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[[caption-width-right:300:"Close your eyes..."]]

->''"Sometimes death is the only mercy we have left."''
-->-- '''The Demon Hunter''', ''VideoGame/DiabloIII''

Something horrible has happened or is happening to Alice. Her pain is unbearable. Even her loved ones look away and cover their ears, trying to block out the sights and sounds of her agony. There is nothing they can do to ease her pain or save her. But they can offer one last mercy to their friend: they can end it all for her now, before it gets any worse.

Whatever is afflicting Alice is usually in the category of a FateWorseThanDeath (thus making the death [[DontFearTheReaper a kindness]]). There may be a BodyHorror that nobody can figure out how to destroy. Or ColdBloodedTorture has left her horribly maimed and screaming incoherently. Or perhaps she's about to succumb to TheVirus or TheCorruption, and she wants to [[DyingAsYourself Die As Herself]]. It may be that she could survive, but they have no access to medical care; or that Alice, if she lived, would be reduced to a shell of her former self. Whatever the reason, this trope implies that death is the merciful option, even if Alice is begging for her life (or is so overcome that she cannot speak at all).

InstantDeathBullet is likely, and justified in this situation: the killer has no difficulty getting to a position and attacking in a manner that would cause quick death. There is usually a moment when [[DyingAsYourself a glimmer of self-awareness]] allows Alice to show her gratitude through [[GoOutWithASmile a tearful smile]] or the like -- however implausibly. This is usually easier when the shooter is CradlingTheirKill.

When several people could do it, it is likely that [[HeterosexualLifePartners her closest]] [[PlatonicLifePartners friend]] will [[AFriendInNeed insist on being the one]] to give the fatal blow; compare DyingAlone.

TheMedic, even if holding to ThouShaltNotKill, may make an exception for these.

Note that in RealLife, [[http://en.wikipedia.org/wiki/Euthanasia euthanasia]] is ''extremely'' controversial. In either case, it is usually an ''incredible'' TearJerker.

Not to be confused with PutThemAllOutOfMyMisery.

Contrast CruelMercy, which aims to do the exact opposite. Compare the combat-ending CoupDeGrace, the villainous ThwartedCoupDeGrace, and the assisted-suicide ICannotSelfTerminate. A subtrope of ShootTheDog, whose [[Literature/OldYeller trope namer]] was a Mercy Kill.

!!'''As a DeathTrope, several if not all spoilers will be unmarked. You have been warned.'''

----
!!Examples:

[[foldercontrol]]

[[folder:Anime and Manga]]
* In ''Manga/DetectiveConan'', one case has the culprit Shimizu killed his girlfriend and partner in crime Oozawa because she took the blame of the crime they both committed by herself and he didn't want to see her in prison for the rest of her life.
* In the anime ''{{Hellsing}}'', when a person is turned into a zombie, there is no turning them back, so the Hellsing organization agrees that it's best to take them out quickly as a mercy kill.
* Averted in ''HunterXHunter'''s first Anime adaptation. Killua wants to mercy kill a bear cub that was mortally injured by a sniper, thinking that there's nothing they can do to for the baby, but when he's going straight for the kill Gon's aunt Mito [[TakingTheBullet extends her hand and blocks the lethal blow]]. She then convinces Killua to not do it, saying the cub hasn't given up on life, and Gon convinces Killua to heal the cub through Nen. They do; the baby is soon saved and returns to his family.
* ''Manga/FullmetalAlchemist'':
** NobleDemon Scar does this to Nina Tucker, whose father had transmuted both her and her dog Alexander into a pitiful chimera.
** In order to escape from Gluttony's stomach, Ed has to use some of the souls attached onto Envy in order to open the gate. One of them even thanks Ed for being put out of his misery.
* In ''VinlandSaga'' Askeladd tries as such for his fatally wounded friend Bjorn but he screws up the blow, missing the man's vitals. He rectifies this mistake shortly after a few last words between himself and Bjorn.
** After another failed assault on London, a viking is walking through the camp with the wounded, asking if anyone needs a finishing blow. One warrior in the picture is even calling over to him to take up his kind offer.
* In ''Anime/GareiZero'', Kagura kills her surrogate sister Yomi after the latter is possessed by a cursed stone.
* ''Anime/CodeGeass'':
** After Lelouch [[PowerIncontinence accidentally]] [[MindControl forces]] princess [[{{Pacifist}} Euphemia]] [[NiceJobBreakingItHero to go against everything she stood for]] and begin killing Japanese people [[BrainwashedAndCrazy under a geass]], he exits his mecha to deliver the killing shot personally.
** CC does this to Mao in an earlier episode after Mao had just been rendered unable to ever speak again, using the closest thing to an InstantDeathBullet ever seen in the series.
* It's a sign she's all grown up when ''WitchHunterRobin'' delivers a Mercy Kill to the witches being [[PoweredByAForsakenChild "processed"]] into [[PowerNullifier Orbo]].
* Killy destroying the eternal cloning machine and it's sole occupant in ''{{Blame}}'' could be viewed as a mercy kill.
* Routinely done in ''{{Claymore}}'' when a titular Claymore exceeds their Yoki limit and transforms into a Youma. They are then typically beheaded by another Claymore out of mercy while some of their humanity is still in tact.
* In ''Manga/KingOfThorn'', Ron decides to mercy kill the child Tim, believing there is no hope of rescue and that a quick death by bullet is better than being eaten by monsters or [[TakenForGranite petrified]] by Medusa. [[MamaBear Katherine]] isn't ready to give up hope, however, and just barely manages to prevent him from shooting the boy. Tim, asleep, doesn't even realize what almost happened.
* In ''Anime/NeonGenesisEvangelion'', Shinji effectively does this to Kaworu, who does not wish to survive and cause Third Impact. The manga makes this more explicit by revealing that should he survive the battle, SEELE will kill him anyway. He chooses to die by Shinji's hand rather than be murdered by his former handlers.
* HumongousMecha example: In ''{{Gundam 0083}}'', a Zeon soldier, disgusted at the sight of a Zaku painted white and used by the Federation, resolves to give it a "mercy killing".
* In the anime version of ''LinebarrelsOfIron'', KATO-KIKAN member Nakajima Soubi, after his defeat at the hands of [[TheHero Hayase Kouichi]], is revived by the real Big Bad and used as part of its invasion force of [[YouWillBeAssimilated hive-minded man-machines]]. In a final act of clarity, during the actual invasion of Earth, he asks his former teammates [[DyingAsYourself to put him down while he retains the lest vestiges of his consciousness]]. They comply.
* Towards the end of ''ChronoCrusade'', Fiore offers to do this for Satella after she's badly wounded in a battle with each other (the alternative being to leave her to be killed by the feral demons they're surrounded by). Satella TakesAThirdOption and uses her "jewel witch" powers to freeze them both in crystal.
* This is one way to view Light's death in ''Manga/DeathNote''.
** That's only in the anime. In the manga, it's made clear that Ryuk has gotten bored.
* At the end of ''Manga/BlackButler'''s CircusOfFear arc, Ciel orders the destruction of the villain's lair, including all the surviving children whose minds have been broken.
* At least Twice in ''HighSchoolOfTheDead''. The first time, Hisashi wasn't killed until after he turned (despite asking to be killed so he wouldn't), but the second time went over without a hitch.
* ''Anime/PuellaMagiMadokaMagica'':
** Kyouko sacrifices herself to kill Sayaka after Sayaka turns into a witch.
** In one of the attempts for Homura to SetRightWhatOnceWentWrong, she's forced to shoot Madoka before she can turn into a witch. Earlier that same timeline, Mami does this to Kyouko after [[GoMadFromTheRevelation realizing]] what's going to [[AFateWorseThanDeath happen]] [[TheCorruption to them]]. She was going to do this to Madoka, Homura, [[DrivenToSuicide and herself]] . The only reason she doesn't succeed is that Madoka does it to her first.
** Madoka does this ''in a world wide scale'' in the GrandFinale. Her wish says that she wants witches to not exist anymore, so she spreads her power all over the world helping magical girls in need. In the case of Magical Girls whose Soul Gems are completely corrupted so they're about to become Witches, she can't save their lives, but at least she can make sure they'll die painlessly and peacefully while their energy is collected to save the world. (This includes Sayaka, who can pass on in peace now.) And in a sense, she also does this ''to herself'': since she's destined to become the most powerful witch right after becoming a Puella Magi, Madoka ends up erasing herself outta existence when done, after a last talk with Homura.
* In the anime series spinoff of ''VideoGame/ArcTheLad'', the hero Elk encounters his long lost childhood friend, changed into a barely sentient womb for the terrible monsters the bad guys are using as mooks. He strangles her to end her suffering.
* The truth behind Takiko Ohkuda aka Genbu no Miko's death in the original FushigiYuugi. She was believed to be lethally ill, but her dad knew she was being devoured from the inside by Genbu ''on top of being lethally ill'', so to ease her suffer Mr. Ohkuda [[OffingTheOffspring killed her]] [[MurderSuicide and then himself.]] Note that the Takiko-centered manga FushigiYuugiGenbuKaiden is still unfinished, so it ''might'' retcon this. (As of now, the lethally-ill-but-still-not-devoured Takiko is using her last days to fight for the cause of Genbu before she kicks it.)
* Attempted in ''RosarioToVampire'', where Tsukune became a ghoul. Thankfully, Moka was stopped before she could land the finisher.
* In ''SpeedGrapher'', Suitengu did this to his little sister, Yui, after discovering that years of abuse and degradation in a brothel had destroyed her mind.
* In Anime/MobileSuitGundamWingEndlessWaltz, Heero offers this to the critically injuried [[spoiler:Mariemaia]] after the final battle. When he pulls the trigger, [[spoiler:it is revealed that he is out of ammo.]]
* In the last episode of ''Literature/FromTheNewWorld'', [[spoiler: Saki does this to Squeala/Yakomaru after he's sentenced to a FateWorseThanDeath and she realizes he is technically human]].
* At the end of ''Manga/ElfenLied'':
--> [[spoiler: [[TearJerker Kouta: And then, I killed Nyuu.]] ]]
* Certainly Tsunayoshi viewed her death at the hands of [[spoiler: Yoshiyasu]] as this in ''{{Ooku}}: The Inner Chambers'': she had long believed that she became TheWrongfulHeirToTheThrone and would welcome someone to kill her. It's unclear though if [[spoiler: Yoshiyasu]] killed her to fulfill this trope or if [[WomanScorned another trope]] motivated her murder.
* This happens to [[spoiler:Hige]] in ''WolfsRain''.
[[/folder]]

[[folder:Comic Books]]
* In ComicBook/OneHundredBullets, Wylie Times does this to Gabe, a dimunative, ugly ButtMonkey, who only has his uncanny talent at playing the trumpet going for him. Gabe's jaw had been destroyed by a bear trap while running away from a gunfight, putting an end to his musical prospects.
* When {{X-23}} was a child, her handlers gave her a puppy to kill. After an hour, she hadn't killed it. They said they would kill it in the most painful way possible and make her watch unless she mercy killed it.
* Subverted in ''{{Preacher}}'', where Jesse Custer, in his final confrontation with the Meat Man (who is making out with a woman made of raw meat), says that he has seen many fucked up-things in his life: "If this is not a mercy killing, then I do not know what is."
** The Meat Man was also already painfully dying after being struck by lightning.
* In ''ComicBook/{{Elfquest}}'', Skywise ends his mortally-wounded wolf's suffering after its throat is torn open by another wolf.
* In the JusticeLeagueOfAmerica, the second [[HollywoodCyborg Commander Steel]], Henry Heywood III, has most of his flesh burned away by an android built by [[MadScientist Professor Ivo]]. His grandfather, the original Commander Steel, puts him on life support but euthanizes him after recognizing that he will never wake up.
* Occurs in ''ComicBook/StrikeforceMorituri'' where the heroes find four people who were secretly subjected to the Morituri Effect and were accidentally turned into super-powered deformed monsters. The "mutants" were euthanized at their request.
* After tagalong nobody Ugly John is mortally wounded by a Sentinel, ComicBook/{{Cyclops}} puts him out of his misery - at {{Wolverine}}'s insistence.
* In ''ComicBook/UltimateXMen'', {{Wolverine}} does this for Jesse. There are other factors at work, including [[spoiler:the fact that the U.S. government had sent Wolverine to do this and]] how bad the truth would be for the mutant community, but it's presented as sparing a boy from a FateWorseThanDeath.
* In ''AHistoryOfViolence'', the protagonist Joey finds his childhood friend Richie in the hands of the mob that they'd attacked and ripped off decades earlier. Richie had been caught early on and tortured the entire time. When Joey finds him, he is barely recognizable as human. Richie pleads for death, and Joey hesitantly grants it.
* Questionably occurs near the end of ThePunisher comic ''Man of Stone''. Frank Castle comes across the paralyzed body of the Russian General Zakharov, who had been left to die in the blazing Afghanistan desert by a SmugSnake. Castle would have killed him regardless, but as Zakharov tells him to get on with it by saying the day was growing hotter, it arguably still fits this trope.
* The World War II comic ''SgtRock'' had an interesting variant on this: One of the Easy Company soldiers is trapped in a burning burn after a skirmish, screaming for someone to put him out of his misery. The sergeant and other men hesitate over what to do, before the barn collapses into a ball of flame, along with the man's dying screams, and [[spoiler: his soul is snatched up by the Devil. Seems he'd made a DealWithTheDevil that he'd never die by gunfire...]]
* Comicbook/DoctorStrange was forced to kill his own mentor, the Ancient One, to prevent [[EldritchAbomination Shuma-Gorath]] from using his mind as a conduit to enter their world. Said mentor was dying anyway, and after death he [[AscendToAHigherPlaneOfExistence became one with Eternity]], sticking around as a spirit adviser to Strange (who was understandably upset over [[ShootTheDog what he'd had to do]]).
* In ''ComicBook/TheSandman'', Morpheus' son Orpheus was torn apart by the Maenads and reduced to an OracularHead. He begged his father to kill him, but Morpheus (who was a pretty cold-hearted jerk in the past, even more so than in the present) refused since he was offended that Orpheus had ignored his advice to let go of Eurydice. Two and a half thousand years later, Morpheus and Orpheus reconciled, and Morpheus finally gave Orpheus the death he wanted. This Mercy Kill dooms Morpheus, since killing his own son made him a viable target for the Furies. That, and he ''wanted'' to be punished for what he had done to Orpheus.
* In the first story arc from the anthology series ''Marvel Fanfare'', after being transformed into the Man-Spider Spider-Man begs Kazaar to kill to him [[DyingAsYourself while he still has some of his mind left]]. Kazaar complies, but in the end it's averted as Karl Lykos absorbs the mutated energy from him and turns him back to normal.
* Amanda Waller does this to Duren after he is mutated by Regulus's bomb in ''SuicideSquad'' #0. It was this act that made her determined that any future special ops team she commanded would be composed of disposable operatives.
* ''ComicBook/RedHoodAndTheOutlaws'': The Talon in the ''Comicbook/NightOfTheOwls'' tie-in asks this of Jason.
* Sideswipe does this to captured, tortured, and mutilated human companion, Hunter O'Nion at the end of ''Comicbook/TransformersAllHailMegatron''.
[[/folder]]

