Note that while we've tried to keep all spoilers marked, due to the nature of the show it's very difficult to keep everything hidden, and it's quite possible that by merely looking at this page at all you will spoil yourself, especially due to the WalkingSpoiler nature of certain characters. You have been warned.


!!Main Characters

[[folder:Sherlock Holmes]]
[[caption-width-right:250:''"I am smarter than everyone I meet."'']]
->'''Played by''': Creator/JonnyLeeMiller

->'''Watson''': ''You know, for a genius you can be a real nimrod.''

A UsefulNotes/{{London}}er from a wealthy family, fresh out of rehab, who tries to go back to work as a consultant detective in UsefulNotes/NewYorkCity after a trauma in his past.
* AbledInTheAdaptation: Inverted twice:
** Sherlock's drug usage from the books is referenced and is in fact a major part of his character. At the start of the series he's recovering from heroin addiction. Joan starts out as his Sober Companion.
** Sherlock ends up diagnosed with [[spoiler:a traumatic brain injury, Post-concussion syndrome to be specific]].
* {{Adorkable}}: A brilliant, calculating minded man with a plethora of tastes and interests, but has some trouble with certain social expectations because he doesn't think much of them.
* AintTooProudToBeg: Starting partway through season 2, Sherlock frequently finds himself needing information buried somewhere on the Internet or accessible only to master hackers. The hacker collective Everyone will get it for him for a price: self-humiliation. Sherlock has done everything from standing on a street corner asking people to punch him to writing an academic paper about ''Franchise/{{Twilight}}'' to singing along to ''Disney/{{Frozen}}'' in a prom dress. Sherlock doesn't even blink at their requests.
* AllThereInTheManual[=/=]ShownTheirWork: his heroin addiction as explicitly stated '''''On Page 1''''' of ''Literature/TheSignOfTheFour''.
* AllWomenAreDomsAllMenAreSubs:
** In the first episode we first see him after a dominatrix has left his house, though he seems to have more of an academic interest in bondage than a sexual one.
** And in the beginning of "The Deductionist", he is being entertained by two dominatrixes, who handcuff him to a chair. Unfortunately they are there for [[ClassyCatBurglar other reasons...]]
** He's apparently friendly with a dominatrix, who called him first when she discovers a client's body.
* AmbiguousDisorder:
** Following the tradition of depictions of Sherlock, his brain literally seems to work differently than other people. He has a lot of common personality traits with UsefulNotes/AspergerSyndrome--socially awkward and extremely gifted within a certain area (in his case detective work), straightforward and with a lot of BrutalHonesty, often oblivious to others' feelings but not lacking in empathy. He also has certain physical tics like the way he stands hunched in on himself sometimes, his jerking head movements and the way he grips his hands which are also consistent with someone who has Aspergers or Autism. He falls into this trope since he hasn't specifically been diagnosed on screen.
** A FreezeFrameBonus on "Deja Vu All Over Again" of his rehab report from Hemdale reveals that he is clinically depressed, refused medication and saw a therapist while in rehab.
** {{Lampshaded}} in "Murder Ex Machina": Holmes and Watson interview a woman with autism (or as she calls it, neuroatypical) who gives a lengthy diatribe on the distinction between neuroatypicality and neurotypicality. She identifies both her boss and Joan as neurotypical, but takes one look at Sherlock and admits she has no idea what's going on with him.
* AnnoyingYoungerSibling: Sherlock becomes this whenever he's around his brother Mycroft, calling him "Fatty" and needling him. It only gets worse after [[spoiler: he deduces that Mycroft slept with Watson.]]
* {{Asexuality}}: Subverted. Joan initially believes him to be this, but she quickly finds out that he isn't.
* AwesomenessByAnalysis: As usual, for his character. The show works a bit to desconstruct the "magical" aspect of his SherlockScan, though. Sherlock is often shown studying and training to maintain his deductive accuracy, showing that without hard work his awesomeness wouldn't be possible. And with Joan, Sherlock shows how it's possible to teach his observation skills to other people if they are receptive and determined.
