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->''There were names, and lines connecting the names to other names, and some of the lines were in different colors and…\\
‘Tell me,’ said General Granger, ‘is there anyone in my army who ''isn’t'' a spy?’''
-->-- ''FanFic/HarryPotterAndTheMethodsOfRationality''

Somebody [[AWolfInSheepsClothing disguises themselves]] as a member of some group [[TheInfiltration to sneak among them]]. However, it turns out everyone else in the area is also in disguise. Primarily used in comedy.

A favorite scene is to have the primary detectives bust an operation, only to find out that the people they're busting are cops themselves. Depending on how much hilarity the writers are going for, there may be as many as three or four squads in the room at the time.

If they turn out to have been on the same side too, then it is RightHandVersusLeftHand. Sometimes the result of a GambitPileup. Might also drive a character to demand: "Okay, will the real [X] please stand up?" - and then ''everybody'' stands up.

Compare/contrast IAmSpartacus.

'''Due to the nature of this trope, spoilers abound.'''

----
!!Examples:

[[foldercontrol]]

[[folder:Anime & Manga]]
* In an episode of ''{{Slayers}} Next'', the team infiltrates a kingdom dedicated to training priestesses, and takes it so seriously it's supposedly a LadyLand which will execute any man found near its borders, never mind in the city. As it turns out, it's actually full of {{Wholesome Crossdresser}}s -- even the ''princess'' is actually the ''prince'', forced to pretend to be a girl because his crazy mother didn't want to annul the rule, yet didn't want to execute her son either.
** In another episode in ''Slayers Revolution,'' every employee and guest on the cruise ship they take turns out to have been hired by their enemies to get the [[LaserBlade Sword of Light]].
* In one of the ''ProjectAKo'' [=OVAs=], every single customer at the Lepton-mothership-turned-restaurant turns out to be a disguised spy... all for different organizations. Cue BlastOut.
* One episode of the ''{{Patlabor}}'' TV show had them helping the Japanese intelligence service pick up a Soviet defector & his experimental HumongousMecha in a seaside resort town. Every single person there was said to be a spy of some sort. The one that really takes the biscuit being:
-->"You see that dog crossing the road there? It's a Mossad spy dog!"
* This is kinda what happens in ''TheMelancholyOfHaruhiSuzumiya'', except that Kyon, the MetaGuy [[TheProtagonist protagonist]], isn't one of the "wolves" and is dragged into the title character's Club For Finding Aliens, Time-Travelers, and Espers by force. However, it soon turns out that every other member of the club (including the founder) is some kind of supernatural being that they are supposed to look for. In a way, the title character ''[[InvokedTrope invoked]]'' this trope without being aware of it, due to being a WrongGenreSavvy RealityWarper.
* The second series of ''CodeGeass'' introduces the Britannian Office of Secret Intelligence, whose entire function is to spy on Lelouch. By the middle of the series, practically the entire organisation has either been blackmailed or mind-controlled by Lelouch into working for him.
* In the ''Manga/SoulEater'' manga, we already knew Crona was acting as a spy for Medusa when the DWMA started getting suspicious. It turned out there were ''four'' spies working for three different people (Crona for Medusa, Justin for Asura, and the two women at the cabaret Spirit visits for Arachnophobia) as well as a student that was really a witch (though she wasn't a spy).
[[/folder]]

[[folder:Comic Books]]
* This happens in one of the prequel comics for ''Film/SmokinAces''.
* One strip of TwistedToyfareTheatre had Reed Richards turn into a Skrull and gloat to Susan Richards about having tricked her into having sex with him. She promptly turns into another (male) Skrull and replies "Bob, you idiot."
* MarvelComics' SecretInvasion got close to this trope at times. For example, one meeting of Marvel's Illuminati (the big movers and shakers of Earth's superheroes) ended when everyone at the table realized he was a Skrull. They hadn't even known themselves!
* In a Don Martin ''Magazine/{{MAD}}'' gag strip, all the passengers on an airplane look around shiftily. Then they all get up at the same time, brandishing a weapon, and shout "All right, nobody move! This is a hijack!" Everyone looks at each other and sits down, embarrassed.
* See the ''{{Miracleman}}'' example under NotMyDriver. To go into a bit more detail: the City was created as a place to dump all the spies whose lifetime of paranoia had left them mentally unprepared to live in a {{Utopia}}. Everyone who lives there is a spy, but they all think ''most'' of the others are the ordinary civilians they're protecting.
* One ''{{Nightwing}}'' comic featured an entire town where almost every inhabitant was someone in the Witness Relocation program.
* A sub-series of Italian stories in the ComicBook/MickeyMouseComicUniverse has Goofy writing stories in various genres. Using himself as a protagonist and Mickey Mouse as his sidekick. The stories mostly make fun of various genres and their tropes. One of "his" stories from 2003 has the duo as undercover cops posing as prisoners. Their mission being to befriend a certain prisoner and learn his secrets. They soon find out that their superiors went a bit overboard with their planning. With the exception of the secretive prisoner, the prison population consists entirely of undercover cops.
* In the ECComics Science-Fiction [=SuspenStory=] "Infiltration," a secret U.S. government agency for ferreting out Martian invaders who use hypnotic screens to disguise themselves as human beings discovers that it has been infiltrated by an alien. It turns out the agency is actually controlled by Martians, who are all too glad to rid themselves of the Earth "alien" in their midst.
* In one of Alan Moore's ''Future Shocks'' stories, a werewolf is loose on a spaceship and plans to feast on all the unsuspecting humans within. Naturally, every person on the vessel turns out to be a werewolf, to their consternation. It's implied that Earth came up with this as a means of getting rid of all the supernatural beings in their midst; the passengers shown boarding another ship at the end are all plainly vampires in PaperThinDisguise.
[[/folder]]

