[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/fringemarionette_scifimaniadotcom.jpg]]
[[caption-width-right:350:Prepare to never sleep again. Ever.]]

''Series/{{Fringe}}'' has '''a lot''' of scary and disturbing stuff.

* The almost unbearable tension from the start of the teaser to the first sign of gross otherworldly mayhem. Nothing's happening ''yet'', but you just ''know'' this [[VictimOfTheWeek poor bastard]] is doomed... any... minute... '''[[BodyHorror now.]]'''
* The first five minutes of almost every episode. And a good portion of the rest. But especially Flight 627.
** A diabetic passenger on an international flight injects himself with what he thinks is his insulin, but is actually a fast-moving disease that first makes him ill, stagger to the lavatory, vomit on a stewardess, and then ''makes the flesh dissolve off his bones as it swiftly spreads to everyone else on the plane''.
** We also get a ''[[SarcasmMode very lovely]]'' closeup of the co-pilot's '''''[[spoiler:jaw falling off!!!]]''''' ''Good God...''
* Another episode involves a woman who emits a form of radiation when she's stressed that literally superheats the water in organic tissue. As a test, this woman is bound to a hospital bed and a rat is released into the room. She freaks out when it starts crawling on her, and the radiation makes the rat ''explode''. This example is only made slightly less sickening when you see the heroes trying to re-create the radiation to test it and save the woman, they end up blowing up a papaya in a rather sticky spray that was made ironically more amusing when Walter Bishop refers to said papaya as "The friendliest of fruits"....
** Was that the same episode with the woman whose head exploded in the opening (after killing everyone else in the diner, thanks to that radiation spreading ability)? Yeah...
* A gas released on a public bus crystallizes, trapping the passengers inside like flies in amber. I, being one who rides the bus regularly, still get the shivers when I remember the crazy of the day for that episode whispering ''"I know what's going to happen on the bus..."''
* A boy is surfing the web when a popup BlipVert entrances him. A hand reaches out of the monitor, deforming it, and grasps the boy firmly by the head, boiling his brain inside his skull.
* A college professor is lecturing about virology. He starts to choke and sputter, then collapses. His TA attempts to give mouth-to-mouth, but pulls off when something bulges out his neck and starts to climb out of his mouth: A spiney looking slug.
** Ironically, it's a supersized cold. Which immediately makes the thing [[NightmareRetardant Nightmare Retardent]] for people with a biology or medicine background; for reference real viruses look like [[http://www.rkm.com.au/imagelibrary/index.html this]]. They also don't get much larger than a few microns across. You can drink that water in peace now, maybe...
** It could be modified (multicelluar?) or something? *pushes away water glass*
** Later explained on [[AllThereInTheManual Walter's notes on the website]], where Walter explained that he was wrong and it wasn't a cold virus but in fact a mutated, oversized stomach cell.
* The random newsagent who gets a two dollar bill and then [[AndIMustScream his orifices seal up.]] His nose, his mouth, his ''eyes'', and he suffocates. It gets worse when Walter asks if anyone checked his anus and penis to see if those sealed too. It gets even worse when they try and get the guy responsible; [[spoiler:one of the agents is exposed to the same chemical, and the main character tries to save him via a tracheotomy. The skin simply ''eats'' the trach.]]
** The Bishop family ''weaponise'' it in ''"The Bullet That Saved The World"''. ''Windmark'' calls it [[EvenEvilHasStandards barbaric.]]
* "Jacksonville" provides some absolutely terrifying BodyHorror with [[spoiler:a building from Over There colliding and merging with a building Over Here, ''fusing'' the two buildings together, along with all its inhabitants. Made that much worse by Astrid's refusal to dissect the body of a man fused with his alternate. When someone who works every day on fringe cases with Walter is upset by something, you know just how extreme it is.]]
* The Russian cosmonaut that became host to some sort of Radiation Vampire from space.
