History Main / DeadlyDoctor

* ''Manga/RosarioToVampire'' has one of the hybrids posing as a nurse. She can control her victims with some kind of poison.

A Deadly Doctor, simply put, is someone who fights or kills with a medical motif. He uses his medical knowledge to injure, torture or kill, and uses [[ImprobableWeaponUser syringes, pills or surgical instruments]] or medical techniques to achieve his goals. He may wear his labcoat into battle as a BadassLongcoat. Note that in RealLife this would generally be considered a gross violation of medical ethics.

* Dr. Stanislav Sokurov in ''Anime/MarginalPrince''. While in the first few episodes he only seems to be somewhat [[LargeHam hammy]] and creepy (and [[MadDoctor crazy]]), it becomes clear over the course of the series that he's no ordinary doctor. Then the finale approaches and he goes to take out an entire beach of super-secret assassins. With, of course, a labcoat full of scalpels.

** [[TalkingAnimal Tony Tony Chopper]] isn't particularly malicious, so he usually uses his medical knowledge to fight through consuming a special medicine he made for himself called the Rumble Ball that improves his shapeshifting abilities. After the TimeSkip, he can use it to control himself in his [[AttackOfTheFiftyFootWhatever Monster Point]]. He's also used his knowledge of anatomy to point out how to break a zombie's spine, since it was already dead.

* ''Anime/{{Pokemon}}'': Dr. Proctor from the Indigo saga, who fought Team Rocket armed with nothing but a labcoat full of scalpels.

** Hush of the Franchise/{{Batman}} comics evolves into this after he drops the guntoting. ComicBook/TheScarecrow also counts, having been the head psychiatrist at Arkham.

* In [[PolishMedia Polish graphic novel]] "Żyjesz?" ("Alive?") a [[PlagueDoctor Plague Doctor]] stabs a tie-to-the-bed patient with the knife in the chest when he starts screaming. Another doctor get killed by his fellow medic after being bitten by a contain boy. During the climax of the book one more doctor is attack by armed lunatic and he just shots him in the face with a pistol.

* ''Film/AmericanMary'': After being raped by Dr. Grant, Mary has him kidnapped and then uses him to practice her body modification surgery on.
* Dr. Albert Hirsch from ''Film/TheBourneSeries'', responsible for creating and running of Treadstone/Blackbriar black ops projects where, via brainwashing, torture and behavioral conditioning they turned volunteers into tools ready to kill on command.

* Main villain of ''Film/TheDeadPit'' is an undead former surgeon of a mental hospital who with his zombies seeks out to remove everyones brains.
* The eponymous ''Film/DrGiggles'' uses typical doctor's equipment to kill his victims. This includes such things as syringes, an otoscope and a sphygmometer.

* Elle Driver disguised herself as a nurse in ''Film/KillBill'' in order to carry out a hit on The Bride with a poison syringe, only to have her mission cancelled by Bill himself. Since Elle despises the Bride, she does not take it well. The scene was based on a similar one from ''Film/BlackSunday'' – in that case it was successful.
* Dr. Christian Szell in ''Film/MarathonMan'', who uses his skill as a dentist to be an extremely competant TortureTechnician.

* One fight in ''Film/SherlockHolmes2009'' had ''Doctor'' Watson say "I'm a doctor" to the guy he has in a choke hold. He also looks better at fighting than Holmes is. Makes sense as Watson is a trained soldier, and Holmes only really gets amazing when he's had a chance to calm down and analyze his opponents carefully.

* Dr. Peter Brown, from ''Beat the Reaper.'' [[spoiler: He used to be a hitman. Now he's in witness protection.]]

* In ''Literature/TheFatherLukeWolfeTrilogy'', Dr. Brandt scratches Father Wolfe's wrist with a nicotine-filled syringe as a "reminder" to give his son a passing grade. He also threatens that worse than nicotine would have been an empty syringe, since a bubble of air in the bloodstream can jolt the heart into stopping. [[spoiler:It turns out this is how he murdered his colleague earlier.]]
* In Creator/AaronAllston's ''Literature/GalateaIn2D'', Medea was designed for this. She both designs the poison to use on Red, and its antidote. And it is Roger, not Medea, who has scruples about it.

* ''Literature/JoePickett'': Dr. Eric Logue in ''Trophy Hunt''. A former army surgeon, he was dishonorably discharged from the army and sent to a military prison for conducting unnecessary surgery on prisoners of war. Escaping, he travels the country posing as ufologist; attacking and dissecting people while they are still alive.
* In "Melanie and Merrick", Nurse Katie Heller, who has Manchausen Syndrome by Proxy, uses her medical knowledge of medicines to kill off patients, sometimes even swapping their prescribed medicine with a deadly substance. Her ultimate plan to kill off the Elephant Man fails heavily, and her ass is kicked hard by the hospital's scrubber, [[FieryRedhead Melanie Bell]]. Naturally, Katie is fired.

** In the original-canon story "The Adventure of the Dying Detective", the villain is an doctor who sends Holmes a package booby-trapped to infect him with a deadly disease. The trap fails, but Holmes lets him think it succeeded in order to lure him into [[EvilGloating gloating]] and [[EngineeredPublicConfession admitting his guilt]].

** Ton Phanan from the ''[[Literature/XWingSeries X-Wing]]'' series, who was a doctor before [[CyberneticsEatYourSoul cybernetics ate his future]] and he became a pilot-medic. At one point he cuts a man's throat using a laser scalpel, and notes that anything in his medical kit can be weaponized.

[[folder:Live Action TV]]

* Subverted in ''Series/BakuryuuSentaiAbaranger''. Dr. Yukito Sanjou/Abare Blue is a chiropractor who doesn't bring its expertise in battle, but when he actually does chiropracticing, it was ''extremely painful'' (though you'll feel better afterwards) that could make even battle-hardened veterans wince in pain. Then there's Dr. Mikoto Nakadai, who didn't quite bother bringing his medical expertise in battle or whatever, but considering his [[SuperSpeed battle]] [[HeroKiller capabilities]], and his [[ForTheEvulz motivation]]... he's deadly on his own.

* Series/{{Dexter}}'s first kill is of a homicidal nurse, who overdoses patients in her care that she considers to be in too much pain to keep living.
** For that matter, Dexter himself attended med-school before becoming a blood spatter analyst. This explains his surgical killing style and familiarity with anatomy and pharmacology.

