Memory Gambit andNeuro Vault meetDeep-Cover Agent. A person isBrainwashed so that, on a certain trigger (either a situation, or else aphrase only someone in the know would ever say), they will go from their normal self toThe Mole; they will most often remember nothing afterward.

See alsoBrainwashed,Berserk Button,Morality Dial,Tomato in the Mirror,Conveniently Unverifiable Cover Story andLotus Eater Machine. CompareMemory Gambit, which is when you do this to yourself. May requireDeprogramming to cure.

Anime and Manga

• Lost Brain pulls this one.
• Tengen Toppa Gurren Lagann hasNia becoming the agent of the Anti-Spirals when the population reaches 1 million.
• Happens inNaruto Shippuden with Sasori's spies (Yuura andKabuto.)
• Anew Returner inMobile Suit Gundam 00. In this case, the trigger is the presence of a particular person:her twin brother, Revive Revival, who gets captured midway the series and "resets" her.
• Kirika fromNoir. She was an incredibly awesome assassinbefore. Fear what she became.
• Lelouch's mind-controllingEvil Eye lets him give people orders that cannot be refused, and in addition to the immediateBrainwashed victims, he can also create a Manchurian Agent by applying special conditions to the command. For example, he made a Britannian officer into a Manchurian agent that would see him asPrincess Cornelia (under whose command he was) when he grabbed his collar.
• Covered by the one-off character of Twyla inVoltron.
• Mitsuki, and probably the other Wolves inDoubt
• Occurs inMahou Sensei Negima withShiori. In this case, it seems to simply be a decoy to keep Ala Alba from noticing something particular, but Mananotes that they can't rule out the possibility of aTrigger Phrase.
• InTantei Gakuen Q,Pluto/Meiousei does this all the time to its clients and its own agents as a failsafe - on the trigger, they'll kill witnesses, or themselves, or go insane... and it's not pretty.
• InDeath Note,Light acts as a Manchurian Agent on behalf ofhimself. One of the most ingenious plot twists in a series full of plot twists.
• Dance in the Vampire Bund provides the nanotechnology known as the "Pied Piper" which when applied to vampires forces their mind to register any orders they receive as coming directly from theiroverlord ("Release the insane werewolf and lock down your HQ so you are trapped with it? Of course My Liege").

Comic Books

• InAssassin's Creed: The Fall,Daniel serves this role inWarren Vidic'sXanatos Roulette to weed out the Assassin Order.
• Blue Beetle, in a memorable and bloody couple of issues ofJustice League International; they ultimately had to resort to aJourney to the Center of the Mind to get him deprogrammed.
• Titans/Flash supporting character Frances Kane was originally programmed this way by hertherapist, probably contributing to herlater mental problems.
• In the comic bookOne Hundred Bullets, the phrase (used to cause old memories to re-emerge rather than force them to do something against their will) is "Croatoa."
• Subverted in an issue ofJustice League Adventures, where this is attempted against the subject's will, but whoever it was made the mistake of choosingThe Question as their mole. He's so paranoid, he actuallyfound himself out before he could do any damage.
• These turn out to be central to the plot ofHondo-City Justice - a large number of girls with alien DNA are triggered to kill the drokk out of anyYakuza members they happen to see. Asahara manages to overcome it.
• In the conclusion of theDaredevil "Shadowlands" event,Typhoid Mary was revealed to be Kingpin's Manchurian Agent.
• Inverted in theMarvelTransformers comics when Ratchet, forced by Megatron to rebuildStarscream as a Pretender, hides Starscream's true personality deep in his neural circuits. Megatron then sends the "new" Starscream against the Autobots and Decepticons on Earth. One shot from Hot Rod damages Starscream, and heimmediately reverts to theDirty Coward we all know and love.

