History Main / TrustPassword

14th May '17 2:09:25 PM Schismatism
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* ''Fanfic/HarryPotterAndTheMethodsOfRationality'' uses this a few times, most notably in the first few chapters. [=McGonnagall=] is flabbergasted when Harry first mentions that he actually ''has'' one, just in case of an ''unforeseeable'' eventuality when he'd need to use it.
4th May '17 9:33:44 AM Madrugada
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* Subverted in the ''Literature/{{Liavek}}'' story, "A Well-Made Plan" into SomethingOnlyTheyWouldSay. A {{Body Swap}}ped character shows up at his own front door and tries to convince his butler that it's really him. The butler asks for this trope, in the form of what the item that is the source of his magical power is (information that every magician keeps a closely held-secret, due to the way magic works in this universe). Instead of naming an item, the character explodes in fury, refuses to reveal it, then comments that since he'd never told the butler in the first place, there was no reason for the butler to expect him to answer. ''This'' is the response that the butler was looking for, and he gladly lets him in.
4th May '17 9:07:10 AM Madrugada
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* In an episode of ''Series/BuckRogersInTheTwentyFifthCentury'', Buck hijacks a Draconian fighter and must prove to another pilot that he's from Earth. The pilot is someone Buck had previously been stranded in the desert with and had shared stories of the past. In this case, Buck proved who he was by giving a description of OJ Simpson. Since Buck had left Earth in 1987, he had no idea that OJ may or may not have turned out to be a double murderer and since the show was filmed prior to this, neither did the writers.

to:

* In an episode of ''Series/BuckRogersInTheTwentyFifthCentury'', Buck hijacks a Draconian fighter and must prove to another pilot that he's from Earth. The pilot is someone Buck had previously been stranded in the desert with and had shared stories of the past. In this case, Buck proved who he was by giving a description of OJ Simpson. Since Buck had left Earth in 1987, he had no idea that OJ may or may not have turned out to be a double murderer and since the show was filmed prior to this, neither did the writers.
25th Apr '17 4:29:41 AM StFan
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[[folder:Web Animation]]
* In ''[[Machinima/RedVsBlue Red vs. Blue: Reconstruction]]'', Agent Washington verifies to the Reds that he is from Command by knowing Sarge's ultimate secret password: [[spoiler: it's "[[ThePasswordIsAlwaysSwordfish password]]".]]
[[/folder]]



* In ''HomeOnTheStrange'', Tanner [[http://www.homeonthestrange.com/view.php?ID=221 sets one of these up with Izzy,]] to the latter's bemusement.

to:

* In ''HomeOnTheStrange'', ''Webcomic/HomeOnTheStrange'', Tanner [[http://www.homeonthestrange.com/view.php?ID=221 sets one of these up with Izzy,]] to the latter's bemusement.



* In ''{{Webcomic/Homestuck}}'', Jade implements a system of these, though it's less about trust and more about trying to keep her conversations relatively linear, since the Trolls tend to skip around a lot regarding time shenanigans.
* In ''{{Webcomic/Skullkickers}}'', when Shorty and Baldy make a stop in a tavern while hunting a doppelganger, Baldy suggests establishing a trust password, so that they will know if the doppelganger is impersonating the other. Shorty suggests some passwords, but Baldy dismisses all of Shorty's suggestions [[spoiler:and kills the false "Shorty" on the spot. As it happens, they'd already established such a password.]]

to:

* In ''{{Webcomic/Homestuck}}'', ''Webcomic/{{Homestuck}}'', Jade implements a system of these, though it's less about trust and more about trying to keep her conversations relatively linear, since the Trolls tend to skip around a lot regarding time shenanigans.
* In ''{{Webcomic/Skullkickers}}'', ''Webcomic/{{Skullkickers}}'', when Shorty and Baldy make a stop in a tavern while hunting a doppelganger, Baldy suggests establishing a trust password, so that they will know if the doppelganger is impersonating the other. Shorty suggests some passwords, but Baldy dismisses all of Shorty's suggestions [[spoiler:and kills the false "Shorty" on the spot. As it happens, they'd already established such a password.]]