* A MonsterOfTheWeek on ''Series/{{Charmed|1998}}'' is Doctor Williamson, and infectious disease specialist who had treated Piper when she was sick a few episodes earlier. He's a good guy, but when he accidentally injects himself with Piper's blood, he also gets her powers. Turns out mortal + powers = CRAZY. He goes on a killing spree and takes organs from people. [[spoiler: Piper eventually has to kill him to stop him, which she finds very hard to do, as he is the first human she ever killed, and he tried to save her life.]]

** Evil doctors also make appearance in several MythArc episodes. They have no scruples about performing horrible experiments on people. Often it's blurred whether it's aliens or the conspiracy. Or it might be both.

* ''TabletopGame/{{Eberron}}'''s House Jorasco focuses on healing (and, thanks to the power of their Dragonmark, has managed to severely cut down the temples' share of the magical healing market), meaning an adventuring Heir would have some aspects of this trope by default. The Jorasco prestige class added by the Dragonmarked sourcebook models a secret sect within Jorasco that turns their healing powers to the art of diseases (as in, ''causing'' them) and harm. Given that they have to be non-good, the best case scenario is an AntiHero.

* The Backstab Master in ''VideoGame/{{Arcanum|OfSteamWorksAndMagickObscura}}'' is a doctor who fled the city after stabbing a man to death with a pen. Unsurprisingly, the training he gives you involves medical expertise on most vulnerable parts of human (elf, dwarf etc.) body. [[ChronicBackstabbingDisorder What he does after training you is likewise no surprise.]]

* Dr. Litchi Faye-Ling in ''VideoGame/BlazBlue'' is another aversion. She's clearly a doctor and dedicated healer, but she never uses her medical knowledge for combat, usually fighting with telekinesis, chi control and martial arts... nor does she specifically target body parts for medical damage.

* The ''VideoGame/EtrianOdyssey'' series' Medics can be powerful front-line fighters, the exact opposite of their intended role as fragile healers. This requires very deliberate skill-tree set ups but is surprisingly practical.

** Doctor Baldhead from the first game was far less pleasant. After accidentally killing a patient, he went insane and became a serial killer, murdering under the delusion of healing. Then he met the ghost of his patient, and learned it wasn't his fault. He hid his face under a paper bag, became TheAtoner, and that's where Faust came from. (It's confirmed at several points in the series's Story Modes.)

* Healers in ''VideoGame/MakaiKingdom'' are usually {{Squishy Wizard}}s who can't fight, since the stats are against them and they have to put all their points in Resilience to be competent at healing. However, the Syringe is both a HealingShiv and a potent weapon which employs your Res stat to determine effect. Once your healer gets her hands on this weapon, they can quickly move from a back-row redundancy to a competent (if not top-tier) damage dealer. And they still can do healing.

-->"Have killed many people, Shepard. Many methods. Gunfire, knives, drugs, tech attacks. [[NoodleIncident Once with farming equipment.]] But not with medicine."

* ''Videogame/MurderInTheAlps'': Two of the murders committed in ''Deadly Snowstorm'' involve the victims being injected with acidic substance. This indicates that the murderer has medical experience. The culprit turns out to be [[spoiler:Christian Petersen's nurse Claudia Perret who's also a Nazi agent]].

** Ana Amari's biotic rifle is based off of Mercy's healing tech, although Ziegler herself disapproved of her technology being used in such a way. The rifle is a dart gun that shoots multiple types of vials, including both healing and damage darts (in-game, the rifle either heals or harms depending on if it hits an ally or an enemy).

* Traitor doctors in ''VideoGame/SpaceStation13'' can be this. They have access to all sorts of chemicals that can be used on their victims, preform "surgery" on them, unleash a deadly virus, or just leave them to die and lose the body.

* A large amount of modern {{M|assivelyMultiplayerOnlineRolePlayingGame}}MORPGs that have a [[WhiteMage healer class archetype]] will allow, to greater or lesser extent, the player to choose skills, stats and/or gear to make them more offensive than defensive. Whilst a viable tactic in most cases, there will always be fallout from the... "purists" who will [[StopHavingFunGuys insist that healers heal]] and that anyone not playing them straight is a {{Scrub}} and wasting the time of all concerned. Potentially the basis for realtime {{FlameWar}}s.

** This quote is inspired by the actual Literature/SherlockHolmes calling a doctor "who goes wrong" the "first of criminals" in "The Adventure of the Speckled Band".

** ''ComicBook/WonderWoman1942'': While Dr. Poison prefers her victims strapped down, she's perfectly willing and able to kill with her medical and chemistry knowledge no matter what state she encounters her victims in.

** Princess Remedy's attack on a grabbed opponent has her repeatedly stabbing the victim with a syringe.
** Frallan fights with scalpels to stab with, and medicine pills for ranged attacks.

* VideoGame/{{Princess Remedy|in a world of hurt}} becomes this in ''VideoGame/SlapCity''. Her attack on a grabbed opponent has her repeatedly stabbing the victim with a syringe.

* ''[[VideoGame/SuperSmashBrosMelee Super Smash Bros. Melee]]'', ''[[VideoGame/SuperSmashBrosForNintendo3DSAndWiiU Super Smash Bros. 4]]'' and ''[[VideoGame/SuperSmashBrosUltimate Super Smash Bros. Ultimate]]'' have Dr. Mario, who throws giant vitamin capsules as his standard special attack. One of his alternate costumes (the [[DarkIsEvil black one]]) is sometimes exaggerated as one of these in fanon.

* Dr. Muraki from ''[[Manga/DescendantsOfDarkness Descendants of Darkness]]''. In the first volume of the manga alone, he turns a dying girl into a vampire and controls her in order to kill people, captures a shinigami and tortures/basically tries to dissect him, and then faces off with Tsuzuki, known as the most powerful of the shinigami, breaking Tsuzuki's spine at one point [[spoiler: and escaping at the end of the book]]. His skill and knowledge as a medical doctor assist him in his various evil endeavors.

* Dr. Shamal from ''Manga/KatekyoHitmanReborn'' is a doctor/assassin who kills people by infecting them with terminal illnesses from his special mosquitoes.