[[folder:Fan Works]]
* In the ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' fanfiction ''[[http://www.fimfiction.net/story/48341/changelings-changelings-everywhere Changelings, Changelings Everywhere]]'' the mane cast discovers that Rainbow Dash was a changeling all along, then that Pinkie Pie was another changeling sent to find her... the escalation doesn't really stop, but the ''story'' ends with two of the changelings [[ScrewThisImOutOfHere going to get a drink]] while everyone sorts out who's on what side.
-->"Is anyone here actually a pony? Are ponies even a real thing?"
* In the ''Franchise/HarryPotter'' fanfiction ''FanFic/MakeAWish'', all of the Death Eaters on watch when the Death Eater lair was blown up were spies; fortunately, all of them chose that moment to report to their respective organizations, so none of them were killed.
* In ''Fanfic/HarryPotterAndTheMethodsOfRationality'', Professor Quirrell decided to allow spies between the armies for the battles he sets up. It gets so out of hand, that the only answer to the question in the page quote has to be "no."
[[/folder]]

[[folder:Film]]
* Early in ''Film/MontyPythonsLifeOfBrian'', Brian's mother disguises herself as a man to attend a stoning. Every other 'man' there was also a woman wearing a beard.
** Compounded by the fact that, this being a Monty Python film, the 'women' are actually being played by male actors. So we had Terry Jones [[RecursiveCrossdressing pretending to be a woman who was pretending to be a man.]]
* In the movie ''Film/{{Traitor}}'', DeepCoverAgent Samir is tasked to place thirty suicide bombers on buses as part of a terror attack. He puts them all on the ''same'' bus...
* ''MyBlueHeaven'', a mafioso turned protected witness is accused of a crime by the local police. In order to avoid being convicted, he offers the police a deal: he knows of some mafia in the area who are looking to buy stolen goods. He gives them the information, they drop the charges. The police burst in, only to find the buyers are actually undercover FBI agents doing a stakeout.
* ''{{Freaked}}'' has Ricky [[MuggedForDisguise jack a milkman for his uniform]] to try and escape Freek Land, only to run into the rest of the freaks who also had the exact same idea. While they argue, the BigBad notices the dozen freaks dressed as milkmen from his window and [[UnusuallyUninterestingSight simply remarks that it must be a very competitive route]].
* In ''Film/TheDeparted'', the only two named members of TheIrishMob who aren't undercover cops or confidential informants are Mr. French and Fitzy.
* In ''Film/CaptainAmericaTheWinterSoldier'' it's revealed that [[spoiler:HYDRA rebuilt itself and infiltrated S.H.I.E.L.D. ''from the beginning.'' While loyal S.H.I.E.L.D. agents are implied to outnumber HYDRA operatives, there are still way too many for them count as TheMole.]]
[[/folder]]