[[folder:Fan Fiction]]
* In Chapter Seventeen of ''FanFic/TiberiumWars'', Brother-Captain Alvarez of the Black Hand is torn between engaging in a LastStand to evacuate a small number of wounded troops, or saving his men by ordering a retreat and leaving the wounded to be captured by GDI, who he believes will torture and kill them. He instead [[TakeAThirdOption chooses a third option:]] executing his own wounded to keep them out of GDI hands.
* A TearJerker moment in ''FanFic/AeonNatumEngel'': Two persons consider doing this to their dying 5-year old half-sister, neither of them is able do it, and break down in tears.
* Happens to Brock and Ash during the course of ''[[http://www.fanfiction.net/s/5362357/1/Carnage_Necropolis Carnage Necropolis]]'', after they're [[TheVirus infected]].
* ''FanFic/NightOfTheShy'': Birostris Oswaft, the [[LastOfHisKind last of the Sand Mantas]], begs Twilight to do this to him, as he wants nothing more than to [[WhoWantsToLiveForever join the rest of his people in death.]]
* The ''FanFic/PonyPOVSeries'': This comes up during the FinalBattle with Princess Gaia/[[spoiler: Nightmare Whisper]]. Both Rarity and Rainbow Dash decide they have to kill her, not out of hate, but because [[spoiler: they both figure Fluttershy would rather die than see [[SuperpoweredEvilSide what she's become]]]].
** During the [[BadFuture Epilogue/Dark World]] timeline, Apple Bloom apparently ended up subjected to the same curse as [[VideoGame/StoryOfTheBlanks Sunny Town]]. After eventually helping the entire town free themselves from the curse and move on, she begs Liarjack to do the same for her so she can be with her family; reluctantly, LJ agrees, and Apple Bloom dies.
** This rationale is how his allies comfort Shining Armor for having killed [[spoiler: one of [[BigBad Makarov]]'s Alicorn cyborg CoDragons]], by pointing out that the poor soul was in a [[AndIMustScream living hell]].
* ''FanFic/TheFallOfTheFireEmpire'': When Ozai descended into senile madness, Azula smothered him with a pillow. [[EvilChancellor Qing Xi]] describes it as the only merciful act of her life.
* ''FanFic/ThePowersOfHarmony'': After [[TheDragon Eclipse]] fatally poisons him, condemning him to a slow and painful death, [[spoiler: Strauss]] requests that [[NeverMessWithGranny Granny Smith]] put him out of his misery. She reluctantly complies.
* In CheerileesGarden, after Cheerilee submerges [[spoiler: Pinkie Pie]] into a container full boiling hot water, she convinces [[spoiler: Rainbow Dash]] that it would be better to put her out of her misery rather than to let her go on living.
* Discussed in the ''{{Berserk}}'' fanfic "[[http://www.fanfiction.net/s/5481820/1/The-Entire-World-is-a-Battlefield The Entire World is a Battlefield]]" when Guts is met by a spectre of pre-Eclipse Casca. While the real Casca is not dead, [[GoMadFromTheRevelation she is mentally gone]], and Guts wonders if the current Casca is better off dead [[FateWorseThanDeath after what she experienced.]]
* ''The Fall of Cleveland'' has Marshall find a ''hideously'' tortured fluffy pony in the chapter "The Facility". It begs for help, but it's so horribly maimed that Marshall can't think of a way to help it. So he does the only thing he can and breaks its neck. The fluffy's last word is "Ffffffffffannnnnnkkkkkkkk..." (Fluffies can't pronounce "th" sounds.)
* Mammoth does this for Plasmius/Otto von Furth in ''[[https://www.fanfiction.net/s/9051372/10/Consequence-of-Misunderstandings Consequence of Misunderstandings]]'' after [[BigBad Slade]] makes it impossible for him to sleep (and thus stay human). Gizmo mentions that while Raven's healing powers do prevent most of them, the team has had to perform mercy kills before.
* In ''FanFic/ConstantTemptation'' Light [[ShootTheDog does this for his father]], he writes his name in the Death Note after his father has been kidnapped and tortured to breaking by Beyond Birthday before Beyond was finished hacking ''[[ToThePain pieces]]'' off of him.
[[/folder]]

[[folder:Film]]
* Classic example: ''OneFlewOverTheCuckoosNest'', when Chief Bromden smothers [=McMurphy=] with a pillow after the latter is lobotomized.
* NathanFillion is no stranger to the Mercy Kill. In ''Film/{{Slither}}'', he doesn't hesitate in delivering a headshot to a friend whom the mutated Rooker-beast has infected.
** In ''Film/{{Serenity}}'', Mal shoots a man he had pushed off his hover-jeep who then gets dragged away by [[AlwaysChaoticEvil Reavers]]. Later, Zoe acknowledges it: "That was a piece of mercy."
*** Also attempted (as seen on tape) by a woman on herself as the Reavers are breaking in. She fails. The tape continues to record.
** In the same film (minutes after the Mercy Kill described above), Jayne gets skewered in the leg by the Reavers, and is hanging off the back of the mule, prompting him to make Mal promise to shoot him if the Reavers take him. Mal quickly takes aim, prompting Jayne to shout, "Don't shoot me ''first''!" before Mal shoots through the rope tying him to the Reaver ship instead.
* Tragically used at the end of Creator/DavidCronenberg's ''TheFly''. The only thing Brundlefly can do is crawl miserably along the floor and point the end of the heroine's gun at its own head.
** The hero of ''[[TheFly Fly II]]'' had no choice but to mercy kill a poor dog. Why? The condition of the dog was a result of an experiment that turned the dog inside out, thus deforming it both physically and psychologically.
* In the film ''Film/StarshipTroopers'', Lieutenant Rasczak shoots one of his men who is badly wounded and captured. He then tells his troops that he expects them to do the same for him if it is ever necessary. It is.
** In the book when a man who went AWOL during basic training murdered a little girl and the rest of the recruits had to go and make sure he was hanged, because he was their man right or wrong. Rico begins to think whether or not they should try to cure him of his insanity, in his mind one would have to be crazy to kill a child for no reason, but then decided that living with the knowledge of what he [[FateWorseThanDeath did would be worse than death]]. So he kinda views hanging the guy as a mercy killing, or at least mercy for every other little girl he might have come in contact with.
* Coupled with FridgeBrilliance in ''Film/{{Cleopatra}}''. One of Cleopatra's ladies-in-waiting serves her a poisoned drink and begs for forgiveness. Cleopatra says "I forgive you" and orders her to drink the poison. It's a Mercy Kill because being poisoned is likely to be a much more quick and effective death compared to what the servant might have gotten as punishment for trying to assassinate the Queen.
* This appears frequently in the ''Franchise/{{Alien}}'' franchise, often by victims of facehuggers, although in a deleted scene from ''Film/{{Alien}}'' Ripley finds her crewmates (who have all been attacked and either killed or dragged off by the titular alien) cocooned to the walls of its lair and the line is uttered as a request for euthanasia rather than to prevent the alien from reproducing.
* In ''Film/StarTrekFirstContact'', when the Borg start assimilating crew members, it's Picard who takes it upon himself to vaporize, Tommy gun, or otherwise euthanize every affected crew member he can, because he knows what it's like. Of course, when he got turned, they certainly had to save him. Picard believed that the only reason it was possible for him to be rescued at all was because the Borg Collective deliberately left him some degree of autonomy, to act as an interlocutor, while he saw the redshirts as being unsavable.
-->'''Picard''': There was no way to save him!
-->'''Lily''': You didn't even ''try!''
* In the [[Film/StarTrekVTheFinalFrontier fifth Star Trek film]], Bones relives one of his most painful moments, where his father is dying and suffering from an incurable disease. He begs Bones to stop treatment so that he can finally die. Bones does so, and the very next day a cure for his father's disease was discovered.
* Averted in ''Franchise/StarWars: Film/RevengeOfTheSith'', when Obi-Wan leaves Anakin's mangled, triple-amputated, horrifically burnt body on [[LethalLavaLand Mustafar]]. Killing him would've been a mercy at that point, [[DoomedByCanon though we know that, logically, that could never happen]]. [[Literature/RevengeOfTheSith The novelization]] makes his thought process on why he doesn't do it explicit.
-->He was not feeling merciful. He was feeling calm, and clear, and he knew that to climb down black beach might cost him more time than he had. Another Sith Lord approached....In the end, he was still Obi-Wan Kenobi, and he was still a Jedi, and he would not murder a helpless man. He would leave it to the will of the Force.
* DoubleSubversion in the first ''Film/ResidentEvil'' movie. Rain gets infected by the zombie virus and tries to get the rest of the group to kill her before she turns, but they refuse and try to find a cure. Later on she becomes a zombie anyway and has to be killed.
* ''Film/TheLastOfTheMohicans'': Hawkeye gives one to [[spoiler:Heyward]] towards the end.
* ''TheSandPebbles'': Holman shoots Po-han to spare him being tortured to death.
* According to the director, Harry Lime's death in ''Film/TheThirdMan'' is one of these.
* BJ does this to Tucker in the ''Film/DawnOfTheDead2004'' remake.
* An unusual modern film usage features at the climax of ''Film/QuantumOfSolace'' when Bond prepares to shoot Camille, as they are trapped in a burning building and she is reliving her childhood trauma of being trapped in a burning house. Subverted when he finds a way of escaping their situation.
* Neil in ''Film/{{Heat}}'' mercy kills one of his partners in crime after the guy has been tortured and is dying.
* In ''Film/FullMetalJacket'' when the sniper girl has been shot and is begging the soldiers to shoot her again.
* ''PansLabyrinth'': the army's [[TheMedic doctor]], who is supposed to heal a captured [[LaResistance rebel]] for another [[ColdBloodedTorture torture session]], kills him instead.
* In ''Film/TheDescent'' Sarah finds Beth with an open wound in her throat (caused by an ice-pick) and ends her pain by smashing her head with a rock rather than leaving her to the Crawlers. She is understandably reluctant to kill her friend, but tearfully relents after Beth begs her to do it.
* Averted in ''Film/ReturnOfTheLivingDead'', when two survivors are cornered in an attic. Knowing these zombies can't be killed by bullets, the male survivor covertly aims his pistol at the back of his teenage companion's head, rather than let her be eaten alive by her own undead boyfriend. Averted because the place gets nuked before he can pull the trigger.
* Parodied in ''FunnyPeople'', when Creator/AdamSandler's character tells Seth Rogen's, who is working for him at the time, that he has an almost certainly fatal disease and asks him to shoot him, for a fee. When Rogen replies that he needs time to think about it, Sandler replies that he was just kidding and that Rogen is sick for even considering it. He DOES still have the deadly disease, though, so that part wasn't a joke.
** Chevy Chase is offered a similar deal in ''Fletch'', [[spoiler: although the man who requests it doesn't really have bone cancer and is trying to use Chevy as an UnwittingPawn.]]
* In ''Film/SavingPrivateRyan'', they give TheMedic an overdose of his own morphine because he cannot survive his wounds. Inverted earlier in the movie, when an unnamed soldier orders the others ''not'' to mercy kill Germans who have been doused in flames.
-->'''Soldier''': Don't shoot! Let them burn!
* In ''Film/{{Saw}} III'', Amanda does this to Adam as shown in a flashback. Adam was left in the bathroom to die at the end of the first movie, and Amanda, unable to detach herself emotionally like Jigsaw does, suffocates Adam with a plastic bag so he dies quickly instead of starvation or disease.
** It may have been more guilt on Amanda's part. In the flashback where she and Jigsaw are setting up the bathroom trap, it shows she failed to secure the key that would have freed Adam properly (Jigsaw told her to tie it around his ankle - she just placed it in the tub and it wound up going down the drain). If she had done what Jigsaw told her, Adam would have survived.
* The French film I've Loved You So Long is about a woman who was sent to prison for murdering her son. In the end it is revealed that he had terminal cancer, and he got so sick and in pain that she killed him out of mercy, after spending one last day with him doing everything he loved.
* In the ''Film/TheTexasChainsawMassacre2003'' remake Erin comes across a dying Andy in Leatherface's "workshop" she puts him out of his misery by stabbing him with a knife.
* Nonhuman case in ''Film/IAmLegend'': After Neville's dog Sam is infected with the vampire virus, Neville chokes her to death. Borderline in that it's also self preservation, because Sam is already becoming hostile.
* In ''Film/BladeII'', one of the Blood Pack is bitten by a Reaper, and is quickly mutating into one of them. The others demand he be put out of his misery, so he's shot twice in the chest. However, he's mutated far enough that the silver bullets won't do the trick. Then a guy cuts half his head off, which also fails. Blade finally shoots a hole in the ceiling so sunlight will do the job.
* Frank from ''Film/TheRockyHorrorPictureShow'' tries to brush off his murder of Eddie as a mercy killing. The [[AudienceParticipation audience]] may feel free to call him on this.
* Done multiple times in ''Film/TheWildGeese'' - the mercenaries don't have the time or resources to carry their incapacitated comrades, lest the Simbas arrive and overrun the whole company; given the Simbas' notorious reputation for brutality and butchery, a shot to the head is kinder than being captured.
* In ''Ring0Birthday'', when Akiko and Etsuko are cornered by Sadako with no chance of escape, Akiko shoots Etsuko through the head [[BetterToDieThanBeKilled before turning the gun on herself]].
* In ''Film/LandOfTheDead'', the protagonist shoots a woman who's being bitten in the neck by a zombie right between the eyes to spare her either being eaten alive or reanimating as a zombie.
* In ''Film/BlackDeath'', [[spoiler: Wolfstan]] gives one to [[spoiler: Griff when he reveals that he's got the plague]]. Characters also discuss the use of misericorde at the battlefield.
** Osmund does this to his lover Averill when he finds her insane and suffering. It is later revealed by [[spoiler: Langiva that Averill's appearance of insanity was merely a temporary effect caused by drugs, rather than the result of being unnaturally brought back to life. This [[DespairEventHorizon pushes Osmund over the edge]]]].
* In the film adaptation of ''The Whisperer In Darkness'', Professor Wilmarth encounters the disembodied brain of Henry Akeley, who asks him to do this. In a subversion, Wilmarth cannot bring himself to carry out the request.
* Happens in the horror film ''Film/{{Train}}''. Alex and Willy find their friends Sheldon and Todd locked in a torture car, both horribly mutilated. Sheldon can still walk, but Todd is barely alive, [[EyeScream missing his eyes]] and unable to move. He begs his girlfriend Alex to finish him. When she tearfully refuses, Sheldon does it, cutting him with an axe.
* In ''Film/SkyCaptainAndTheWorldOfTomorrow'', the protagonists come across Shangri-La in the Himalayas, but find out that it has been taken over by [[BigBad Totenkopf]], and its inhabitants used as slaves and test subjects in the irradiated mines. They find this out from the last survivor of Totenkopf's experiments, a disfigured old man who asks but one question for all his answers: "Kill Me." It is unknown if they fulfilled his wish.
* Logan, to an injured grizzly bear in ''Film/TheWolverine''.
* In the German Holocaust drama ''Film/DerLetzteZug'', a severely dehydrated Erika Friedlich stops lactating, and [[OffingTheOffspring suffocates her baby son]] rather than allow him to slowly starve to death.
* Played for laughs in ''Film/BlackDynamite'', when the titular characters asks a friend who has consumed tainted malt liquor that [[BiggerIsBetterInBed shrinks a man's genitalia]] whether he wants to keep living. The friend says no. BoomHeadshot.
[[/folder]]