* This trope is briefly referenced in ''FanFic/ChildOfTheStorm,'' speaking about [[MamaBear Branwen Hufflepuff]], ancestress of Helga, who was usually a very gentle and loving healer, but used her skills for the exact opposite when her daughter was assaulted, tortured, and killed by Frost Giants.

* [[BewareTheNiceOnes Haku]] in the ''Manga/{{Naruto}}'' fanfic FanFic/{{Hakumei}}. After apprenticing to a medic-nin for some years, his fighting style incorporates drugs and poisons, and while he doesn't ''like'' hurting people, he's ruthless when he has to be. His friends would say that he's the scariest member of their group.
* ''FanFic/WinterWar'' (a ''Manga/{{Bleach}}'' AU where [[TheBadGuyWins Aizen won the war]]) has Ogidou, a former Fourth Division member who fights by reversing healing kidou. For example, one of his attacks reopens old wounds that have scarred over. The other members of LaResistance let him do it, but find it disturbing. Hinamori, who's part of the same small group of fighters, refuses to let him heal her, even though she acknowledges that he's competent.

* ''VideoGame/{{Touhou}}'''s Eirin Yagokoro is often depicted as this by fans.

*** In more modern cases (from Legion to the time of writing in Shadowlands) the damage healers can do in Mythic+ dungeons is extremely important when it comes to the endgame.
There is also a whole spec that does most of it's healing by putting up shields and converting damage done to enemies to healing.

* ''TabletopGame/{{Eberron}}'''s House Jorasco focuses on healing (and, thanks to the power of their Dragonmark, has managed to severely cut down the temples' share of the magical healing market), meaning an adventuring Heir would have some aspects of this trope by default. The [[WikiMagic Jorasco prestige class added by the Dragonmarked sourcebook]] fits it even better, as it models a secret sect within Jorasco that turns their healing powers to the art of diseases (as in, ''causing'' them) and harm. Given that they have to be non-good, the best case scenario is an AntiHero.

* The manga, ''Manga/EliminateDangerousDoctors'' or EDD is basically this trope being hunted down by a secret agency (which itself may not be as well-intenioned as it may seem, making this a case of BlackAndGrayMorality with the unlucky only good doctor protagonist thrown into the situation).

** A little more subtle example earlier in the series is Haku, and thus, by extension, ninja that have ANBU training--though we don't see most of them really use it. He puts Zabuza into a fake death state with a thrown needle in order to trick Team 7. Later, in the bridge battle, he specifically only targets Sasuke in non-vital areas in an attempt to dissuade and not kill him. The obvious implication is that he could have gone for fatal shots from the start if he so chose.

** And Doc Q of the Blackbeard Pirates; When we first meet him, he's giving away apples…some of which ''explode'' when bitten, and later learn that his nickname is "Death God". During the Paramount War, he wields a SinisterScythe. All while being quite sickly himself.
** Then there's Trafalgar Law, also known as "[[RedBaron The Surgeon Of Death]]." Which is odd, to say the least, looking at him. He has the power of the Ope-Ope Fruit, which allows him to cut anyone or anything within a certain range and rearrange the pieces as he sees fit. People don't die when cut up this way, allowing him to extract organs, remove poison and even attach new body parts without putting the person in question at risk. Smoker even compares the power to that of being placed on an operating table.
*** It's worth noting that Law's Devil Fruit is unique because medical knowledge is actually ''required'' to be able to use it to it's utmost potential. Law's exceptionally rich background in the medical field is very evident, as he uses his abilities granted by the Ope-Ope Fruit to remove bullets from his own torso, discharge electricity from his hands like defibrillators, and then there's his most devastating technique 'Gamma Knife', which uses a conjured blade of screeching ''gamma radiation'' to reduce his victim's internal organs to sludge, leaving no visible evidence of trauma on their bodies.

** Stein, for that matter. The best teacher in the academy and a dangerous man, he can use his knowledge of soul wavelengths to disrupt others' attacks and empower his own. He also has vast experience both in efficiently cutting things apart and suturing them back together to cleanly heal - and ''both'' of these skills are weaponizable.

* ''Film/{{Predators}}'' has a doctor who landed with the other characters; no-one knows what he's doing there, among rebels, mercs, Spetznaz, Isreali military, a prisoner convicted of many rapes, a Yakuza etc. [[spoiler:He's actually a poison-obsessed murderer.]]

** [[LightIsNotGood Dazzle]], the Shadow Priest's descriptions say that there are very few spells his order of healers designed to harm - and even then not kill, but disable the foe. He can still unleash a lot of harm by [[ReversePolarity inverting their properties]].

* Skye's father in Series/AgentsOfSHIELD. He's a former volunteer for Doctors Without Borders, but after violently separated from his wife and daughter by Comicbook/{{HYDRA}}, his willingness to [[TheUnfettered go to any lengths]] to get his family back, combined with his experiments with a PsychoSerum has left him a little... [[AxCrazy unstable]].

* VideoGame/{{Princess Remedy|in a world of hurt}} becomes this in ''VideoGame/SlapCity''. Her attack on a grabbed opponent has her repeatedly stabbing the victim with a syringe.
* The Combine in ''VideoGame/HalfLife2'' are a very interesting example. Though their physical appearances have very little medical influence, they do use a lot of medical jargon in reference to military operations. Enemies are referred to as "vectors", "contamination" or an "infestation", and soldiers undergo "containment" procedures to "coagulate" or "sterilise" them. This clinical language helps to reinforce their robotic, stoic behavior.
* In ''Videogame/DarkestDungeon'', the PlagueDoctor class is a university-trained doctor who can use her training to heal their allies in combat and while camping, but she is also a MadScientist whose strongest utility is in using her medical knowledge to concoct various drugs and poisons to strengthen her allies, stun enemies, and deal devastating DamageOverTime effects to enemies.
* ''Videogame/MurderInTheAlps'': Two of the murders committed in ''Deadly Snowstorm'' involve the victims being injected with acidic substance. This indicates that the murderer has medical experience. The culprit turns out to be [[spoiler:Christian Petersen's nurse Claudia Perret who's also a Nazi agent]].

* ''Webcomic/{{Archipelago}}'' gives us Captain Snow, who once apparently practiced as a doctor. Morally questionable procedures cost him his license, and now, he uses his anatomical knowledge primarily for torture.