[[folder:Literature]]
* In the ''Discworld/MonstrousRegiment'', the main character [[SweetPollyOliver disguises herself as a man to join the army,]] only to find that nearly every single member of her squad is also a woman in disguise. Even the ''very'' masculine [[BoisterousBruiser Sergeant Jack Jackrum]]. In fact, the only male is the decidedly effeminate Lt. Blouse. Their disguises, including that of the ''pregnant'' Shufti, are so effective that when they opt to try the old "pretend to be the washerwomen" trick, Blouse deems himself the only one sufficiently capable of acting female to pass muster. (And he's ''right'' -- he makes past the guards just fine, while the rest of them have rather more difficulty. The real washerwomen, who are mostly the indentured wives of the soldiers on their side, aren't fooled by Blouse's antics, but play along anyway.)
** And when the girls are put on trial for impersonating men by the StrawMisogynist army, Jackrum sends about half of the officers out of the room, and reveals to the other half he knows they're all women. Roughly a third of the army's high command turns out to be female.
** Also, one of Literature/{{Discworld}}'s [[FootnoteFever many, many footnotes]] relates how aliens have had to stop abducting people from the Earth, because so many different extraterrestrial species have been doing so, or monitoring each others' attempts to do so, that they've only succeeded in abducting other aliens. And [[BigfootSasquatchAndYeti one native with large feet]].
** ''The Discworld Companion'' describes how the [[LaResistance Turtle Movement]] in [[Discworld/SmallGods Omnia]] protects itself from the CorruptChurch by only meeting in small cells, in which everyone wears masks. Which is why the senior churchmen who are members don't know that every other senior churchman is a member as well.
* ''Literature/TheManWhoWasThursday'' by Creator/GKChesterton is about a police officer who infiltrates a group of anarchists only to discover that all of the anarchists are also policemen. The President of the anarchists turns out to be the officer who recruited all of them. [[GainaxEnding He may or may not also be God.]]
* ''Let's Go to Golgotha'' by Garry Kilworth is about time travel tourism where one of the most popular trips is Christians travelling back in time to witness the Crucifixion. The tourists are disguised as Jewish citizens. In the end, the protagonist suddenly realizes that the crowd condemning Jesus to the cross is composed entirely of tourists from the future, and that no actual Jewish Jerusalemites of 33 A.D. are present at all.
* PhilipKDick wrote a story called ''The Eyes Have It'' where an InspectorJavert character who hunts aliens (indistinguishable from humans except for glow-in-the-dark eyes) and dissects them informs his superiors that there is an [[TheMole alien spy]] among them. It turns out they are all aliens except him.
* HarryHarrison's ''Literature/BillTheGalacticHero'' had Bill getting recruited by an insurgency and then by military intelligence; eventually a bust occurs and every insurgent turns out to be (or at least says they're) working for the military.
* One of Creator/StanislawLem's Ijon Tichy stories from ''Literature/TheStarDiaries'' has a planet full of agents disguised as robots trying to infiltrate an evil computer's (nonexistent) robotic army.
* In ''Literature/GoodOmens'':
-->"The park was deserted except for a member of [=MI9=] trying to recruit someone who, to their later mutual embarrassment, would turn out to be also a member of [=MI9=]."
* The novel ''Beach Music'' contains a dark take or two on this. In one case, Capers, a member of the main character's TrueCompanions, joins an anti-UsefulNotes/VietnamWar student group with Shyla (another member of the nakama, and becoming her lover along the way) only to betray both the anti-war group and the nakama by having been an undercover agent the whole time. He tries to minimize the damage by saying that Shyla and the others were just innocent dupes, and the leader of the group was the real trouble. Turns out the group leader was also an agent.