* In ''[[Machinima/RedVsBlue Red vs.Blue: Reconstruction]]'' Agent Washington verifies to the Reds that he is from Command by knowing Sarge's ultimate secret password: [[spoiler: it's "[[ThePasswordIsAlwaysSwordfish password]]".]]



* ''WebSerial/{{Worm}}'' has passwords as standard when fighting Strangers (who can mess with perceptions) and Masters (who can fight with others). The most prominent example of this is [[spoiler:after the [[VillainProtagonist protagonists]] capture and [[PeoplePuppets bodyjack]] Shadow Stalker in order to infiltrate the Wards. When Weld uses the standard password, they're able to make Shadow Stalker reply with the standard countersign indicating that she's uncompromised -- but they are at a loss when Weld asks who it was Shadow Stalker recently got in trouble for harassing. The incorrect response turns an until-then-successful infiltration into a firefight.]]

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* ''WebSerial/{{Worm}}'' ''Literature/{{Worm}}'' has passwords as standard when fighting Strangers (who can mess with perceptions) and Masters (who can fight with others). The most prominent example of this is [[spoiler:after the [[VillainProtagonist protagonists]] capture and [[PeoplePuppets bodyjack]] Shadow Stalker in order to infiltrate the Wards. When Weld uses the standard password, they're able to make Shadow Stalker reply with the standard countersign indicating that she's uncompromised -- but they are at a loss when Weld asks who it was Shadow Stalker recently got in trouble for harassing. The incorrect response turns an until-then-successful infiltration into a firefight.]]
22nd Apr '17 10:27:07 PM AthenaBlue
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* ''WesternAnimation/StarWarsRebels'': As revealed in [[Recap/StarWarsRebelsS3E08AnInsideMan "An Inside Man"]], [[ReverseMole Fulcrum II]] has "By the light of Lothal's moons" as a code phrase.

to:

* ''WesternAnimation/StarWarsRebels'': As revealed in ''WesternAnimation/StarWarsRebels'':
** [[Recap/StarWarsRebelsS2E06BloodSisters "Blood Sisters"]]: The courier Sabine and Ezra are sent to meet will respond to the code phrase "It's a long way to Alderaan."
**
[[Recap/StarWarsRebelsS3E08AnInsideMan "An Inside Man"]], Man"]] reveals that [[ReverseMole Fulcrum II]] has "By the light of Lothal's moons" as a code phrase.
20th Apr '17 2:21:49 PM TheSinful
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* In ''[[https://www.fanfiction.net/s/10541324/11/First-Knight First Knight]]'', when traveling through the screwed up space-time continuum in the [[EldritchLocation Overlook]] [[Literature/TheShining Hotel]], guardians/caretakers like Xander formally greet alternates of people they've met to check if they're real and if they're hostile. When an alternate Warren comes across Xander's group in the stairwell, he refers to Xander as a guardian and only relaxes after Xander explains he's just the caretaker.
13th Apr '17 12:37:05 AM DrFraud
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* In ''[[https://www.fanfiction.net/s/9982120/8/Avenging-Harry-Potter Avenging Harry Potter]]'' Harry holds a phone conversation with a worried Hermione shortly after being rescued from captivity.
-->'''Hermione:''' If I solemnly swear that I'm up to no good how do we end?\\
'''Harry:''' We've managed the mischief.
11th Apr '17 9:11:47 PM AthenaBlue
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* In ''WesternAnimation/JusticeLeague'', when Flash and Lex Luthor switch minds, Flash proves he's really himself again by starting to reveal Green Lantern's old nickname.
* In ''WesternAnimation/SonicBoom'' episode "Hedgehog Day", Eggman asks Sonic and Tails what he can say in order to convince them quickly that the time loop exists. After time resets itself again:
-->'''Tails:''' There's no such thing as a time--\\
'''Eggman:''' Last night, you dreamed you were being chased by a giant sock puppet.

to:

* ''WesternAnimation/BatmanTheBraveAndTheBold'':
**
In ''WesternAnimation/JusticeLeague'', when Flash "The Criss-Cross Conspiracy!", Batman is trapped in Batwoman's body. Nightwing asks him to prove it by saying something only Batman would know.
-->'''Batman:''' Your favorite color is blue, you used to sleep with a night light,
and Lex Luthor switch minds, Flash proves he's really you're deathly afraid of monkeys.\\
'''Nightwing:''' It's him.
** When Batman is [[AstralProjection projecting
himself again by starting to reveal astrally]] after being BuriedAlive (ItMakesSenseInContext), he possesses Speedy and starts telling Green Lantern's old nickname.
* In ''WesternAnimation/SonicBoom'' episode "Hedgehog Day", Eggman asks Sonic
Arrow about what's going on. Arrow initially thinks it's Speedy doing an impression, before Bats grabs him by the hem of his shirt and Tails what he can say in order threatens him to convince them quickly that the time loop exists. After time resets itself again:
-->'''Tails:''' There's no such thing as a time--\\
'''Eggman:''' Last night, you dreamed you were being chased by a giant sock puppet.
his face.
-->"It really is you, isn't it?"



* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'':
** In the two-parter "A Canterlot Wedding", Twilight and Cadance have a rhyme from way back when. [[spoiler:When the false Cadance doesn't know it, Twilight smells a rat. When, due to Fake Cadance's manipulations, she nearly blasts the head off the real one, the Real Cadance does this to prove it's really her this time.]]
** In the sixth season finale, "To Where and Back Again", Starlight Glimmer and her team, venturing into a kingdom full of [[VoluntaryShapeshifting Changelings]], use the phrase "klutzy draconequus" as a trust password. Discord isn't exactly pleased.

to:

* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'':
**
In the two-parter "A Canterlot Wedding", Twilight and Cadance have a rhyme from way back when. [[spoiler:When the false Cadance doesn't know it, Twilight smells a rat. When, due to Fake Cadance's manipulations, she nearly blasts the head off the real one, the Real Cadance does this to prove it's really her this time.]]
** In the sixth season finale, "To Where and Back Again", Starlight Glimmer and her team, venturing
''WesternAnimation/DynomuttDogWonder'', when Manyfaces has tricked Dynomutt into a kingdom full of [[VoluntaryShapeshifting Changelings]], use believing that Blue Falcon is an impostor, the phrase "klutzy draconequus" as a trust password. Discord isn't exactly pleased.hero proves himself by showing his friend that he knows Dynomutt's "one ticklish spot".



* In ''WesternAnimation/JusticeLeague'', when Flash and Lex Luthor switch minds, Flash proves he's really himself again by starting to reveal Green Lantern's old nickname.
* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'':
** In the two-parter "A Canterlot Wedding", Twilight and Cadance have a rhyme from way back when. [[spoiler:When the false Cadance doesn't know it, Twilight smells a rat. When, due to Fake Cadance's manipulations, she nearly blasts the head off the real one, the Real Cadance does this to prove it's really her this time.]]
** In the sixth season finale, "To Where and Back Again", Starlight Glimmer and her team, venturing into a kingdom full of [[VoluntaryShapeshifting Changelings]], use the phrase "klutzy draconequus" as a trust password. Discord isn't exactly pleased.
* In the ''WesternAnimation/SonicBoom'' episode "Hedgehog Day", Eggman asks Sonic and Tails what he can say in order to convince them quickly that the time loop exists. After time resets itself again:
-->'''Tails:''' There's no such thing as a time--\\
'''Eggman:''' Last night, you dreamed you were being chased by a giant sock puppet.