* AwLookTheyReallyDoLoveEachOther: Holmes and Watson's relationship in the series grows into a close friendship and it's evident that they care for each other. Holmes even panics at one moment when he thinks Watson's been shot in "A Giant Gun, Filled with Drugs" and after a speech about his partnership with Watson and its complexity, he [[spoiler: gives her a chest filled with his cold cases so she can solve on her own and "succeed where he failed" in "An Unnatural Arrangement".]]
* BadassBookworm: As per usual. Unlike most incarnations of the character, Sherlock is shown to repeatedly study the subjects that he mentions.
* BadLiar: He turns into a sheet of cellophane whenever Watson's around.
* BaldOfAwesome: For a few episodes in season five, after Everyone makes him shave his head in exchange for their help.
* BatmanGambit: Has pulled off quite a few of these to catch criminals. For example:
** In "The Rat Race", [[spoiler:he gets kidnapped by the killer and convinces her that Watson will keep texting and notify the police if she doesn't hear from him. The killer sends Watson a text from his phone, telling her that he's fine and heading back and he'll see her soon. Watson realizes that Sherlock didn't send the message, because he normally messages, as she put it, "like a teenager on a sugar high," using odd abbreviations, like CUS instead of "See you soon." After tracing his phone and saving him, Sherlock reveals that he planned all of that.]]
* BerserkButton:
** He really doesn't like it when people victimize children or the mentally ill. The best example of this is in "Dead Man's Switch" where he expresses glee when he finds out the rumour that victimisers of children are treated brutally in prison is true and talks to one of them with barely restrained disgust.
** Anything relating to [[spoiler: Irene's death]] is a huge trigger for Sherlock during the first season.
** Another button was in "A Giant Gun, Filled With Drugs" when [[spoiler: Rhys tempted Sherlock to take cocaine to help with the case]], he threw out and nearly strangled the latter while ''shouting'' for even suggesting such a thing.
** In "Alma Matters" he finds out someone tried to frame him for an attempt on his father's life. He takes this very personally. Not the attempted assassination of his father, but that someone would smear his reputation in doing so.
** A more low key one is his fondness for bees extending to having extreme contempt for people whose practices would harm them, especially as regards Colony Collapse Disorder.
* BlackSheep: Apparently to his family.
* BlessedWithSuck:
** His intelligence makes him a brilliant investigator but means that he also picks up on things about people he'd rather not know, makes it difficult to sustain relationships or even find much excitement in life.
** His HyperAwareness also makes him prone to sensory overload in the chaos of a modern big city, and in Sherlock's own opinion, contributed to his drug addiction.
* BoardingSchoolOfHorrors: It's first mentioned in "Child Predator", but in "Poison Pen" Sherlock tells Watson he went to boarding school and used to be beaten up and abused by his classmates.
* BrainsAndBondage: Sherlock has a passing interest in bondage, from both a point of study and personal pleasure.
* BrutalHonesty: Sherlock has many admirable qualities, but tact and diplomacy are not among them. He also asks people to be honest with him and with themselves. And when he's called in to help {{Asshole Victim}}s, particularly {{Corrupt Corporate Executive}}s, he lets them know ''exactly'' what he thinks of them.
* BunnyEarsLawyer: Something Gregson flat out admits, and why he puts up with Sherlock's behavior, since he usually is right.
** This trope is deconstructed [[spoiler: and then reconstructed]] in "Tremors". Sherlock (and by association, Watson) goes to court thanks to his bad attitude and lack of professionalism due to a shooting that affected Detective Bell. After the evaluation, [[spoiler: the judge recognizes the value of their work to the NYPD, but also recognizes how dangerous Sherlock's lack of control and bad mood can be, deciding to end his career as a police detective. After that, Detective Bell thinks it would be better if Sherlock kept the job, so he continues to work with the NYPD, but without Bell's friendship and on bad terms with Watson, although they all eventually become friends again.]]
* ByronicHero: Though this version of the character is at the absolute light end of this trope.
* CarpetOfVirility: This Sherlock has a chest full of hair, and is a lot more sexually inclined than previous versions.
* CharacterDevelopment: Sherlock has admitted in the second season that he grew and became a softer person, not because of his own talent, but because of the help the people around him have given.
* CharacterTics: Sherlock tends to move his hands very fast (representing the [[ThinkingTic velocity of his mind]]), stand completely static in certain situations, and make hilarious facepalms with both hands when something goes wrong.
