History Main / SpotTheImposter

10th Sep '17 4:21:58 AM StFan
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* Subverted in a filler arc of ''Manga/{{Bleach}}'', specifically anime episode 326. While Captain Hitsugaya is fighting Reigei!Momo Hinamori, the real Momo appears and attacks Reigei!Momo. Hitsugaya has to figure out which one is the real Momo so he can defend her from Reigei!Momo's attack. Then, once he makes his choice, to his surprise the Momo he's protecting [[spoiler: stabs him, revealing that both of them are Reigei!Momo. They then team up to try to kill him]].

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* Subverted in a filler arc of ''Manga/{{Bleach}}'', specifically anime episode 326. While Captain Hitsugaya is fighting Reigei!Momo Reigei-Momo Hinamori, the real Momo appears and attacks Reigei!Momo. Reigei-Momo. Hitsugaya has to figure out which one is the real Momo so he can defend her from Reigei!Momo's Reigei-Momo's attack. Then, once he makes his choice, to his surprise the Momo he's protecting [[spoiler: stabs him, revealing that both of them are Reigei!Momo.Reigei-Momo. They then team up to try to kill him]].



* ''DragonCollection'' plays this trope straight a few times, both for drama and for laughs.
* ''Manga/FairyTail'': [[spoiler:Heroic version. Earthland Erza manages to trick Faust and his soldiers before the Edolas!Erza shows up. Edolas!Erza cuts her hair later to keep it from happening again]].

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* ''DragonCollection'' ''VideoGame/DragonCollection'' plays this trope straight a few times, both for drama and for laughs.
* ''Manga/FairyTail'': [[spoiler:Heroic version. Earthland Erza manages to trick Faust and his soldiers before the Edolas!Erza Edolas-Erza shows up. Edolas!Erza Edolas-Erza cuts her hair later to keep it from happening again]].



[[folder:Comics]]

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[[folder:Comics]][[folder:Comic Books]]



** A ''Comicbook/FantasticFour'' and ''Comicbook/SpiderMan'' story resolved the situation of the Chameleon impersonating Spider-Man in a distinctive manner. The Thing, holding one in each hand, throws both several meters into the air. The Chameleon reveals himself by screaming in terror and the Human Torch flies up to catch him while the real Spider-Man, who is used to this kind of situation, calmly shoots a webline to swing to safety.

to:

** A ''Comicbook/FantasticFour'' and ''Comicbook/SpiderMan'' ''ComicBook/SpiderMan'' story resolved resolves the situation of the Chameleon impersonating Spider-Man in a distinctive manner. The Thing, holding one in each hand, throws both several meters into the air. The Chameleon reveals himself by screaming in terror and the Human Torch flies up to catch him while the real Spider-Man, who is used to this kind of situation, calmly shoots a webline to swing to safety.



* ''ComicBook/GoldDigger'' plays with this trope. {{Shapeshift|ing}}er Madrid arranges to disguise herself as [[TheHero the Heroine]], Gina Diggers. She then arranges for the real Gina to act out of character in several suspicious ways (an out-of-date outfit, etc.), while trapping herself for Gina's companions to find. As a finishing touch, during the confrontation with Gina, she uses the "[[strike:shoot us both]] lock us both up" subversion to win the trust of the others.

to:

* ''ComicBook/GoldDigger'' plays with this trope. {{Shapeshift|ing}}er Madrid arranges to disguise herself as [[TheHero the Heroine]], Gina Diggers. She then arranges for the real Gina to act out of character in several suspicious ways (an out-of-date outfit, etc.), while trapping herself for Gina's companions to find. As a finishing touch, during the confrontation with Gina, she uses the "[[strike:shoot us both]] lock "lock us both up" subversion to win the trust of the others.



* Somewhat complicated version in a ''Comicbook/NickFury'' comic: Fury is battling Baron von Strucker, the head of ComicBook/{{HYDRA}} in his soon to be CollapsingLair, but he has to disguise himself as Strucker using a convenient masking device in order to commandeer a plane out. However, he also sets up Strucker's death by first disguising Strucker as Fury and then putting a ''second'' mask on Strucker so he's wearing his own face on top of Fury's. Result? HYDRA troops burst in and see two Struckers fighting. Fury-disguised-as-Strucker convinces the HYDRA troops he's the real Strucker by yelling louder and ordering troops to remove Strucker-as-Fury-as-Strucker's mask, so the troops comply. Strucker panics and dives into the alpha particle generator, dying. Fury-as-Strucker jets off. A bit of FridgeLogic: Fury wears an {{eyepatch|OfPower}}, while [[http://www.marveldirectory.com/individuals/b/baronstrucker.htm Strucker]] wears a monocle. Where did Fury get two eyepatches and two monocles from?
* ''Comicbook/ArchieComicsSonicTheHedgehog'' had an extended version in which the changes of Antoine were revealed to be him having been replaced with his MirrorUniverse counterpart, who had promptly set to political maneuvering and nearly arranged to become king of Mobius before Sonic finally Spotted The Impostor. (Antoine, meanwhile, had been dumped in his counterpart's place and had been [[ImpersonatingTheEvilTwin doing his best to play evil]] to keep anyone from catching on.)

to:

* Somewhat complicated version in a ''Comicbook/NickFury'' ''ComicBook/NickFury'' comic: Fury is battling Baron von Strucker, the head of ComicBook/{{HYDRA}} in his soon to be CollapsingLair, but he has to disguise himself as Strucker using a convenient masking device in order to commandeer a plane out. However, he also sets up Strucker's death by first disguising Strucker as Fury and then putting a ''second'' mask on Strucker so he's wearing his own face on top of Fury's. Result? HYDRA troops burst in and see two Struckers fighting. Fury-disguised-as-Strucker convinces the HYDRA troops he's the real Strucker by yelling louder and ordering troops to remove Strucker-as-Fury-as-Strucker's mask, so the troops comply. Strucker panics and dives into the alpha particle generator, dying. Fury-as-Strucker jets off. A bit of FridgeLogic: Fury wears an {{eyepatch|OfPower}}, while [[http://www.marveldirectory.com/individuals/b/baronstrucker.htm Strucker]] wears a monocle. Where did Fury get two eyepatches and two monocles from?
* ''Comicbook/ArchieComicsSonicTheHedgehog'' ''ComicBook/ArchieComicsSonicTheHedgehog'' had an extended version in which the changes of Antoine were revealed to be him having been replaced with his MirrorUniverse counterpart, who had promptly set to political maneuvering and nearly arranged to become king of Mobius before Sonic finally Spotted The Impostor. (Antoine, meanwhile, had been dumped in his counterpart's place and had been [[ImpersonatingTheEvilTwin doing his best to play evil]] to keep anyone from catching on.)



* ''Franchise/GIJoe''

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* ''Franchise/GIJoe'' ''Franchise/GIJoe'':



[[folder:Comic Strips]]
* One week-long arc in ''ComicStrip/{{Dilbert}}'' had the PointyHairedBoss abducted by aliens and replaced by a double. Everyone in the office immediately realizes this because the double is competent and possesses people skills. Due to the differences being good ones, they don't even ''try'' to save the real boss (who frees himself by accident when he teaches them Earth management techniques, causing the UFO to crash after the captain downsizes half the crew).
[[/folder]]



* In ''{{FanFic/Doppelganger}}'', the Dark Doppelgangers have red eyes, which can distinguish them from their normal counterparts. However, Prussia has red eyes as well, making him identical to his. New Zealand solves this by punching them both in the face, as the doppelgangers have a nigh instant healing factor.