[[folder:Literature]]
* Used disturbingly in ''Literature/{{Animorphs}}''.
* The last verse of Kipling's poem "Literature/TheYoungBritishSoldier."
* Literary/film example: ''Literature/OldYeller'' is a [[ItWasHisSled classic example]]. Due to an earlier fight with a wolf, the dog develops rabies and has to be [[ShootTheDog put down]].
* In ''Literature/OfMiceAndMen'', a dog is shot for being too old and 'no use to anyone'.
** And later, Lennie is shot in the head just like the dog by George, because George considers that the fate that would await him at the hands of the other farmhands would be worse, and also because Lenny was basically too dangerous for society. TheFilmOfTheBook makes it seem less like a Mercy Kill and more like a I'm Fed Up With You kill.
* The above entry also applies to ''The Wars'', only with a horse instead of a dog and the man was shot for refusing to help when he should have. [[TrueArtIsIncomprehensible Or something.]]
* In the second ''Series/{{Dexter}}'' book, on encountering a "yodeling potato" (a truly horrific FateWorseThanDeath), Doakes tries to shoot him. His fellow cops stop him.
** This is one of very few instances in which Dexter and Doakes agree on something. Dexter considers Doakes's solution quite reasonable given the circumstances.
** Has one moment in the series too, see Live Action tab.
* In Creator/AndreNorton's ''Star Guard'', every Terran soldier carries a special dagger whose sole purpose is to "give Grace" to a direly wounded comrade. The main character uses it ... at the specific request of a severely burned man. Norton's books are often described as "juvenile fiction," apparently by people who didn't read scenes like this one.
* At the climax of ''[[Literature/{{Deryni}} High Deryni]]'', this resolves the four-on-four duel arcane between Torenth and Gwynedd. After Stefan Coram reveals he's poisoned Wencit and his colleagues with an incurable and slow-acting toxin, Kelson is advised this is a good idea. Bishop Arilan claims to recognize the substance Coram took to speed his own death, and it's said that the others will take at least a day to die. Also, the terms of the duel will keep all of them there in the circle until all of one side are dead. Wencit himself asks for death. Morgan offers to do it, but Kelson insists on doing it himself and all but commands Morgan to show him the means: the same spell Charissa used to murder King Brion months earlier.
* Whenever a wounded soldier asks for mercy in ''Literature/ASongOfIceAndFire'', they're usually referring to this kind of mercy.
** Sandor Clegane comes to mind as a frequent dispenser of such mercy, and helpfully teaches little Arya where the heart is so that she can do it, too. Ultimately, he, wounded and feverish, ends up begging mercy of ''her''. She refuses, saying that he doesn't deserve it.
** Lord Manderly identifies the death of Little Walder as one of these. Because, had he lived, he would have grown up to be part of [[TheOathbreaker House Frey.]]
** Joffrey Baratheon sent an assassin armed with a Valyrian steel dagger to kill Bran Stark after he is left crippled and in a coma. Joffrey overheard his father Robert make an off-hand remark that living as a comatose cripple is a fate worse than death. Joffrey being a somewhat twisted WellDoneSonGuy arranged the "mercy kill" hoping to follow his father's example.
** Daenerys Targaryen smothers her brain-dead but still alive husband Drogo [[VorpalPillow with a pillow]].
** In a variation, Ned Stark kills Lady personally because she is "of the North" and deserves better than a hired headsman who sees it as just another duty.
* In the ''Literature/{{Nightside}}'' books, John Taylor is forced to kill his friend Razor Eddie in a possible future, because Eddie - as an immortal - is suffering through being used as an insect incubator. [[FateWorseThanDeath Over and over again]], since the insects, the last surviving things on a ruined Earth, [[FaceFullOfAlienWingWong lay eggs in his flesh]]. Then the larvae hatch and ''eat their way out''. Then they lay eggs in him again. The cycle has been repeated for [[spoiler: eighty-three years.]]
** Also in the Nightside series, Suzie Shooter invokes this trope for a woman who's in the process -- the ''slow'' process -- of being eaten piece by piece by demons.
* In the ''Hawk & Fisher'' series, the titular cops use a magic-nullifying stone to end the anguish of several still-conscious dissection specimens, human and animal, in an evil sorcerer's house.
* In ''Literature/TheSharingKnife'' series by LoisMcMasterBujold, dying Lakewalkers are supposed to be killed by other Lakewalkers with special knives made from Lakewalker bones because that is the only way to create the magic knife needed to kill a [[TheVirus malice]]. This is more like a HeroicSacrifice in practice, as the killed Lakewalker is usually aware and willing to die for the cause.
** Also, after a malice is killed, the mud men {animals twisted into human-like forms} revert to their animal minds, but are still trapped in their twisted bodies which they don't know how to use, so it's best for them to be put out of their misery to save them a more lingering death.
** Averted, however, in Bujold's ''[[Literature/VorkosiganSaga Shards of Honor]]'', where Cordelia refuses to allow Aral to mercy-kill one of her junior officers who is horribly and irreversibly brain-damaged. He is much confused, as this is standard procedure for his military and they're in a desperate situation even without the soldier as a liability. In a much later book, she apologizes to the ensign's memory; it's ambiguous whether this is because she feels she made the wrong decision or because [[spoiler: she can't bring herself to do the same for Aral]].
* Several examples from Discworld, in keeping with PTerry's views on the matter:
** ''[[Discworld/NightWatch Just in case, and without any feeling of guilt, Vimes removed his knife, and... gave what help he could]].''
** In ''Discworld/WitchesAbroad'', a wolf unable to bear living any longer as a BigBadWolf begs Granny Weatherwax for "an ending, now". She deputises the job to the conveniently available woodcutter and the wolf gets what it wanted. [[DueToTheDead She then insists on burial.]]
** In ''Discworld/TheFifthElephant'', Angua makes Carrot promise to hunt her down if she should ever turn into a monster like her brother Wolfgang. The fact that it'd be ''Carrot'' doing it is what makes it a Mercy Kill, as he's shown when he has to do it, he does it as a "good" man would: swiftly and surely.
** In ''Discworld/CarpeJugulum'', the issue is played with: Granny Weatherwax insists Oats should kill her if it turns out necessary, though it's not Mercy Kill so much as "defend my friends for me."
* In Creator/DanAbnett's ''Literature/GauntsGhosts'' novel ''Only In Death'', Mkoll finds mutilated victims of the Blood Pact and {{Mercy Kill}}s them. One is explicitly described as recognizing it and being grateful; Mkoll feels like a priest bestowing a final blessing. (Until [[spoiler: he finds Gaunt. [[AMillionIsAStatistic Him, he saves alive]].]])
** In ''Ghostmaker'', when a shuttle crash-landed in wilderness and two troopers are injured, Rawne says they should be "merciful." Gaunt refuses. Fortunately, rather than put four troopers to carrying them, they have [[BigGuy Bragg]] carry them both. In the same novel, a soldier is impaled by debris from his vehicle and his teammate has to shoot him.
** In ''Straight Silver'', uninjured soldiers are screaming in agony because their psionically linked mounts are dead; the troops who come to rescue them end up mercy killing them.
** In ''Traitor General'', when it appears Feygor will not recover and carrying him costs them too much, Rawne attacks Gaunt, thinking he intends to leave him behind; Gaunt assures him that he always intended to be merciful. When Ezsrah's attempt to treat him causes Feygor to go into a frenzy, Rawne stops Gaunt on the grounds that he would do it himself; [[spoiler: fortunately, when Rawne approaches with drawn gun, Feygor asks, coherently, what it is for]].
* In Creator/DanAbnett's ''Xenos'', Literature/{{Eisenhorn}} is running through a building full of people being prematurely roused from cryogenic sleep and dying. He explicitly says that he could have mercy killed one of them, but did not in order to prevent even more suffering - if he had, the [[ObstructiveBureaucrat local authorities]] would have buried him in inquiries and court cases for years while the BigBad roamed free. He assures us he suffers BadDreams as a consequence.
* In Creator/DanAbnett's ''TabletopGame/{{Warhammer 40000}}'' Literature/HorusHeresy novel ''Horus Rising'', when Space Marines are invading a church to put down insurgants, one dying man begs Lokun for a blessing because the otherworld will shun him without it. Having OutgrownSuchSillySuperstitions Loken refuses, and when the man asks for help again, kills him, regarding it as mercy.
** In JamesSwallow's ''The Flight of the Eisenstein'', Voyen says they should give it to Decius. Garro [[DividedWeFall bitterly accuses him]] of wanting to destroyed the evidence of what the lodge (which he belonged to) had done.
* In GrahamMcNeill's TabletopGame/{{Warhammer 40000}} Literature/{{Ultramarines}} novel ''Dead Sky Black Sun'', when Uriel and Pasanius want to rescue some captives, the renegade SpaceMarine Vaanes shows them the prisoners and explains that freeing them would be pointless and death a mercy. They do not actually kill them but leave them to certain death. On the other hand, this [[{{Foreshadowing}} foreshadows]] Vaanes's willingness to [[NoOneGetsLeftBehind leave people behind]]. Later, Uriel looks at a Chaos fortress they destroyed and sees that all the victims of their experiments have been granted the Emperor's peace.
** In ''The Killing Grounds'', when the Lord of the Unfleshed was the only survivor of being possessed with the souls of the dead, and that with dreadful wounds, Uriel [[DyingAlone stays with him]] while he weeps, reassures him, and kills him quickly.
* In Jo Graham's ''Black Ships'', the narrator is forbidden from seeing blood shed. Nonetheless, when she and her companion Xandros come across a man whose insides are... not so inside anymore, she gives Xandros the go ahead, and he slits the man's throat.
* In Creator/DianaWynneJones's ''Literature/{{Hexwood}}'', Mordion has a very nasty example in his backstory--he's forced to kill his only remaining sibling, who's been horribly tortured, to spare her further pain. The torturer then informs Mordion then if he ever shows any reluctance in his job as assassin, the same thing will be done to his target; in a sense, everyone he kills from then on is a preemptive Mercy Killing.
* In Creator/StephenKing's ''Literature/NeedfulThings'', Ace Merrill does this to his partner, "Buster" Keeton, after he's shot in the stomach.
* A variation occurs in various swashbuckling novels--Sir Creator/ArthurConanDoyle's ''The Refugees'' for instance--the hero and heroine find themselves facing a FateWorseThanDeath from which the heroine requests the hero to save her by shooting her (usually TheCavalry arrive just in time to prevent this). Usually takes place ''before'' the FateWorseThanDeath can occur and while the suicidee is still undamaged. Not ICannotSelfTerminate as the emphasis is on dying by the hand of someone who loves you rather than being functionally unable to do it oneself.
* In ''[[Literature/DragonridersOfPern Dragonseye]]'', part of the preparation for the return of Threadfall is a medical conference on treating Thread injuries. Some of the medics get into a discussion on the ethics of giving "mercy" to a Thread-injured patient.
** Previously, in ''Dragonsdawn,'' the first generation of Pern settlers (some of whom are war veterans) wind up giving "mercy" to Thread victims. One old soldier reflects "he had given mercy several times, too many times."
* In Literature/PCHodgell's ''Literature/ChroniclesOfTheKencyrath'', Kencyr Lords and officers have a duty to walk the battlefield and cull the wounded, identifying those who should survive with [[HealingFactor ''dwar'' sleep]] and medical care and those who will die; if the latter cannot end their own lives, it is their duty to use a suicide dagger to dispatch them. Lords in particular feel a compulsion to aid those who are bound to them who are in distress.
* A variation occurs in ''Literature/TheThinRedLine'', where a sergeant delivers morphine to a mortally wounded soldier so that the latter can overdose on it.
* In Earle Birney's poem "David", a mountain climber is injured badly, and is pushed off a cliff by his friend.