* ''WesternAnimation/BatmanTheBraveAndTheBold'':
** In "The Criss-Cross Conspiracy!", Batman is trapped in Batwoman's body. Nightwing asks him to prove it by saying something only Batman would know.
-->'''Batman:''' Your favorite color is blue, you used to sleep with a night light, and you're deathly afraid of monkeys.\\
'''Nightwing:''' It's him.
** When Batman is [[AstralProjection projecting himself astrally]] after being BuriedAlive (ItMakesSenseInContext), he possesses Speedy and starts telling Green Arrow about what's going on. Arrow initially thinks it's Speedy doing an impression, before Bats grabs him by the hem of his shirt and threatens him to his face.
-->"It really is you, isn't it?"
* In ''WesternAnimation/DynomuttDogWonder'', when Manyfaces has tricked Dynomutt into believing that Blue Falcon is an impostor, the hero proves himself by showing his friend that he knows Dynomutt's "one ticklish spot".

to:

* ''WesternAnimation/BatmanTheBraveAndTheBold'':
** In "The Criss-Cross Conspiracy!", Batman is trapped
''WesternAnimation/StarWarsRebels'': As revealed in Batwoman's body. Nightwing asks him to prove it by saying something only Batman would know.
-->'''Batman:''' Your favorite color is blue, you used to sleep with a night light, and you're deathly afraid of monkeys.\\
'''Nightwing:''' It's him.
** When Batman is [[AstralProjection projecting himself astrally]] after being BuriedAlive (ItMakesSenseInContext), he possesses Speedy and starts telling Green Arrow about what's going on. Arrow initially thinks it's Speedy doing an impression, before Bats grabs him by
[[Recap/StarWarsRebelsS3E08AnInsideMan "An Inside Man"]], [[ReverseMole Fulcrum II]] has "By the hem light of his shirt and threatens him to his face.
-->"It really is you, isn't it?"
* In ''WesternAnimation/DynomuttDogWonder'', when Manyfaces has tricked Dynomutt into believing that Blue Falcon is an impostor, the hero proves himself by showing his friend that he knows Dynomutt's "one ticklish spot".
Lothal's moons" as a code phrase.


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16th Mar '17 3:42:31 PM AthenaBlue
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* On ''Series/ThirtyRock'', Nathan Lane shows up claiming to be Jack's brother, and Liz is suspicious because Jack has never mentioned a brother and this man pronounces their last name "Dona-hee" as opposed to "Dona-gee." Then he comments that she would be prettier if she didn't scowl, and she knows he's related to [[VitriolicBestBuds Jack]].
* In the first-season finale of ''Series/AgentsOfSHIELD'', Skye convinces Mike she has his son by having Ace repeat what they said to each other in the pilot.



* In one episode of ''{{Series/Bones}}'', a boy is kidnapped. Booth asks the dad what password he can use so the boy will trust him during the rescue. (It turns out to be "Paladin" -- ''i.e.'' "defender of the faith", which as his boss notes is an oddly appropriate one for a Catholic FBI agent.)
* In an episode of ''Series/BuckRogersInTheTwentyFifthCentury'', Buck hijacks a Draconian fighter and must prove to another pilot that he's from Earth. The pilot is someone Buck had previously been stranded in the desert with and had shared stories of the past. In this case, Buck proved who he was by giving a description of OJ Simpson. Since Buck had left Earth in 1987, he had no idea that OJ may or may not have turned out to be a double murderer and since the show was filmed prior to this, neither did the writers.
* ''Series/BuffyTheVampireSlayer'' was never known to use this trope straight, which makes sense, as it was written by Creator/JossWhedon (who also gave us [[Film/XMen1 Wolverine's "You're a dick" line]]):
** Giles tries to prove his identity:
-->'''Giles:''' Cordelia, it's me! It's me!\\
'''Cordelia:''' How do we know it's really you and not zombie Giles?\\
'''Giles:''' Cordelia, do stop being tiresome.\\
'''Cordelia:''' It's him.
** Xander does the [[{{ComicStrip/Peanuts}} Snoopy Dance]] to prove he's Xander for Willow.
** Xander tells a story about one of his early birthdays to prove his identity. He wanted a fire truck but didn't get one, which made him sad, but then the neighbor's house caught fire for real, and he got to see real fire trucks. He adds that he always thought Willow might have set the fire ("if you did you can tell me"). The problem with this is ''(a)'' he's trying to prove he's not his EvilTwin, who would know this anyway, and ''(b)'' Willow wasn't aware that there ''was'' a twin and thus had no reason to doubt he was Xander.
* ''Series/{{Charmed}}'':
** In "That 70's Episode", Prue and Piper convince their past selves to trust them by opening a trick drawer in a cabinet.
** Piper attempts it in another episode, telling their mother they can be trusted because they know she's pregnant with Phoebe. It backfires because not only does she not know, she believes she's infertile.