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* In ''{{FanFic/Doppelganger}}'', ''Fanfic/{{Doppelganger}}'', the Dark Doppelgangers have red eyes, which can distinguish them from their normal counterparts. However, Prussia has red eyes as well, making him identical to his. New Zealand solves this by punching them both in the face, as the doppelgangers have a nigh instant healing factor.



-->'''Wolverine:''' You're a dick.\\

to:

-->'''Wolverine:''' --->'''Wolverine:''' You're a dick.\\



* ''Literature/{{Goosebumps}}''

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* ''Literature/{{Goosebumps}}''''Literature/{{Goosebumps}}'':



* ''Series/{{Cleopatra 2525}}'' has both the original and the imposter believing they are the true version.

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* ''Series/{{Cleopatra 2525}}'' ''Series/Cleopatra2525'' has both the original and the imposter believing they are the true version.



* During the episode of ''Series/MysteryScienceTheater3000'' when they riffed on ''Film/TheGiantSpiderInvasion'', a ([[CreepyMonotone painfully obvious]]) pod-person duplicate of Servo shows up on the ''Satellite of Love'', forcing Crow and Mike to quiz them to decide which is the real one.
-->'''Crow:''' Okay, what condiment did I pour into your sneakers only two weeks ago?
-->'''Servo:''' Oh! Ah, uh...
-->'''Pod Servo:''' Was it... ketchup.
-->'''Crow:''' Yes!
-->'''Servo:''' Damn, you ''are'' me! Gee, I guess I am a fraud...

to:

* ''Series/MysteryScienceTheater3000'':
**
During the episode of ''Series/MysteryScienceTheater3000'' when they riffed on ''Film/TheGiantSpiderInvasion'', a ([[CreepyMonotone painfully obvious]]) pod-person duplicate of Servo shows up on the ''Satellite of Love'', forcing Crow and Mike to quiz them to decide which is the real one.
-->'''Crow:''' --->'''Crow:''' Okay, what condiment did I pour into your sneakers only two weeks ago?
-->'''Servo:'''
ago?\\
'''Servo:'''
Oh! Ah, uh...
-->'''Pod
uh...\\
'''Pod
Servo:''' Was it... ketchup.
-->'''Crow:''' Yes!
-->'''Servo:'''
ketchup.\\
'''Crow:''' Yes!\\
'''Servo:'''
Damn, you ''are'' me! Gee, I guess I am a fraud...



* ThoseWackyNazis have created {{doppelganger}}s of the two female members of ''Series/{{Danger 5}}''. Tucker starts by asking Claire some personal questions, but both know the answer. Pierre says that while memories can be duplicated, emotions cannot. So Tucker starts playing the flute until the real Claire starts crying, leading him to BoomHeadshot the imposter. This technique won't work on Ilsa as "[[MotherRussiaMakesYouStrong Russians don't have emotions.]]"
-->'''Jackson:''' The cloned Ilsa will tell me whatever she thinks I want to hear to stay alive. But the real Ilsa...I don't know what she wants, and I don't think she'll ever really know. So...why shouldn't I kill you?
-->'''Fake Ilsa:''' So we can spend the rest of our lives together?
-->'''Jackson:''' [[SomethingTheyWouldNeverSay Too easy]]. ''(BoomHeadshot)''
* An episode of ''{{Series/Eureka}}'' has a number of characters being replaced by clones. Allison has figured out that Jack is a clone and is trying to get her kids to stay at her relatives. Unfortunately, Evil!Jack is already home. Allison is trying to explain that Jack is sick. SARAH comes on and says that her CT scan of Jack reveals perfect health. A few seconds later, a {{Stun Gun|s}} comes out of the ceiling and knocks him out. When asked, SARAH confirms that her CT scan was accurate and matched Jack's DNA perfectly... except his cells are one day old.

to:

* ThoseWackyNazis have created {{doppelganger}}s of the two female members of ''Series/{{Danger 5}}''.''Series/Danger5''. Tucker starts by asking Claire some personal questions, but both know the answer. Pierre says that while memories can be duplicated, emotions cannot. So Tucker starts playing the flute until the real Claire starts crying, leading him to BoomHeadshot the imposter. This technique won't work on Ilsa as "[[MotherRussiaMakesYouStrong Russians don't have emotions.]]"
-->'''Jackson:''' The cloned Ilsa will tell me whatever she thinks I want to hear to stay alive. But the real Ilsa... I don't know what she wants, and I don't think she'll ever really know. So... why shouldn't I kill you?
-->'''Fake
you?\\
'''Fake
Ilsa:''' So we can spend the rest of our lives together?
-->'''Jackson:'''
together?\\
'''Jackson:'''
[[SomethingTheyWouldNeverSay Too easy]]. ''(BoomHeadshot)''
''[BoomHeadshot]''
* An episode of ''{{Series/Eureka}}'' ''Series/{{Eureka}}'' has a number of characters being replaced by clones. Allison has figured out that Jack is a clone and is trying to get her kids to stay at her relatives. Unfortunately, Evil!Jack Evil Jack is already home. Allison is trying to explain that Jack is sick. SARAH comes on and says that her CT scan of Jack reveals perfect health. A few seconds later, a {{Stun Gun|s}} comes out of the ceiling and knocks him out. When asked, SARAH confirms that her CT scan was accurate and matched Jack's DNA perfectly... except his cells are one day old.



* This has become a pretty regular thing on ''Series/{{Supernatural}}'', due to how common shapeshifters, [[DemonicPossession demons]], and during season 7 [[EldritchAbomination Leviathans]] are. A cut with a silver blade and a swig of holy water (and in Season 7 and early parts of Season 8, a splash of borax) was and is a common test upon one of the boys coming BackFromTheDead again.
** Parodied in "Taxi Driver". During Sam and Bobby's escape from Hell, a demon takes on Sam's appearance, and Bobby struggles to figure out which is the demon and which is the real one, until he kills one of them and turns out to be right.
-->'''Sam:''' You knew somehow, right?
-->'''Bobby:''' Took a chance. ''[Sam scowls]'' Fifty-fifty. ''[Bobby shrugs]''

to:

* This has become a pretty regular thing on ''Series/{{Supernatural}}'', due to how common shapeshifters, [[DemonicPossession demons]], and during season 7 [[EldritchAbomination Leviathans]] are. A cut with a silver blade and a swig of holy water (and in Season 7 and early parts of Season 8, a splash of borax) was and is a common test upon one of the boys coming BackFromTheDead again.
**
again. Parodied in "Taxi Driver". During Driver": dring Sam and Bobby's escape from Hell, a demon takes on Sam's appearance, and Bobby struggles to figure out which is the demon and which is the real one, until he kills one of them and turns out to be right.
-->'''Sam:''' You knew somehow, right?
-->'''Bobby:'''
right?\\
'''Bobby:'''
Took a chance. ''[Sam scowls]'' Fifty-fifty. ''[Bobby shrugs]''



* ''Series/DoctorWho''

to:

* ''Series/DoctorWho''''Series/DoctorWho'':



[[folder:Machinima]]
* Parodied in ''Machinima/RedVsBlue Revelations'' when [[spoiler:a newly revived Tex]] is [[CurbStompBattle fighting the rest of the soldiers]]. At one point, Tucker's armor [[spoiler:gets turned black (like Tex's) and Tex starts pummeling him.]]
-->'''Simmons:''' They look the same! Which one do I shoot?!\\
'''Tucker:''' Ow! Shoot the one who's winning, dumbass!
[[/folder]]