* Some other terrifying deaths include [[ItMakesSenseInContext being eaten by an evil mole baby]], the toxin the disintegrates your bones (creepy doll optional), [[ItMakesSenseInContext a were-hedgehog ripping apart a plane full of people]], [[HalfTheManHeUsedToBe David]] [[PortalCut Robert Jones']] exit in season one [[spoiler: and four]], '''THE PREGNANCY IN EPISODE TWO''', [[StrappedToAnOperatingTable having your pituitary gland removed]] [[AndIMustScream while you are completely conscious]], walking through walls failure, being bludgeoned with a suitcase by someone sleepwalking and thinking you're a demon from hell, the beetles that rip their way out of their human hosts while they're alive, several instances of brains melting, [[HeartTrauma your heart being cut out]] [[AndShowItToYou and only dying hours after]], [[BodyHorror contagious, immediately fatal cancer]], rapid aging, acute exhaustion, [[SpontaneousHumanCombustion spontaneous combustion]], [[ParanoiaFuel nanites]], [[YourHeadASplode at least two instances of heads exploding]], '''BEING DEHYDRATED ALIVE WHILE SCREAMING/PLEADING WITH YOUR KILLER TO RELEASE YOU''', being drain of radiation until you were nothing but ash, a zombie being thrown into a turbine, the giant hookworm thingy, jumping out of a window because you've been infected with a thousand year old virius, [[YourMindMakesItReal a hallucinogen that can make your throat slit itself]], [[ItMakesSenseInContext being chopped up by butterflies]], [[ArsonMurderAndJaywalking being suffocated with cling wrap]]...
** In the Series Finale, most of these splendid deaths get a little... let's call it a Hall of Fame run.
* Detective Olivia in "Brown Betty" [[spoiler: getting trapped in a wooden coffin and thrown into the ocean, simultaneously suffering from claustrophobia and slowly drowning.]] ''[[WhatTheHellHero And Walter is telling this story to Olivia's innocent little niece Ella.]]'' Surprisingly, Ella seems fine with the subject matter, as long as it makes for a good story.
* The Marionette. The ballet dance. Good grief... the ballet dance.
** The victims in that episode. [[EyeScream Holy]] [[HeartTrauma shit.]]
* The end of [[https://www.youtube.com/watch?v=gaNnxWXMft4 this video]]. And be sure to watch all the way to the end.
* Walternate and evil!Brandon
** Particularly Walternate's grin in 'Bloodline'. Brrr...
** The look of ''utter loathing'' Walternate gives Olivia every time he sees her. ''Especially'' when he pulls her out of the tank in "The Abducted". And it makes a disturbing amount of sense considering she was the one who convinced Peter to stay.
** Taken even further in the BadFuture of "The Day We Died". [[spoiler:Having lost his entire universe, Walternate declares he will destroy Peter's universe in revenge... then he ''murders Olivia!'']]
* Olivia's deadpan statement [[DissonantSerenity "...But, I think he's the man who's gonna kill me."]] Complete with ScareChord. [[http://youtu.be/GejPVkBU4Eo Watch here.]]
** The Man in the X T-Shirt himself is NightmareFuel.
* Getting ''erased from existence'' is fairly disturbing in my opinion.
** You think that's bad; suppose you manage to undo it, and then find out that ''no one you love remembers you''. Oh, and [[spoiler:you had a son you didn't even know about until after he'd been erased as well]].
** Olivia's situation in season 3 is somewhat similar. Imagine being all alone with a single ally in the entire world. ''Literally.'' Not to mention the light deprivation torture, experimentation, imprisonment and [[StrappedToAnOperatingTable potential organ removal]] (while conscious!) with little or no chance of rescue.
* [[DaydreamSurprise Olivia's nightmare (daymare?) in episode two.]] [[AmbiguouslyEvil Especially]] [[ScaryBlackMan Broyles.]]
-->'''Broyles''': Were you... safe? You weren't were you.
* Seeing a corpse that looks exactly like you is a pretty frightening idea.
* The episode "Bad Dreams." Especially the beginning. IronicNurseryRhyme. A woman alone with her baby in a creepy, empty train station. The train is coming. Someone is coming up to her. [[spoiler: Then ''fricking Olivia Dunham'' shoves her onto the tracks]] with this utterly blank look on her face.
** The other nightmares, which include Olivia guiding a woman's hand to slit her own throat and guiding another woman's hand to stab her husband, are equally terrifying.