* A particularly horrid (and ultimately futile) version takes place in the Creatore/AmbroseBierce story [[http://www.online-literature.com/bierce/1990/ "The Coup de Grace".]]
* E.C. Tubbs's Earl Dumarest had to do this more than once in the series. In one book, a man was taken by giant spiders which laid eggs in his flesh. Dumarest went into the spiders' nest to find him, and the narrative states, "There was no cure and only one mercy. Dumarest administered it..." Another character commented that the dead man was lucky because "'Sometimes that's what a friend is for--and he had one of the best.'"
* In the first book of Creator/JimButcher's ''Literature/CodexAlera'', ''Furies of Calderon'', Fidelias does this. He snaps the neck of a girl that was going to be eaten alive by the Marat he and his cohorts were allied with.
* In Creator/HPLovecraft's "The Colour Out of Space", a visitor to the blighted farm finds the ruined, half-disintegrated remains of Nahum's wife dying in the house. When he exits, nothing living is left behind him, and the narrative state that it would've been an atrocity to leave her alive.
* In Creator/JRRTolkien's ''Literature/TheSilmarillion'', Fingon almost kills his cousin Maedhros, who is [[ICannotSelfTerminate being tortured by hanging from a cliff and is out of reach]]; but at the last moment he is [[DivineIntervention given a way]] to reach his cousin...who cannot be freed and again begs to be killed. Then Fingon [[LifeOrLimbDecision has another idea.]]
* In ''White Wing'' by Gordon Kendall, the eponymous fighter squadron is pretty much all that's left of the human race after [[EarthShatteringKaboom Earth is destroyed.]] The other species [[FantasticRacism don't like them much]], especially the "barbaric" custom where a badly wounded pilot requests "the Mercy of the Wing" - the other fighters form up and solemnly blast him and his ship to atoms. Public opinion does change a bit by the end of the book, when two facts have come to light: [[HumansAreSpecial humans are immune]] to the enemy's {{Brainwash}}ing, and Earth was actually destroyed not by alien invaders but ''by humanity'', in a DefensiveFeintTrap that invoked the same principle of "Mercy" on a much larger scale.
* At the end of ''[[Literature/{{Animorphs}} The Return]]'' David begs Rachel to do this for him rather than force him to [[FateWorseThanDeath live out the rest of his life as a rat]]. The book ends with Rachel crying in front of David, and whether or not she killed him is never revealed.
* In ''Literature/HarryPotterAndTheHalfBloodPrince'', Snape kills Dumbledore. Next book, it's revealed that Dumbledore asked Snape to kill him, revealing that moment in ''Half-blood Prince'' to be euthanasia instead of crossing the MoralEventHorizon.
** Moreover, Dumbledore asked Snape to kill him under such circumstances that it would cement Voldemort's trust in him ''and'' save Draco, making this a ThanatosGambit as well.
** Dumbledore states that his dying makes things much easier, suggesting that his death was the plan all along.
* A recurring theme in ''Literature/TheGargoyle'': Francesco asks his brother to do this for him when he is dying of the plague that killed his wife, by shooting an arrow made from their wedding rings into his heart. Later, the 13th-century version of Marianne does this for her husband when he is being slowly tortured to death.
* In Creator/PeterFHamilton's ''Literature/CommonwealthSaga'', Bruce, the Starflyer Assassin, has a brief [[DyingAsYourself moment of clarity]] where he asks Gore to Mercy Kill him.
-->[[spoiler:'''Bruce''']]: Do it. Kill the alien.
-->'''Gore''': Good for you, son.
* In ''Literature/TheDresdenFiles'' book ''Changes'' Harry sacrifices Lloyd Slate, who had been tortured into insanity and a lot more by Mab. Harry, however, [[SubvertedTrope refuses to use this as an easy way out of the guilt]], acknowledging that he's killing him for power, not out of mercy.
* In ''[[Literature/ChroniclesOfThomasCovenant The Illearth War]]'', one of the Ranyhyn (sapient horses) stumbles into an acid swamp and suffers horrific and incurable burns. The lead stallion of the group, after evidently obtaining its permission, beats its head in with his forehooves to kill it instantly.
* In Creator/RobertEHoward's "The Shadow Kingdom", Literature/{{Kull}} and Brule promise each other this, in event of their being mortally wounded -- because the Snakemen can [[MadeASlave enslave]] the souls of those they kill.
* Being set in feudal Japan, ''Literature/TalesOfTheOtori'' is all over the various "a good death is better" tropes. Early the first book, Takeo climbs a castle wall to finish off members of a persecuted religious group who have been hung there to die. Later in the same book, he does the same for his adopted father, Shigeru.
* In ''[[Literature/HisDarkMaterials The Subtle Knife]]'', Serafina Pekkala mercy kills a fellow witch who's being [[ColdBloodedTorture tortured for information]] by agents of [[CorruptChurch the Magisterium]] about the prophecy regarding Lyra.
** Later, in ''The Amber Spyglass'', Lyra's group finds a badly injured frog on the road, missing several legs so it can only hop in a circle. The trope is then discussed: the Gallivespians suggest mercy killing the frog to spare it further pain, while Will counters that, in spite of everything, the frog might still prefer life to death. Since they can't ask the frog for its opinion, they end up leaving it alone.
* In ''Literature/{{Metro 2033}}'', Artyom is forced to kill Daniel, when the latter is ambushed in the library by a librarian and is fatally injured by being disemboweled by it. What makes it even worse is that the librarian's hand is feeling around in Daniel's stomach/torso, and mimicing both Artyom and Daniel whilst they talk.
* Subverted in ''Literature/WorldWarZ''. A group of neighborhood protectors come under attack by what they think are zombies and one is bitten. He asks the others to kill him so he doesn't turn. Then one of them notices that the "zombie" bleeds red blood. He was just a human whose mind snapped.
** Also, performing this "service" became standard practice for chaplains in the Russian armed forces, a task they embraced in order to avert bitten soldiers' church-condemned suicides.
* [=ShadowClan=]'s [[TheMedic Medicine cats]] in ''Literature/WarriorCats'' are taught to feed deathberries to terminally ill or dying cats, to prevent prolonged suffering.
* In ''Literature/DiesTheFire'', some of our heroes happen upon a group of Eaters (cannibals), some of whose victims are still alive but in horrible, and thankfully undescribed, condition. One of the protagonists asks them if they want to die, and since none of them are mentioned later, we can assume he kills them.
** In a later book of the same series, a mortally wounded woman asks her commander to kill her quickly.
* A potential motive for one of the murders in ''Literature/SadCypress''. The accused, Elinor Carlisle, is suspected of her aunt's murder. The strongest possible motive is said aunt's huge inheritance, but another is the Mercy Kill; the aunt was an invalid who just had a second stroke and couldn't stand the thought of being helpless.
* In Plague, the fourth book of the ''Literature/{{Gone}}'' series, Sam does this to Hunter to save him the slow, agonizing death that would come with the bugs eating him from the inside out. Dekka wants Sam to do the same for her, but he figures out a way to save her.
* The title of Horace [=McCoy=]'s ''Literature/TheyShootHorsesDontThey'' derives from the practice of shooting injured horses to put them out of their misery. After the novel's protagonist is arrested for shooting another character -- who'd been DrivenToSuicide, couldn't bring herself to pull the trigger, and [[ICannotSelfTerminate begged him to do it for her]] -- and the cops ask him why he did it, he recalls seeing his grandfather euthanize a horse in this manner as a boy, and utters the phrase.
* In ''Literature/{{Antrax}}'', [[WarriorPrince Quentin Leah]] and Elven Hunter [[ActionGirl Tamis]] spend the entire book trying to perform one on their {{Mentor}}, [[spoiler:Ard Patrinell]], who has become one of [[RoboticPsychopath Antrax's]] [[SlaveMooks brain-controlled]] [[HollywoodCyborg wronks]], something that is acknowledged in-universe as a FateWorseThanDeath (the victim remains alive and aware but subjected to Antrax's will). Given that the wronk in question is an ImplacableMan, this is not easy and ends horribly for all involved with [[spoiler:Patrinell and Tamis both dying and Quentin completing his transformation into a FailureKnight]].
* In Creator/JackCampbell's ''Literature/TheLostFleet'' novel ''Invincible'', the bear-cows kill their wounded. The humans come to suspect that it's a means of keeping them from being kept alive as prey.
* In ''Literature/SomeoneElsesWar'', [[ShrinkingViolet Ruth]] kills her baby daughter so she won't grow up to live [[ChildSoldiers the same life]] [[SexSlave her mother did]].
* Happens a few times in ''Literature/{{Timeline 191}}'', most notably when PresidentEvil Jake Featherston is forced to kill his secretary and MoralityPet, Lulu.
* In Literature/TheHungerGames (novel and film), Katniss [[spoiler: mercy kills Cato to put him out of his misery when he's being ravaged by muttations]].
** Peeta mercy kills the female tribute who was tortured by the careers.
* Referred to as "Pasquale's Grace" in the ''Literature/{{Safehold}}'' series. At least one Temple Loyalist commander has taken to ordering it done to wounded Reformists since it's more merciful than taking them alive so that the Inquisition can torture them to death instead.
** it was also done by a captured captain to one of his midshipmen, again to save him from (more) torture.
* Creator/GeorgeRRMartin gives a memorable one to the BigBad's Dragon, Sour Billy Tipton, in his novel ''Literature/FevreDream''. Tipton has earnt a partial redemption by attacking his deceitful boss, but received further terrible wounds in so doing (he's already been damaged so badly prior to this that he's been hauling himself along the floor by his fingertips, biting on his knife to dull his pain). Aferwards, Joshua York quietly breaks Tipton's neck. "There was no hope for him."
* In Creator/SarahAHoyt's ''Literature/DarkshipThieves'', Thena urges this on Kit after she's burned by radiation.
* In ''LightNovel/FateZero'', following Emiya Kiritsugu's ExactWords contract with Kayneth Archibald, he personally is forbidden from killing Archibald... [[LoopholeAbuse but the contract neglected to include]] [[ActionGirl his partner, Maiya.]] Following this, the semi-immune to bullets and surprised Archibald requires a mercy kill from Saber.
* In ''Literature/TheHost'' An old man in the human community is painfully dying of bone cancer. Jared steals enough painkillers for Doc to give him an overdose.
* In Creator/AndreNorton's ''Literature/{{Catseye}}'', Zul tells Troy to help him kill the {{Uplifted Animal}}s, because the alternative is the patrolmen getting the truth out of them and then killing them.
* In ''Literature/TheLastFullMeasure'', one nameless soldier shoots a wounded man so he doesn't have to burn to death after the Battle of the Wilderness.
* In TamoraPierce's ''[[Literature/CircleOfMagic Cold Fire]]'', the villain of the story is sentenced to be burned at the stake. Daja decides that no matter what he's done, she can't stand there and watch that, and uses her magic to incinerate him instantly.
* ''Literature/ThePowerOfFive'': [[spoiler: Present!Matt is killed this way by Richard, after being captured and tortured by the Old Ones.]]
* In ''Literature/FrostflowerAndThorn'', Frostflower speeds up a condemned warrior's time to help her die faster.
** [[spoiler:Later on Thorn threatens to MurderSuicide them both unless Frostflower uses her powers, believed to have been lost due to her [[VirginPower rape]] earlier in the story. The threat backfires when Frostflower agrees it's probably for the best.]]
* In ''Literature/ThoseThatWake'', this is done to [[spoiler:Brath]] in the first book, as hopelessness has corrupted him beyond help.
* Happens to several characters over the ''Literature/{{Newsflesh}}'' series, when they're facing viral amplification. This is also a safety measure for those around them.
* ''[[Literature/CiaphasCain The Last Ditch]]'': Cain doesn't know if the first crewman targeted by a daemonhost is alive or dead, but takes time to put a lasbolt through the guy's head just in case.
--> It was too late to save his life, but I might still have been in time to preserve his soul.
[[/folder]]