[[folder:Newspaper Comics]]
* One week-long arc in ''ComicStrip/{{Dilbert}}'' had the PointyHairedBoss abducted by aliens and replaced by a double. Everyone in the office immediately realizes this because the double is competent and possesses people skills. Due to the differences being good ones, they don't even ''try'' to save the real boss (Who frees himself by accident when he teaches them Earth management techniques, causing the UFO to crash after the captain downsizes half the crew).
[[/folder]]

[[folder:Professional Wrestling]]

to:

[[folder:Newspaper Comics]]
* One week-long arc in ''ComicStrip/{{Dilbert}}'' had the PointyHairedBoss abducted by aliens and replaced by a double. Everyone in the office immediately realizes this because the double is competent and possesses people skills. Due to the differences being good ones, they don't even ''try'' to save the real boss (Who frees himself by accident when he teaches them Earth management techniques, causing the UFO to crash after the captain downsizes half the crew).
[[/folder]]

[[folder:Professional
[[folder:Pro Wrestling]]



[[folder:Theatre]]

to:

[[folder:Theatre]][[folder:Theater]]



* The final level of ''VideoGame/FearEffect 2: Retro Helix'' has [[TheHero Hana]] being forced to identify which is [[LoveInterests Rain]] and which is [[EvilTwin Mist]], with the choice determining the ending to the game. [[spoiler: It's the one holding the disk - Rain's left handed.]]

to:

* The final level of ''VideoGame/FearEffect 2: Retro Helix'' has [[TheHero Hana]] being forced to identify which is [[LoveInterests Rain]] and which is [[EvilTwin Mist]], with the choice determining the ending to the game. [[spoiler: It's the one holding the disk - -- Rain's left handed.]]



[[folder:Web Animation]]
* Parodied in ''Machinima/RedVsBlue Revelations'' when [[spoiler:a newly revived Tex]] is [[CurbStompBattle fighting the rest of the soldiers]]. At one point, Tucker's armor [[spoiler:gets turned black (like Tex's) and Tex starts pummeling him.]]
-->'''Simmons:''' They look the same! Which one do I shoot?!\\
'''Tucker:''' Ow! Shoot the one who's winning, dumbass!
* Played straight in ''Machinima/TheGmodIdiotBox''. Louis is trying to decide which Francis is real (one is a spy). He tells them to go up stairs. The one that gladly does gets shot. It then gets parodied the next moment, when Louis decides that they have to go up the stairs, [[spoiler:and the real Francis hates stairs, so he shoots Louis.]]
* [[https://www.youtube.com/watch?v=5lea-Dx6b5Y This Sonic Parody video]] has Tails initially confused which one is the real deal between the Real Sonic and Metal Sonic [[PaperThinDisguise despite the fact that Metal Sonic constantly gets facts wrong, can't even talk correctly, and doesn't remotely look like Sonic aside from being blue,]] which Sonic lampshades. Tails does manage to quickly shoot Metal Sonic, but [[EpicFail in a subversion the shot ricochets and ends up killing the real Sonic anyway.]]
[[/folder]]



* Played straight in ''Machinima/TheGmodIdiotBox''. Louis is trying to decide which Francis is real (one is a spy). He tells them to go up stairs. The one that gladly does gets shot. It then gets parodied the next moment, when Louis decides that they have to go up the stairs, [[spoiler:and the real Francis hates stairs, so he shoots Louis.]]



* [[https://www.youtube.com/watch?v=5lea-Dx6b5Y This Sonic Parody video]] has Tails initially confused which one is the real deal between the Real Sonic and Metal Sonic [[PaperThinDisguise despite the fact that Metal Sonic constantly gets facts wrong, can't even talk correctly, and doesn't remotely look like Sonic aside from being blue,]] which Sonic lampshades. Tails does manage to quickly shoot Metal Sonic, but [[EpicFail in a subversion the shot ricochets and ends up killing the real Sonic anyway.]]



* ''WesternAnimation/CodenameKidsNextDoor''
** "Op PRESIDENT": The 4th Grade President and a robot replica thereof fight on a bus on its way to the City Hall (the real pres wants to cut down on school hours). One of them gets thrown off. Nigel stops at a city dump to slag the fake with an electromagnet and car crusher, while Hoagie takes the thrown-off real president to the Hall himself...except that the actual president was then {{Brainwashed}} by recurring villain Father, and school hours end up being extended to 8:25pm. (Although it may not have been complete brainwashing, due to the President in Operation SNOWING being an out-and-out villain as well as giving a reason he turned evil.) In short, [[XanatosGambit it didn't matter who got to City Hall Father was guaranteed to win.]]

to:

* ''WesternAnimation/CodenameKidsNextDoor''
''WesternAnimation/CodenameKidsNextDoor'':
** "Op PRESIDENT": "Operation: P.R.E.S.I.D.E.N.T.": The 4th Grade President and a robot replica thereof fight on a bus on its way to the City Hall (the real pres wants to cut down on school hours). One of them gets thrown off. Nigel stops at a city dump to slag the fake with an electromagnet and car crusher, while Hoagie takes the thrown-off real president to the Hall himself... except that the actual president was then {{Brainwashed}} turned to his side by recurring villain Father, and school hours end up being extended to 8:25pm. (Although it may not have been complete brainwashing, due to the President in Operation SNOWING being an out-and-out villain as well as giving a reason he turned evil.) In short, [[XanatosGambit it didn't matter who got to City Hall Father was guaranteed to win.]]



* ''WesternAnimation/XMen''

to:

* ''WesternAnimation/XMen'' ''WesternAnimation/XMen'':



* ''WesternAnimation/TheSimpsons''

to:

* ''WesternAnimation/TheSimpsons'' ''WesternAnimation/TheSimpsons'':



* ''WesternAnimation/FamilyGuy'',

to:

* ''WesternAnimation/FamilyGuy'', ''WesternAnimation/FamilyGuy'':



* ''WesternAnimation/TheTransformers''

to:

* ''WesternAnimation/TheTransformers''''WesternAnimation/TheTransformers'':



* Subverted in the ''WesternAnimation/SpongebobSquarepants'' episode "Imitation Krabs", where [=SpongeBob=] can't distinguish between Mr. Krabs and Plankton's robotic replica of Krabs -- despite the fact that one is [[PaperThinDisguise clearly a robot]], complete with {{Robospeak}}, though [=SpongeBob=] did get weirded out by the Robot's "Metal Pants." [=SpongeBob=] gives the two Krabs a series of questions he thinks only the real Mr. Krabs would know. The first two are generic questions that anyone who's been to the Krusty Krab can answer and Robot Krabs answers them both. The third question is one that is so complicated that even the real Krabs can't answer.

to:

* Subverted in the ''WesternAnimation/SpongebobSquarepants'' ''WesternAnimation/SpongeBobSquarePants'' episode "Imitation Krabs", where [=SpongeBob=] can't distinguish between Mr. Krabs and Plankton's robotic replica of Krabs -- despite the fact that one is [[PaperThinDisguise clearly a robot]], complete with {{Robospeak}}, though [=SpongeBob=] did get weirded out by the Robot's "Metal Pants." [=SpongeBob=] gives the two Krabs a series of questions he thinks only the real Mr. Krabs would know. The first two are generic questions that anyone who's been to the Krusty Krab can answer and Robot Krabs answers them both. The third question is one that is so complicated that even the real Krabs can't answer.