* You've just been kidnapped. [[DamselOutOfDistress You rescue yourself because you're a Badass.]] You wake up handcuffed to a hospital bed. [[StrappedToAnOperatingTable Again.]] With a sex offender sitting by your bed. ''Who doesn't like you.''
* Crazy Walter... lovable old man who likes candy. Walter with his brain rejuvenated? ''[[spoiler: He frigging cuts off William Bell's hand and leaves him in suspended in amber.]]'' [[AndIMustScream Holy shit.]]
** [[spoiler: Considering the douche was just standing around, chatting causally while Astrid was bleeding in Walter's arms (shot by ''his'' men) and turned Olivia into a ApocalypseMaiden... you can see where Walter was coming from. You can also add William Bell to Nightmare Fuel list.]]
** The reason why [[spoiler: Walter]] had those pieces of brain removed in the amber timeline. [[spoiler: William Bell's plot was ''all his idea'' and he knew ''exactly'' how to pull it off.]] [[EvilMeScaresMe Damn.]]
** This was alluded to way back in Season 2.
-->'''Walter:''' *smile* [[AmnesiacDissonance And how are things on your side?]]
* The Observers, ''especially'' in "Letters of Transit".
** Windmark ''smiles''. After four seasons of [[ShipperOnDeck September]] being emotionless, it's just... not... [[SlasherSmile right.]]
-->'''Windmark:''' Hello, little girl.
** [[spoiler: Windmark killing Etta.]] Because instead of unceremoniously shooting her in the head like a ''nice'' monster who isn't emotionally invested in such things, he ''chokes'' her first, takes the time to ask about [[spoiler:the bullet necklace]] (while he's nonchalantly choking her), realizes that the reason [[spoiler:Peter bought it for her]] was because he loved her, and ''then'' shoots her in the stomach so she can slowly bleed to death.
** Windmark versus [[spoiler:Peter]] is terrifying for two reasons. One, for an emotionless {{Transhuman}}, Windmark sure looked ''[[NotSoStoic pissed off]]''. Two, Windmark [[spoiler:shows Peter Etta's final thoughts.]] Apparently the only emotions Windmark is capable of are sadism and anger.
** Windmark stops smiling when [[spoiler:Nina Sharp]] tells him [[TheReasonYouSuckSpeech why he and the rest of his kind sucks.]] [[DeathGlare The look he gives her...*shudder*]]
** Speaking of that episode (Letters Of Transit), the SpecialEditionTitle. Yeah, the mere opening credits themselves. "So it's a bad future, which words are going to be used... [[https://www.youtube.com/watch?v=Rk3rX-9qLrY&feature=related oh".]] JustforFun/HolyShitQuotient up to eleven.
** That one Observer in "Letters of Transit" who [[IHaveYouNowMyPretty forces the woman at the club to sit on his lap.]] They're ''supposed'' to be emotionless but it was fairly obvious what they were implying. Her employer rescues her but still. Rapist who can teleport, [[MindRape brutally read your mind]] and catch bullets? ''No, thank you.''
* [[spoiler: Reanimating Jessica.]] ''Eyes should not be doing that.''
** Let's not forget her distorted voice.
** All while talking like she's a little girl.
-->[[spoiler:Ding ding ding. My bicycle. My bicycle is blue and has a little chimey bell on it. [[SlasherSmile Ding ding ding. My bicycle is blue and has a little chimey bell.]]]]
* The bad guy from "A Short Story About Love". Dehydrates husbands ''alive'', takes their pheromones and the tries to use them to sleep with (read: [[BedTrick rape]]) the grieving wives. When the women wives realize that this guy is not their dead husband, he suffocates them with cling wrap. [[WoobieDestroyerOfWorlds He tries to play the sympathy card]] and, unlike a lot of the other villains on this show, it ''really'' does not work.
* David Robert Jones. His partiality to inflicting BodyHorror on unsuspecting innocents, his electric torture of Nina Sharp [[spoiler: from the alternate universe]], the fact that he outplays ''both'' Fringe teams, his creepy politeness, his brutal beating of Peter Bishop with a crowbar even though he probably could have just shot him or infected him with some kind of parasite... he's terrifying.