* ''Wiki/SCPFoundation'': [[http://www.scp-wiki.net/scp-049 SCP-049]], "The PlagueDoctor", believes that he's "curing" the Plague by killing people and turning them into zombies, unwilling to entertain any notion that the disease has not been a threat for a long time. At least, the Foundation ''assumes'' he's talking about the Plague...
* Doctor Locklear in the Doctor Locklear series. He uses his surgical knowledge to torture and then kill people accused of crimes who were released or ruled not guilty. He also used it to kill the night nurse checking on him in Good Doctor Locklear.

* Mordin Solus from ''VideoGame/MassEffect2'' averts the trope. He's an extremely skilled doctor as well as a complete badass, but he'd '''never''' kill anyone with medicine. Nonetheless, while people are thankful for his medicinal work, the fact that he takes lives as easily as he saves them utterly terrifies more than a few who know of him.
** Played with; the fact that [[spoiler:he was part of the STG team that developed and deployed the second version of the genophage]] gnaws his conscience hard. He tries hard to justify his actions, but [[spoiler:millions of unborn krogan children and the cultural and emotional heavy decay the krogan, as a race, suffer]] are a heavy burden to carry, as Maelon wisely points. And it's a major plot point on his character development.
-->"Have killed many people, Shepard. Many methods. Gunfire, knives, drugs, tech attacks. [[NoodleIncident Once with farming equipment.]] But not with medicine."
-->"Many ways to help people. Sometimes cure patients. Sometimes execute dangerous individuals. Either way helps."
* ''VideoGame/{{Touhou}}'''s Eirin Yagokoro is often depicted as this by fans.