** In the two-parter "Human Nature"/"The Family of Blood", Martha Jones, a medical student from the future disguised as a maid, uses her knowledge of anatomy to prove that she's more than she seems.
** In the Series Four episode "Forest of the Dead," Professor Song [[spoiler: whispers the Doctor's name into his ear]] to prove that she knows him in the future.



** In [[Recap/DoctorWhoS29E8HumanNature "Human Nature"]]/[[Recap/DoctorWhoS29E9TheFamilyOfBlood "The Family of Blood"]], Martha Jones, a medical student from the future disguised as a maid, uses her knowledge of anatomy to prove that she's more than she seems.
** In [[Recap/DoctorWhoS30E9ForestOfTheDead "Forest of the Dead"]], Professor River Song [[spoiler: whispers the Doctor's name into his ear]] to prove that she knows him in the future.



** From the series six premiere, when Amy needs to get the Doctor to trust her, she tells him a detail only they would know: the Doctor's WackyCravings from their first meeting:

to:

** From the series six premiere, [[Recap/DoctorWhoS32E1TheImpossibleAstronaut "The Impossible Astronaut"]]: when Amy needs to get the Doctor to trust her, she tells him a detail only they would know: the Doctor's WackyCravings from their first meeting:



* An unintentional variation occurs in ''Series/{{Farscape}}''. John is having a normal conversation with Aeryn until he mentions [[spoiler:her baby]] and she doesn't know what he's talking about. This gives away that she is a [[spoiler:bioloid duplicate and the real Aeryn has been kidnapped]].
* In ''Series/JessicaJones2015'', Trish and Jessica decide they need some sort of signal to indicate Jess is not under Kilgrave's mind control. Since Kilgrave would make Jessica pretend like everything's normal, they decide to use a phrase that Jessica [[SomethingTheyWouldNeverSay would never say:]] [[spoiler:"I love you."]]
-->'''Trish:''' You say it, you're still you.
* In one episode of ''Series/LoisAndClark'', a time-traveller is able to enlist Clark's aid by whispering to him, "I know you're Superman, and I need your help."



** In season 4 episode "The Constant," 2004-Daniel tells Desmond to tell 1996-Daniel that [[spoiler:he knows about Eloise, and give him some important numbers for an experiment. This proves to Daniel that Desmond is traveling in time and has spoken to a future version of Daniel]].

to:

** In season 4 episode "The Constant," Constant", 2004-Daniel tells Desmond to tell 1996-Daniel that [[spoiler:he knows about Eloise, and give him some important numbers for an experiment. This proves to Daniel that Desmond is traveling in time and has spoken to a future version of Daniel]].