** Another case is something of an inversion. An undercover police officer tries to turn a peaceful student rally into a riot, but is caught and kicked out immediately because they realize he's much too zealous and dressed like too much of a stereotype to possibly be real.
* In the Literature/TimeWars novel ''The Pimpernel Plot'' there's a scene where, apart from Literature/TheScarletPimpernel and his nemesis, everybody in the room turns out to be an undercover time traveller, with about half of them working for the villain and the other half there as backup for the heroes. ([[MythologyGag Possibly a bonus in-joke for readers familiar with the source novel]]: in the original version of the scene, apart from the Pimpernel and his nemesis, the room is empty.)
* Friedrich Dürrenmatt's comedy/tragedy/drama ''The Physicists'' takes place in an asylum for {{Mad Scientist}}s. As it turns out, however, none of the three eponymous physicists is actually insane: one of them is ObfuscatingInsanity to prevent worldly authorities from exploiting his scientific breakthrough, and the other two are undercover agents from CIA and GRU planted there to convince him to cooperate with their respective governments. And ''then'' it turns out that the female head of department of the asylum is the only one who ''really is'' insane.
* TimDorsey does this twice with his ''Florida Roadkill'' books. The first time, undercover agents of three different law enforcement agencies infiltrate a drug ring and try to bust each other (leading them to wonder if all drug dealers in Florida are secretly undercover cops). The second time, a group of people planning to overthrow Castro is composed almost entirely of agents of Cuban intelligence. The only exception is a retired CIA officer. The sad thing is that they all know it and yet they still make plots they have no intention of implementing and send reports back to Cuba about what was discussed in the meetings.
* In HarryHarrison and Ant Skalandis's novel ''Deathworld vs. Filibusters'', the Pyrrans have finally managed to defeat the pirates only to find out that Henry Morgan, pirates' leader, and several of his {{Number Two}}s were working for various agencies all this time, all under deep cover in order to expose the entire organization. The Pyrrans don't care and execute Morgan for all he has done (being an agent doesn't excuse murdering and pillaging).
* In Mother Night, one soviet spy is called a failure for "building an espionage apparatus entirely out of CIA infiltrators." But the joke's on the CIA: he never cared about spycraft, and just used the KGB's money to fund his art, which is entirely apolitical.
* A variation in ''Literature/TheDresdenFiles'' book ''Literature/DeathMasks'', where Harry appears on a TV programme so that he can have an inconspicuous meeting with one of the other guests. He soon discovers that the other two guests separately appeared on the show in order to have inconspicuous meetings with him on business that is completely unrelated to the other people there. The stress from the meetings causes him to lose control of his magic, and the damage he does to the TV cameras and other equipment results in a years-long series of lawsuits that are a RunningGag throughout the series.
** That one is a double whammy: the program in question was a debate about the existence of the supernatural, and everyone taking part in the debate either has magical talents or is some kind of supernatural being.
* In the Literature/RepairmanJack series, the [[ChurchOfHappyology Dormentalist]] higher echelons consist entirely of people who are desperately hiding the fact that they're "Nulls", meaning that they've failed to develop the psychic powers promised to devout Dormentalists. Naturally, the leader of the cult introduced the concept of "Nulls" specifically because he knew they never would gain such powers, as the faith's core creed is a load of garbage.
[[/folder]]