* ChildHater: He's visibly uncomfortable with children, something that is implied to be caused by his own unhappy childhood. His reaction to seeing Watson look at a picture of a mother and her baby is a disdainful "who's the breeder?", and when [[spoiler: Kitty]] brings her son to meet him he gets a look on a face that she describes as "like I'd brought a giant spider into his house." [[spoiler: Subverted in the latter case - it wasn't the kid he had a problem with, it was that she had had a child and not bothered to tell him until now, which he interpreted as her not seeing him as a friend anymore.]]
* ChivalrousPervert: Has a strong code of honor but doesn't stop him from enjoying a variety of women, from dominatrices, to seeing how "identical" two identical twins are, to just the more mundane lady.
* CloudCuckooLander: When nothing is around to occupy his mind, he can be a bit off.
* CulturedBadass: He knows much about fine Epicurean delights, various forms of art, literature, and a plethora of other "Cultured" materials.
* DaddyIssues: He and his father have a rather frosty relationship.
* DarkAndTroubledPast: [[spoiler: "M." reveals that the death of Irene Adler caused his breakdown. Moriarty-Irene faked her own death using Moran's M.O. in order to get out of Holmes's sphere, and in the process, likely unintentionally sent Holmes headlong into his worst drug use.]]
* DatingCatwoman: [[spoiler:Holmes' former girlfriend, Irene Adler, is actually his nemesis, Moriarty.]]
* DeadpanSnarker: His general tone towards others when not deducing some key fact.
* DeclarationOfProtection: This incarnation of Holmes is extremely protective of his Watson. In "Risk Management", Sherlock lies to Joan to protect her from a possible attack from Moriarty. She is not amused. Then, in "Solve For X", Sherlock tries to protect Watson from her patient's son and declares to her his concern for her mental health and feelings of guilt.
* DefectiveDetective: His work as a detective is nearly flawless, but his personal life is an absolute train wreck.
* DefrostingIceKing: Has gone from petulant to resistant to gradually more and more friendly, grateful, and ultimately open about talking about his feelings and how important he considers Watson to be, even explaining in unabashedly desperate terms how much he needs her around. With emotional relationships and his own state of being, he seems to really want and ''try'' to get better.
* DespairEventHorizon: [[spoiler:Irene Adler's death]], it would seem. Plunged into an out-of-control drug addiction and despite being a generally well-meaning logical thinker started planning a murderous vendetta.
** He comes close to crossing it again [[spoiler: in London when he is fired from his now job and his aspiring protogé Kitty walked out on him, but he was saved when Kitty returned.]]
* DiggingYourselfDeeper: In "Ancient History" when trying to explain to Watson why he slept with her friend, he manages to infuriate Watson even more when he admits that he stalked Watson in the beginning of their relationship and lied to her friend about his identity.
* DistressedDude: In "The Rat Race". Obviously, Watson is the one who rescues him.
* ElegantClassicalMusician: He plays the violin in "While You Were Sleeping" and he's seen playing piano in "The Leviathan".
* EncyclopaedicKnowledge: Obviously; this is ''Sherlock Holmes'' we're talking about!
* EtTuBrute: Poor Sherlock.
** In "The Deductionist" we see that Kathryn Drummond, a former lover and apprentice, used confidential information to profile him.
** And then in "The Woman" [[spoiler: we see the sweet Irene Adler, the love of his life, revealing her real identity: Moriarty, the one who destroyed his life.]]
** In "Blood Is Thicker" [[spoiler: we see that his brother, Mycroft, is planning something behind Sherlock's back to bring him back to London and using Watson to make Sherlock fall into his gambit.]]
* {{Foil}}: Both Sherlock and Joan are this for each other but surprisingly, in this adaptation, Sherlock is the more noticeable one, especially when we watch the whole first season and "Heroine". Sherlock is HotBlooded and emotionally dumb, while Watson is TheStoic, emotionally intelligent and controlled.
** Also, he is one for [[spoiler: Moriarty. While both of them share the genius, the intellect and the sensitivity, Sherlock is a good person who wants to make the world a better place, while Moriarty is cruel, criminal and wants to destroy everything.]]