* The ''VideoGame/EtrianOdyssey'' series' Medics can be powerful front-line fighters, the exact opposite of their intended role as fragile healers. This requires very deliberate skill-tree set ups but is surprisingly practical.
** In addition, both of the healing classes in ''Etrian Odyssey III'', the Prince(ss) and the Monk, have fairly potent combat ability, especially the Monk, and ''especially'' once you unlock subclassing.
* The Doctor from ''VideoGame/AssassinsCreedBrotherhood'' is ExactlyWhatItSaysOnTheTin. As the official description puts it:
--> "He has assassinated more patients than he has saved, poisoned more targets than he has cured. [[WhiteMaskOfDoom No one has ever seen the real face of the Doctor…]] and he uses his deadly Syringe to make sure it stays that way."
::Pretty much every game of Assassins Creed Multiplayer has at least one example.
* ''VideoGame/LeagueOfLegends'' has three of these as optional skins for the ninjas: Nurse Akali, Surgeon Shen, and Kennen M.D.
** [[MadDoctor Dr. Mundo]] [[InvertedTrope inverts this]], as he's a [[HulkSpeak hulking brute]] with no immediate indication of being a doctor beyond his name. In spite of this, he's actually [[BunnyEarsLawyer quite brilliant]] in his line of work (that being a SerialKiller who experiments on his victims).
* ''VideoGame/DefenseOfTheAncients'' has Zharvakko, the WitchDoctor. While he's a very potent healer, his primary means of helping the team is using the same knowledge to conjure stunning projectiles and drastically amplify the damage dealt to enemies.
** [[LightIsNotGood Dazzle]], the Shadow Priest's descriptions say that there are very few spells his order of healers designed to harm - and even then not kill, but disable the foe. He can still unleash a lot of harm by [[ReversePolarity inverting their properties]].
* Dr. Litchi Faye-Ling in ''VideoGame/BlazBlue'' is another aversion. She's clearly a doctor and dedicated healer, but she never uses her medical knowledge for combat, usually fighting with telekinesis, chi control and martial arts... nor does she specifically target body parts for medical damage.
* ''VisualNovel/HatofulBoyfriend'' has Dr. Iwamine Shuu, the school doctor at St. [=PigeoNation's=] School. He's extremely shady, and there are rumors that he's a serial killer and that students who visit him can end up as meat in the cafeteria and quill pens in the gift shop. [[spoiler:The rumors are more or less true. He is so deadly that if he finds you interesting, he may [[ALoveToDismember cut off your head]] to keep it preserved in a jar, and possibly also study your insides ''[[ILoveTheDead most intimately]]'' once he's done with your pretty head... and in one route, he outright tries to ''commit genocide''.]]
* ''VideoGame/{{Skullgirls}}'' has Valentine, who fights with medical equipment such as bonesaws, syringes, IV stands, and more.
* You could consider Shadow [[spoiler:Naoto]] from ''VideoGame/{{Persona 4}}'' this. After all, [[spoiler:she was going to medically change Naoto's gender]]. That said, [[spoiler:she]]'s also a bit of an aversion. [[spoiler:She]] fights with the usual magic powers and technology, no real use of any sort of medical knowledge.
* The third boss of ''VideoGame/PersonaQShadowOfTheLabyrinth'' is the Kind Doctor, a giant deformed surgeon that [[ObliviouslyEvil believes]] he's performing life-saving surgery, not attacking the heroes. He's backed up by two nurses that respectively buff his offenses and defenses. [[spoiler:He is later revealed to be a manifestation of a deceased character's memory of the doctor who presided over the surgery in which they died.]]
* ''VideoGame/KeithCourageInAlphaZones'' has the enemy Dr. Sting, who flies through the air and throws syringes.
* Doc Mercy in ''VideoGame/{{Borderlands 2}}'' is a twisted, psychotic bandit doctor. His powerful laser gun doesn't follow a medical motif, but he uses a hospital sign as a shield and throws grenades that hurt others while healing him. Somehow, unlike his good guy rival Dr. Zed, he actually has both a medical degree and a medical license.
* [[VideoGameCrueltyPotential Very easy]] to be one of these in the surgery simulator ''VideoGame/LifeAndDeath''.
* Evil doctors are among the enemy types in ''VideoGame/SwordOfTheStars: The Pit''.
* Medic's Resonators in ''VideoGame/WildStar'' are useful for reconstructing and regenerating tissue and bone. They can also be super-charged to emit unsafe levels of radiation that can liquefy said tissue and bone. As Ish'mael the Bloodied said,
--> I used to scream "Medic!" with hope rather than terror. I may be a pirate but in some way I feel like I've lost my innocence.
* ''VideoGame/BravelyDefault'' shows us a magical version of this: the first White Mage you fight (and steal the powers from) is a torture specialist who uses her healing powers to keep her torture victims alive long past the point where they would have died normally.
* One psychopath in ''VideoGame/DeadRising3'' is a doctor who uses the zombie outbreaks as a way to harvest organs for a huge markup on the black market. Nick spends most of the fight drugged up from his injections and you have to turn them against him for the most damage. He also has one of the most disturbing deaths in the game.
* Traitor doctors in VideoGame/SpaceStation13 can be this. They have access to all sorts of chemicals that can be used on their victims, preform "surgery" on them, unleash a deadly virus, or just leave them to die and lose the body.
* Healers in ''VideoGame/MakaiKingdom'' are usually {{Squishy Wizard}}s who can't fight, since the stats are against them and they have to put all their points in Resilience to be competent at healing. However, the Syringe is both a HealingShiv and a potent weapon which employs your Res stat to determine effect. Once your healer gets her hands on this weapon, they can quickly move from a back-row redundancy to a competent (if not top-tier) damage dealer. And they still can do healing.
* Dr. Maddiman from ''VideoGame/YokaiWatch''. He was a hospital director that experimented on his patients when he was alive and now, as a yo-kai, uses his abandoned hospital as a front to steal hearts from unsuspecting victims. In his boss battle, he wields surgical scalpels in his left hand as makeshift claws, throws bottles of medicine to poison your entire team, and uses an IV drip attached to his exposed heart to heal himself.
** The third game in the series introduces Prof. Zero (known as Dr. E. Raser in western Wibble Wobble) and his PaletteSwap Dr. Kagemura [[spoiler:who was the son of Dr. Maddiman according to a sidequest]]. Both Yo-kai have a skill (though it's more evident in the latter, called Evil Medicine) which decreases the HP of their opponents gradually, and their Soultimates sprays poison on the opponents' field to cripple them when they move there.
* ''VideoGame/KirbyPlanetRobobot'' introduces the Doctor ability for Kirby, which gives him the ability to throw large vitamins at his enemies, along with attacking/shielding with a giant clipboard and brewing randomized elemental potions he can unleash on the enemy.
* ''VideoGame/DeadByDaylight'' has not one, but two of these.
** First is The Nurse. Once an impoverished young widow who took up a job at an asylum to make ends meet, she spent 20 years being physically and verbally abused before her mind eventually snapped, and she committed a mass slaughter of patients and staff. Now she exists in a nightmare dreamscape, spending all eternity slaughtering and sacrificing unfortunate victims for the Entity.
** Then there's the aptly named killer The Doctor. Unlike The Nurse, Herman Carter was one of these before he became a servant of the Entity. A psychopath working for an off-board CIA mind control program. People would beg and plead to not be sent to his office.
* Among the cast of twisted enemies in ''VideoGame/CarnEvil'' are deranged MonsterClown doctors (named "Dr. Klot") who attack with surgical saws, drills, and syringes. They appear during the final level, in which the BigBad, Professor Ludwig von Tökkentäkker, instructs them to extract the player's brain and put it into the Great Ape, a gorilla with guns for hands. Dr. Klot's voice clips can be found [[https://www.youtube.com/watch?v=wh7OGKJtiCI&feature=youtu.be here.]]
-->'''Dr. Klot''': "Your brain...in a giant ape! I'M A GENIUS!"
* ''VideoGame/{{Overwatch}}'': Another aversion is Dr. Angela Ziegler a.k.a. Mercy, Overwatch's chief medical officer. Though her primary abilities involve healing, boosting, or resurrecting her teammates, she also carries a pistol should she need to [[CombatMedic dish out damage]]. She cannot use any of her "doctoring abilities" to harm her enemies.
** However, Mercy's EvilCounterpart is a straight example of this trope. Moira O'Deorain, formerly of Overwatch's Blackwatch division, uses the setting's healing technology (biotics) to suck the life out of her enemies. She is responsible for giving the wraith-like Reaper his abilities and now works for the terrorist organization Talon, where she can continue her experiments unfettered "by law, by morality, and by fear." Her character design is highly reminiscent of an evil witch, contrasting Mercy's angelic design.
** Ana Amari's biotic rifle is based off of Mercy's healing tech, although Ziegler herself disapproved of her technology being used in such a way. The rifle is a dart gun that shoots multiple types of vials, including both healing and damage darts (in-game, the rifle either heals or harms depending on if it hits an ally or an enemy).
** Baptiste is an ex-Talon mercenary-turned-combat-medic with powerful healing, boosting, and invincibility tech, as well as pulse rifle. Although his time in Talon taught him how to be dangerous and effective, he has reformed and is trying to save lives.
* Using her syringe-arm and medical expertise of various diseases in battle, Beatrix from ''VideoGame/{{Battleborn}}'' is quite the badass of a deadly doctor.
* ''VideoGame/{{Tenchu}} 3: Wrath of Heaven'' introduced a new character named Tesshu who operated as a doctor by day and vigilante assassin for hire by night, making extensive use of his medical knowledge to make him a more effective killer.
* In ''VideoGame/TownOfSalem'', the Plaguebearer's lore is that he was a doctor who became fascinated with the effects of the plague, and now seeks to infect the entire town.

* The infamous Dr. Hannibal Lecter, created by Thomas Harris befits this incredulously. Other than application of his medical knowledge to terrorize and torture his victims, he also uses this to hunt, when it's not humans. Methods of torture inclusive of anaesthetization, and skull trepaning for death realization with the doctor in sight.
* ''Implant'' by Paul F. Wilson provides Dr.Duncan Lathram. A disgruntled physician done wrong by the helms men of the medical profession. [[spoiler:His vengeance is a harmful concoction embedded in the kakistocracy's bodies once they seek his face lifting and beautification surgeries.]]
* ''Literature/JoePickett'': Dr. Eric Logue in ''Trophy Hunt''. A former army surgeon, he was dishonorably discharged from the army and sent to a military prison for conducting unnecessary surgery on prisoners of war. Escaping, he travels the country posing as ufologist; attacking and dissecting people while they are still alive.