[[folder:Live Action TV]]
* In an episode of ''{{Cybill}}'', Cybill dressed up as a prostitute to research an acting role she'd accepted. She asked another lady of the night what it was like being a prostitute, but it turned out she was also an actress. They asked a third woman, but she turned out to be a journalist. The three asked a fourth woman, but 'she' turned out to be a male vice squad officer.
* In a really funny season opener of the short lived show ''Series/TheAgency'', there was a bust of suspected terrorists, and it turned out it was [[http://www.youtube.com/watch?v=g39xIewgGaM all undercover cops ]]from different agencies.
* ''Series/SaturdayNightLive'' had a sketch called "Narc School" about a HighSchool where every single student was really an undercover narcotics agent.
* ''TheMaryTylerMooreShow'' had an episode where Mary and Rhoda join a dating club for divorced people despite being single rather than divorced. At the end of the episode, it turned out that everyone there was single and not divorced except for the club founder.
* ''LawAndOrderSVU'' had the team attempt to infiltrate a pedophile "club" of sorts...only to discover that some other organization (FBI, most likely) was also setting up a sting operation. An exasperated Captain Cragen wonders aloud if this inability of the Good Guys to work together is why the Bad Guys keep staying ahead.
* The Original Flavour ''Series/LawAndOrder'' had a ([[AlwaysMurder lethal, naturally, considering this series]]) fallout from such an event during the 60s, where it turned out several supposed Communists/Hippie Protesters were actually cops and other agents spying on each other, and being purposely kept in the dark.
* More [[HilarityEnsues hilariously]], ''{{Reno911}}'' did this with a drug sting.
* ''Series/{{CSI}}'' also did this with gun runners.
* ''Series/{{NCIS}}'', too, when Tony and Ziva acted as an assassin couple.
* In an episode of ''Series/{{Frasier}}'', the son of a wealthy woman is trying to prevent Frasier from hitting her up for a donation (to save his old school, which is on the verge of bankruptcy). Niles distracts the son by saying one of the caterers at the party is trying to get her to finance a play. When the son asks out loud if any of the caterers are trying to get a play financed, they surprisingly all raise their hands.
* There was an episode of ''Series/GetSmart'' where Max becomes a DoubleAgent to infiltrate a KAOS cell, but it turned out everyone in the cell was from another agency (FBI, CIA, Naval Intelligence, & Scotland Yard).
* An ep of ''NightCourt'' had the FBI run a sting on a visiting judge using Dan as a shill, attempting to get Dan to catch the judge on tape trying to bribe Dan; turned out a different group of FBI agents was running a sting on Dan using the judge, trying to get Dan to take a bribe. Both groups of agents burst in, and recognize each other...
--> "BERT?"\\
"Ernie?"
* One sketch in ''DoNotAdjustYourSet'' has a very blatant policeman trying to infiltrate a criminal gang while they're planning a robbery. Eventually it turns that everyone there is a undercover agent of some sort. They decide to go along with the robbery anyway.
* In the ''Series/MacGyver'' episode "Honest Abe", Mac gets shanghaied by his CIA agent friend Abe to take down a South American dictator and a corrupt Army Major (played by Ben Stein) supplying the former with weapons. Eventually, one of the Major's lackeys reveals to the other he's an FBI agent seeking to bring down the Major and promises him immunity if he cooperates... and the other lackey replies he doesn't have to since he's also an undercover agent for Office of Budget and Management. And via background checks they discover that Abe is a CIA agent (they thought he had retired) and Mac is with the Phoenix Foundation. Naturally they are dumbfounded at the revelation that they are involved in an operation involving ''four'' secret agents of different agencies while they previously thought they were acting alone.
* In a ''Series/TheDailyShow'' episode spoofing {{Chatroulette}}'s recent media attention, Jon decides to try it out. Besides a couple of people showing their junk, everybody Jon encounters is either a reporter or another Daily Show correspondent. When he gets to Katie Couric, she even complains that she is trying to do a piece on Chatroulette but so far she only got reporters.
* Parodied on ''Series/{{The Office|US}}'', where ''every single'' member of a gun standoff turns out to be a double agent.
* Humorously referenced on ''StarTrekVoyager''. In the pilot episode Maquis rebel Chakotay finds out his First Officer Tuvok is a Starfleet undercover agent working for Captain Janeway. Later on in the season he finds out his girlfriend Seska is a spy for the Cardassians. In fact, she ''is'' a Cardassian.
-->'''Chakotay:''' You were working for her, Seska was working for them -- was anyone on that damn ship working for me?
* In the ''Series/DoctorWho'' episode "The Time of the Angels", the Doctor and River search for a [[NobodyHereButUsStatues Weeping Angel]] in a cavern that they think is full of ordinary statues. They're wrong.
-->'''Amy:''' Wait, you said the Aplans have two heads, right?\\
'''Doctor:''' Yes, of course.\\
'''Amy:''' So...why do all the statues [[OhCrap only have one]]?
* In ''Series/AgentsOfSHIELD'', it slowly becomes clear that every single member of TheTeam on [[CoolPlane the Bus]] except for Coulson is spying on ''someone'', whether it be Coulson, each other, or just S.H.I.E.L.D. in general.
** Skye is a mole for [[spoiler:the Rising Tide, an Anonymous expy hacktivist organization. Coulson wins her over relatively quickly though, convincing her that if S.H.I.E.L.D. is Big Brother, it's [[BigBrotherInstinct a protective and well-meaning one]] that just goes overboard sometimes]].
** May is a mole for [[spoiler:Director Fury, of all people, sent to keep an eye on Coulson and make sure [[CameBackWrong nothing went wrong with his resurrection]]. She also built the team (by providing Fury with a list of roles which he translated into a mission order to give to Coulson) so that she could take Coulson down and repair him if it became necessary]].
** Ward is a mole for [[spoiler:HYDRA and its Centipede program, searching for the secrets of Coulson's resurrection. He seduced May in order to cement his cover--unaware that [[{{Irony}} she had all the information he needed]]]].
** [=FitzSimmons=] are a mole for [[spoiler:no one, at least at first. Mostly they just had the bad luck to end up in the middle of a bunch of conspiracies. They do start working against Coulson when he won't let them properly study the drug that brought him back to life, though. They want to hook it up to a S.H.I.E.L.D. mainframe to figure out how to mass-produce it and save countless lives, while he is freaked out about where it came from and possible side effects]].
** And then of course we have [[spoiler:Coulson himself. He was in charge of the T.A.H.I.T.I. project that was working on the drug to bring back an Avenger in case they fell in battle, and recommended it be shut down since there were horrific side effects and the only thing that ''barely'' worked was erasing all memory of the treatment from the subjects' minds. He became its first success, but a few days after he discovered this, he began to exhibit those psychological side effects himself]].