* FoolForLove: A dark version of this. Watson pinpoints, and he later confirms, that the root of his downward spiral was the loss of a woman. And it's a loss that continues to motivate him to extremes.
* ForgetsToEat: And sleep. And shower. And take care of himself in general.
* FriendlessBackground: Subverted. At first Watson believe that Sherlock doesn't have any friends and she lampshades it in "Lesser Evils". With more episodes, she learns that Sherlock does have several acquaintances.
** And then, this trope is explicitly stated by Mycroft in "Step Nine". He tells Joan that Sherlock never had any real friends and that from his point of view, she is Sherlock's first real friend.
* FunTShirt: Sherlock used several in the beginning of the show when he was still fresh out of rehab.
* GeniusSlob: When he agreed to clean up part of the house, he would do that and only that, regardless of the mess that was building up around him.
** He also generally had a slovenly appearance early in the series, often wearing unwashed FunTShirts as regular attire. This toned down considerably with his CharacterDevelopment, to the extent where he is almost always a SharpDressedMan in later episodes. While he continues to make messes related to his work at the brownstone, he also seems much tidier than he used to be, and his messes are typically cleaned up within a reasonable amount of time.
* GoodIsNotNice: He can be crass and blunt most of the time, especially when dealing with frustration, but that doesn't stop him from being a good man.
* GoodIsNotSoft: He's still nicer than a lot of other interpretations of the character, but if he's morally outraged or for some other reason decides you need to be hurt, he will hurt you. Perhaps just to spite your expectation that he is soft.
** This trope is discussed in "On the Line". After a conflict with Watson thanks to his bad behavior, Sherlock gives up and says he is not a nice man and that's who he is. That he's not gonna change. Watson says he already changed, but he denies it. He is only nicer to Watson because she is exceptional.
** This comes back to bite him in "Tremors" when it provokes a suspect he insulted to take a shot at him, which Bell takes instead, estranging them. It probably doesn't help that Sherlock won't go visit Bell in the hospital until prompted by Joan, out of guilt and thinking his sympathies would be meaningless.
** When Sherlock [[spoiler:becomes a rehab sponsor for a recently sober addict, he makes it very clear that they will not be friends, the man will not be coddled, and if he feels he needs to talk with someone, Sherlock has a list of therapists but will not be one himself to the man. He will be there for the sole job of being his sponsor. The addict accepts]].
* HeartbrokenBadass: The loss of Irene did a number on him. [[spoiler: And then the revelation that Irene ''is'' Moriarty broke his heart forever.]]
* HeroWithAnFInGood: After the events of "On the Line" and "Tremors", Holmes' behavior seems to fit all aspects of the trope and literally everyone who works or lives with him thinks he's this.
* HorribleJudgeOfCharacter: [[spoiler: Well, he fell in love with Irene Adler knowing she was an international art thief and yet still decided to go on with the relationship believing she was a good person because of ''why'' she stole: to preserve what would only be ruined by reparation.]]
* HyperAwareness: Sherlock considers this [[BlessedWithSuck both a blessing and a curse]]. In the season one finale, someone makes the observation that the pain his HyperAwareness causes him is probably the reason he turned to drugs in the first place.
* {{Hypocrite}}: Sherlock acts like this on many occasions, and even Watson mentioned it in "The Rat Race", but it becomes more noticeable in "The Marchioness", after [[spoiler:deducing that Watson slept with Mycroft. Sherlock is absolutely outraged and upset with this situation, blaming Watson for it and being a jerk. The funny thing is: he slept with one of her best friends after stalking Watson and lying to the friend]].
** To be fair [[spoiler: Sherlock barely knew Watson when her friend seduced him. Watson was very close with Sherlock, and slept with Mycroft despite knowing that Sherlock would react badly. However, he had no excuse the second time he let her friend seduce him]].
* InferioritySuperiorityComplex: For all his arrogance and abrasiveness, Holmes believes deep down that he's unworthy of love or people treating him well.
* InsistentTerminology: ''Consultant'' detective. Not private detective.
* InsufferableGenius: He can be at times, but mellowed with his developing friendship with Joan, Captain Gregson, and Detective Bell.
* IntelligenceEqualsIsolation: Something he cautions Watson about after she begins using his methods, and it's obvious that he's experienced this firsthand.