Film

• The near-eponymous (technically speaking, the Manchurian Agent isn't the "Manchurian Candidate", but that's nitpicking)The Manchurian Candidate (The Film of the Book). There are currently two adaptations, the 1962 adaptation and the 2004 adaptation.
• Total Recall.
• Arguably, the entire population ofThe Matrix, being as how anyone who hasn't been freed from the Matrix can become an Agent at any time. It's arguable because, while the result is the same, from the perspective of anyone inside the Matrix they physically turn into an Agent.
• In the movieZoolander, the title character is hypnotized into becoming a berserk assassin when he hears the song "Relax" byFrankie Goes to Hollywood.
• More or less the entire point of the moveThe Curse of the Jade Scorpion. One of the key words was "Madagascar". Bonus points in that one of the people thus hypnotized was the detective in charge of his own investigation, and doesn't realize it.
• Telefon (1977). The KGB plant 51 such agents with fake identities in the United States, programmed to commit acts of sabotage on receiving aTrigger Phrase. Unfortunately a fanatical Stalinist opposed to détente steals the list of agents, and the Soviets have to sent Charles Bronson to stop him.
• Morgan Sullivan was his own Manchurian Agent in the movieCypher.
• This is demonstrated inThe Naked Gun.

Ludwig: Tell me, Mr.Pahpshmir, in all the world, who is the most effective assassin? Pahpshmir: Well, l would think anyone who manages to conceal his identity as an assassin. Ludwig: Yes, but there is an even more ideal assassin: one who doesn't know he is an assassin. [The help, Dominique, enters the room] Dominique: Care for some tea? Pahpshmir: Yes, please. Ludwig: Dominique, service for two, please. [Dominique turns to leave] [Ludwig presses a remote control which sets off the mind-control device in her watch] [Dominique gets aThousand-Yard Stare and grabs a gun from a nearby drawer] [She points the gun at Pahpshmir, who recoils in his seat in terror] Dominique:[robotically] I must kill Pahpshmir. [Dominique fires the unloaded gun six times, then puts the gun to her head and fires five more times] [Ludwig presses the remote again, turning off the mind control] Dominique:[turning to Ludwig as if nothing had happened] Will that be with cream and sugar, sir?

• Going Berserk - John Candy's character is brainwashed by a cult to assassinate his fiancée's congressman father using a playing card as a trigger. Something goes wrong in the hypnotism though, and the trigger doesn't make him a cold-blooded assassin as much as a loud obnoxious asshole -Hilarity Ensues.

Literature

• In the fourthA Series of Unfortunate Events book,Klaus is repeatedly taken in and out of a brainwashed state, which is triggered by the word "lucky" and ended by the word "inordinate."
• In David Wingrove'sChung Kuo, a servant is made to attack General Tolonen
• Richard Condon'sThe Manchurian Candidate. TheTrope Namer.
• In Frank Herbert'sDune, the Bene Gesserit can use psychosexual conditioning techniques (called hypno-ligation) to control people. They can trigger their victims by using code words.
  • The ghola Hayt has a trigger word that is intended to trigger an assassination. His ability to resist it becomes something of a plot point.
• Dean Koontz'Night Chills has an entire town of sleepers triggered by the phrase "I am the key".
• In theStar Wars Expanded Universe, one of theX-Wing books used this. The trigger phrase, different for each agent, was a nonsensical problem (for example, "Those Wookiees are dancing in the parlor again") that instantly became the sole focus of the brainwashed person's life - and the only way to "solve the problem" was to carry out the preprogrammed mission, usually an assassination.
  • An earlier X-Wing book had a version not triggered by a code phrase, caused by long-term torture and reconditioning in the Lusankya prison. These agents would be unaware of what Isard had done until they were triggered, at which point they becameApologetic Adversaries. The example above was considered more dangerous because it could be engineered by only a day's worth of chemical treatments after kidnapping the target, and it also managed to stir upFantastic Racism by, for example, causing a fleetwide suspension on Twi'lek pilots.
• The IPCRESS File.^[context?]
• Imriel inKushiel's Mercy: the trigger is kissing his beloved.
• Lord Byron wasalmost used as one of these inTim Powers'The Anubis Gates.
• Inverted in theLord Darcy storyA Case Of Identity, whereLord Seiger is a homicidal maniac when in hisnatural state, but has been constrained by mental healers' geas effects to be entirely harmless and trustworthy.At least, until he's fed the correct trigger phrase by his superior in the Angevin royal spy organization, which unleashes his fullAx Crazy lethality on enemies of the Crown.
• The Glass Books of the Dream Eaters features a trigger phrase known only to the highest echelon of the Cabal, used on those who have undergone the Process, that makes themfollow the instructions given by the person who uses the phrase to the letter. It varies based on several factors; it includes a colour ("blue" for those who underwent the Process at the Institute, "orange" for those who underwent it at Harschmort,) a Biblical reference ("Magdalene" for the recruited followers, "Caesar" for the officers, etc.,) the place they were recruited ("Royale" for the Hotel Royale, "Regiment" for the army,) and the words "ice consumption." So, for example, the Countess uses "orange Magdalene orange Royale ice consumption" onMiss Temple, when trying to determine whether or not she underwent the Process at Harschmort.
• In theCaptain Underpants books, Mr. Krupp turns into Captain Underpants when he hears fingers snapping, and returns to normal when water is poured on his head.
• Programming people is routine for protagonist's agency inOleg Divov'sBrothers in Reason.The main character himself as well ashis half-brother are programmed to shoottheir father on sight, one with a gun and the other with a laser implanted in the forearm. The first one is revealed when he begins to suspect something and asks his half-brother to hypnotize him. When he becomes aware of the programming, he is now free to disobey it.
  • It is standard policy for all agency employees to undergo brainwashing whenever amole is suspected.
  • This is the same agency that psychically zombifies the entire population of Earth into loving everything Russian, the ultimate psychotronic weapon.
• In theShadowrun novelNight's Pawn, aMega Corp executive's daughter is programmed to kill her father as soon as they're alone together. Worse, she's programmed to do so with a concealed bone spur that can't be detected on scans ... and that's designed to slit her own arteries as it emerges, causing her to bleed to death and thus be unable to explain what happened to her.
• InThe Dresden Files novelTurn Coat, there are abounding fears within the White Council of Wizards that there are traitors running amok after one of the Senior Council is murdered. It turns out that someone has been mucking with the heads ofthe entire younger generation of wizards, turning them into sleeping assassins/suicide bombers, including Captain Luccio, the head of the Wardens. On top of that,all of the other wizards have been quietly influenced by subtle mind-control enchantments over the course of the war.