[[/folder]]

[[folder:Music]]
* TomLehrer introduced his song "The Wild West is Where I Want to Be" by saying, "A few years ago I worked for a while at the Los Alamos scientific laboratory in New Mexico. I had a job there as a spy. Now, I guess you know that the staff out there at that time was composed almost exclusively of spies... of one persuasion or another."
* One of the vignettes in TheBonzoDogDooDahBand's "Rhinocratic Oaths" sees a disguised police sergeant carrying out a sting operation at a gay bar (homosexuality being illegal in Britain before 1966), only to find that all the other patrons are policemen... [[SubvertedTrope who beat him up]].
[[/folder]]

[[folder:Newspaper Comics]]
* The TropeNamer, even if it doesn't use those words in the caption, was a comic from ''TheFarSide'', where a wolf fashioned a crude sheep costume to infiltrate a flock of sheep that turned out to be comprised entirely of wolves in sheep costumes.
** In another one, a guy is standing in a crowd of people in front of a mirror, yelling 'the vampires are everywhere'. Meanwhile, across the street there's a pair of workers hauling a large mirror, and the man screaming about vampires is the only person with a reflection.
* A Creator/GahanWilson cartoon in ''Magazine/{{Playboy}}'' showed Hispanic-looking revolutionaries overrunning the dictator's office. The dictator, confronting the revolutionary leader, snarled, "You fool — I'm CIA, too!"
[[/folder]]

[[folder:Tabletop Games]]
* Occurs in ''TabletopGame/{{Paranoia}}'' with The Industrial Workers of the World (Wobblies), introduced in the supplement ''Acute Paranoia'' (1986). When Friend Computer [[GossipEvolution heard about]] this secret society, it sent Troubleshooters to infiltrate it and report back to Internal Security; however, since the RealLife Wobblies fell apart before Alpha Complex was created, [[ShootTheMessenger they were executed]] for [[FailureIsTheOnlyOption failing to find it]]. After several iterations, one clever team ''[[TakeAThirdOption created]]'' the Wobblies so they'd have something to "infiltrate". At first, ''every single member was an [=IntSec=] spy'', but later they started finding "real" members of the society... who were actually spies from ''other'' secret societies.
** ''Paranoia'' in general lives on this trope. The {{PC}}s are charged by The Computer to hunt down mutants and secret society members. Every PC is both a mutant and a secret society member.
[[/folder]]

[[folder:Video Games]]
* In ''VideoGame/{{Prototype}}'', the game devolves into a three-way war between the [[ZombieApocalypse infected]], [[EvilArmy Blackwatch]], and the player character, [[HumanoidAbomination Alex Mercer]]. ''VideoGame/{{Prototype 2}}'' seems to have the same setup (albeit with a new protagonist and Alex now leading the infection), but as the game progresses, it's revealed that practically half of Blackwatch is secretly working for Mercer.
* In ''VideoGame/MetalGearSolid2'', the confederacy of terrorists Raiden fights against has six key leaders: Solidus, Fortune, Ocelot, Olga, Vamp and Fatman. Of these characters three are secretly operating on behalf of the Patriots (Olga, Ocelot and Fatman) and one is secretly operating on behalf of Naomi Hunter (Vamp). Only Solidus and Fortune aren't answering orders from outside parties. However, Fortune was plotting to betray Solidus, who himself had anticipated her betrayal and was plotting to betray Dead Cell.
* [[http://cheezburger.com/7866688000 This comic]] about Wonder Trading in ''VideoGame/PokemonXAndY'' (a new feature in which you trade Pokémon with a random player without knowing what you're going to get).
* Get caught cheating in ''VideoGame/TitanFall'', and you will only be able to connect to servers reserved for cheaters.
* The basic premise of ''VisualNovel/VirtuesLastReward'' is that nine people are kidnapped and forced to play a DeadlyGame by someone called 'Zero'. As it turns out, [[spoiler:four of the players actively worked to create the game, and the other four know who Zero is, or can at least make an educated guess]]. The only people who are as innocent as they claim are [[spoiler:K and Quark]], given that [[spoiler:Alice probably knows everything Clover does]].

[[/folder]]

[[folder:Webcomics]]
* Happened in the first ''SpyingWithLana'' storyline when [[http://harrington-artwerkes.com/Lana2.htm the good guys kept getting meaningless assignments.]] ({{NSFW}}). The one in the story was actually a plot by the chief to fish out the double agent behind it.
* [[http://adventurers-comic.com/d/20011120.html One of Khrima's plans]] in ''Webcomic/{{ADVENTURERS}}!''
* [[http://www.oglaf.com/kingshaped/1/ One strip]] of ''Webcomic/{{Oglaf}}'' (warning, rest of comic is '''''very''''' {{NSFW}}.)
-->'''Shapeshifter:''' Well, now I just feel like an idiot.
* ''Webcomic/DarthsAndDroids'' has an noncanon [[http://www.darthsanddroids.net/episodes/0411.html outtake strip]] in which Jim gets paranoid after encounters with shapeshifters and clones and says that [[TheyLookLikeUsNow anyone could be a shapeshifter clone]]. At which point the entire Jedi Council confess to being shapeshifting clones.
* ''Buttersafe:'' [[http://buttersafe.com/2013/06/27/wolf-in-sheeps-clothing/ Literal example.]] But then it gets recursive...
[[/folder]]