* InTheBlood: [[spoiler: Morland reveals to Sherlock that his mother was also an addict. Sherlock is stunned, but concludes that she isn't responsible for her own actions.]]
* ItsAllAboutMe: Even though he truly cares for other people and his behavior gets better thanks to Joan, Sherlock tends to prioritize everything that happens as being about or at least related to himself.
* JerkWithAHeartOfGold: Sherlock is somewhat alienating in the way he relates to other people, but still seems to care about not needlessly insulting or angering people. For instance, his intentional mis-deducing of why Joan stopped being a surgeon was to "spare her feelings," and from his tone he was probably sincere about it too.
* JerkWithAHeartOfJerk: According to himself, at least. He claims there is not a "nicer version" of himself hidden away somewhere, waiting to be "coaxed out" into the open. Watson isn't entirely convinced.
* LackOfEmpathy: Subverted. His sensory "gifts" allowing him to deduce the lives (and hardships) of people around him actually cause him to suffer from ''too much'' empathy, and he willfully ''tries'' to lack empathy in order to protect himself from the anguish this brings him.
* LawmanBaton: He sometimes uses one, most memorably in "M."
* LoveAtFirstSight: Subverted with Watson in the pilot episode. And then possibly Double Subverted as the first season goes.
** Played straight with Irene Adler in "The Woman".
* {{Manchild}}: Explored in several episodes, most notable in "Snow Angels", when Watson sarcastically calls him "a six year old". Later in the episode, we see him making a fort with comforters to protect himself from a blizzard... inside his own residence.
* MarriedToTheJob: While he will admit to the need of carnal sexual release to help sate part of his brain, he has rarely only shown any interest in a romantic pursuit and claims that romantic love will only mess with his job. [[spoiler:After what happened with Irene, well, it's understandable.]]
* MasterOfUnlocking: He keeps a bucket of padlocks around for lock-picking as well as teaching himself how to get free from handcuffs. Also sports an ever-increasing collection of picked locks, which he hangs on some pretty enormous racks in his kitchen.
* MenCantKeepHouse: He can, he just chooses not to.
* MenDontCry: Averted. Sherlock nearly cries in the second episode, nearly cries ''twice'' in "M.", nearly cries again in "Dead Man's Switch" and finally cries out loud in "Risk Management". [[spoiler: And then there's the moment where he discovers Irene is alive...]]
* TheMentor: To Watson in the art of deduction.
* MissingMom: With all the talk about Sherlock's father, there was never any mention of his mother until Season 4, when we find out she's been dead for years.
* MommasBoy: Turns out he was very close to his mom when she was still alive. Apparently, she was the only parent who could control him.
* MotorMouth: Once he gets going on details on a case.
* NiceJobBreakingItHero: It happens a lot. Sherlock usually makes good deductions to solve the cases, but in several of them he just make things worse (other murders happen, innocent people go to jail or get hurt, etc), and almost everything he does to make amends to people he cares about ends fucking up the situation worse.
* TheNicknamer: In few occasions he comes up with nicknames for random people he meet in cases, such as ''Green Stick'' in "The Leviathan" and ''Bleach Teeth'' in "A Landmark Story".
* NonIdleRich: His family has high levels of undisclosed funds, enough to pay the blackmailers in one case, but he hates having to tap it because it generally means he then owes his father.
** In "Blood Is Thicker", we see that he only touched his trust fund to pay Watson's salary.
* TheNoseKnows: Sherlock seems to have a mundane version of this. In "While You Were Sleeping," he's able to identify a brand of women's deodorant by scent, he can identify explosives by scent (as well as other factors) in "The Long Fuse," and in "Flight Risk" he has an unusually strong reaction to the scent of model glue. In "Solve For X" he figures out that Watson went to visit her patient's grave by the smell of flowers in her clothes. In "On The Line" he deduces that a man took precautions against a polygraph by putting antiperspirant on his fingers; Sherlock shook hands with the man, then sniffed ''his own'' fingers and detected a "distinctly chemical sea breeze."
* ObfuscatingStupidity: Sherlock will on occasion lie about what he deduces, for instance when he initially claims that Joan left being a surgeon when a friend died, only to later admit that he knew she was forced out because she killed a patient.