[[folder:Live-Action TV]]
* In ''{{Firefly}}'', it is universally accepted that a quick death from a bullet or drug overdose is vastly preferable to what a Reaver would subject you to. It's also a common (but ''not'' universal) opinion that if you encounter someone who lived through a Reaver attack, they're likely better off dead rather than be allowed to [[GoMadFromTheRevelation go mad from what they saw]].
** Mal performs a mercy kill at the beginning of the BigDamnMovie. When a civilian is caught by a group of Reavers during a raid, Mal shoots him, [[InstantDeathBullet killing him instantly]], so that he doesn't have to feel the torture the Reavers are going to put him through. While Zoe agrees that shooting the man was "a piece of mercy", she [[WhatTheHellHero calls Mal out]] on having shoved him off their vehicle in the first place.
** Also, in TheMovie, River begs Simon to kill her - partially because she [[DrivenToSuicide doesn't want the others to suffer because of her]], and [[ICannotSelfTerminate can't kill herself because she's chained to the floor]], but also partly because she [[FateWorseThanDeath doesn't want to be sent back]] to [[SchoolForScheming the Academy]].
* In the last episode of TheBigC, the main character, a woman on hospice care with late-term stage 4 skin cancer, begs her brother to find someone to help her die, because she is in pain (despite the morphine) and can barely see. To say he is upset at the prospect is a severe understatement.
* On ''Series/{{Angel}}'':
** In "Dead End", a season 2 episode, Lindsay tracks down the unwilling donor of his 'evil' new hand and, finding him and a number of other innocents locked up in a Wolfram & Hart body-part-harvesting factory, kills him, as well as any of the rest who are too crippled to live.
** At the end of Season 4, Connor is so broken and destroyed by everything that's happened to him that he's not really himself anymore. As part of their deal to recruit Angel, Wolfram and Hart offer him the chance to give Connor his life back - a deal that apparently can only be activated by killing him as he currently exists.
-->'''Angel:''' I love you, Connor.
-->'''Connor:''' So what are you going to do now?
--> '''Angel:''' Prove it. *STAB*
* ''Series/BuffyTheVampireSlayer'':
** Dark!Willow feels the pain of everyone in the world, [[WellIntentionedExtremist and intends to do this on a global scale.]]
** In Season 9, Angel and Faith kill the people who took the Mohra Demon blood, as they kept growing giant tumors all over their bodies.
* In the Japanese Tokusatsu Show ''{{Garo}}'', the Monsters of the week are humans possessed by demonic entities called Horrors. Whenever a human is possessed by a Horror, they will feel excruciating pain. This makes almost every kill the main character makes a mercy kill.
* On ''Series/TheSopranos'', Tony Soprano murders his cousin, Tony Blundetto, in order to save him from being tortured to death by Phil Leotardo. It comes back to bite Tony later, as Phil doesn't feel satisfied by this.
* Al Swearengen does this for Reverend Smith in ''{{Series/Deadwood}}'', smothering him to save him from the lingering and painful death of a brain tumour.
* In the first story of ''Series/StargateAtlantis'', then-Major Sheppard does a Mercy Kill on his Colonel, who has just been fed on by a Wraith.
** It's brought up again during the siege that the new military head doesn't believe it was a Mercy Kill until he experiences the feeding for himself. Before he's carted off with the wounded he tells Sheppard 'I wish you had been there for me.'
** Happens again in ''Series/StargateUniverse', when Col. Young puts Airman Riley out of his misery from being pinned under debris after a shuttle crash.
* In ''Series/{{Lost}}'', Sawyer badly botches an attempted Mercy Kill: accidentally putting a bullet into the marshal's lung rather than his heart, leaving him to bleed slowly and painfully to death. Jack, despite his previous statements against the idea[[note]]As a doctor, Jack strongly believes in ThouShaltNotKill, coupled with hopes that they would be rescued in time to save the marshall's life[[/note]], quickly euthanizes the marshall to prevent his now inevitable death from being drawn out and agonizing.
* The Cybermen of ''Series/DoctorWho'' reproduce by removing the flesh and altering the mind of other species, a nightmarish and irreversible process to which this trope is the universally accepted solution. When the Daleks adopted a similar strategy in "Revelation of the Daleks", the trope also appeared when one character mercy killed her own father who was partially mutated into a Dalek.
-->'''The Doctor:''' You sleep now, Sally. Just sleep.
* The nature and purpose of the kill isn't apparent at first, but in the first episode of the new ''Series/BattlestarGalacticaReimagined'', Caprica Six's murder of a baby in the street could definitely be seen as a merciful death-the entire planet is about to get nuked to hell.
** A more conventional example would be in a later episode where Six mercy killed another Six. The second Six had previously been drowned in a septic tank; a horrible death to be sure, but then had the added disadvantage of being ressurected with the memory of her terror, pain, and the look on her killers face. Cue months of horrendous psychological trauma, and finally, permanent death becomes available.
** Deckhand Socinus while they're on Kobol after a crash landing(the episode with the mother-frakker line)is given an overdose of a painkiller as he's in agony from his injuries and his survival is unlikely.
* In one of the Forth Season episodes of ''{{Blackadder}}''. General Melchett reveals he's quite fond of Mercy killing.
-->'''Gen. Melchett:''' Now George, you remember when I came down to visit you when you were a nipper, for your sixth birthday? You used to have a lovely little rabbit, beautiful little thing, do you remember?
-->'''Lt. George:''' Flossie.
-->'''Gen. Melchett:''' That's right, Flossie! Do you remember what happened to Flossie?
-->'''Lt. George:''' You shot him.
-->'''Gen. Melchett:''' That's right! It was the kindest thing to do after he'd been run over by that car.
-->'''Lt. George:''' By ''your'' car, sir.
-->'''Gen. Melchett:''' Yes, by my car. But that, too, was an act of mercy when you remember that that dog had been set on him.
-->'''Lt. George:''' ''Your'' dog, sir.
-->'''Gen. Melchett:''' Yes, yes, my dog. But what I'm trying to say, George, is that the state young Flossie was in after we'd scraped him off my front tyre, is very much the state that young Blackadder will be in now: if not very nearly dead, then very actually dead!
* ''Series/{{House}}''. "Informed Consent" deals with an elderly patient who is slowly and painfully dying requesting the doctors to help him die. Chase argues that this is part of the job, House seems willing but needs to solve the puzzle. Once they diagnose him with a terminal illness, Cameron apparently does the Mercy Kill while the patient sleeps.
** This is dealt with again in "The Dig," when we find out that Thirteen euthanized her slowly dying brother, who like her has Huntington's disease, [[ICannotSelfTerminate at his request]]. This leads to a rather dark HeartwarmingMoment when she worries that, when her disease progresses [[FateWorseThanDeath to the point where she can no longer control her mind or body]], she will have no one there to do the same for her, and House tells her that when the time comes, he will.
* On ''DarkAngel'', Max kills her brother Ben rather than allow him to be reclaimed by Manticore. The whole thing is an {{homage}} to ''Literature/OfMiceAndMen''.
** Averted earlier in the same series. Max and Zack are weighing up whether or not to [[FateWorseThanDeath bring Brin back to Manticore]] to save her from the progeria she is dying of (the 'not' option would, given the example above, more than likely have involved some level of this trope) but Brin begs them to take her back there because she doesn't want to die. She has a FaceHeelTurn and is a full-tilt Manticore puppet soldier when next they meet, so it would have been better to go with the Mercy Kill.
* In ''ThePacific'', a Japanese soldier, having just seen his friends die all around him on Guadalcanal, stumbles out into the lake, really not up for this any more. The Americans, having just seen a Japanese soldier pretending to surrender only to kill two Marines with a grenade, start sniping him in the arms and legs for "sport". One of the main characters shoots him in the chest to end it.
* Dr. Donald "Ducky" Mallard of ''Series/{{NCIS}}'', off-screen, was forced to work for the CIA/MI-6 during the SovietInvasionOfAfghanistan, patching up people who had been tortured. So they could be tortured again. Eventually, he puts one guy out of his misery.
* In one episode of ''Series/ColdCase'', a man suffocated the woman he loved who was being raped by a group of his drunken friends.
** And in another, a young girl in TheFifties is smothered to death by her friend after she's completely broken (mentally, physically, etc.) in the mental hospital where her family locked her up.
* Parodied in one episode of {{Mongrels}} where Nelson thinks he has rabies and asks Marion to kill him if he goes mad, unfortunately [[UnsympatheticComedyProtagonist he still wants to kill him]] after it turns out he's not rabid
* A non-lethal variety is featured on ''Series/TheAmazingRace''. When a team gets so far behind that it would be impossible for them to catch up to the other teams, they are given a clue that sends them straight to the Pit Stop for their elimination. "Mercy Kill" is even the FanNickname for this clue.
** Sometimes, even that can't be used due to circumstances. One time, a team got stuck in a Road Block, unable to find the hidden clue despite hours of work. Eventually, the host appeared in person to put the team out of their misery.
* ''Series/{{Dexter}}'' faces himself with having to help an old friend put out of the misery of cancer. Although a killer by nature, he is reluctant to do it, but being in a time where his Code makes less sense in favor of helping his friends, he reluctantly agrees. See also the Literature entry.
* In an episode of ThirdWatch, Bobby is asked to help his retired teacher stop hurting.
* Played with on one episode of ''{{Reno 911}}''. While out on patrol, two of the officers are asked by a distraught man to Mercy Kill his dying dog. So, one officer takes his gun and shoots it. While the man is thanking them, a woman comes out of the house and screams when she sees the dog. It turns out the dog was hers and the man was actually a neighbor who wanted the dog to stop howling at night.
* Parodied in ''Series/{{Mash}}''. [[CavalryOfficer Colonel Potter's]] jeep has been run over by an out of control tank and smashed to pieces. He walks up to it, pulls out his gun, and shoots it in the engine.
* ''{{Smallville}}'':
** Chloe is forced to do this to Davis [[spoiler:as he begins to transform into Doomsday.]]
** [[spoiler:Lex claims this in the series finale when he kills his half-sister Tess, saying that he does it so that she doesn't end up like him. What he doesn't realize is that, as she tells him as she dies, he didn't need to worry about that- Clark had already saved her.]]
** Tess herself had previously attempted a Mercy Kill via cyanide injection on a suffering and apparently dying adolescent clone of Lex. [[spoiler: His "suffering" turned out to be from the activation of the previously unknown Kryptonian DNA weaved into his genetics, and the needle couldn't break his skin.]]
* Neil Chung in the ''Series/{{Fringe}}'' episode "Making Angels" uses Observer technology to read the future and an arcane poison to terminate those with especially bleak futures. In one case he slips up and causes a paralyzing accident he was trying to avert.
* Done several times in Series/TheWalkingDead to zombies. Even though as a zombie the afflicted can't feel the pain or horror of their situation, the characters (especially Rick) often consider it a mercy kill to end their existence.
** Also done by Dr. Edwin Jenner in the finale of Season 1. He considers continued living to be pointless and doomed to end in terror and agony, and though he eventually allows the other survivors the choice of leaving and continuing to fight for survival, he also offers anyone who stays an instant and painless death when the CDC building explodes--and at least one of them accepts this option.
** In Season 2, Daryl delivers one to Dale via a shot to the head, after he's been disemboweled by a zombie.
* In one episode of ''Series/CSICrimeSceneInvestigation'', the victim of the week was a girl whose family had been using her as a glorified bone marrow bank for her very ill brother. The murderer was the brother himself in an attempt to end both her pain and his own. Grissom isn't very sympathetic, arguing that the brother could have simply killed himself, ending his pain and giving his sister the opportunity for a normal life; when he responds that suicide is a sin, Grissom, in the iciest voice imaginable, replies, "But you think your God forgives murder?" The rest of her relatives also end up going to jail for helping the brother, blatantly the favorite child, cover up the murder.
* ''Series/{{Supernatural}}''. While soulless, Sam encounters five men who are AllWebbedUp and infected with venom by a spider demon. Instead of taking them to a hospital, he arbitrarily decides to shoot them to spare their agony, then burn the bodies. [[spoiler:Unfortunately the spider demon was actually creating more of itself, and the result is ImmuneToBullets and fire. One of the victims, an ally Sam used as TheBait to find the demon, survives and wants revenge. He points out that rather than sparing him, Sam has actually created more monsters.]]
* In the last episode of {{Series/The4400}} Shawn does this when Danny is dying painfully from his ability.
* In the ''Series/MastersOfHorror'' episode "Imprint", the disfigured prostitute claims to have murdered Komomo to spare her the life of a prostitute and being tortured by the madam. She believes that she sent Komomo from Hell to Heaven.
[[/folder]]