[[folder:Web Original]]
* [[http://www.theonion.com/content/node/27823 This]] article from ''TheOnion'' (which parodies the rumor that most of the members of the Ku Klux Klan being mostly run by undercover policemen). Conversely, they also once made a reference to a child porn site being busted by authorities, and every single visitor to the site claimed to be a concerned citizen trying to infiltrate the site and bring it down from the inside.
* The premise of [[http://www.collegehumor.com/video/3602789/all-ra-floor this]] ''Website/CollegeHumor'' sketch is that at one time, Kwantlen University accidentally put all the Resident Advisers on one floor. HilarityEnsues as they gather around for a fun meeting not knowing that they're all Resident Advisers.
* The girl in [[http://notalwayslearning.com/parlez-snooze-francais/30746 this]] story from ''[[Website/NotAlwaysRight Not Always Learning]]'' deliberately says something rude in French to the class, to prove to her teacher that she's the only one in the class ''not'' using an online translator for her homework.
[[/folder]]

[[folder:Western Animation]]
* ''WesternAnimation/TheSimpsons''
** In one episode Bart went to an auction to mess with the bids. When he won, he snickered and bolted for the door. At which point the auctioneer awarded it to the second highest bidder... who also snickered and bolted for the door. It is revealed that ''no one'' placed a serious bid for that item.
** Another episode had Lisa pretend to be part Native American. When she confesses her fraud during a Native American conference, almost everyone there reveals they were faking their ancestry as well, including one guy who was [[TotemPoleTrench two dwarfs in a raincoat for some reason]]. Ironically, Homer then mentioned that their family actually ''does'' have Native American ancestry.
* The ''DogCity'' episode "Disobedience School" had Bugsy Vile taking over the school and trying to turn the students into delinquents. After the climax, all students in his class turned out to be infiltrators from various police agencies.
* On ''{{Duckman}}'', a televangelist hosted a forum of other religious figures, who at the end were revealed to be fakes - except for the Ayatollah, who just wanted to improve his image in the states.
* In ''SpongeBobSquarePants'', Squidward and [=SpongeBob=] enter a dance contest together, with Squidward inside [=SpongeBob=] doing all the dancing. When they are found out and disqualified, all the other contestants reveal that they too had help. The prize went to the only one who danced on his own: Patrick, who was actually rolling on the floor because of a cramp.
** Similarly, Spongebob once tried to disguise as Mister Krabs when he molted his shell so he wouldn't look like a sissy in front of his old buddies; once Mister Krabs makes his confession, the others all reveal that they, too, had something to hide.
* In an episode of ''TheAdventuresOfJimmyNeutron'', a picnic is accompanied by a series of parent-child games. Jimmy, who naturally despairs of [[BumblingDad Hugh]] winning anything unassisted, invents something that more or less instills hypercompetence in athletics. When [[TheRival Cindy]] wins after the device malfunctions, it's revealed that her "mother" is actually her bodybuilding aunt, which would mean the prize goes to the Neutrons - except that they fess up to cheating as well, at which point the presenter runs through every team present until near-terminally unathletic Carl and his father are revealed to be the only ones who haven't cheated in at least one of the events.
* PlayedForDrama in ''WesternAnimation/BatmanBeyond'' - Terry attempts to stop an illegal weapons sale, but it turns out the 'dealers' were actually Gotham PD. When Batman intervenes, the buyers run for it and get away. Commissioner Barbara Gordon chews him out for his rash behaviour. "It took us two months to set up that sting, and two minutes for you to ruin it!"
* On ''InvaderZim,'' [[VillainProtagonist Zim]] and [[CloudCuckooLander GIR]] were once captured by even stupider aliens who thought they were an actual human and dog. These aliens' disguises were [[PaperThinDisguise even more pathetic]], such as human masks that they held to their faces with sticks.
* ''WesternAnimation/TeenTitans'' has a PlayingWithATrope example. After finding not one but ''two'' undercover heroes, Brother Blood suspects this of the H.I.V.E Academy. "Was ''anyone'' in my school actually there to '''LEARN'''?" They were the only moles at the time but another student has a HeelFaceTurn later on.
* In the ''WesternAnimation/WanderOverYonder'' episode "The Bad Guy", Doomstone ''appears'' to be a WretchedHive, but all of its inhabitants are merely pretending to be cutthroats and badasses - because they assume everyone ''else'' is the genuine article.
* ''WesternAnimation/{{Futurama}}'' featured an episode of robot soap opera ''All My Circuits'', wherein a "Previously On..." segment featured several clips of characters claiming they had amnesia. This culminated in a scene where Calculon sat all the characters down in a room and demanded, "Does anyone here ''not'' have amnesia?" No one can answer.
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[[folder:Real Life]]
* Depressingly enough, this has been TruthInTelevision at times. There's more than one incident on record where the "crooks" caught by a sting operation turn out to be officers running a sting for some other agency.