* OddNameOut: Sherlock is the only Holmes whose name starts with an S in the otherwise AlliterativeFamily of M's.
* TheOnlyOneAllowedToDefeatYou: Sherlock's attitude toward [[spoiler: Moriarty]] and then subverted. [[spoiler:It's Watson, not Holmes, who figures out how to defeat her. When Moriarty's caught, Holmes has no problem giving Joan full credit.]]
* PassiveAggressiveKombat: Acts this way when is extremely upset or jealous. This is more visible in "The Marchioness" when [[spoiler: he discovers that Watson slept with Mycroft and starts to argue with both of them.]]
* PermaStubble: He has facial hair always just short of a beard.
* PerpetualFrowner: Lampshaded by Sebastian Moran in "A Landmark Story".
* PlatonicLifePartners: With Watson. They are good friends and reliable partners, without any romantic interest in each other.
* PoliticallyIncorrectHero: An unusual example since his behaviour isn't based on outdated moores but on ([[RuleOfCautiousEditingJudgment what he considers to be]]) cutting-edge science - for instance, at one point he tells Watson to go to bed because studies have shown that women need more sleep than men do. [[note]]Watson shoots back by noting that he neglected to mention that the same studies show that the reason why women need more sleep is that [[WomenAreWiser their brains are more active while they're awake.]][[/note]]
* ReallyGetsAround: In "Corpse de Ballet" we learn that he is involved with compulsive sex for a few weeks and sleeps with a suspect.
* RebelliousSpirit: He generally ignores his powerful father's orders.
* RecoveredAddict: Sherlock is a recovering heroin addict and Joan Watson was originally his live-in sober companion before becoming his protoge, then partner, then quit to start her own private investigation business.
* RedOniBlueOni: The passionate red oni to Watson's composed blue oni.
* ShamelessFanserviceGuy: He's definitely not shy about his {{Shirtless Scene}}s. Or his interest in bondage, for that matter (though he claims in the first episode that should Watson find a gimp mask, he's only holding that for a friend).
* SharpDressedMan: As the show proceeds and Sherlock spends more time sober, his wardrobe becomes sharper. Compare his usual outfits in Season 1 with Season 2.
* SherlockScan: [[CaptainObvious Duh!]] It can be hard to tell when Holmes is actually analyzing and when he's just zoned out, though. It's sporadic at times.
* ShirtlessScene: Part of his EstablishingCharacterMoment in the first episode. And then in "Child Predator" we first see Sherlock sitting with no shirt on and looking through some boxes. The funny part is he remembers having it on when he started his search the previous night and has no idea when or why he took it off.
* SiblingRivalry: With Mycroft. [[spoiler: It only gets worse after he discovers Watson slept with Mycroft.]]
* SophisticatedAsHell: He has a tendency to say socially inappropriate or overly blunt things in an oddly formal way. See "The Deductionist", where he describes serial killers as 'onanists' (which is a really roundabout way of saying jerkoffs or wankers), and "Déja Vu All Over Again" when he tells Watson that 'opinions are like ani' (plural of anus, or asshole). The British accent helps.
* StalkerWithoutACrush: In "Ancient History" we learn that Sherlock used to follow Watson in the beginning of their partnership to know more about her and be sure she was someone he could trust.
* StrangeCopInAStrangeLand: An English detective operating in New York.
* StrictlyProfessionalRelationship: In "Step Nine", Sherlock uses this several times to justify to himself why he and Watson can't sleep together.
* TallDarkAndSnarky: He is tall, dark-haired and he snarks.
* TantrumThrowing: When he is frustrated or unable to find a solution for a case, he tends to throw things around the Brownstone or find something to break, blow up, bounce, smash or hit.
* ThatManIsDead: In a variation, Holmes regards his addict self as a different person, one that he's glad to be rid of.
* TookALevelInJerkass: His character development in Season 2 so far surprisingly leads to this.
* TookALevelInKindness: When it comes to Watson, and recognized by both of them in-universe.
* TranquilFury: When he's very upset, personally or morally, he talks with quiet, deliberate acidity.
-->"I'll let you in on a little secret: I'm not calm. I am merely presenting a calm exterior. Inside, I am roiling."
