lifeless face of terror]].

* [[spoiler: The Super Shredder is pure NightmareFuel. Imagine an injured, limping, hulking Shredder with many spikes and blades coming out of his body and a seriously distorted face with teeth, and you have the idea.]]
* In "Darkest Plight", [[spoiler: an injured Splinter is confronted by [[TheBusCameBack The Rat King]], who managed to survive his fall in "Of Rats and Men". He spends most of his appearance in the episode torturing Splinter, providing the viewer with a lot of horrifying visuals.]]
** [[spoiler: However, towards the end of the episode, it's revealed that Splinter was actually hallucinating, with a [[FamilyUnfriendlyViolence surprisingly graphic shot]] [[DeadAllAlong of the Rat King's corpse.]]]]

* Alopex [[spoiler:taking Tiger Claw's arm]]. Mind you, she did warn him what would happen, but still, that was so fast it was ''gruesome''.
* In "Requiem" [[spoiler: Splinter's death, he gets stabbed by Super Shredder and thrown off the Wolf Hotel to his death]].
* As might be expected for the finale of the Turtles' final battle with Super Shredder in the wake of [[spoiler: Splinter's death]], the gloves come off and things get brutal:
** Raphael [[spoiler: tearing out Fish-Face's rebreather, leaving him to asphyxiate on dry land]]

** Donatello [[spoiler: hacking the aforementioned security system, causing its laser turrets to open fire on Bebop and Rocksteady and they can be heard screaming off screen.]]

* The Creep, a [[HillbillyHorrors hillbilly sort of]] [[JustForFun/XMeetsY fusion of ]] [[Franchise/FridayThe13th Jason Voorhess]] and [[Comicbook/ManThing Man-thing]] made of swamp muck. It never talks, only makes weird animal-like noises. What it does to Raph is also pretty creepy.

** [[spoiler: The creature immitating Mikey...with the single creepiest smile on it's face it can possibly create.]]

* The Dream Beavers. Despite the odd name (which Donnie found humorous), the idea of soul-sucking inderdimentional creatures is quite frightning, especially when one finds the FridgeHorror that they are basically furry Freddy Kruegers.

* [[spoiler: The Triceratons successfully activate their black hole generator, swallowing Earth. That's over '''7 billion people''' dying all at once.]]
* And before that, Shredder has the chance to destroy it by using his claws. What does he do? [[spoiler: Seemingly KILL Splinter instead.]]

* The Kraang take this on a tragic turn. Once the peaceful Utrom, when Kraang mutated himself with the mutagen, he enslaved nearly his entire race with his vast new powers. He was destorying their identities to become his HiveMind lackeys, an entire race now brainwashed because of him, including the Utrom's best hero, now known as Kraang Sub-Prime.

* The robed, implike creatures are themselves quite unnerving, capable of no-selling the turtles attacks.

* What happened to the pizza guy and blonde woman. And all the other humans in that scene, once you realize the context.

While not as serious as its [[NightmareFuel/TeenageMutantNinjaTurtles2003 predecessor]], this version of TMNT has got just as much, if not ''more'', to fright you for days.

While not as dark as its [[NightmareFuel/TeenageMutantNinjaTurtles2003 predecessor]], this version of TMNT has got enough to fright you for days.

* The final line of the episode from Leatherhead, as he approaches two Kraang who are trying to inform the others of the Turtles success in obtaining a power cell from them:

* The final line of the episode from Leatherhead:

*** It may not be much of a surprise to long-time TMNT fans, but it can still be rather frightening knowing Shredder has killed people in combat before.

* The Turtles' battle with [[spoiler: the Shredder]].

While not as dark as it's [[NightmareFuel/TeenageMutantNinjaTurtles2003 predecessor]], this version of TMNT has got enough to fright you for days.

* Doubles as an AwesomeMoment, but after Leo disables Tatsu's hearing with a pressure point attack, we're treated to a MookHorrorShow of Karai's snake arms coming out of seemingly nowhere to bite Tatsu over and over. And to finish off the attack, she lunges at him JAWS FIRST, and it looks like she's going to eat him. She backs down, but good lord...

* Mutations in this series tend to be much more horrifying than in any of the previous versions. Most mutants either end up hideously deformed, completely feral, or both. To list, Dogpound is a hulking brute with bone covering parts of his body, and asymmetrical arms. [[spoiler:When he becomes Rahzar, he becomes symmetrical, but also an emaciated apparently-undead figure with [[GlowingEyelightsOfUndeath glowing eyes]] and exposed bones]] Fishface lost his legs, and can't breath outside of water. Mutagen Man is a blob of organs in acidic slime, and completely insane. Rat King looks like a corpse. Wingnut has a hideously swollen brain and mismatched hands. Snakeweed is a plant monster that can't be killed. Spider Bytze is mostly mouth... The list just goes on.
* Several things happen to the boys throughout the show that may [[http://tvtropes.org/pmwiki/pmwiki.php/WesternAnimation/TeenageMutantNinjaTurtles2003 bring back bad memories of the infamously sad and dark 2k3 series episode,]] [[http://turtlepedia.wikia.com/wiki/Same_As_It_Never_Was "Same As It Never Was" (SAINW).]] When in pain Mikey is consistently seen clasping his left arm. During one of Leo's encounters with Karai she throws a type of dust into his eyes that WOULD have blinded him had it been more potent. Lastly when [[spoiler: Karai gets mutated into a snake monster she]] spits an acid like substance at Raph's left eye. It's almost like the writers a deliberately toying at the 2k3 fans and their traumatized memories of SAINW.

* ZOMBIE SHREDDER.

* Naturally, the Halloween arc has plenty of nightmare fuel ranging from violence, graphic imagery, and various stuff of nightmares like being chased by the Headless Horseman.

* When Donatello confronts Don Vizioso, it's clear from the look in his eyes and the almost guttural that he is moments away from gutting the Don in revenge. It's only Donny seeing what he looks like in his naginata's reflective blade that makes him realize what he was about to do.

* The Creep, a [[HillbillyHorrors hillbilly sort of]] [[XMeetsY fusion of ]] [[Franchise/FridayThe13th Jason Voorhess]] and [[Comicbook/ManThing Man-thing]] made of swamp muck. It never talks, only makes weird animal-like noises. What it does to Raph is also pretty creepy.