Live Action Television

• Several episodes ofThe Wild Wild West.
• Firefly's River Tam, although it's only really seen inThe Movie,Serenity. Her trigger was a subliminal message buried in a Fruity Oaty Bars commercial, which caused her to go intomartial-arts-killing-machine mode.
• Talia Winters inBabylon 5,and Garibaldi in season 4.
• Spike in season seven ofBuffy the Vampire Slayer. The trigger is "Early One Morning," a song his mother used to sing when he was a child.
• The Romulans do this to LaForge in theStar Trek: The Next Generation episode "The Mind's Eye".
  • In theStar Trek: Deep Space Nine episode "Inquisition", Bashir is accused of being one of theseby Section 31. He's not, it's all just a test by theSecret Police.
• This is the setup forMy Own Worst Enemy, which features one.
  • This is an inversion, though, as Edward Albright, the spy, is the original personality, and Henry Spivey, a quiet middle-management office employee with a wife and two kids, is the implanted cover.
  • The whole premise of the show is the breakdown of the chip that separates the two lives and Henry becoming aware of his alter-ego. Cue the inexperienced Henry going on missions, and Edward sleeping with Henry's wife.
• This was a favourite tactic of the aliens in the 1970s British sci-fi seriesUFO.
• A couple episodes ofStargate SG-1 use this.The agents trigger to a particular event or time after being brainwashed to do so, kill the target(s) and then themselves.
• Done twice in theMacGyver episode "Brainwashed." Jack Dalton and Pete Thornton are both programmed with different code phrases buried in the speech to be given by the president of a fictional African country they're programmed to assassinate. The simultaneous missing weekend over which they were programmed is covered byFake Memories.
• InBig Wolf on Campus, the Evil Werewolf Syndicate try to increase their numbers by doing this to Tommy; whenever he hears the code phrase he's supposed to bite the nearest person.
• The alien "sleeper agents" onTorchwood.
  • Also in the episode "They Keep Killing Suzie", where a certain someoneSuzie encodes multiple triggers into a hapless man she met at a philosophical groupin order to get herself brought back from the dead and take over Torchwood.
• Mellie and Perrin inDollhouse.

Adelle DeWitt: There are three flowers in a vase. The third flower is green.