* In one episode of ''[[WesternAnimation/DungeonsAndDragons Dungeons & Dragons]]'', Hank correctly works out that the DungeonMaster is an imposter when he ''[[CrypticConversation gives the group a straight answer]]''. Unfortunately he doesn't realize that the Dungeon Master who shows up after that is ''also'' an imposter.

to:

* In one episode of ''[[WesternAnimation/DungeonsAndDragons Dungeons & Dragons]]'', ''WesternAnimation/DungeonsAndDragons'', Hank correctly works out that the DungeonMaster is an imposter when he ''[[CrypticConversation gives the group a straight answer]]''. Unfortunately he doesn't realize that the Dungeon Master who shows up after that is ''also'' an imposter.



** The first occurrence was with XANA himself impersonating Jérémie in "Ghost Channel". (Basically, it was a case of EvilCannotComprehendGood; XANA insisted that Jérémie was too afraid to ever come to Lyoko, but the other knew that he ''would'' if their lives were in danger. XANA's ignorance of how Jérémie would react led the others to realize it was him.)
** In "XANA's Kiss", when confronted with two Jérémies, Aelita can guess which one is genuine because the Clone had kissed her without permission, which the true Jérémie would not have dared to do. (Maybe XANA ''can'' comprehend good, just not very well...) Later in the same episode, Odd recognizes the real Yumi from the Clone impersonating her when the Clone doesn't insult him while the real Yumi called him a pea-brain. (He knew it was her. Odd may be insulted a lot, but he knows that XANA would never call him a "pea-brain".)

to:

** The first occurrence was is with XANA himself impersonating Jérémie in "Ghost Channel". (Basically, it was is a case of EvilCannotComprehendGood; XANA insisted insists that Jérémie was is too afraid to ever come to Lyoko, but the other knew others know that he ''would'' ''will'' if their lives were are in danger. XANA's ignorance of how Jérémie would react led the others to realize it was is him.)
** In "XANA's Kiss", when confronted with two Jérémies, Aelita can guess which one is genuine because the Clone had kissed her without permission, which the true Jérémie would not have dared to do. (Maybe XANA ''can'' comprehend good, just not very well...) Later in the same episode, Odd recognizes the real Yumi from the Clone impersonating her when the Clone doesn't insult him while the real Yumi called calls him a pea-brain. (He knew knows it was her. Odd may be insulted a lot, but he knows that XANA would never call him a "pea-brain".)



** Both time that X.A.N.A. pretended to be Franz Hopper, he got caught by two different people. In "Franz Hopper", it's Jeremie realizing about line about Franz's ruined dairy. (The real Franz [[SayingTooMuch would not have known that.]]) "Distant Memory", it's Aelita who realizes what's going on when X.A.N.A. calls " Skidbladnir" a funny name and no virtual take for Aelita's mom.
** Subverted in "Image Problem". The team was suspicious of Yumi's imposter, but no-one truly caught on until she actually became hostile. (Of course, it ''was'' the first time XANA had tried something like this.)
* In ''WesternAnimation/DarkwingDuck'', they used the split personality variant for the episode "Negaduck". When Gosalyn and Launchpad decide to set free the good Darkwing to help them retrieve the AppliedPhlebotinum that caused the split, in order to undo it, they mistakenly release the evil Darkwing, and he pretends to be the good one briefly, until he can effect his getaway. In subsequent episodes, the unsplit genuine Darkwing has an actual EvilTwin who goes by Negaduck, and on multiple occasions one of them has disguised himself as the other, resulting in Spot the Imposter scenes for the allies of whichever one they're disguised as.
** One memorable moment has Darkwing and Negaduck dressed identically (except Negaduck wore a black mask) and acting so much like each other that they mirror each other's words and body motions perfectly. Then Darkwing breaks the impasse by declaring that a cute defenseless bunny rabbit is nearby, whereupon Negaduck (who was ''hatched'' from a VillainBall) compulsively tries to kill the bunny with a shotgun. Before that, however, we get this memorable solution:
-->'''Dr. Bellum:''' ''(completely nonchalant)'' Well, we'll just have to kill them both. ''(arms bazooka)''

to:

** Both time that X.A.N.A. pretended pretends to be Franz Hopper, he got gets caught by two different people. In "Franz Hopper", it's Jeremie Jérémie realizing about line about lines on Franz's ruined dairy. (The real Franz [[SayingTooMuch would not have known that.]]) In "Distant Memory", it's Aelita who realizes what's going on when X.A.N.A. calls " Skidbladnir" "Skidbladnir" a funny name and no virtual take for Aelita's mom.
** Subverted in "Image Problem". The team was is suspicious of Yumi's imposter, but no-one truly caught catch on until she actually became becomes hostile. (Of course, it ''was'' ''is'' the first time XANA had has tried something like this.)
* In ''WesternAnimation/DarkwingDuck'', they used ''WesternAnimation/DarkwingDuck'':
** They use
the split personality variant for the episode "Negaduck". When Gosalyn and Launchpad decide to set free the good Darkwing to help them retrieve the AppliedPhlebotinum that caused the split, in order to undo it, they mistakenly release the evil Darkwing, and he pretends to be the good one briefly, until he can effect his getaway. getaway.
**
In subsequent episodes, the unsplit genuine Darkwing has an actual EvilTwin who goes by Negaduck, and on multiple occasions one of them has disguised himself as the other, resulting in Spot the Imposter scenes for the allies of whichever one they're disguised as.
**
as. One memorable moment has Darkwing and Negaduck dressed identically (except Negaduck wore wears a black mask) and acting so much like each other that they mirror each other's words and body motions perfectly. Then Darkwing breaks the impasse by declaring that a cute defenseless bunny rabbit is nearby, whereupon Negaduck (who was ''hatched'' from a VillainBall) compulsively tries to kill the bunny with a shotgun. Before that, however, we get this memorable solution:
-->'''Dr. --->'''Dr. Bellum:''' ''(completely nonchalant)'' ''[completely nonchalant]'' Well, we'll just have to kill them both. ''(arms bazooka)''''[arms bazooka]''



-->'''Darkwing Duck''': Hey! What's the deal? IS THIS ANY WAY TO TREAT YOUR LEADER!?!? (So much for the 'perfect disguise!)

to:

-->'''Darkwing Duck''': --->'''Darkwing Duck:''' Hey! What's the deal? IS THIS ANY WAY TO TREAT YOUR LEADER!?!? (So much for the 'perfect disguise!)



-->'''Bushroot''': Kill Negaduck! Kill Negaduck!\\
'''Negaduck''': ''(still reeling from Darkwing's anvil attack)'' Kill who?!\\
'''Darkwing''': No, wait, I'm DARKWING Duck; HE'S Negaduck! KILL HIM!!\\
'''Negaduck''': You thought he was me? You were going to kill... ME?!?!?\\
'''Bushroot''': No, no, no! We knew it was Darkwing! We were just testing, see?\\
'''Quackerjack''': Wait, didn't we already kill Darkwing Duck?\\
'''Bushroot''': Gah! THE GHOST OF DARKWING DUCK!!\\
'''Liquidator''': He's baaack!\\
'''Negaduck''': ''(beyond pissed)'' JUST... GET HIM NOW!!!!!!!

to:

-->'''Bushroot''': --->'''Bushroot:''' Kill Negaduck! Kill Negaduck!\\
'''Negaduck''': ''(still '''Negaduck:''' ''[still reeling from Darkwing's anvil attack)'' attack]'' Kill who?!\\
'''Darkwing''': '''Darkwing:''' No, wait, I'm DARKWING Duck; HE'S Negaduck! KILL HIM!!\\
'''Negaduck''': '''Negaduck:''' You thought he was me? You were going to kill... ME?!?!?\\
'''Bushroot''': '''Bushroot:''' No, no, no! We knew it was Darkwing! We were just testing, see?\\
'''Quackerjack''': '''Quackerjack:''' Wait, didn't we already kill Darkwing Duck?\\
'''Bushroot''': '''Bushroot:''' Gah! THE GHOST OF DARKWING DUCK!!\\
'''Liquidator''': '''Liquidator:''' He's baaack!\\
'''Negaduck''': ''(beyond pissed)'' '''Negaduck:''' ''[beyond pissed]'' JUST... GET HIM NOW!!!!!!!