[[folder:Tabletop Games]]
* The humans of ''TabletopGame/{{Warhammer40000}}'' refer to mercy kills as "The Emperor's Peace," and SpaceMarine [[CombatMedic Apothecaries]] carry a special pistol for just this purpose.
** And then they chainsaw open the chest of the fallen to get at his genetic material. With the utmost respect, of course.
** Similarly, but without the chainsaw, psykers carry what they call "Mercy Blades". When the Warp is trying to get into your head, a quick stab through the heart is ''vastly'' preferable.
* ''TabletopGame/MageTheAscension'' has the Euthanatos, an entire {{splat}} of mages (''player character'' mages, no less) who use this as their [[PlanetOfHats hat]].
* In ''TabletopGame/WarhammerFantasyRoleplay'', [[DarkIsNotEvil Amethyst wizards]] have a spell for {{Mercy Kill}}s. It can be used on any enemy who has taken Critical Damage. This makes it very handy for dispatching that one beastman who has Tzeentch's own luck on the Critical Hit table and goes 3+ rounds without actually taking a CriticalHit that will kill him.
* In the TabletopGame/{{Ravenloft}} setting, where lycanthropy is even more virulent and dangerous than in most D&D settings, this is the standard and expected outcome if an attempt to cure the affliction fails. As such a failure generally indicates an afflicted person is coming to ''like'' their condition, it's as much mercy for everyone else as for them.
[[/folder]]