• The episode "Attack Angels" ofCharlie's Angels features a villain who runs a business creating examples of this trope and selling their services to other villains.
• Sharon Valerii from the 2000sBattlestar Galactica.
• Rocko fromPuppets Who Kill was brainwashed into becoming an assassin for the government in one episode. The trigger to switch him between normal and brainwashed was to show him a Jack of Diamonds. Naturally, this led to a whole bunch of stuff happening that made the two scientists stop and note that they shouldn't have used something as common as playing cards for the trigger.
• Get Smart - Max is abducted and brainwashed to assassinate the Chief over their usual chess game at the club - an employee is the KAOS agent behind the scheme and knows the Chief always wins, so he makes "Checkmate" the trigger. It'sGet Smart--of course it doesn't work as planned.
• Derren Brown's special "The Heist" was a real-life attempt at creating four of these.
  • In case you're wondering...75% success rate.
  • In hisThe Events special, he picks a susceptible person in a cafe and then programs the guy to steal a TV when he sees a girl wearing red and holding a balloon. The guy does and then tries to come up with a lame excuse for his behavior when caught.
  • He goes evenfurther in the special "The Assassin". He picks a susceptible person from his audience and then spends some time programming him to respond to the polka dot pattern (which puts him into a susceptible trance after which he doesn't remember anything) and a specific ringtone (that causes him to think he's still at the shooting range firing at a target). The only other thing that is required is someone to tell him who the target is. In this case, it'sStephen Fry.The guy successfully "assassinates" the actor in the middle of a crowded theater; luckily, Derren is there to clear things up and remove the conditioning. Derren keeps referring back to the assassination of Bobby Kennedy, whose killer Sirhan Sirhan has been claiming for decades that he's been programmed by the CIA.
• The|Mission Impossible episode "Mindbend".
• TheVega$ episode "Lost Monday" has Binzer being hypnotized into constructing and detonating a bomb. The hypnotist instructs him to respond to the trigger word "superstar".
• In theFarscape episode "A Prefect Murder", Aeryn is turned into one via a mind-controlling bug. There's also a subversion: after being bitten. John pieces together what's happening just in time to hand over his weapon and leave the area.
• An episode ofThe Outer Limits deals with a prep school which is a front for an agency training these. It is revealed at the end that their "recruits" have infiltrated many agencies, including law enforcement. Programming is done with an implanted computer chip, although it fails with someone who has ulcers due to a treatment formerly prescribed for it.
• In the (original) TV series ofV, Ham Tyler is brainwashed to kill resistance leader Michael Donovan.
• In one episode ofInSecurity, N'udu is brainwashed and assigned to kill his best friend.
• Theentire human race becomes one inDoctor Who. The Silence's ability to control humanity via post-hypnotic suggestion ends up accidentally backfiring in the most spectacular way possible when one of them is recorded accidentally uttering the following words, which is then broadcast to the whole planet during the Moon-landing.

Silence: You shouldkill us all on sight.

Tabletop Games

• There is something close to a meta example inBetrayal at House on the Hill. Part of the game is "The Haunt". In "The Haunt", usually one of the PCs is revealed to have been narratively been "the traitor" all along. But in the gameplay, who the traitor is, and even if there is a traitor, is determined when The Haunt starts. Before that, the player doesn't know!

Video Games

• InBioShock (series),the main character would obey any command he heard that was accompanied by the phrase "would you kindly." Slightly different than most, in that it didn't put him into any kind of trance, it just made him decide that's what must be done. The details on how exactly it works are somewhat lost, asthe main character is a silent protagonist. And since the commands are all immediately handed toyou as mission objectives, you really don't have much choice in the matter.
• Kilrathi defector "Hobbes" was revealed as one of these inWing Commander 3: Heart of the Tiger, with the trigger phrase... "Heart of the Tiger".
• Luke inTales of the Abyss, who was programmed tounleash ahyperresonnance when he heard the trigger phrase.
• Boyd, aka "The Milkman" inPsychonauts apparently had some sort of subliminal trigger implanted in his already fragmented mind by theBig Bad. WhenRaz accidentally released that trigger while exploring his mind, he followed those implanted orders to destroy the asylum and cover up anything that went on there.However, it takes him quite a long time to finally do it, because the final passcode hadn't been given. Fred says it completely by coincidence as he leaves the asylum.
• Cloud fromFinal Fantasy VII probably counts.
• Alex Mason inCall of Duty: Black Ops is programmed tokill President Kennedy. It's not outright stated whether this succeeded or not, but it's heavily implied.

