The [=Turncoat=] is the guy who switches sides at some point to help out the other side. Can be [[FaceHeelTurn a hero who turns bad]], or [[HeelFaceTurn a bad guy who suddenly decides to help the good guys]], but usually it's just anyone who thinks that the switch will benefit them personally.

If they're discovered to have been bad the whole time, they're TheMole. If they're a bad guy who's been secretly ''good'', they're the ReverseMole. If they're faking their switch, they're a FakeDefector or HeelFaceMole. If they switch back and forth, they're going through the HeelFaceRevolvingDoor. The DefectorFromDecadence often falls under this.

It's interesting to note the origins of the phrase "turn coat". Back in the day (we're talking horse and musket age) soldiers defecting to the other side would turn their coats around so the liner would face the outside, to indicate they were not a soldier of the enemy. Of course, one only did this when you were far enough away from your own lines...

Not to be confused with ''[[Literature/TheDresdenFiles Turn Coat]]''.
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!!Examples

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[[folder: Anime and Manga ]]
* ''{{Beyblade}}'': Kai Hiwatari switches sides ''six times''. First, he's part of the antagonistic Blade Sharks. Then he joins the Bladebreakers (first switch). Then he switches sides and joins the Demolition Boys (a FaceHeelTurn, and switch #2). Then he switches sides ''again'' and rejoins the Bladebreakers (three). He stays with them until he goes over to the Blitzkrieg Boys (the Demolition Boys renamed, and switch number four). His next move is to join the bad guys of season three, BEGA (five). Of course, he realizes the error of his ways and switches back again (six).
* ''Manga/{{Bleach}}'':
** Uryuu Ishida goes from being an enemy of Ichigo and the shinigami to an ally... albeit with {{loophole|Abuse}}s helping him along the way to protect his pride.
** [[BigBad Aizen]], [[TheDragon Gin]] and [[BlindJustice Tousen]] betray Soul Society to join [[CrapsackWorld Hueco Mundo]]. [[spoiler: Then [[TeamKiller Aizen]] betrays Hueco Mundo and [[HeelFaceRevolvingDoor Tousen]]. [[StrikeMeDownWithAllOfYourHatred Aizen]] and [[BestServedCold Gin]] betray each other.]]
** In the [[{{Filler}} Zanpakutou]] {{A|nime}}rc, Byakuya betrays the shinigami to side with the rebelling [[TalkingWeapon zanpakutou]]. [[spoiler: He's actually a FakeDefector.]]
* Flarejet in ''TransformersOperationCombination'', a Decepticon who used to be an Autobot and a friend of Firefoad
* Justin Law in ''SoulEater''. Appears to be working for the antagonists (of which there are a few groups), specifically Noah, with a view to uncovering the Kishin. Now, technically, this was what Shinigami ''asked'' him to do (drive Asura out of hiding by making his presence known). But his methods might not go down too well. If this is a ploy, he's [[LovesTheSoundOfScreaming really]] [[MadnessMakeover getting]] into [[SlasherSmile it]].
* ''[[Manga/TheLegendOfZelda The Legend of Zelda: Four Swords]]'': Vio ([[spoiler:FakeDefector]]) and [[spoiler: Shadow (HeelFaceTurn)]].
* ''InuYasha'': [[DarkActionGirl Kagura]] [[IJustWantToBeFree desired her freedom]] from her enslavement to [[BigBad Naraku]]. As the story develops, she helps [[ImpliedLoveInterest Sesshoumaru]] against Naraku more and more and begins to aid Inuyasha's group against him, too. [[spoiler:When she takes active measures to save [[DesignatedVictim Kohaku]]'s life, Naraku [[HeroicSacrifice finally ends hers]].]]
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[[folder: Comic Books]]
* In ''ComicBook/AllFallDown'', [[spoiler:Pronto]] becomes this in exchange for a new pair of legs.
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[[folder: Fan Works]]
* The 4th ''FanFic/TouhouM1GrandPrix'' had Utsuho, Orin, Satori & Koishi swap partners.
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[[folder:Film]]
* Cypher, in ''TheMatrix''.
* ''LittleGiants'': Spike Hammersmith when he leaves the Little Giants and plays for the Cowboys after initially joining the Giants because Danny fibbed and said he was Kevin. Considering how he was tricked into joining the Little Giants in the first place, can anyone really hold it against Spike?
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[[folder:Literature]]
* ''ASongOfIceAndFire'' is filled with these. Particularly sellswords, who will abandon battle and even turn ''against'' those who hired them and join the enemy if the tide is against them.
** Theon Greyjoy [[spoiler:is dubbed Theon Turncloak by the Northeners after he rejoins his family and betrays Robb.]]
** Because rule of the Stormlands is contested early on by three different members of House Baratheon, it becomes something of a RunningGag for any given Stormlord to rapidly change sides due to changing circumstances. Given the cynicism of the series, those that do ''not'' switch sides end up suffering for not being able to adapt.
** The Second Sons once sworn themselves to Daenerys, then they switched sides with Yunkai when they lay siege to Meereen. [[spoiler:Then its revealed they were playing FakeDefector, and were really on Daenerys side all along.]]
* ''Literature/HarryPotter'': [[spoiler:Peter Pettigrew]], who sold out two of his best friends, [[spoiler:Lily and James Potter]], to [[BigBad Voldemort]], and then framed a third friend, [[spoiler:Sirius Black]], for the whole thing. He considered turning back (just a little bit!) after [[spoiler:Harry Potter]] [[IOweYouMyLife saved his life]], but [[spoiler: the mere thought of betraying Voldemort caused his magical prosthetic arm to strangle him]].