[[folder:Theater]]
* OlderThanFeudalism: Though it tends to get lost due to ValuesDissonance, this is one reason Creator/{{Euripides}}' Theatre/{{Medea}} opts for OffingTheOffspring when [[TooDumbToLive Jason]] marries someone else, since as a foreign-born woman her children would lose their Greek citizenship and inheritance once Jason remarried, and were very likely to be sold into slavery.
[[/folder]]

[[folder:Video Games]]
* One way of getting out of the tutorial in ''VideoGame/ProjectZomboid'' is smothering your injured wife with a pillow.
* In the Playstation 1 game ''[[Franchise/DieHard Die Hard Trilogy]]'', the ''Film/DieHard2'' segment is an FPS rail shooter. Shooting a character who's on fire is considered a "mercy kill" and worth points.
* In ''VideoGame/MassEffect1'', there is an optional scene where [[PlayerCharacter Shepard]] can perform a Mercy Kill on salarian troops who were indoctrinated by [[TheVirus Sovereign]]. And knowing exactly [[AndIMustScream how horrible Reaper]] [[FateWorseThanDeath indoctrination is]], it's hard to disagree with the mercy kills.
** There is also a section where you find a ship, empty with the crew apparently dead, aside from a man on life support, whose brain has been described as 'dead'. The crew wanted to put him off it, to which his biotic girlfriend Julia reacted... violently. She will attack, and you may take him off the life support yourself. Your own squad members consider it the merciful thing to have done.
** On Noveria, the [[HiveQueen Rachni Queen]] asks you to do this to her own kids; the rachni are a telepathic species who need to be raised around others to develop properly, but the resident mad scientists took her kids from her before they were ready and the 'silence' has driven them insane. On the same planet, Matriarch Benezia declines medigel after you beat her, knowing that since she's been [[MindRape indoctrinated]] already living on would just involve being subjected to more of it.
** If you let Gavin Archer keep David at the end of 2's Overlord DLC, ''VideoGame/MassEffect3'' reveals that he eventually "ended his suffering".
** The third game gives you the opportunity to do this to a Batarian terrorist grieving for his family and dying of terrible injuries.
* In ''BreathOfFireIV'', about 90% through the game, you finally find Princess Elina. However, she's been [[BodyHorror transformed into a horrific monster]]. She asks her beloved, Cray, to kill her. Even worse, [[KarmaHoudini you never get to punish the guy who did it to her]].
* In ''SaintsRow2'', the main character does this to ease Carlos' pain after he's keelhauled by car by the Brotherhood.
* In ''GearsOfWar 2'', Dom is driven to do this for Maria once he finds her.
** Subverted and Double Subverted depending on the player. In multiplayer getting an execution on an enemy, rewards you with the ribbon Coup De Grace, which means "Mercy kill". How much of a mercy kill? Depends on you stand point: If you're the last guy alive, and your teammates were assholes (towards them) [[NoHoldsBarredBeatdown expect the worst kind of mercy kill ever]]. You should be accounted as lucky if someone just curp-stomps or shoot you as the last one alive.
* ''VideoGame/{{Half-Life 2}}''. Headcrab zombies. The screams. For the love of God, just hurry up and throw that buzzsaw at them before they have to suffer another second...
** Likewise, the Stalkers, which [[BodyHorror barely look human anymore]], and [[FateWorseThanDeath are forced into eternal slavery to the Combine (whom Stalkers are totally dependant upon)]].
* A major element of ''SilentHill2'', as James doing this to his terminally ill wife Mary is the event that causes the entire plot, which examines James' true motivation for doing so. Was it for his wife, to give her peace; or selfish, to get his life back?
** ''SilentHillHomecoming'' has this as an option for the first of two choices (or three, depending on which ending you're going for) that [[MultipleEndings determine the ending you get]]. Alex's mother is strapped to a device and is obviously suffering. You are given the choice to either end her life or not. You can only get the good ending if you mercy kill her.
* In one of the routes in the ''{{Tsukihime}}'' VisualNovel, Akiha is succumbing to her demon blood and begs Shiki to kill her if she loses control. When she does, if you ''don't'' keep your promise and keep her alive, you get a depressing "Normal Ending" where she's basically become a mindless, bloodsucking doll under Shiki's care for the rest of her "life". If you ''do'' kill her, you get a Bad End. No, to get a ''decent'' ending you have to TakeAThirdOption. Also, Shiki killing Satsuki after she became a murderous vampire, earlier on.
* In ''VideoGame/TalesOfVesperia'', just after you finally meet Belius, she gets corrupted by Estelle's Child of the Full Moon powers and you have to kill her.
* In ''EternalDarkness'' when Paul meets Anthony, he does what anyone would do when attacked by a hissing, moaning bastard-sword-wielding zombie and fights back. Afterward, however, he prays for his soul and receives a quick flashback of Anthony's time as the holder of the Tome of Eternal Darkness, making it obvious that this was a bit of a bonus.
* In the game ''TheSuffering'', one can increase their KarmaMeter by mercy killing a guard who has had most of his body eaten by rats inside of a room in an Asylum. Your wife will reassure you that it was "the right thing to do" if you do it.
* One could argue that the defeat of the final boss in ''ShadowHearts: From The New World'' counts, if you consider what Lady/Grace had become.
* At one point in ''VideoGame/{{Unreal}}'' you encounter Nali who are being crucified by the Skaarj. While the game doesn't give you any means of saving them, there's a small consolation in that the game does let you perform a Mercy Kill on the poor guys.
* Numerous bosses in ''VideoGame/WorldOfWarcraft'', particularly in the ''Wrath of the Lich King'' expansion. Several bosses use their last words to thank you.
* The {{flashback nightmare}}s Shadow from ''Videogame/FinalFantasyVI'' suffers from reveal that he became TheStoic because his emotions caused him to chicken out of mercy killing a wounded friend.
* ''VideoGame/BioShock2'' features Gil Alexander, who before the onset of insanity and BodyHorror from massive doses of ADAM recorded messages instructing whomever would find them on how to kill him. His current horrendous and quite insane incarnation, Alex the Great, will beg for his life, leaving it [[KarmaMeter up to the player to decide how to deal with the situation]].
** Later on, Sinclair is turned into a Big Daddy against his will and is forced to obey Lamb's orders on impeding you from your objective by holding onto the necessary key, begging you to take him out while he's [[DyingAsYourself still sane]] over the radio.
* ''VideoGame/DeusEx'': If you tell [=DeBeers=] that Everrett has no intention of treating his illness, he commands you to deactivate his life support.
* ''FarCry 2'' allows you to put down a mortally wounded assisting character, if you let him/her get injured enough times. Or you just feel like it.
* In ''VideoGame/DukeNukem3D'', the babes the aliens have abducted and incorporated into some kind of alien personal holding cell (most likely complete with NaughtyTentacles) beg for Duke to kill them.
* In ''VideoGame/GodOfWar 2'', Kratos comes upon the Titan Prometheus, who as per Greek mythology is chained to a rock with an eagle ripping out his organs every day (which grow back every night, meaning [[FateWorseThanDeath endless torment]]). Kratos mercy-kills him by dropping him into the Fire of Olympus, earning the Rage of the Titans power-up.
** He later does this to his own mother, after breaking a pact causes her to mutate into a grotesque, and obviously in pain monster.
* The ''VideoGame/MetalGearSolid'' series features this as a device at least twice. In ''VideoGame/MetalGearSolid'', Solid Snake kills Sniper Wolf after she is badly wounded in a battle with him. In ''MetalGearSolid3'', the player is forced to initiate the mercy kill of The Boss, making it a PlayerPunch. Both of these characters beg to be killed though the trope description precludes this, but many of the other examples here are similar.
* This is the ultimate fate of The Mother in ''VideoGame/LaMulana'', at the hands of the PlayerCharacter.
* In ''Videogame/{{Halo}}'', when Master Chief finds Captain Keyes [[BodyHorror infected by the Flood]], he choses to give him a dignified death by [[MegatonPunch punching his face in]], which also allows him to get the implants out of Keyes' skull. In this case Keyes had already become assimilated, so killing him was basically the same as killing a human combat form at that point, and the Flood were going to use his knowledge to pilot a Covenant ship off of Halo and spread to other worlds.
* In ''[[VideoGame/KnightsOfTheOldRepublic Knights of the Old Republic II]]'', when the [[PlayerCharacter Jedi Exile]] and Darth Sion have their final showdown, Sion (who is her StalkerWithACrush) says that killing the Exile with his lightsaber is ''nothing'' compared to what Darth Traya is planning to do to her, so he'll put her out of her misery now to spare her from that.
** Also part of Atton's backstory. he was a Sith torturer and "working" on a female Jedi. The Jedi revealed to him that he was Force-sensitive, and gave him a glimpse of the Force. Atton freaked out and realized that he couldn't save her, so he either choked her to death or snapped her neck, then ran like hell from the Sith.
* Mentioned in ''VideoGame/{{Homeworld}}: Cataclysm''; certain large ships are immune to takeover by TheCorruption, taking severe damage instead. The manual tells us that this is achieved by dumping high-temperature plasma into the afflicted sections of the ship and then opening an airlock. Not a pure Mercy Kill in that it's necessary to save the rest of the crew, but the crewmembers about to be ripped apart by flesh-eating nanotech and [[HumanResources used to make network cabling]] would undoubtedly see it that way.
* In ''VideoGame/AssassinsCreedII'', Ezio does this to Jacopo de'Pazzi after Rodrigo Borgia and another Templar fatally wound him as part of YouHaveFailedMe. He later also does this to Savonarola, to spare him burning to death.
* ''VideoGame/TeamFortress2'' - Invoked for BlackComedy in one of the Scout's domination lines directed at the Sniper.
-->''It was a mercy killing, ya live in a... camper van!''
* In ''VideoGame/BaldursGate 2: Shadows of Amn'' you do this to a fellow prisoner in Irenicus' dungeon/laboratory. The poor fellow is being kept alive in a special tank against his will and has died and been brought back countless times. He begs you to kill him by removing the energy cell that powers his life support, which is convenient for you since you need that cell to power a different device.
* The ''VideoGame/Left4Dead'' online comic showed this as part of Zoey's backstory - her mother turned during a family dinner, biting Zoey's father before being put down. Since Zoey and her father had [[GenreSavvy watched the same zombie movies]], they knew what had to come next. Tragically, the same comic later revealed that the genetic immunity to the zombie plague is passed down on the father's side, [[WrongGenreSavvy meaning that the mercy kill was probably unnecessary]].
* In ''VideoGame/{{Fallout 3}}'', you encounter the playthings of Dr. Stanislaus Braun. The karmically good end of the quest is to deactivate the failsafe that kills his victims permanently and traps Braun (who has his own separate failsafe) forever all alone in his virtual world.
* In his backstory in ''VideoGame/FalloutNewVegas'', Boone tracked his pregnant wife Carla and her kidnappers to a Legion slave camp, where he realized rescue would be impossible. Rather than let her and their unborn child be subject to a life of rape and beatings, he decided to shoot her.
** You can also find amputated and mangled troopers in the No Man's Land between Nelson and Camp Forlorn Hope, frag mines set beneath their bodies. They beg you to kill them.
** In Nipton, the only survivors (other than the lottery winner and runner up) are hanging on crucifixes and on death's door. Saving them is impossible, and it is far kinder to shoot each of them in the head.
** Boone also notes that as an NCR sniper, he's had to do this to various prisoners of the Legion since they deliberately torture them in plain sight to reduce morale.
* After shelling North Korean troops with white phosphorus mortar rounds in ''VideoGame/{{Homefront}}'', you have the option of shooting the burning soldiers to earn a 'mercy' achievement (there's another achievement for just letting them burn).
* Kerkan from ''SekienNoInganock'' is a serial killer who believes ''everyone'' is eligible for a mercy kill, but tends to only pick the truly hopeless.
* In ''VisualNovel/FateStayNight'''s Heaven's Feel route, Shirou is [[TearJerker forced to do this]] to [[LadyOfWar Saber]] after she is hit by TheCorruption and turned into [[SuperpoweredEvilSide Saber Alter]]. [[PlayerPunch Especially bad]], as [[JeanneDArchetype Saber]] had been a symbol of purity throughout the game, and had been your primary love interest in the first route, as well as a possible love interest in the second route.
** In one bad ending Shirou is reduced to a torso and head suspended in a liquid that has left him drugged into insensibility. When Rin finds him she shatters the container, letting Shirou die.
* In ''VideoGame/DragonAgeOrigins'' the prophet Andraste was condemned to be burned at the stake after she was betrayed by her husband to the Tevinter Imperium. The Tevinter Archon Hessarian who ordered her execution felt pangs of guilt and compassion at the last minute and impaled Andraste to spare her the pain of burning to death. Afterwards he converted to the Chant of Light and helped spread it over Thedas. Replicas of his sword are called "Blades of Mercy" and are considered gifts of great honor in the Imperium.
** The first game, while helping the Dalish with their werewolf problem, [[TheHero the Warden]] runs into a Dalish-turned werewolf who gives them her scarf, asks them to deliver it to her husband, and kill her. Doing so gains approval with compassionate party member Leliana.
* This happens a ''lot'' in ''VideoGame/DragonAgeII'', and it usually overlaps with KillTheOnesYouLove just to rub salt in. You can also find one of the aforementioned Blades of Mercy and give it to Fenris, a runaway slave from Tevinter. Depending on your relationship, he either finds the irony amusing or tells you to keep it.
** Near the beginning, Aveline's husband Wesley is infected by the darkspawn. He begs for her to kill him to spare him the slow, agonizing death the taint would bring him. Hawke can either force Aveline to do so, do it themself, or leave the choice to Aveline; who then kills Wesley herself.
** Later on, Hawke may have to do this to their sibling, if brought into the Deep Roads without Anders in the party.
** At the end of the quest "Tranquility," Anders's friend Karl is revealed to be made Tranquil; which cuts a mage off from the Fade, removing their magic and ability to feel emotions. When Karl is temporarily restored by proximity to a spirit, he begs Anders to kill him before it wears off, preferring death to living as an empty husk.
** Varric can do this to his lyrium-crazed brother Bartrand (Varric already wanted to kill him for betraying the party, but finds a broken, gibbering wreck rather than a monster).
** SerialKiller Kelder will ask you to do this, as he can't stop himself and his magistrate father will just keep covering up for him. You can use your [[FanNickname Murder Knife]] or let Fenris do it - either way, it's one of the few actions your party unanimously agrees on.
* Multiple times in ''LANoire'', mostly at the end or in flashbacks at occur near the end. One flashback shows [[TheMedic Courtney Sheldon]] running up a hill to administer a fatal dose of morphine to an injured and screaming soldier. Another flashback reveals an accidental but nightmarish atrocity: a flamethrower soldier torched a cave full of women and children, thinking they were soldiers, and the US soldiers have to shoot each of them to put them out of their misery. Finally done by Jack Kelso for Ira Hogeboom, the aforementioned flamethrower soldier, when the latter can no longer live with what he's done.
* Skint asks for one at the end of ''VideoGame/TheReconstruction''. Dehl gives it to him.
* In ''VideoGame/JadeEmpire'', the Water Dragon requests one of these from the Spirit Monk. The dragon's body is being kept alive so that her blood can be used to end the drought, while her divine power is being siphoned off by the emperor.
* BigBad Kerghan in {{Arcanum}} has spent centuries studying the afterlife, concluded that all the suffering living beings must endure means that death is the preferable state of existence, and intends to enact this trope upon ''[[OmnicidalManiac all living things]]''.
* A githzerai woman in PlanescapeTorment is violently ill and dying a slow death from the polluted air of the Lower Wards. Unable to even speak, she beseeches the Nameless One through gestures to end her life.
** A somewhat more comical mercy kill comes in the form of a zombie who has been animated to provide the local coffin maker with a permanent listener--the coffin maker is rather annoying and will talk endlessly about anything and everything, and is so clueless that he doesn't even realize his best listener is a zombie. The zombie begs the Nameless One to undo the enchantment and return him to nothingness because he can't bear to listen to the man any longer.
* [[SealedEvilInACan Axenos]] from {{Wizard101}} uses the more villainous version of this trope when he decides that to reward the player for releasing him by killing them first so they do not have to witness the horrors he'll bring upon the Spiral. Fortunately he's more bark than bite and no tougher than most boss battles.
* ''VideoGame/NieR''
** This is done ''unintentionally'' on a species-wide scale. Humanity has been slowly going unavoidably extinct for over a thousand years; beating the BigBad finishes it off, reducing an inevitable several centuries of further decay down to a few years.
** Nier has the option of mercy-killing Kainé in several of the endings.
* ''Videogame/SpecOpsTheLine'' - Mercy killing is a game mechanic; often times when you kill an enemy in a place other than the upper torso or head, they'll fall over and start dying slowly on the ground, crying in pain. [[PlayerCharacter Walker]] can perform an "Execution" move on them - at first, they are genuine mercy, such as a quick bullet to the head or snapping their neck. As the game goes on, Walker becomes increasingly violent and tries to inflict as much pain as possible, by blasting out their kneecaps then shooting them in the heart, or even more brutal techniques. When Walker uses [[spoiler: white phosphorus on the soldiers]] in "The Gate", they will ''beg you'' to kill them as you walk by. [[spoiler:At the end, the ''player'' can choose to [[DrivenToSuicide do this to Walker]] if they want, and after [[TraumaCongaLine all the crap he's been through and done]], it's a surprisingly tempting and reasonable option.]]
* ''FinalFantasyAdventure'' makes the player do this to Amanda - she's [[TheCorruption cursed to turning into a Medusa]] that will victimize the nearby village, but her curse also means that the hero can gather her tears to cure her brother, who was [[BalefulPolymorph turned into a parrot]]. She's already transformed to the point [[ICannotSelfTerminate where she cannot commit suicide]]; the player must attack her to end her misery.
* In ''[[VideoGame/{{Borderlands2}} Borderlands 2]]'', this is a key plot point for stopping the BigBad who locked away [[spoiler: his own daughter]] as a power source for his superweapon. She begs to be [[IDieFree freed by death]], going so far as to point out the necessary weak spots ''and supply the player(s) with extra ammo.''
* In ''VideoGame/{{Thief}} 2: The Metal Age'', Garrett comes across a captured spy during one mission, who has been locked in a freezer. After the spy gives Garrett the information he managed to obtain, he requests a mercy killing rather than freezing to death. Although if you oblige, the game still counts this as "killing an innocent".
* In the ''LegacyOfKain'' series, [[spoiler:Kain's attempted murder of Raziel]] is actually one of these. He had known for some time of [[spoiler:Raziel's destiny to trapped in the Soul Reaver]] [[FateWorseThanDeath and he believed death would be preferable]]. [[spoiler:When Kain finally sees the Elder God after Raziel's sacrifice purifies him, Kain [[MyGodWhatHaveIDone is distraught]] when he realizes he had actually condemned Raziel to a different FateWorseThanDeath as the Elder God's slave.]]
* In ''VideoGame/TheWalkingDead'' a boy in your party, [[spoiler:Duck]], is about to succumb to the zombie infection. You must choose who will put him out of his misery. You the player character, or the boy's father. [[spoiler:Later in the game you can choose what you want Clementine to do with you. Shoot you before you turn, or run away and leave you chained to a radiator]]
** [[spoiler:If Ben is still in the party in Episode 5, this happens after he [[ImpaledWithExtremePrejudice falls onto a metal bar from a balcony]], leaving him unable to move. Kenny chooses to stay behind to make sure Ben didn't turn. Seconds after they are out of sight, [[TearJerker Ben's screams are cut short by a gunshot.]]]]
* In ''VideoGame/The3rdBirthday'' Aya does this to Kyle Madigan upon his request, after he becomes... [[EldritchAbomination Whatever the hell that was.]]
* In ''VideoGame/ShinMegamiTenseiStrangeJourney'', you travel through the base of Jack's Squad and encounter [[spoiler:a group of demons in life-sustaining tanks, being used for a variety of unethical experiments, screaming and crying as their organs are harvested. You have the option of turning off their life support.]]
* Pops up with heart-crushing regularity in ''VideoGame/ShinMegamiTenseiIV''; [[spoiler:humans who become demons cannot be restored, the National Defense Divinities all hate their summoners but cannot escape their leashes, the people imprisoned in Reverse Hills for use in Red Pills probably all dream about dying...]]
* ''Adventure War'', a virtual gamebook made by one-guy studio Malign Black, plays this for laughs: You can let your character "search and search and search" a certain dead-end room, and {{God}} Himself will decide to put you out of your misery.
* The ending for ''{{Outlast}}''. [[spoiler:Miles was killed by the police officers to prevent the Walrider from escaping the asylum and using Miles until he's no longer useful.]] Too bad they made things worse for themselves.
* Early on in ''VideoGame/DiabloIII'', you have to help New Tristram's blacksmith, Haedrig Eamon, kill his wife Mira and everyone else who's been bitten by the [[ZombieApocalypse zombies]] attacking the town. The page quote is the Demon Hunter's response to Haedrig's question about how he could kill his own wife. Later on in the game, [[spoiler:when Leah is possessed by Diablo himself following Adria's betrayal, the final battle is essentially this for Leah as well as a final reckoning for the Prime Evil]].
* In ''VideoGame/AssaultOnDarkAthena'', Riddick encounters a man strapped to an operating table who's being converted into a Ghost Drone. The man begs Riddick to pass a message on to his family and kill him before the doctors can finish. It's up to the player to do so.
* In ''VideoGame/TheLastOfUs'' you will have to go in a building filled with spores (Said spores turn people into "zombies"), that forces you to wear a gas mask, on said building you will encounter a survivor who is pinned under a piece of wood and his gas mask broke, meaning that he will turn into an Infected sooner or later. He will cry out to you to not "Leave him to turn", and you have the option to shoot him to put him out of his missery
* In VideoGame/BrutalDoom you can save trapped marines and they will aid you on the level, and they will often talk to the player, on one of his lines he tells you to shoot him if he ever starts to turn into [[ZombieInfectee "one of those things"]]
* If anyone defeats the Red Riot during Scenario 45 in ''VideoGame/SuperRobotWarsUX'', the pilot will begin to burn alive in his cockpit. Jin, acting quickly, shoots down his subordinate so that he doesn't have to suffer.
* In ''VideoGame/DisneyPrincessEnchantedJourney'', this is implied to happen with Zara. She agrees to hold the heroine's hand and disappears.
[[/folder]]