* In the series 2 premiere of ''{{Series/Misfits}}'', the gang have to deal with a shapeshifter. In order to make sure it's really them, they greet each other with "Monkeyslut!" As befits their general methods, this is horribly ineffective. When one of them does encounter the shifter, he just says it with prompting, and fails to notice the shifter's look of confusion.
* ''Series/QuantumLeap'': Sam has leaped into an illiterate murderer on the run who is holding a woman and her daughter hostage. He decides to drop the {{masquerade}}, telling her he's a doctor from the future in a TimeTravel experiment. She doesn't believe him. Then he notices her medical textbook, and she reveals that she's in medical school. So he has her quiz him on medical stuff to prove that he's telling the truth. At first she still doesn't believe him, saying that he looked at the book already, so could have memorized the information. Sam quickly fires back: "When was the last time you met an illiterate speed-reader?"
* In an episode of ''Series/SaluteYourShorts'', Camp Anawana is playing a very intense game of CaptureTheFlag with a rival camp. Pinsky ends up going to Donkeylips for help. Donkeylips and Z.Z. aren't sure if he's real or an impostor, so Donkeylips decides to ask him something that he told him earlier in the episode.
-->'''Donkeylips:''' What are the four S's of warfare?\\
'''Pinsky:''' Strength, strategy, and surprise.\\
'''Z.Z.:''' It's Pinsky!\\
'''Donkeylips:''' Shhhh!\\
'''Pinsky:''' That's the fourth S.
* TimeTravel was the whole point of ''Series/SevenDays'', and the team set up a code phrase for the protagonist to use so that they'd always know when he had shown up from the future, and they weren't dealing with a hoax. The password used is Frank contacting Backstep and identifying himself as "Conundrum". Interestingly, it was never used this way after the first episode, once the team knows full well who he is -- it's just a signal for them to put him through to the right people.
* In ''Series/SleepyHollow'', Ichabod and Abbie use a fist-bump to identify each other in Purgatory, as Abbie had recently taught it to Ichabod. Also while in Purgatory, Abbie correctly identifies a Crane imposter since the fake didn't pronounce her title using Crane's insistent British pronunciation: "Lef-tenant".
* ''{{Series/Smallville}}''
** In "Transference", Clark Kent and Lionel Luthor [[FreakyFridayFlip swap bodies]]. In Lionel's body, Clark convinces Ma Kent it's really him by telling the story of how he discovered SuperSpeed at age 6.
** Subverted in "Apocalypse": Clark tries to prove he's a friend to Chloe by revealing some of their past experiences, but since he's in an AlternateUniverse where they have never met, it fails.



* TimeTravel was the whole point of ''Series/SevenDays'', and the team set up a code phrase for the protagonist to use so that they'd always know when he had shown up from the future, and they weren't dealing with a hoax. The password used is Frank contacting Backstep and identifying himself as "Conundrum". Interestingly, it was never used this way after the first episode, once the team knows full well who he is -- it's just a signal for them to put him through to the right people.
* In one episode of ''Series/LoisAndClark'', a time-traveller is able to enlist Clark's aid by whispering to him, "I know you're Superman, and I need your help."
* ''Series/{{Charmed}}'':
** In "That 70's Episode", Prue and Piper convince their past selves to trust them by opening a trick drawer in a cabinet.
** Piper attempts it in another episode, telling their mother they can be trusted because they know she's pregnant with Phoebe. It backfires because not only does she not know, she believes she's infertile.



* In an episode of ''Series/BuckRogersInTheTwentyFifthCentury'', Buck hijacks a Draconian fighter and must prove to another pilot that he's from Earth. The pilot is someone Buck had previously been stranded in the desert with and had shared stories of the past. In this case, Buck proved who he was by giving a description of OJ Simpson. Since Buck had left Earth in 1987, he had no idea that OJ may or may not have turned out to be a double murderer and since the show was filmed prior to this, neither did the writers.
* ''Series/BuffyTheVampireSlayer'' was never known to use this trope straight, which makes sense, as it was written by Creator/JossWhedon (who also gave us [[Film/XMen1 Wolverine's "You're a dick" line]]):
** Giles tries to prove his identity:
-->'''Giles:''' Cordelia, it's me! It's me!\\
'''Cordelia:''' How do we know it's really you and not zombie Giles?\\
'''Giles:''' Cordelia, do stop being tiresome.\\
'''Cordelia:''' It's him.
** Xander does the [[{{ComicStrip/Peanuts}} Snoopy Dance]] to prove he's Xander for Willow.
** Xander tells a story about one of his early birthdays to prove his identity. He wanted a fire truck but didn't get one, which made him sad, but then the neighbor's house caught fire for real, and he got to see real fire trucks. He adds that he always thought Willow might have set the fire ("if you did you can tell me"). The problem with this is ''(a)'' he's trying to prove he's not his EvilTwin, who would know this anyway, and ''(b)'' Willow wasn't aware that there ''was'' a twin and thus had no reason to doubt he was Xander.
* In one episode of ''{{Series/Bones}}'', a boy is kidnapped. Booth asks the dad what password he can use so the boy will trust him during the rescue. (It turns out to be "Paladin" -- ''i.e.'' "defender of the faith", which as his boss notes is an oddly appropriate one for a Catholic FBI agent.)