* Esmer in ''The Last ChroniclesOfThomasCovenant'' is chronically unable to choose a side, to the annoyance of everyone involved. He has the rare distinction of being able to switch sides several times a day and the personal power to pull it off.
* ''TabletopGame/{{Warhammer 40000}}'': In Creator/BenCounter's ''HorusHeresy'' novel ''Galaxy In Flames'', [[spoiler:Lucius]] motivated by [[GreenEyedMonster envy]] of how [[spoiler:Tarvitz]] took command, betrays [[spoiler:the last survivors of Horus's treacherous attack]].
* In Creator/EdgarRiceBurroughs's ''[[JohnCarterOfMars Chessmen of Mars]]'', the ancient I-Gos is perpetually praising his days. So thorough is his admiration that he changes his loyalties on realizing who is TheHero.
-->''Then I did not fully realize the cowardice of my jeddak, or the bravery of you and the girl. [[GoodOldWays I am an old man from another age and I love courage]]. At first I resented the girl's attack upon me, but later I came to see the bravery of it and it won my admiration, as have all her acts. She feared not O-tar, she feared not me, she feared not all the warriors of Manator. And you! Blood of a million sires! how you fight! I am sorry that I exposed you at The Fields of Jetan. I am sorry that I dragged the girl Tara back to O-Tar. I would make amends. I would be your friend. Here is my sword at your feet.''
* In ''Literature/{{Discworld}}'', Nobby Nobbs is famous in times of war for exactly this. He hovers around the edge of the battlefield, swiping boots off the fallen soldiers and will just move in with whoever he thinks is winning. The generals used his uniform as an indicator to tell who was winning.
* In Mercedes Lackey's ''The Black Gryphon'', two of Urtho's generals seem to be carrying the IdiotBall for most of the book; they're constantly losing troops of all species by attempting flashy, dangerous tactics which would lead to glorious victories, if only they actually worked; it later comes to light that these losses are intentional, as they have been working for the enemy for some time.
* ''ConanTheBarbarian'':
** In ''Literature/RoguesInTheHouse'', Conan's BackStory includes being betrayed by a woman. After he's out of prison, he tracks her down and (since she is a woman) abducts her to drop her in a cesspit.
** In ''Literature/TheHourOfTheDragon'', Publio turns on Conan because Conan's presence might reveal that his wealth springs from dealing with Conan when he was a corsair.
** In "Literature/TheScarletCitadel" Amalrus, who lured Conan into an inverted CavalryBetrayal.
* Happens in JohnLeCarre, along with [[TheMole moles]], with regularity, since that's the whole point of having agents and double agents. As one character put it:
-->''Don't feel too bad. Christ himself only had twelve, and one of them was turned.''
* In ''Literature/{{Harald}}'', the leader of [[RoyalBrat King James's]] secret police betrays him when [[spoiler: James makes a HeelFaceTurn.]]
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[[folder:Live Action TV]]
* ''Series/BuffyTheVampireSlayer'': Faith (Face-Heel, then Heel-Face) and Spike (Heel-Face, then Face-Heel, then ''back'' Heel-Face). Not to mention Angel (Heel-Face when he got a soul, Face-Heel when he lost it, etc. ad nauseum). Also Andrew (Heel-Face) and Anya (Heel-Face, brief Face-Heel, then back to Heel-Face).
* AD Walter Skinner in ''Series/TheXFiles''. He started a bit shady and it looked like he was working with the Cancer Man. He turned out to be one of the few good guys at the FBI and trusted ally for Mulder and Scully. Episode "S.R. 819" paints him as a turncoat who seeks benefits for himself. He has a touching scene in hospital where he tells Scully he wishes to be helpful. Yet at the end of the episode, he refuses to support Mulder and Scully's quest.
-->'''Skinner:''' I always played it safe. I wouldn't take sides. Wouldn't let you and Mulder... pull me in.
-->'''Scully:''' You've been our ally more times than I can say.
-->'''Skinner:''' Not the kind of ally that I could have been.
---> ''(several scenes later)''
-->'''Skinner:''' So you still think this is about you? About the X-Files?
-->'''Mulder:''' Yes. Yes, I do. And I have an idea who may be behind all this. But I'd need your authority to continue the investigation.
-->'''Skinner:''' I have neither the authority nor the will to allow your continued inquiry into this matter. You'll perform your duties as directed by AD Kersh and only AD Kersh.
--->''(Mulder and Scully stare at Skinner in surprise.)''
-->'''Scully:''' Sir?
-->'''Skinner:''' This matter's closed, Agents. Am I clear?
* In ''Series/{{Lost}}'', Juliet [[HeelFaceTurn turned good]] while [[spoiler: Michael]] [[FaceHeelTurn turned bad]] [[HeroicSacrifice and then good again]].
** Ben often is in a HeelFaceRevolvingDoor, depending on who's side he's on at that moment and what his present goal is. [[spoiler: He undergoes a final HeelFaceTurn in the final episode, after Hurley offers him a second chance at redepemption, as his NumberTwo while he settles into the role as new protector of the Island]].
* In the final episode of ''Series/StarTrekDeepSpaceNine'', the Cardassian ships turn on their Dominion allies and aid the Federation Alliance fleet. Though the fact that one of their major cities on their homeworld had been wiped from the face of the planet might have had something to do with it. Gul Dukat fits this trope alone, when he realises that the military is going to be overthrown he switches to back the civilians ("Way of the Warrior")
[[/folder]]