[[folder:Webcomics]]
* The [[BigBad Sovereign of Sorrow]], from the webcomic ''CaptainSNES'', apparently wants to do this to ''[[OmnicidalManiac everyone]]''.
* In ''Webcomic/CuantaVida'', BLU Medic does this to BLU Sniper after Sniper is DrivenToSuicide after losing his lover and then his eyes. He ''claims'' to have done this at the Sniper's request, but a little while after that he tries to do it again when the BLU Scout gets [[GameBreakingInjury a crippling injury on his leg]]; "a Scout that can't run is a dead weight". The Scout was ''not'' consulted about this beforehand, and fortunately the BLU Spy is able to intervene.
* Parodied in a recent ExterminatusNow, [[http://exterminatusnow.comicgenesis.com/d/20100801.html Alien Shout Out ahoy]]
* Mr. Rovainen from ''Webcomic/GirlGenius'' [[http://www.girlgeniusonline.com/comic.php?date=20040324 does it]] [[http://www.girlgeniusonline.com/comic.php?date=20040326 preemptively]].
* In ''Webcomic/{{Goblins}}'' a mysterious character (his identity is revealed later) snaps the owlbear's neck who is about to be tortured. It's also revealed that this was the actual meaning of Saves-A-Fox's PropheticName. In an attempt to ScrewDestiny, when she found the fox she was supposed to save, she killed it instead, and only later found out it was actually suffering from a terminal disease.
* Arguably, [[http://www.giantitp.com/comics/oots0133.html this]] strip of ''Webcomic/TheOrderOfTheStick''.
* ''Webcomic/SluggyFreelance'': Explicitly stated by Riff that he is going to do this to Zoe.
* ''{{Thunderstruck}}'' offers [[http://talesfromthevault.com/thunderstruck/comic280.html a straight example]], with a good ol' NeckSnap being the method used.
* In ''TheZombieHunters'', the [[OurZombiesAreDifferent "Mercy" zombies]] perform arguably the creepiest Mercy Kill ever. They only approach sick, wounded or dying humans, and [[SuperPersistentPredator follow them]], [[TheOnlyOneAllowedToDefeatYou protecting them]] from ''other'' more [[SuperPoweredMooks violent]] breeds, until they collapse. Mercies then deliver a single bite to a vital artery, and [[PietaPlagiarism hold]] [[CradlingYourKill the dying victim]], gently stroking their hair and cooing softly. They'll even remain with their victim for hours [[ViralTransformation after they turn]]. [[AllThereInTheManual Website materials]] state that some traumatized [[ActionSurvivor survivors]] seek them out as a [[ICannotSelfTerminate form of suicide]], hence the name. These same supplementary materials recommend that human rescuers ''euthanize'' many survivors of [[TheBerserker Berserker]] zombies, who [[AxCrazy love to]] [[ColdBloodedTorture torture]] and [[NoHoldsBarredBeatdown beat]] their victims before biting them.
* In ''Webcomic/EightBitTheater'', Black Mage mentions that he killed his own brother, who was blind. When questioned about it, he responds that it was an act of mercy, and it would've been far more cruel to let his brother live after what BM had done to his eyes.
** Black Mage gets points for the most sadistic and needlessly elaborate "mercy kill" of all time; he trapped his blind brother in an uneven room filled with sharp corners and tiger pits. Then pushed him into one of the tiger pits when it looked like he was going to make it across.
* In ''Webcomic/AndShineHeavenNow'', it's revealed that [[{{Hellsing}} Walter and Alucard]] did this to [[Literature/JeevesAndWooster Jeeves]] when he was mortally wounded in World War II, since he could not fall into the hands of the Nazis and Jeeves refused to be turned into a vampire. Officially, he's listed as MIA, presumed dead.
** Walter himself ended up mercy killed when he was brainwashed by [[spoiler: the I-Jin of Jeeves]] to work for Millennium. His brainwashing could be broken only temporarily, his choices were death or being forever binded to Integra. He chose death. [[spoiler: To make it even sadder, his own daughter had to do the deed.]]
* In ''TalesOfTheQuestor'', Quentyn's horse Ember has been gutted and had its back broken by a dragon, and cannot be saved, [[TearJerker only spared.]]
[[/folder]]

[[folder:Web Original]]
* ''SailorNothing'' combines this with [[spoiler:EnemyWithout. It doesn't work, however]] - Himei has come to believe that there's hope for her to have a life that ISN'T poor, nasty, brutish, and short after all, [[spoiler:and manages to muster the HeroicResolve necessary to activate her UnstoppableRage and kill her Yamiko.]]
* In ''SurvivalOfTheFittest'' version one, after having gotten separated from the Intrepid Six and tortured by Cody Jenson, Marcus Roddy finally stumbles across his group again at the river, and after some of his wounds have been treated he goes to rest while everyone else continues their business. However, unknown to them, he had been given a severe concussion, and eventually fell into a coma. After they notice that he had somehow slept through everything that had happened since his arrival, including a few gunfights, they check up on him and discover what has happened. This leads to some debate, but eventually Adam shoots him instead of leaving him to be eaten alive by animals.
** Another instance happens in version three, between Will and Christian. Christian had been severely wounded by Bobby Jacks earlier, and even though they escaped his injury became steadily worse over the time they spent travelling, and eventually a large rat-like creature appeared when they stopped to rest and attacked him, viciously tearing into the wound before Will kills it. Unable to take the pain any longer and knowing he's lost too much blood to survive even if the wound were treated, Christian asks Will to shoot him. He does.
** Further examples include Serenity Halos, who suffered a grievous gunshot wound at the hands of Blood Boy, which eventually got worse and worse until, when she finally was reunited with her boyfriend Steve Digaetano, she begged for him to kill her. And Jimmy Trejo, who was fatally wounded in a fight with Harry Tsai and asked for one of his travelling companions, Laeil Burbank, to kill him rather than let him die slowly and painfully. In V4, Adrian Staib begs Samantha Ridley to finish him off after he falls down a hill and paralyzes his arms and legs.
* ''TroperWorks/WarcraftDressing'' is infamous for frequent mercy kills. The Lich King is a bad, bad man.
* [[FateWorseThanDeath Many, many]] items contained by [[Wiki/SCPFoundation The Foundation]] can require this. In some cases, you can't even do that.
* [[http://akaichounokoe.deviantart.com/gallery/38542206#/art/Madgie-what-did-you-do-XIX-Mercenary-321179030?_sid=2d01623 Exactly what did Toki imprison herself in an underground safe-haven for?]] Well, needless to say, she's regretted it and says Madgie didn't give her a choice. Subverted, though, as Madgie is not explicitly mentioned as suffering, though if she was bleeding quite severely, so one would assume that she had been injured badly enough and was already dying, so what Toki regretted ever having to do had only quickened her death.
* The trope comes up more than once in ''Literature/{{Worm}}:''
** When Skitter sees [[BodyHorror what Bonesaw did to Grue]], Ballistic offers to kill him, but Skitter refuses, wanting to find some way to avoid it.
** At the end of Noelle's rampage, after Noelle has almost completely given in to her SuperpoweredEvilSide, the last thing Sundancer does before [[spoiler:returning to Earth Aleph]] is burn her to death with her sun.
** The protagonist herself shoots [[spoiler:Aster Anders]], a ''toddler'', to prevent her from suffering a FateWorseThanDeath at the hands of the Slaughterhouse Nine.
** Later, Contessa does this to [[spoiler:Khepri]], after her mind has degraded to the point that she can no longer think in terms that don't imply her planned conquest of all possible Earths, and she is briefly able to signal her approval through refusing Contessa's offer of help.
* WebVideo/TheNostalgiaCritic is on the ground, sobbing and begging for the Devil to kill him in ''SonOfTheMask''. Nothing ''painful'' is happening to him, mind you, he just wants out of life [[WebVideo/ToBoldlyFlee again]].
[[/folder]]

[[folder:Western Animation]]
* In the episode "Trouble in Lumpy Space" of ''WesternAnimation/AdventureTime'', there's a conversation where Finn thinks Jake (in the throes of the Lumps) is about to request this of Finn, should he go completely Lumpy. Yes. They actually got away with referencing this. It's never actually stated, and it turns out that Jake just wanted Finn to still be friends with a Lumpy Jake. "What did you think I was saying?"
* Ruthlessly parodied in ''WesternAnimation/{{Animaniacs}}'', when Yakko, Wakko and Dot have lassoed a [[NoCelebritiesWereHarmed Jerry Lewis-style]] comedian into filming their movie ''[[Film/OldYeller Old Screamer]]'', with the comedian playing the dog. When Yakko sadly explains that they have to put the dog out of his misery, Wakko seems sad for a moment, and then (Once Wakko has been given a puppy to replace Old Screamer), to the comedian's horror, cheerfully pulls out a HyperspaceMallet to do the job...
* Shayera does this for the resurrected (but now an EmptyShell) Solomon Grundy in a ''WesternAnimation/JusticeLeague Unlimited'' episode in what is one of the most [[TearJerker tear jerking]] scenes in the series.
-->'''Doctor Fate:''' [[AntiMagic Your mace]] may be the one object on Earth that can grant him peace.
-->'''John Stewart:''' What are you saying?
-->'''Shayera:''' Your favorite movie's Old Yeller, you know exactly what he's saying.
* Parodied in ''WesternAnimation/TheSimpsons'', where a flashback shows grade school-age Homer and Chief Wiggum playing Cops and Robbers; Homer, the robber, is wounded, and begs Wiggum for a Mercy Kill.
** And parodied again in one episode, where Homer - after a surgery - turned down the drink that Moe wanted to give to him. Barney immediately shouts "I can't stand to see him like that." and proceeds to (try to) [[VorpalPillow smother Homer with a pillow]]. (A ShoutOut to ''Film/OneFlewOverTheCuckoosNest'')
* In the first episode of ''WesternAnimation/TheVentureBrothers'', the latest Monarch henchman Speedy is caught in a chokehold by Brock Sampson as he is put into a temporary coma, since they can't get him to let go and that Speedy is suffering badly one of them performs a mercy kill on him by shooting him in the neck.
* The ''StarTrekTheAnimatedSeries'' episode, "Yesteryear," had this trope as the critical decision Spock as a child had to make concerning his mortally wounded pet, I-Chaya. When Spock decided that putting him down was the most humane and logical choice, that was the moment he embrace the traditional teachings of Surak of logic and emotional control.
[[/folder]]

[[folder:Real Life]]
* Captive bolts were designed to kill an animal with as little suffering as possible, but as the {{documentary}} ''{{Earthlings}}'' shows, it does not always work as intended.
* The original concept of ''CoupDeGrace'', French for "strike of mercy". Nowadays it just means [[FinishHim "finish off"]].
* The knightly short sword or dagger was called ''misericordia'' (Latin for "mercy") for exactly this reason. It was intended to give the ''CoupDeGrace'' for a mortally wounded soldier who would otherwise linger on his wounds in agony. It was thin enough to penetrate mail and go between the plates of an armour.
* There are examples and anecdotes from all over the world in everything from the aftermath of disasters to wars to hunting accidents. So this trope is very much TruthInTelevision.
* After the San Francisco Earthquake in 1906, a lot of wooden frame buildings had collapsed with people inside, and many [[KillItWithFire caught fire]] due to either broken gas mains, upturned stoves or furnaces, or some combination of the two. Many of the people trapped were pinned under debris, but the admittedly few first responders often didn't have the strength to drag them out before said fire could kill them. There are stories of people begging to be shot if they couldn't be freed. There is a story of at least one person who complied before the victim could burn to death, who then went immediately to the nearest police he could find to turn himself in. After listening to his story, the police told him he had done the right thing and let him go.
** Similarly, in the Alpatacal tragedy (a huge train crash in the Chilean/Argentinian border that killed several Chilean soldiers), there's the urban legend about a recruit who had survived the crash but found his friend badly injured ''and'' about to burn to death under the debris. The dying guy begged the other to shoot him dead with his service gun and spare him the upcoming FamilyUnfriendlyDeath, which the survivor did; then he turned himself, but was absolved by the military judges since the victim would've died anyway.
* In the aftermath of Hurricane Katrina, Memorial Hospital in New Orleans was surrounded by ten feet of water and did not have enough supplies to maintain their patients. Four of them were killed by hospital personnel and the District Attorney [[http://www.cbsnews.com/stories/2006/09/21/60minutes/main2030603.shtml charged them with Murder.]] Charges against the four were dropped by a grand jury.
* Standard practice for terminally-ill pets.
** Also for many large animals, especially horses, with broken or badly injured legs. A horse with a broken leg, even if given the best care known to veterinary medicine, is almost always better off euthanized.
* Self-inflicted during the [[http://en.wikipedia.org/wiki/Triangle_Shirtwaist_Factory_fire Triangle Shirtwaist Factory fire.]] The building caught on fire, trapping many workers on the top floor of the factory. The workers decided to jump to their deaths through the windows instead of being slowly burnt to death or suffocating from the smoke.
** Also done by people trapped in the burning World Trade Center on Sept. 11, 2001.
* A priest was being burnt at the stake because he didn't toe the state church line. The village woodcutter, who was loyal to the priest, split the priest's skull with an axe to spare him any further pain.
* Supposedly, when an older woman found out she had Alzheimer's, she asked her husband to do this if she ever went too far gone. One night, he went to the hospital she was in, shot her in the head, and waited for the police outside.
** There was also the sad case of Carol Carr. After watching her mother-in-law and husband succumb to Huntington's disease, she saw her two oldest sons develop it as well. She ended up killing them to spare them the pain. This led to controversy in the state of Georgia as to what to try her for...
* Much of the Terri Schiavo tragedy dealt with just how much this was the case.
* During the Spanish Inquisition, "heretics" who were condemned to burn at the stake would often, if they confessed, be strangled first to spare them the agony of death by fire and/or asphyxiation.
* That's how Magda and Joseph Goebbels saw [[OffingTheOffspring the killing of their six children]] during the last days of the Battle of Berlin in 1945.
* An American paratrooper during the Battle of the Bulge witnessed this first hand. Following a skirmish with a German squad, a great majority of the enemy soldiers surrendered, most of them wounded. However, the American's squad did not have the supplies, nor the manpower, to guard or feed the prisoners (like the Americans, the Germans were badly low on supplies and food, and it was was one of the reasons they surrendered, to get aid for their wounded.) Finally, the American squad leader grabbed a German machine pistol, gathered just enough ammo for it, and disposed of the rest of the weapons and ammo, telling the German squad leader (who spoke English) the cold hard truth that they could not take them prisoner, and that he was leaving the submachine gun behind for those who wanted to end it quickly. A few minutes after the Americans left, they began hearing single gunshots behind them.
* Battlefield medics and surgeons in the past were traditionally "unarmed" but usually allowed to carry pistols, both for self-defence and for taking care of those who were beyond any other help.
[[/folder]]

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