Mason: You tried to make me kill my own President! Dragovitch: *laughs*Tried?

• In an overheard conversation inAssassin's Creed: Revelations, theTemplars have in the past used brainwashed spies against the Assassins. Shaun Hastings suspects thatDesmond may be one after he killed Lucy while under the control of a Piece of Eden, but there are hints thatLucy herself could have been one.

Visual Novel

• InFate/stay night, askingIssei too much about Caster will trigger a bad end.

Webcomics

• Oasis fromSluggy Freelance.
• Unlike the common zombie-like revenants inGirl Genius, the revenants from Sturmhalten appear exactly like normal people (well, as normal as anyone in aPhil Foglio comic) until their controller issues them orders, which they carry out against their will. Interestingly, some are capable of freedom within those constraints. (Such as killing a friend so he won't suffer a Fate Worse than Death.)
  • Recently,Tarvek stated that the zombie revenants are actually only, "A statistical extreme," and that the sleeper agent revenants are actually far more common. It's just that, since the zombie revenants are far more obvious, they managed to divert attention from the real things.
• Gabriel (of Penny Arcade fame) is responsible for the murder of the president of the U.S.A in one comic after presumably having the instruction planted in him after going to a psychotherapist (or something).
• Mace Windu inDarths and Droids.

Web Original

• In theWhateley Universe, Team Kimba have worked out that Solange has created a Manchurian Agent among their friends. Theystill don't know who it is, but they're sure the agent has planted a blackmail note for Solange, and put a tracker in Fey's luggage.

Western Animation

• Haley in an episode ofAmerican Dad. The trigger phrase? "I'm getting fed up with this orgasm!"
  • Another episode had Steve react to a trigger that compelled him to assassinate a certain government official, as a throwaway gag.
• Using this, Sideshow Bob turnedBart Simpson into aLaser Guided Tykebomb in one episode ofThe Simpsons.

Bart:Time to blow up the clown. Homer: Go. Blow.

• Inspector Gadget did this once, with a game show that hypnotized its contestants (including the titular character) into reacting to the phrase "Going my way?" Turns out it did make him go their way...
• The brainwashing done by Dai Li inAvatar: The Last Airbender is activated by saying "(name), the Earth King has invited you to Lake Laogai." to which they respond by gainingMind Control Eyes and saying "I am honored to accept his invitation."
• The Adventures of Jimmy Neutron inMy Big Fat Spy Wedding, where Jet Fusion is hynotized to kill anyone who says "I have the Ring". The catch? Jimmy is the Best Man in the wedding of Jet Fusion and Beautiful Georgeous.Sheen and Carl discovers the trick, crash into the wedding to tell Jimmy, Jimmy orders to everybody in the church to say "I have the Ring" and Libby make up a song which its lyrics are "I have the Ring, yes I have the Ring, I have the Ring right here". Cue to a whole musical number which included DNA Production's Founders Keith Alcorn and John A. Davis dancing in the ChurchCrowning Moment of Funny? I think so.
• Mayor Adam West ofFamily Guy is a deep cover agent who is activated by the phrase "Boy, that Italian family in the next table sure is quiet." Also,Meg is revealed to be a deep cover agent as well.
  • Bonus points for doing this to a character whosevoice actress is fluent in Russian.
• Luna Fatale in the animated series ofSpirou and Fantasio.
• Often discussed inYoung Justice. Since Superboy is a clone from Cadmus, many were fearful that he's secretly programmed to spy and/or turn on the Justice League and their affiliates.Superboy is possibly a Manchurian Agent. Red Arrow is a sleeper agent.
• Archer: this trope is played with in season one finale "Dial M For Mother."
• InFuturama, Mom's company has a virtual monopoly on robot parts, and all robot parts she sells have control chips she can use to compel them to obey her; as a result, every robot on Earth has become a potential Manchurian Agent. Granted, she's only taken advantage of this in one episode, "Mother's Day".

• Trope
• Pages with Examples Needing Context
• Manchurian Agent
• Characters As Device
• Espionage Tropes
• Speculative Fiction Tropes
• Memory Tropes
• Mind Manipulation Tropes