* Subverted in ''WesternAnimation/StrokerAndHoop'' when Hoop and his evil-identical-cousin are holding a gun on each other, with Stroker nearby. Stroker shoots one of the Hoops in the knee, causing the other one to exclaim "Good job, Stroker" before Stroker kneecaps him too. "Now we can figure out who's who at our leisure!"
** This being Stroker and Hoop, they still get it wrong (at least until they spot the evil one pursing his hands with an evil grin as they prepare to drive off)
--->'''C.A.R.:''' We'd better double back and make sure.

to:

* Subverted in ''WesternAnimation/StrokerAndHoop'' when Hoop and his evil-identical-cousin are holding a gun on each other, with Stroker nearby. Stroker shoots one of the Hoops in the knee, causing the other one to exclaim "Good job, Stroker" before Stroker kneecaps him too. "Now we can figure out who's who at our leisure!"
**
leisure!" This being Stroker and Hoop, they still get it wrong (at least until they spot the evil one pursing his hands with an evil grin as they prepare to drive off)
--->'''C.-->'''C.A.R.:''' We'd better double back and make sure.



* ''WesternAnimation/KimPossible'': When confronted with a shape-shifted Camille Leon, Kim can quickly identify the real Ron, but when it is Ron's turn in another episode, he picks the wrong one, to Kim's annoyance.
** Not really. Kim had to rely on Camille being unable to duplicate Ron's ever-present pet, despite the fact that Camille stood in a pose that was obviously nothing like Ron's and utterly lacked Ron's {{Cloudcuckoolander}} personality. In the episode where Ron had to pick, Camille apparently worked on those flaws in her disguises, and Ron, having been trapped in a crate the entire episode, had stumbled onto the scene only moments earlier, and had absolutely no idea what was even going on. Even Monique, who had been touted as the one who got it right, wasn't actually able to distinguish between the two; she simply identified the disguised Camille's outfit as an expensive one more likely to be worn by spoiled heiress Camille than by the more practical Kim. [[note]]Plus Monique had helped Kim ''pick out'' that outfit to disguise herself a few minutes earlier![[/note]]
* ''WesternAnimation/JackieChanAdventures'': In an episode involving a group of {{Evil Knockoff}}s cloned off the FiveManBand, Jackie's clone is found but the rest of the group needs to know which Jackie is the real one. Jade asks both Jackies if they can take her to an amusement park, the first says yes while the second says no and tells her to do her homework. [[OutOfCharacterAlert Jade knows better]] and the first Jackie is exposed as the clone. In the same episode, Paco keeps calling Jade by pronouncing her name correctly, while in all the other episodes he pronounces it "Yade." She catches on to this as well and it is exposed that he too is a clone.
** Before Jade asked about the amusement park, Capt. Black made an attempt by asking about his birthday. Neither Jackie knew the day.
-->'''Captain Black''': Now that's just hurtful.

to:

* ''WesternAnimation/KimPossible'': When confronted with a shape-shifted Camille Leon, Kim can quickly identify the real Ron, but when it is Ron's turn in another episode, he picks the wrong one, to Kim's annoyance.
** Not really.
annoyance. Kim had to rely on Camille being unable to duplicate Ron's ever-present pet, despite the fact that Camille stood in a pose that was obviously nothing like Ron's and utterly lacked Ron's {{Cloudcuckoolander}} personality. In the episode where Ron had to pick, Camille apparently worked on those flaws in her disguises, and Ron, having been trapped in a crate the entire episode, had stumbled onto the scene only moments earlier, and had absolutely no idea what was even going on. Even Monique, who had been touted as the one who got it right, wasn't actually able to distinguish between the two; she simply identified the disguised Camille's outfit as an expensive one more likely to be worn by spoiled heiress Camille than by the more practical Kim. [[note]]Plus Monique had helped Kim ''pick out'' that outfit to disguise herself a few minutes earlier![[/note]]
* ''WesternAnimation/JackieChanAdventures'': In an episode involving a group of {{Evil Knockoff}}s cloned off the FiveManBand, Jackie's clone is found but the rest of the group needs to know which Jackie is the real one. Jade asks both Jackies if they can take her to an amusement park, the first says yes while the second says no and tells her to do her homework. [[OutOfCharacterAlert Jade knows better]] and the first Jackie is exposed as the clone. In the same episode, Paco keeps calling Jade by pronouncing her name correctly, while in all the other episodes he pronounces it "Yade." She catches on to this as well and it is exposed that he too is a clone.
**
clone. Before Jade asked about the amusement park, Capt. Black made an attempt by asking about his birthday. Neither Jackie knew the day.
-->'''Captain Black''': Black:''' Now that's just hurtful.



* ''WesternAnimation/{{Futurama}}''

to:

* ''WesternAnimation/{{Futurama}}''''WesternAnimation/{{Futurama}}'':



--->'''Leela:''' Shoot her! She's the robot!
--->'''Robot Leela:''' No! Shoot her! She's the human!
--->'''Fry:''' B-But how will I know who's the human and who's the robot?
--->'''Leela:''' We just told you!
--->'''Robot Leela:''' Yeah, you idiot!
* ''WesternAnimation/RobotChicken''

to:

--->'''Leela:''' Shoot her! She's the robot!
--->'''Robot
robot!\\
'''Robot
Leela:''' No! Shoot her! She's the human!
--->'''Fry:'''
human!\\
'''Fry:'''
B-But how will I know who's the human and who's the robot?
--->'''Leela:'''
robot?\\
'''Leela:'''
We just told you!
--->'''Robot
you!\\
'''Robot
Leela:''' Yeah, you idiot!
* ''WesternAnimation/RobotChicken'' ''WesternAnimation/RobotChicken'':



** This happened in almost every episode that [[MasterOfDisguise The Chameleon]] was in. When he tried it during a fight with Daredevil, Spidey had the requisite "I don't know which one to hit" moment - only for the genuine article to simply outfight Chameleon.
** Then there was the time that [[EvilTwin Spider-Carnage]] kidnapped and replaced our Peter (who was himself pretending to be this reality's--long story--Peter). Gwen Stacy sees through them both, recognises that our Peter is still the heroic one, and frees him.
---> '''Peter''': How did you know that the other Spider-Man wasn't me?\\
'''Gwen Stacy''': The one downstairs? He's as [[AxCrazy nutty as a fruitcake]]. A girlfriend notices these things.
* Played with in the ''WesternAnimation/TheSpectacularSpiderMan'' episode "Persona." The Chameleon dresses up as Spidey, framing him for various crimes. However, when Captain George Stacy sees the imposter in person, he notes that he's too tall to be the real thing. When the real webslinger shows up, he easily proves he's the real deal (despite his [[ComicBook/{{Venom}} new costume]]) by overpowering Chameleon with his spider strength and agility.
* ''WesternAnimation/TransformersPrime''

to:

** This happened happens in almost every episode that [[MasterOfDisguise The Chameleon]] was is in. When he tried tries it during a fight with Daredevil, Spidey had the requisite "I don't know which one to hit" moment - -- only for the genuine article to simply outfight Chameleon.
** Then there was is the time that [[EvilTwin Spider-Carnage]] kidnapped kidnaps and replaced our Peter (who was is himself pretending to be this reality's--long story--Peter). reality's -- long story -- Peter). Gwen Stacy sees through them both, recognises recognizes that our Peter is still the heroic one, and frees him.
---> '''Peter''': --->'''Peter:''' How did you know that the other Spider-Man wasn't me?\\
'''Gwen Stacy''': Stacy:''' The one downstairs? He's as [[AxCrazy nutty as a fruitcake]]. A girlfriend notices these things.
* Played with in the ''WesternAnimation/TheSpectacularSpiderMan'' episode "Persona." "Persona". The Chameleon dresses up as Spidey, framing him for various crimes. However, when Captain George Stacy sees the imposter in person, he notes that he's too tall to be the real thing. When the real webslinger shows up, he easily proves he's the real deal (despite his [[ComicBook/{{Venom}} new costume]]) by overpowering Chameleon with his spider strength and agility.
* ''WesternAnimation/TransformersPrime''''WesternAnimation/TransformersPrime'':



* ''WesternAnimation/MyLittlePonyFriendshipIsMagic''
** Averted in the season 2 finale when Twilight Sparkle and the real Cadance crash the wedding that has [[spoiler:Queen Chrysalis]] posing as Cadance. The villain gives up the pretense concluding that since Twilight Sparkle's previous voiced suspicions about the bride now have the real Cadance's support, everyone else will instantly put one and one together and realize who is impostor is.
** Played straight in the episode "Too Many Pinkie Pies". Pinkie used a mirror pond clone herself, but too many clones were made and Twilight needed to know which Pinkie was real or she might get rid of her by accident. So Twilight [[spoiler: forced all the Pinkies to watch paint dry and sent anyone who got distracted or stopped looking back to the mirror pond that they came from, because the real Pinkie would do anything for her friends]].
* ''WesternAnimation/TheLifeAndTimesOfJuniperLee'': Ray Ray had to identify the real Juniper. One failed attempt consisted on asking both Junes to tell her middle name. Both knew it was "Kim". Ray Ray eventually managed to tell who the real was the same way Jade did with Jackie in an above example. To her dismay, he was helped by a zit she tried to rid herself of earlier.
* ''WesternAnimation/JusticeLeague''

to:

* ''WesternAnimation/MyLittlePonyFriendshipIsMagic''
''WesternAnimation/MyLittlePonyFriendshipIsMagic'':
** Averted in the season 2 finale when Twilight Sparkle and the real Cadance crash the wedding that has [[spoiler:Queen Chrysalis]] posing as Cadance. The villain gives up the pretense pretense, concluding that since Twilight Sparkle's previous voiced suspicions about the bride now have the real Cadance's support, everyone else will instantly put one and one together and realize who is impostor imposter is.
** Played straight in the episode "Too Many Pinkie Pies". Pinkie used a mirror pond clone herself, but too many clones were are made and Twilight needed needs to know which Pinkie was is real or she might get rid of her by accident. So Twilight [[spoiler: forced [[spoiler:forces all the Pinkies to watch paint dry and sent sends anyone who got gets distracted or stopped stops looking back to the mirror pond that they came from, because the real Pinkie would do anything for her friends]].
* ''WesternAnimation/TheLifeAndTimesOfJuniperLee'': Ray Ray had has to identify the real Juniper. One failed attempt consisted consists on asking both Junes to tell her middle name. Both knew it was is "Kim". Ray Ray eventually managed manages to tell who the real was is the same way Jade did with Jackie in an above example. To her dismay, he was is helped by a zit she tried to rid herself of earlier.
* ''WesternAnimation/JusticeLeague'' ''WesternAnimation/JusticeLeague'':



* When Olive Oyl invited ComicStrip/{{Popeye}} to eat hamburgers at her place, Wimpy disguised himself as Popeye and managed to fool Olive. Popeye then ate his spinach and defeated Wimpy. It's unclear if Popeye ever told Olive it was Wimpy or that he actually fooled her.

to:

* When Olive Oyl invited ComicStrip/{{Popeye}} invites WesternAnimation/{{Popeye}} to eat hamburgers at her place, Wimpy disguised disguises himself as Popeye and managed manages to fool Olive. Popeye then ate eats his spinach and defeated Wimpy. It's unclear if Popeye ever told tells Olive it was Wimpy or that he actually fooled her.



* ''WesternAnimation/ThePowerpuffGirls''

to:

* ''WesternAnimation/ThePowerpuffGirls''''WesternAnimation/ThePowerpuffGirls'':



--->'''Ms. Bellum''': Uh, sir, this might just be me, but donít you think the girls were acting a little strange?\\
'''Mayor''': How so?\\
'''Ms. Bellum''': Wellórobbing the bank, the jewelry store, your house? Beating the living daylights out of you? Need I go on?\\
'''Mayor''': Yes, Iím not following.\\
'''Ms. Bellum''': The deep voices, the facial hair, the height! Not to mention the manly odor!\\
'''Mayor''': And? And?\\
'''Ms. Bellum''': Those were men dressed up as the Powerpuff Girls! Understand?\\
'''Mayor''': Yes! Thereís only one thing to do! (walks to the phone) Hello, Chief of Police? Arrest the Powerpuff Girls!
*** Even worse, later when the girls and imposters confront each other even THEY can't tell the difference between the reals and fakes, resulting in them each hitting their own side.

to:

--->'''Ms. Bellum''': Bellum:''' Uh, sir, this might just be me, but donít don't you think the girls were acting a little strange?\\
'''Mayor''': '''Mayor:''' How so?\\
'''Ms. Bellum''': Wellórobbing Bellum:''' Well -- robbing the bank, the jewelry store, your house? Beating the living daylights out of you? Need I go on?\\
'''Mayor''': '''Mayor:''' Yes, Iím I'm not following.\\
'''Ms. Bellum''': Bellum:''' The deep voices, the facial hair, the height! Not to mention the manly odor!\\
'''Mayor''': '''Mayor:''' And? And?\\
'''Ms. Bellum''': Bellum:''' Those were men dressed up as the Powerpuff Girls! Understand?\\
'''Mayor''': '''Mayor:''' Yes! Thereís There's only one thing to do! (walks ''[walks to the phone) phone]'' Hello, Chief of Police? Arrest the Powerpuff Girls!
*** ::: Even worse, later when the girls and imposters confront each other even THEY can't tell the difference between the reals and fakes, resulting in them each hitting their own side.