* ''Franchise/StarTrek'':
** In Seska's reprogrammed version of ''Series/StarTrekVoyager'', the holographic doctor loves to hurt people instead of healing them. It can inject you with acid instead of medicine.
** In the ''[[Recap/StarTrekS2E4MirrorMirror Mirror, Mirror]]'' MirrorUniverse, ''Series/{{Star Trek|The Original Series}}'' doctors get rather upset when they find out what their {{evil counterpart}}s do in that universe.
** Same MirrorUniverse, different series: in the ''Series/StarTrekEnterprise'' episode "In a Mirror, Darkly" we see Mirror!Phlox smiling cheerfully... while torturing an alien.
** Vidiians in ''Series/StarTrekVoyager'' are an entire race of these, using their medical knowledge to steal organs to ensure their own survival. Their weapons double as medical devices.
* A MonsterOfTheWeek on ''Series/{{Charmed|1998}}'' is Doctor Williamson, and infectious disease specialist who had treated Piper when she was sick a few episodes earlier. He's a good guy, but when he accidentally injects himself with Piper's blood, he also gets her powers. Turns out mortal + powers = CRAZY. He goes on a killing spree and takes organs from people. [[spoiler: Piper eventually has to kill him to stop him, which she finds very hard to do, as he is the first human she ever killed, and he tried to save her life.]]

* On ''Series/{{Supernatural}}'', one MonsterOfTheWeek was a doctor who had managed to make himself immortal and was taking other people's organs when his gave out.
* More than one episode of ''Series/LawAndOrder'' has featured doctors who killed patients deliberately (many more have featured doctors who killed by negligence).
* ''Series/FridayThe13thTheSeries'' featured two doctors who had cursed antiques (a scalpel and a Native American shamanic rattle) that could heal people... as long as they were first used to kill.

* This trope makes up the plot of ''Series/TheXFiles'' episode "Sanguinarium".
** Evil doctors also make appearance in several MythArc episodes. They have no scruples about performing horrible experiments on people. Often it's blurred whether it's aliens or the conspiracy. Or it might be both.
* Subverted in ''Series/BakuryuuSentaiAbaranger''. Dr. Yukito Sanjou/Abare Blue is a chiropractor who doesn't bring its expertise in battle, but when he actually does chiropracticing, it was ''extremely painful'' (though you'll feel better afterwards) that could make even battle-hardened veterans wince in pain. Then there's Dr. Mikoto Nakadai, who didn't quite bother bringing his medical expertise in battle or whatever, but considering his [[SuperSpeed battle]] [[HeroKiller capabilities]], and his [[ForTheEvulz motivation]]... he's deadly on his own.
%% * [[Series/DoctorWho The Doctor]]. The Oncoming Storm, the Bringer of Darkness, the only person to scare man-eating shadows, killer snowmen, and Daleks alike.

* ''Series/{{CSI}}'''s Doctor Jekyll. He used surgical means to kill his victims, like the guy who got an infected appendix sewn into him.
* The Surgeon, a SerialKiller on ''Series/RizzoliAndIsles''.

* ''{{Series/Highlander}}'' had a villain of the week who was a slightly mentally unstable doctor who got fixated on Duncan after he witnessed evidence of his immortality. He'd been kidnapping and experimenting on other patients before that as well.
* On ''Series/AmericanHorrorStoryAsylum'', it's revealed that Bloody Face's victims were killed with surgical precision. That's because [[spoiler: Bloody Face is really Dr. Oliver Thredson. As a psychiatrist and licensed doctor, he would have had the surgical training necessary to commit his crimes]].
* [[AnIcePerson Killer Frost]] in ''Series/TheFlash2014'', as she's [[spoiler: the SuperPoweredEvilSide of Dr. Caitlin Snow, the team's [[TheMedic medic]]]]. In the episode [[Recap/TheFlash2014S3E7KillerFrost "Killer Frost"]], she uses her anatomical knowledge to sever [[Franchise/TheFlash The Flash's]] leg muscles so she can escape him.
* Skye's father in Series/AgentsOfSHIELD. He's a former volunteer for Doctors Without Borders, but after violently separated from his wife and daughter by Comicbook/{{HYDRA}}, his willingness to [[TheUnfettered go to any lengths]] to get his family back, combined with his experiments with a PsychoSerum has left him a little... [[AxCrazy unstable]].

* TabletopGame/{{Eberron}}'s House Jorasco focuses on healing (and, thanks to the power of their Dragonmark, has managed to severely cut down the temples' share of the magical healing market), meaning an adventuring Heir would have some aspects of this trope by default. The [[WikiMagic Jorasco prestige class added by the Dragonmarked sourcebook]] fits it even better, as it models a secret sect within Jorasco that turns their healing powers to the art of diseases (as in, ''causing'' them) and harm. Given that they have to be non-good, the best case scenario is an AntiHero.
* Surprisingly subverted by Yawgmoth in ''TabletopGame/MagicTheGathering''. Despite being the BigBad, he was a very skilled doctor and, even if his cure for phthisis wasn't seen well, it actually worked. Even when he started adding massive doses of BodyHorror, his target was always to ''improve'' his patients, not to murder them.
* The Doctor career archetype in ''TabletopGame/HunterTheVigil''.

* The Medic in ''TabletopGame/FengShui'' can be one of these quite easily, though most tend toward the CombatMedic archetype.
* If you thought you least wanted a Cryxian necrosurgeon to get you in ''TabletopGame/{{Warmachine}}'', wait until you meet the Cephalyx. Goodbye mind.

* In ''VideoGame/KnightsOfTheOldRepublic'', the Heal Force power is closely related to the Wound power. Every Jedi in both games can end up with both.
* The Medic in ''VideoGame/TeamFortress2'' can be pretty deadly with the bone saw if you can get close enough. Or his ''syringe gun''.
** He's got decent, self-regenerating health, a good running speed, has an alternate syringe gun that drains health, can heal at range, [[LimitBreak make his healing target and himself invulnerable]], and has [[http://wiki.teamfortress.com/wiki/Ubersaw this]] as his alternate bonesaw. Even his backstory as a psychotic MadScientist fits the bill. And then there's his TFC equivalent, who was more or less a full combat class with the ability to heal people.
** To drive the point home, [[HypocriticalHumor one of his melee weapons is a bust of Hippocrates' head with a "Do No Harm" plaque]]. Which he uses to beat people to death with.
*** It explains a lot about his personality and style that he was trained in medicine [[UsefulNotes/NaziGermany in a time and place]] where the Hippocratic oath was downgraded to a ''Hippocratic suggestion''. And an ''optional'' Hippocratic suggestion at that.