* In the series 2 premiere of ''{{Series/Misfits}}'', the gang have to deal with a shapeshifter. In order to make sure it's really them, they greet each other with "Monkeyslut!" As befits their general methods, this is horribly ineffective. When one of them does encounter the shifter, he just says it with prompting, and fails to notice the shifter's look of confusion.
* An unintentional variation occurs in ''Series/{{Farscape}}''. John is having a normal conversation with Aeryn until he mentions [[spoiler:her baby]] and she doesn't know what he's talking about. This gives away that she is a [[spoiler:bioloid duplicate and the real Aeryn has been kidnapped]].
* ''{{Series/Smallville}}''
** In "Transference", Clark Kent and Lionel Luthor [[FreakyFridayFlip swap bodies]]. In Lionel's body, Clark convinces Ma Kent it's really him by telling the story of how he discovered SuperSpeed at age 6.
** Subverted in "Apocalypse": Clark tries to prove he's a friend to Chloe by revealing some of their past experiences, but since he's in an AlternateUniverse where they have never met, it fails.



* On ''Series/ThirtyRock'', Nathan Lane shows up claiming to be Jack's brother, and Liz is suspicious because Jack has never mentioned a brother and this man pronounces their last name "Dona-hee" as opposed to "Dona-gee." Then he comments that she would be prettier if she didn't scowl, and she knows he's related to [[VitriolicBestBuds Jack]].
* In the first-season finale of ''Series/AgentsOfSHIELD'', Skye convinces Mike she has his son by having Ace repeat what they said to each other in the pilot.
* In an episode of ''Series/SaluteYourShorts'', Camp Anawana is playing a very intense game of CaptureTheFlag with a rival camp. Pinsky ends up going to Donkeylips for help. Donkeylips and Z.Z. aren't sure if he's real or an impostor, so Donkeylips decides to ask him something that he told him earlier in the episode.
-->'''Donkeylips:''' What are the four S's of warfare?\\
'''Pinsky:''' Strength, strategy, and surprise.\\
'''Z.Z.:''' It's Pinsky!\\
'''Donkeylips:''' Shhhh!\\
'''Pinsky:''' That's the fourth S.
* In ''Series/SleepyHollow'', Ichabod and Abbie use a fist-bump to identify each other in Purgatory, as Abbie had recently taught it to Ichabod. Also while in Purgatory, Abbie correctly identifies a Crane imposter since the fake didn't pronounce her title using Crane's insistent British pronunciation: "Lef-tenant".
* In ''Series/JessicaJones2015'', Trish and Jessica decide they need some sort of signal to indicate Jess is not under Kilgrave's mind control. Since Kilgrave would make Jessica pretend like everything's normal, they decide to use a phrase that Jessica [[SomethingTheyWouldNeverSay would never say:]] [[spoiler:"I love you."]]
-->'''Trish:''' You say it, you're still you.
* ''Series/QuantumLeap'': Sam has leaped into an illiterate murderer on the run who is holding a woman and her daughter hostage. He decides to drop the {{masquerade}}, telling her he's a doctor from the future in a TimeTravel experiment. She doesn't believe him. Then he notices her medical textbook, and she reveals that she's in medical school. So he has her quiz him on medical stuff to prove that he's telling the truth. At first she still doesn't believe him, saying that he looked at the book already, so could have memorized the information. Sam quickly fires back: "When was the last time you met an illiterate speed-reader?"
12th Mar '17 5:19:38 PM JamesShade
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* In ''Film/TerminatorGenisys'', when Sarah encounters Future John Connor, she suspects him to be a shapeshifted terminator. Connor gains her trust by citing details of the past that only John Connor would know. [[spoiler: Subverted, it turns out he's a shapeshifted Terminator made from Connor's body]].

to:

* In ''Film/TerminatorGenisys'', when Sarah encounters Future John Connor, she suspects him to be a shapeshifted terminator. Connor gains her trust by citing details of the past that only John Connor would know. [[spoiler: Subverted, it turns out he's a shapeshifted Terminator Terminator-human hybrid made from Connor's body]].
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http://tvtropes.org/pmwiki/article_history.php?article=Main.TrustPassword