** Cops busting undercover cops is also done deliberately at times, to justify bringing a deep-cover asset out without blowing the asset's cover. So far as the crooks are concerned, their trusted colleague has merely been arrested and jailed.
* ImageBoards like 4chan, which usually consists of {{Troll}}s trolling Trolls.
** 4chan is so well known for its trolls, that some have become regular entertainment. The trolls, who feel they're losing their edge, mix it up a bit by trolling the other forum-goers by either being an incredibly obvious troll or simply not trolling. This enrages the others, since they have come to expect trolling, and aren't quite used to trolls who troll by ''not'' trolling. And now the word "troll" has lost all meaning to you.
* Famously, during the [=McCarthy=] era in the USA, the FBI had many of its members infiltrate the American Communist Party. It was estimated that, at its peak, approximately ''two-thirds'' of the American Communist Party consisted of operatives on the FBI payroll.
** Similarly, the Communist Party of Great Britain during the Cold War consisted in around a 35-35-30 split of Security Service agents, KGB agents, and genuine members...many of whom would either quit or join one of the other two groups.
* Wiki/{{Conservapedia}}. Trying to separate the trolls from the genuine maniacs is a MindScrew of a task, not helped by the fact that people are judged there mostly by how much they suck up to the site's SmallNameBigEgo founder.
** One time, the wiki's creator decided to purge a large amount of the accounts. It's been said that he banned all the legitimate users, but kept the trolls. This overlaps with PoesLaw.
** The SomethingAwful presence on the conservative "alternative to facebook", The Tea Party Community, is a particularly wonderful example of this - at this point it's not clear how many normal users of the site there even are anymore, mixed in with all the SomethingAwful trolls, trolls pretending to not be trolls, people trolling them intentionally... and trolls from other places, who don't necessarily realize it's been taken over by SA.
* Tales abound of {{Agent Provocateur}}s infiltrating student political societies in the US only to find that the most radical elements are agents from a different source and all the actual students are perfectly reasonable and unobjectionable people.
* Supposedly when the Allies got hold of Nazi records at the end of UsefulNotes/WorldWarII, they learned that every German spy in Britain had been found and turned into a double agent by Allied intelligence.
** Check "Double Cross System" in that other wiki over there. It was the most brilliant tour-de-force of British intelligence: they managed to find out and turn '''every single German agent''' that the Germans sent to Britain during the whole war. The head of the "Double Cross System", John C. Masterman, estimated that, by '''1941''', the MI5 actively ran and controlled the German espionage system in the United Kingdom. ''And he was right''.
*** Of course, the head of the ''Abwehr'', Admiral Canaris, [[MoleInCharge was deliberately sabotaging Nazi intelligence operations from the inside and feeding British Intelligence information at the time]].
*** It got to the point that MI5 had to actually jail some of the spies that landed in Britain, rather than letting them report back false information. If it seemed that ''nobody'' had gotten caught, after all, the Nazis would've found that suspicious.
* The classic shell game scam will often feature a crowd of what appear to be pedestrians, taking interest in a supposedly legitimate game of chance. The odds are that ''everyone'' in that crowd is in on the scam, except for you (the mark).
* It is said that the only reason the Ku Klux Klan is still around is the undercover police agents -- they're the only members who reliably show up for meetings and pay their dues on time.
* A sad case seems to be the German extreme right-wing party NPD (Nationaldemokratische Partei Deutschlands, National-democratic Party of Germany, yeah, there still are those around, too). They are infiltrated heavily by the Verfassungsschutz (Protectors of the Constitution, Germany's domestic intelligence agency). How heavily, you ask? When talking about disbanding the party, the highest court ruled that with so many protectors in the party - which would all be exempt from prosecution - any abolishment trial would be doomed to fail.
** The saddest thing about this? It seems that many of these planted moles are using their immunity and the paycheck from the Verfassungsschutz to actually help the party to survive. In one case, a high member of the NPD stated openly that without being paid from the Verfassungsschutz, he wouldn't have been able to build up the party's branch in his state.
*** This might become FridgeHorror when you remember what happened the last time [[http://en.wikipedia.org/wiki/NSDAP#Origins_and_early_existence:_1918.E2.80.931923 the German authorities decided to send agents to infiltrate a small extremist nationalist party.]]
* In the former EastGermany, the [[StateSec Stasi]] made generous use of informers in the population to spy on antigovernment forces. So many, in fact, that the BBC reported that as many as one in seven East Germans were on the Stasi's payroll.
* It's standard practice for many live-action roleplay events, such as dinner-theater murder mysteries, to assign ''everyone'' a hidden agenda and/or a motive to kill the designated victim.
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