* David Esterbrooke's threat to Olivia. "I'm sure you'd want to start a family some day. It'd be a shame if something got in your way." [[YourHeadAsplode Consider what that guy had been doing to women during that episode]]... *shudder*
* [[spoiler: Meana Sharp. Because a bitchy alternate version of your surrogate mother drugging you in an attempt to destroy your universe is terrifying.]]
** Doubles as a terrifying situation for Nina Sharp. She's got [[spoiler:her alternate]] who can get into the most secure part of ''Massive Dynamic'', [[spoiler: a sadist like Jones]] and the [[spoiler:man she loves (who also happens to be a MadScientist capable of pretty much anything) all conspiring to use her surrogate daughter to destroy two universes (which also includes Rachel's family).]]
* How the [[spoiler: Observers torture Walter. Even complete with capillaries in his eye bursting. It makes it that much worse that he's having a seizure during all of this and trying desperately to protect his granddaughter.]]
-->'''Windmark:''' You seem much more interesting as a human being... than as a vegetable. But all things being equal... I don't care which one you end up.
* The Japanese woman in the Black Market in 5x01. Just... sitting there. Not saying word. Just staring. There could be any number of nightmare-free reasons for this. Given the [[BadFuture time]] and [[CrapsackWorld place]]... she's probably been [[MindRape mind raped]].
* [[spoiler: Simon's fate.]] ''[[LosingYourHead Damn.]]''
* The removal and reinsertion of Observer tech [[spoiler: into Peter Bishop.]] The surgery itself (particularly the way the device seemed to activate on its own and attaches itself to his spinal cord, the dripping blood and the ''fricking twitching'' from [[StrappedToAnOperatingTable the Observer]]) and the potential consequences. He's either going to TakeALevelInBadass or [[PowerAtAPrice bad things will happen.]]
* The wormholes in 5x05. One dimensional portals looking into [[NothingIsScarier nothing but black.]]
* "Through the Looking Glass and What Walter found There":
** The PocketDimension is a very confusing place due to its unstable physics, making it very easy to become stranded in this fun-house-like apartment world. The laws of physics seem very random, with the exit to this dimension requiring a very specific set of movements to access. You can not even trust your eyes here, as the walls or features that appear to have no depth may conceal a hidden passage inexplicably behind them. A rebel that was stranded here only survived because there happened to be perpetual source of water.
** The end of episode, Windmark watching and the PsychoStrings playing in the background do not help matters:
-->'''Observer:''' I know what you have done. You have made a grave mistake. You do not realize what is happening to you.
-->'''[[spoiler: Peter]]:''' [[NeckSnap *neck snap*]]
* Peter [[spoiler:reading Olivia's thoughts and then pulling out ''chunks of hair.'']]
* Some of Walter's hallucinations in "Black Blotter" include images of Carla Warren's burnt corpse, somehow ending up in Observer ridden Manhattan with no idea how he got there and evil!Walter starring back at him.
** Those who had bad experiences with psychedelics might find Walter's sudden shift from downtown Manhattan to the boathouse and all the requisite disorientation distressingly familiar.
* The CreepyDoll in "The Human Kind" was.... creepy.
* The ''goddamn noise'' you hear when someone is getting [[MindRape Mind Raped]] by Captain Windmark. That one, high pitched note... you hear it first and ''then'' you see his victims shaking and/or bleeding from various orifices.
** The only way to stop Windmark from brutally reading you and dooming the people you care about and/or the entire world is to either piss him off enough so he'll kill you himself or shoot yourself in the head.
* Michael, [[spoiler:Donald's ''son'', giving himself up to the Captain Windmark to save the others.]]
-->'''Windmark:''' *SlasherSmile* Hello
** What makes it worse, is how Windmark just short of gets into Michael's face.
** The whole thing regarding Michael, [[spoiler: who takes the creepiness inherent to Observers and gives it a twist, being a [[CreepyChild Child]] and an actual eccentricity even for Observers.]]
* The intros typically provide the names of fringe sciences, like teleportation, precognition, cloning, etc. For ''The Day We Died'', two additions to those lists are [[BadFuture water]] and [[CrapsackWorld hope]]. For all of season five? It lists ''Community, Joy, Individuality, Education, Imagination, Private Thought, Due Process, Ownership, Free Will, and Freedom.''