* Faust of ''VideoGame/GuiltyGear'' fame is a 9-foot-tall doctor who wields a scalpel as big as he is. Bonus points in that he actually ''heals'' people as well as kick ass, and kicks ass in order to stop people from getting hurt in the first place. Now that's what ''I'' call, aggressive vaccination.
** Doctor Baldhead from the first game was far less pleasant. After accidentally killing a patient, he went insane and became a serial killer, murdering under the delusion of healing. Then he met the ghost of his patient, and learned it wasn't his fault. He hid his face under a paper bag, became TheAtoner, and that's where Faust came from. (It's confirmed at several points in the series's Story Modes.)
* Kyoko Minazuki from the ''VideoGame/RivalSchools'' series, who serves as a school nurse when she's not cracking skulls.
* ''VideoGame/ViewtifulJoe'' has nurse EliteMooks with giant needles or scalpels.

* Dr. Vahzilok from ''VideoGame/CityOfHeroes'', who uses his modern scientific equipment to conduct strange, ''forbidden'' experiments... on himself as well as others.
** Plenty of player characters as well, with the Pain Manipulation power set being very well suited for it thematically.
* The "Dr. Grossman" enemy model from ''VideoGame/{{BioShock|1}}'', severely [[TerrifiedOfGerms germophobic]] surgeons who scream about you being covered in filth and germs as they shoot you, rattle off medical jargon, and bark orders at a nonexistent nurse. Like all the other enemies in the game, they've all been driven quite insane due to overexposure to the local [[AppliedPhlebotinum phlebotinum]]. And then there's their KingMook, Dr. Steinman, a plastic surgeon who also fancies himself a MadArtist, using plastic surgery as his medium. His biggest inspiration and influence? ''[[BodyHorror Pablo]] [[FacialHorror Picasso]]''.
-->'''Steinman:''' When Picasso became bored of painting people, he started representing them as cubes and other abstract forms. The world called him a ''genius''! I've spent my entire surgical career creating the same tired shapes, over and over again: the upturned nose, the cleft chin, the ample bosom. Wouldn't it be ''wonderful'' if I could do with a knife what that old Spaniard did with a brush?

* The Backstab Master in ''VideoGame/{{Arcanum|OfSteamWorksAndMagickObscura}}'' is a doctor who fled the city after stabbing a man to death with a pen. Unsurprisingly, the training he gives you involves medical expertise on most vulnerable parts of human (elf, dwarf etc.) body. [[ChronicBackstabbingDisorder What he does after training you is likewise no surprise.]]
* Dr. Redmoor of ''VideoGame/DementiumTheWard'', who also has traces of MadScientist.
* In the ''VideoGame/{{Fallout}}'' games, there is a perk (Living Anatomy) which gives you a bonus to medical skills, but also, due to your mastery of anatomy, raises your base damage against living opponents.
** More of an example being your Father in ''VideoGame/{{Fallout 3}}'': He just, ''on a whim'', decides to escape a secure vault, cross the wasteland from one side to the other with no companions (a feat replicated only by your stupidly powerful character) and no armament except a ''hunting rifle''. He then proceeds to enter and leave a super-mutant infested building (unwounded!) and then a mind-control simulation pod before he [[spoiler: calmly sacrifices himself in an attempt to wipe out the leader of the Enclave assault on the Capital Wasteland.]] He is a badass doctor like no other.

* The manga, ''Eliminate Dangerous Doctors'' or EDD is basically this trope being hunted down by a secret agency (which itself may not be as well-intenioned as it may seem, making this a case of BlackAndGrayMorality with the unlucky only good doctor protagonist thrown into the situation).

** It's should b noted that all the doctors in the book are mysterious and scary figures and we never see their faces.

* [[BewareTheNiceOnes Haku]] in the ''Manga/{{Naruto}}'' fanfic FanFic/{{Hakumei}}. After apprenticing to a medic-nin for some years, his fighting style incorporates drugs and poisons, and while he doesn't ''like'' hurting people, he's ruthless when he has to be. His friends would say that he's the scariest member of their group.
* ''FanFic/WinterWar'' (a ''Manga/{{Bleach}}'' AU where [[TheBadGuyWins Aizen won the war]]) has Ogidou, a former Fourth Division member who fights by reversing healing kidou. For example, one of his attacks reopens old wounds that have scarred over. The other members of LaResistance let him do it, but find it disturbing. Hinamori, who's part of the same small group of fighters, refuses to let him heal her, even though she acknowledges that he's competent.
* Though Dr. Watson is definitely a MartialMedic, he plays the Deadly Doctor trope [[BewareTheNiceOnes frighteningly straight]] in the ''Fanfic/DeliverUsFromEvilSeries''.
** ''"If your master's actions destroy him whom I regard as-as the best and wisest man I have ever known-make no mistake that I shall hunt down, to a man, everyone who played a part in his destruction."''

* ''Film/{{Ghostbusters 1984}}'': Egon Spengler states that Ivo Shandor, also the architect behind ''that'' building, was one of these due to unnecessary surgeries.
* ''Film/TransformersRevengeOfTheFallen'' features the Doctor, a tiny Decepticon surgeon charged with planting mind probes in victims.

%%* Creator/MelBrooks' character in ''Film/TheMuppetMovie''.
%%* Dr. Christian Szell in ''Film/MarathonMan''
* Dr. Albert Hirsch from ''Film/TheBourneSeries'', responsible for creating and running of Treadstone/Blackbriar black ops projects where, via brainwashing, torture and behavioral conditioning they turned volunteers into tools ready to kill on command.

* Main villain of ''Film/TheDeadPit'' is an undead former surgeon of a mental hospital who with his zombies seeks out to remove everyones brains.
* ''Film/EscapeFromLA'' gives us the Surgeon General, played by a wonderfully [[LargeHam hammy]] Creator/BruceCampbell.
* The eponymous ''Film/DrGiggles'' uses typical doctor's equipment to kill his victims. This includes such things as syringes, an otoscope and a sphygmometer.
* ''Film/ReturnToHouseOnHauntedHill'' has the ever-so-evil Dr. Vannacutt.