[[folder:Video Games]]
* ''VideoGame/FinalFantasyIV'': Kain Highwind switches sides ''[[HeelFaceRevolvingDoor four times]]'' throughout the course of the game. He was under MoreThanMindControl from about one hour into the game to about one hour until the end of the game. Golbez just liked to screw with the heroes by slackening his control on Kain.
* ''FinalFantasyVII'': [[spoiler:Reeve Tuesti, controlling]] Cait Sith is TheMole for the bad guys at first, but quickly swaps sides wholeheartedly once he's found out, even taking a risk for the party through [[spoiler:sacrificing one of his puppets for their cause]].
* ''VideoGame/TalesOfSymphonia'': [[spoiler: Yuan]] switches from allying with the heroes to trying to kill them so often even the other characters comment on how hard it is to keep track. [[spoiler:It makes sense, as he's a double agent within the villains' organization, and leads his own organization opposing the villains that is easily confused with said villains. So he never really switches sides, just motives.]] Pretty much half of the cast betrays Lloyd at one point or another. [[TooDumbToLive Which makes you wonder just how naive he is]].
* Zevran from ''VideoGame/DragonAgeOrigins'' may join your party after [[spoiler:you foil his attempt to assassinate you for Loghain]]. If he does, depending on his RelationshipValues, he might later turn around and rejoin the enemy.
[[/folder]]

[[folder:Tabletop Games]]
* In {{Shogi}}, captured pieces change sides.
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[[folder:Web Comics]]
* ''Webcomic/TowerOfGod'': Rapdevil switches sides from Prince's team to Kim Lurker's defectors.
* ''ZebraGirl'': [[http://zebragirl.keenspot.com/d/20040813.html Lampshaded]] after Sam has already berated the gangsters for using cheesy movie plot lines.
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[[folder: Web Original]]
* ''SurvivalOfTheFittest'': Julie Mikan, who started off Heel did a HeelFaceTurn [[HeelFaceRevolvingDoor then managed another]] FaceHeelTurn.
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[[folder:Western Animation]]
* In ''WesternAnimation/AvatarTheLastAirbender'', Azula joins forces with the imprisoned Long Feng and takes control of his [[SecretPolice Dai Li agents]] to capture the Avatar, overthrow the king, and free Long Feng from prison. Once the Earth Kingdom is under their control, Long Feng wants to dump her and rule by himself. However, during the time of her leadership, the Dai Li have come to greatly appreciate the ability and ruthlessness of Azula, so they just ignore his order to capture her, waiting for them to prove who is more worthy of their loyalty.
* This happens a few times in ''WesternAnimation/StarWarsTheCloneWars''.
** [[spoiler:Faro Argyus]] in Season 1 episode "Cloak of Darkness". [[spoiler:He secretly works under Asajj Ventress to free Nute Gunray from Jedi custody.]]
** [[spoiler:Clonetrooper Slick]] in Season 1 episode "The Hidden Enemy". [[spoiler:It's revealed Slick was tired of being a 'slave' to the Jedi and decides to join forces with the Separatists.]]
** [[spoiler:Pong Krell]] in the Umbara arc of Season 4, who leads the 501st in the Battle of Umbara. [[spoiler:Turns out he was turning armies of clones against each other.]]
* Terra from ''WesternAnimation/TeenTitans'' manages to be both this and the mole. She starts off on the Titans side but is swayed over to Slade at the promise of him helping her control her powers, she then comes back and joins the team as TheMole.
* ''XiaolinShowdown'': Raimundo once [[FaceHeelTurn betrayed his friends]] and joined Wuya. He later [[HeelFaceTurn returned to them]]. Omi would later join Chase Young but that was justified by a Wu's effect. Raimundo also joined forces with Hannibal Roy Bean but in that case, he was just a FakeDefector.
* ''JackieChanAdventures'': Tohru's HeelFaceTurn at the end of Season 1.
* Iago in ''Disney/AladdinTheReturnOfJafar'', which gets a LampshadeHanging in ''WesternAnimation/HouseOfMouse'' where DependingOnTheWriter, Iago is either Jafar's henchman or Aladdin's sidekick.
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