* In an episode of ''WesternAnimation/TeamoSupremo'', there's a villain named Madame Snake who's a master of disguise. Near the end of the episode, Madame Snake has disguised herself as Mrs. Woolingantz, our heroes' teacher, so the team has to figure out which one is the real teacher and which one is Madame Snake. Interestingly, while Mrs. Woolingantz is nice, Madame Snake is eventually caught when she tries to act ''too'' nice: Madame Snake promises not to give the team any more homework for the rest of the year. The team finds this tempting, but it proves she's the fake: the real Mrs. Woolingantz may not give a lot of homework, but she gets "really upset if you don't do it", so the real deal would never have made that kind of offer.

to:

* ''WesternAnimation/TeamoSupremo'':
**
In an episode of ''WesternAnimation/TeamoSupremo'', episode, there's a villain named Madame Snake who's a master of disguise. Near the end of the episode, Madame Snake has disguised herself as Mrs. Woolingantz, our heroes' teacher, so the team has to figure out which one is the real teacher and which one is Madame Snake. Interestingly, while Mrs. Woolingantz is nice, Madame Snake is eventually caught when she tries to act ''too'' nice: Madame Snake promises not to give the team any more homework for the rest of the year. The team finds this tempting, but it proves she's the fake: the real Mrs. Woolingantz may not give a lot of homework, but she gets "really upset if you don't do it", so the real deal would never have made that kind of offer.



* Parodied in the ''WesternAnimation/DextersLaboratory'' story "Beard to be Feared", when the villains briefly mistake Dexter for Action Hank thanks to his newly-acquired beard, and are confused when the real Hank shows up:
-->'''Villain 1''': ''Two'' Action Hanks?!\\
'''Villain 2''': But which one's the real one?\\
'''Villain 1''': Who cares?! Get them!

to:

* Parodied in the ''WesternAnimation/DextersLaboratory'' story "Beard to be Feared", when the villains briefly mistake Dexter for Action Hank thanks to his newly-acquired newly acquired beard, and are confused when the real Hank shows up:
-->'''Villain 1''': 1:''' ''Two'' Action Hanks?!\\
'''Villain 2''': 2:''' But which one's the real one?\\
'''Villain 1''': 1:''' Who cares?! Get them!



** In "She-Demon of Phantos", Skeletor tricks Queen Elmora by casting illusions so He-Man looks exactly like him, making her unable to tell them apart. He-Man solves it by asking Elmora to use her magic to tie both of them up with Photanium chains. He-Man could break through them, while Skeletor couldn't.
** In "Double Trouble", the Mirror of Moravad creates doubles of people with opposite moralities. It eventually creates a heroic Skeletor who helps the heroes. When the double and real Skeletor fight, the heroes can't tell them apart, until He-Man asks both of them to say, "He-Man is my friend." The double said it without hesitation, while the real Skeletor angrily refused.

to:

** In "She-Demon of Phantos", Skeletor tricks Queen Elmora by casting illusions so He-Man looks exactly like him, making her unable to tell them apart. He-Man solves it by asking Elmora to use her magic to tie both of them up with Photanium chains. He-Man could can break through them, while Skeletor couldn't.
can't.
** In "Double Trouble", the Mirror of Moravad creates doubles of people with opposite moralities. It eventually creates a heroic Skeletor who helps the heroes. When the double and real Skeletor fight, the heroes can't tell them apart, until He-Man asks both of them to say, "He-Man is my friend." The double said says it without hesitation, while the real Skeletor angrily refused.refuses.



* Boston landmark Faneuil Hall has an unusually-shaped weathervane (a grasshopper), which was sometimes used as a Spot the Impostor test during the American Revolutionary War.
* Alan Turing [[http://en.wikipedia.org/wiki/Turing_test proposed]] that a computer program which could win a text-only game of Spot the Imposter should be considered intelligent. The "Turing Test", as it's called, is a popular challenge for AI programmers to try to overcome, though it isn't seriously considered a benchmark for true intelligence in a computer.
** [[http://www.loebner.net/Prizef/TuringArticle.html The original paper is available online]], for the curious.
* During the Battle of the Bulge, German troops in US Army uniform infiltrated the lines with the intent of causing sabotage and disruption. Checkpoints grilled GI's on things every true-blooded American was expected to know such as the identity of Mickey Mouse's girlfriend, baseball scores, or the capital of Illinois. This last question resulted in the brief detention of General Bradley; although he gave the correct answer (Springfield) the GI who questioned him apparently believed the capital was Chicago. Although this behavior is often ridiculed in fictional depictions of the battle, it did succeed in identifying a number of infiltrators, many of whom didn't speak fluent English or know anything about American society.
** There's also a legend about a German spy who was caught because he could recite the entire "Star-Spangled Banner" when no ''true'' American knows anything past the first verse.
* Similar to the above, the parts of the [[LaResistance French Resistance]] that helped Allied pilots back to England often quizzed the airmen they were helping. They often came across pilots who had knowledge of their unit, but none of their supposed home town, who were immediately detained as a possible mole. Once, they had a pilot who was the opposite -- knew everything about his homeland, but nothing about his unit. Fortunately for him, one of the Resistance members was able to contact the RAF and established that he had been transferred there as a replacement from another unit, then immediately put on a bomber that was shot down over Europe.
** One Allied pilot who was shot down and hidden in a barn by some locals found himself woken in the middle of the night by someone jabbing him in the gut and screaming at him in German. He reflexively protested in his native English, which served to prove to the French partisans that he was not a German spy. He reflected later on that it was fortunate that he did not reflexively reply in ''German'', which he had studied in school.

to:

* Boston landmark Faneuil Hall has an unusually-shaped unusually shaped weathervane (a grasshopper), which was sometimes used as a Spot the Impostor test during the American Revolutionary War.
* Alan Turing [[http://en.wikipedia.org/wiki/Turing_test proposed]] that a computer program which could win a text-only game of Spot the Imposter should be considered intelligent. The "Turing Test", as it's called, is a popular challenge for AI A.I. programmers to try to overcome, though it isn't seriously considered a benchmark for true intelligence in a computer.
**
computer. [[http://www.loebner.net/Prizef/TuringArticle.html The original paper is available online]], for the curious.
* During the Battle of the Bulge, German troops in US Army uniform infiltrated the lines with the intent of causing sabotage and disruption. Checkpoints grilled GI's [=GIs=] on things every true-blooded American was expected to know such as the identity of Mickey Mouse's girlfriend, baseball scores, or the capital of Illinois. This last question resulted in the brief detention of General Bradley; although he gave the correct answer (Springfield) the GI who questioned him apparently believed the capital was Chicago. Although this behavior is often ridiculed in fictional depictions of the battle, it did succeed in identifying a number of infiltrators, many of whom didn't speak fluent English or know anything about American society.
**
society. There's also a legend about a German spy who was caught because he could recite the entire "Star-Spangled Banner" when no ''true'' American knows anything past the first verse.
* Similar to the above, the parts of the [[LaResistance French Resistance]] that helped Allied pilots back to England often quizzed the airmen they were helping. They often came across pilots who had knowledge of their unit, but none of their supposed home town, who were immediately detained as a possible mole. Once, they had a pilot who was the opposite -- knew everything about his homeland, but nothing about his unit. Fortunately for him, one of the Resistance members was able to contact the RAF and established that he had been transferred there as a replacement from another unit, then immediately put on a bomber that was shot down over Europe.
**
Europe.\\\
One Allied pilot who was shot down and hidden in a barn by some locals found himself woken in the middle of the night by someone jabbing him in the gut and screaming at him in German. He reflexively protested in his native English, which served to prove to the French partisans that he was not a German spy. He reflected later on that it was fortunate that he did not reflexively reply in ''German'', which he had studied in school.
5th Jul '17 10:55:03 AM MikeW
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Added DiffLines:

-->'''Jaime Imposter''': Oh, honey, I can copy your voice but not your moves.
26th Jun '17 6:08:52 AM foxley
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Added DiffLines:

* ''Series/TheAquabatsSuperShow'': In "The Thingy!", MC Bat Commander and Eaglebones are confronted with two versions of Ricky Fitness, and have to work out which one is the shape-shifting alien Thingy. Naturally, the Commander picks the wrong one and declares him to be the real Ricky.
19th Jun '17 3:40:22 PM zarpaulus
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Added DiffLines:

* In one issue of ''ComicBook/UsagiYojimbo'' Gen gets lost in a forest haunted by nine-tailed foxes and runs into Usagi, and suspects he's a fox when another Usagi shows up. After fighting them both for a bit he realizes they're both nine-tailed foxes and runs for it.
17th Jun '17 4:14:55 AM FlyingDuckManGenesis
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* In the ''WebVideo/SuperMarioLogan'' episode, "Jeffy Sneaks Out!", Mario [[YouAreGrounded grounds Jeffy from going to the movies with Bowser Junior]] for repeatedly saying the F word, so Jeffy creates a clone of him from his Play-Doh (ItMakesSenseInContext) to take his place while he sneaks out. Play-Doh Jeffy causes havoc at Mario's house, and towards the end of the episode, the real Jeffy gets into a fight with Play-Doh Jeffy, and Mario gets a hold of officer Brooklyn T. Guy's gun, with intent to shoot the Jeffy impostor. Despite the two Jeffys looking nothing alike, Mario and Rosalina are unable to tell them apart. At first, Mario sings "The Bunny Do", but both Jeffys dance along to it. He then grounds both Jeffys, and the real Jeffy goes into a swearing fit, prompting Mario to shoot Play-Doh Jeffy.



** In "Doppelganger", at the vet's office, stray dog Baxter switches places with Duke and even spray-paints himself to look like him. The animals take him home instead of Duke. When the real Duke returns, none of the animals are able to tell them apart (even though they look ''nothing'' like each other, not to mention [[AccidentalMisnaming Baxter always gets everyone's names wrong]]), except for Otis, who knows that Pig's pet skunk, Skunky, absolutely loathes the real Duke.

to:

** In "Doppelganger", at the vet's office, stray dog Baxter switches places with Duke and even spray-paints himself to look like him. The animals take him home instead of Duke. When the real Duke returns, none of the animals are able to tell them apart (even though they look ''nothing'' like each other, not to mention [[AccidentalMisnaming Baxter always gets everyone's names wrong]]), except for Otis, who knows that [[SmellySkunk Pig's pet skunk, Skunky, Skunky]], absolutely loathes the real Duke.
14th May '17 9:41:52 PM Freezer
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* ''ComicBook/SecretInvasion'': [[ComicBook/TheAvengers Avenger]] Crusader (who is actually a Skrull who decided to [[GoneNative live as a human super hero]]) is in the Avengers' commissary, with a plate of kiwi fruit, strawberries and pickles. Together, the combo approximated the taste of a favored Skrull fruit. He realizes the Avengers have been infiltrated by (other) Skrulls when he sees [[spoiler: Hank Pym]] serve himself the same combo.

to:

* ''ComicBook/SecretInvasion'': [[ComicBook/TheAvengers Avenger]] Crusader (who is actually a Skrull who decided to [[GoneNative [[GoingNative live as a human super hero]]) is in the Avengers' commissary, with a plate of kiwi fruit, strawberries and pickles. Together, the combo approximated the taste of a favored Skrull fruit. He realizes the Avengers have been infiltrated by (other) Skrulls when he sees [[spoiler: Hank Pym]] serve himself the same combo.
14th May '17 9:39:10 PM Freezer
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* ''Comicbook/LaffALympics'': During a relay race in "The Meet at Mount Ono", the Great Fondoo creates duplicates of Huckleberry Hound so Quick Draw [=McGraw=] won't know who to pass his team's rod to. Quick Draw eventually figures out who the real Huck is by having them sing "Oh My Darling, Clementine". The real one is more off-key than the imposters.

to:

* ''Comicbook/LaffALympics'': ''ComicBook/LaffALympics'': During a relay race in "The Meet at Mount Ono", the Great Fondoo creates duplicates of Huckleberry Hound so Quick Draw [=McGraw=] won't know who to pass his team's rod to. Quick Draw eventually figures out who the real Huck is by having them sing "Oh My Darling, Clementine". The real one is more off-key than the imposters.imposters.
* ''ComicBook/SecretInvasion'': [[ComicBook/TheAvengers Avenger]] Crusader (who is actually a Skrull who decided to [[GoneNative live as a human super hero]]) is in the Avengers' commissary, with a plate of kiwi fruit, strawberries and pickles. Together, the combo approximated the taste of a favored Skrull fruit. He realizes the Avengers have been infiltrated by (other) Skrulls when he sees [[spoiler: Hank Pym]] serve himself the same combo.
11th May '17 1:06:51 PM ludditetolpuddle
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Added DiffLines:

* When she is in someone else's form, Mystique's eyes usually flare yellow when she is tired, excited, angry, or about to shapeshift again.
* Mystique used the "Shoot us both!" move when she and the SWAT team commander she was imitating were surrounded by SWAT officers; the cops obeyed, one fell, the other didn't; when a cop asked "Why are you still standing, sir?", "he" replied, ("His" eyes flaring yellow) !I just moved my vital organs into my lower body.....".
1st May '17 5:16:35 PM Shadoboy
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* Spoofed in the last dungeon in ''VideoGame/PaperMario'', where a series of duplighosts ([[MeaningfulName ghosts that can duplicate your partner's (and sometimes your) appearance and abilities]]) which "duplicate" your partner. The first two encounters are played more-or-less straight, but in the third, the three duplighosts trying to duplicate Kooper the Koopa end up looking and talking like several different characters, including ''Luigi'', while [[BlatantLies still claiming to be Kooper]].

to:

* Spoofed in the last dungeon in ''VideoGame/PaperMario'', where a series of duplighosts ([[MeaningfulName ghosts that can duplicate your partner's (and sometimes your) appearance and abilities]]) which "duplicate" your partner. The first two encounters are played more-or-less straight, but in the third, the three duplighosts trying to duplicate Kooper the Koopa end up looking and talking like several different characters, including ''Luigi'', while [[BlatantLies still claiming to be Kooper]]. The one that impersonates Luigi even claims that you should trust him to be the real Kooper ''[[InsaneTrollLogic because you should trust your brother]]''.
28th Apr '17 3:29:31 PM ultimomant
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* ''WesternAnimation/HeManAndTheMastersOfTheUniverse1983'': In "She-Demon of Phantos", Skeletor tricks Queen Elmora by casting illusions so He-Man looks exactly like him, making her unable to tell them apart. He-Man solves it by asking Elmora to use her magic to tie both of them up with Photanium chains. He-Man could break through them, while Skeletor couldn't.

to:

* ''WesternAnimation/HeManAndTheMastersOfTheUniverse1983'': ''WesternAnimation/HeManAndTheMastersOfTheUniverse1983'':
**
In "She-Demon of Phantos", Skeletor tricks Queen Elmora by casting illusions so He-Man looks exactly like him, making her unable to tell them apart. He-Man solves it by asking Elmora to use her magic to tie both of them up with Photanium chains. He-Man could break through them, while Skeletor couldn't.couldn't.
** In "Double Trouble", the Mirror of Moravad creates doubles of people with opposite moralities. It eventually creates a heroic Skeletor who helps the heroes. When the double and real Skeletor fight, the heroes can't tell them apart, until He-Man asks both of them to say, "He-Man is my friend." The double said it without hesitation, while the real Skeletor angrily refused.
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