* The Stitch class of psychics in ''{{Film/Push}}'' are nominally healers (and damn good ones at that). They can completely heal bones and the like by laying their hands on a person. However, they can easily use their medical powers to ''break'' bones and stir up a person's insides as well. God forbid a malevolent Stitch gets their hands on you...
* In ''Film/PansLabyrinth'', the doctor [[spoiler: who secretly helps the rebels]] is a non-combatant. However, at one point, he applies his medical knowledge to [[spoiler: mercy-kill a captured rebel after being called to keep him alive for more torture]].
* ''Film/ButtAtlas'': Henry Goose, though [[spoiler:Ewing eventually doubts that he was anything more than a murderous confidence trickster]].
* ''Film/AmericanMary'': After being raped by Dr. Grant, Mary has him kidnapped and then uses him to practice her boy modification surgery on.
* ''Film/{{Predators}}'' has a doctor who landed with the other characters; no-one knows what he's doing there, among rebels, mercs, Spetznaz, Isreali military, a prisoner convicted of many rapes, a Yakuza etc. [[spoiler:He's actually a poison-obsessed murderer.]]

* Annie Wilkes in Creator/StephenKing's ''{{Literature/Misery}}''.

* The ''Literature/HeraldsOfValdemar'' series once states that the same Healers who can stop the pain and put you together also know how to take you apart, so it's unwise to anger them.
* Doc Dorden from ''GauntsGhosts'' doesn't let being a pacifist stop him from knocking out unruly patients with precision artery-pinches "only an Imperial assassin or a brilliant medic could achieve".
* In the ''Franchise/SherlockHolmes'' short story "Literature/AStudyInEmerald" by Creator/NeilGaiman, the Great Detective remarks, concerning his deduced perpetrator of a brutal murder, "[I]t is my experience that when a Doctor goes to the bad, he is a fouler and darker creature than the worst cut-throat." [[spoiler: Of course, the reader is more likely to agree with Dr. Watson on the rightness of his actions, making this a subversion.]]
** This quote is inspired by the actual Literature/SherlockHolmes calling a doctor "who goes wrong" the "first of criminals" in "The Adventure of the Speckled Band".
** In the original-canon story "The Adventure of the Dying Detective", the villain is an doctor who sends Holmes a package booby-trapped to infect him with a deadly disease. The trap fails, but Holmes lets him think it succeeded in order to lure him into [[EvilGloating gloating]] and [[EngineeredPublicConfession admitting his guilt]].
* "Dr. Danco", who slices and dices his victims, in ''[[Series/{{Dexter}} Dearly Devoted Dexter]]''.
* In "Melanie and Merrick", Nurse Katie Heller, who has Manchausen Syndrome by Proxy, uses her medical knowledge of medicines to kill off patients, sometimes even swapping their prescribed medicine with a deadly substance. Her ultimate plan to kill off the Elephant Man fails heavily, and her ass is kicked hard by the hospital's scrubber, [[FieryRedhead Melanie Bell]]. Naturally, Katie is fired.
* In Literature/TheFatherLukeWolfeTrilogy, Dr. Brandt scratches Father Wolfe's wrist with a nicotine-filled syringe as a "reminder" to give his son a passing grade. He also threatens that worse than nicotine would have been an empty syringe, since a bubble of air in the bloodstream can jolt the heart into stopping. [[spoiler:It turns out this is how he murdered his colleague earlier.]]
* In Creator/AaronAllston's ''Literature/GalateaIn2D'', Medea was designed for this. She both designs the poison to use on Red, and its antidote. And it is Roger, not Medea, who has scruples about it.

* Dr. Peter Brown, from ''Beat the Reaper.'' [[spoiler: He used to be a hitman. Now he's in witness protection.]]
* In ''Literature/DocSidhe'', Alastair explains that his world's equivalent of the Hippocratic Oath only applies to his patients -- and the guys he shoots aren't patients until ''after'' he shoots them.
* In ''Literature/TheGolgothaSeries'', Golgotha has bad luck in this regard with their doctors. Their current doctor, Dr. Francis Tumblety, is a racist and sexist quack who is only tolerated because the town's previous two doctors turned out to be murderous monsters. His predecessor was a monster which [[TakenForGranite turned people to stone]] and drank their memories, and the one before that was some sort of creature which had to be staked through the liver and buried under the railway tracks. [[spoiler:And Dr. Tumblety ends up continuing the streak, as he turns out to be Jack the Ripper]].

* ''Film/Predators'' has a doctor who landed with the other characters; no-one knows what he's doing there, among rebels, mercs, Spetznaz, Isreali military, a prisoner convicted of many rapes, a Yakuza etc. [[spoiler:He's actually a poison-obsessed murderer.]]

* ''Film/Predators'' has a doctor who landed with the other characters; no-one knows what he's doing there, among rebels, mercs, Spetznaz, Isreali military, a prisoner convicted of many rapes, a Yakuza etc. [[spoiler:He's actually a poison-obsessed murderer.]]

* The [[OurOrcsAreDifferent Orks]] of ''TabletopGame/{{Warhammer 40000}}'' have "Mad Doks" or "Painboyz" to keep the lads on their feet during battles, and who occasionally put their bonesaws and "'Urty Syringes" to offensive use (the latter is an actual piece of wargear that does poisoned attacks). Since the specialists in question are [[MadScientist mad scientist-esque]] physicians with an instinctive (if imprecise) grasp of medicine and an urge to "tinker," they count as Deadly Doks ''off'' the battlefield, too.
** The main job of SpaceMarine Apothecary is to keep their battle-brothers alive and collect the gene-seed of the dead, but being an 8-foot-tall genetically enhanced {{Super Soldier}}s in PoweredArmor, they can and will kick ass if necessary. Not to mention that using the gene-seed extractor on a living person is going to hurt.

** Mad Dok Grotsnik, the most famous of all Painboyz, is also the deadliest of all. Far smarter than the average Ork, he's always in the [[strike:ranger's]] Nobz' [[strike:hair]] heads, or rather he puts [[ExplosiveLeash remote detonated bombs]] [[YourHeadAsplode inside their heads]] just in case they try anything funny.
** Haemonculi, the Dark Eldar's medical scientists (i.e. {{Torture Technician}}s), also tend to wear combat gear heavily inspired by labcoats and surgical scrubs. Sometimes that's made of GenuineHumanHide too.