* TraumaCongaLine: [[spoiler:Courtesy of Jamie Moriarty]] before the beginning of Season 1 and [[spoiler: it only gets worse.]]
* {{Troll}}: Sherlock frequents an online forum for conspiracy theorists and has been known to make up conspiracies out of whole cloth. Also trolls Watson into believing that he's going to make Clyde the Tortoise into soup.
** What are his plans one night? Engaging in flame wars. It's for a case. Honest!
-->'''Joan''': So you plan on arguing on the internet all night?\\
'''Sherlock''': Yes.
* TroubledButCute: He is a recovering heroin addict with some nasty depths, but he cares deeply for people despite his snarky oddball behaviour.
* UnwittingPawn: In Moriarty's plan for [[spoiler: killing Moran]] in "A Landmark Story".
* VerbalTic: A short affirming "Hm?" during an explanation of something he's deduced, as if he's magnanimously deigning to acknowledge the lesser intellects of his audience. Sometimes other characters pick it up during their own explanations.
* WaistcoatOfStyle: One of Sherlock's standbys for attire.
* WhatTheHellHero: Gets this a lot, especially from Watson and Gregson, usually accompanied by one TheReasonYouSuckSpeech.

[[folder:Joan Watson (née Yeun)]]
[[caption-width-right:250:''"I'm gonna do you the favor of believing you're just an idiot."'']]
->'''Played by''': Creator/LucyLiu

->'''Sherlock''': ''The thing that's different about me, empirically speaking, is you.''

American ex-surgeon who walked away from a successful medical career after a surgery gone terribly wrong and decided to become a sober companion.
* ActionSurvivor: As she gets into more and more fights, she is becoming this.
* AloofDarkHairedGirl: There's hardly ever a time where Watson is not composed. Deconstructed to a certain point. While her appearance is cool and tough, she also has a boatload of self-esteem issues.
* AmicableExes: With Ty Morstan in "While You Were Sleeping".
* AnimalMotifs: Bees are a motif for the series, in general, but Watson is somewhat the one who is most associated with them. In "Pilot" Sherlock mentions her daily use of beeswax in her hands. In the same episode, she is the one who notices the honey falling through the ceiling of her bedroom. [[spoiler: And then Sherlock even names a whole new species after her in "Heroine".]]
* TheApprentice: To Sherlock. An aspect of their relationship is Watson being tutored by Sherlock when it comes to deductioning skill.
* [[ArmorPiercingQuestion Armor-Piercing Sentence]]: Watson is fairly expert in these.
** To Sherlock in "Pilot": "Now I know it was a woman".
** To [[spoiler: Moriarty]] in "Heroine": "You are afraid of him".
** To [[spoiler: Moriarty ''again'' (about Sherlock's interest in her)]] in "The Diabolical Kind": "That bothers you, doesn't it?"
* AwesomenessByAnalysis: In "Pilot", Joan discovers the whole reason of Sherlock's drug addiction and despair with ''one look''. As the series progresses, her background as a doctor has actually allowed her to notice certain aspects about a case and correctly deduce the facts before Sherlock. This was first shown in "The Deductionist" when Joan realizes that [[spoiler: Patricia Ennis deliberately destroyed her kidneys in order to aid her brother's escape]], Mycroft being [[spoiler:a cancer survivor from IV scars on his arms]], and in "Alma Matters" when she [[spoiler: deduces from Morland's eating habits that he had part of his stomach removed and that the the injury came from a failed assassination attempt.]]
** Her knowledge of fashion and clothing, such as the way a woman was walking in Ugg boots, has also allowed her to pick up on things that Sherlock misses.
* AudienceSurrogate: This time, with a point of view for women and people of color.
* BadassBookworm: She's a learned doctor but she's not afraid to kick ass.
* BatmanGambit: Her plan to [[spoiler: capture Moriarty in "Heroine" is flawless. She knows Moriarty wants to win over Sherlock at any costs and own him as an object. She also knows Moriarty would never let him go without trying to turn him to her side. Then she plans the whole overdose scheme waiting for Moriarty to show up at the hospital. It works.]]
* BerserkButton: Don't even try to 1) use the accident in her operating table against her 2) threat the well-being of her former sober clients 3) ignore boundaries when it comes to her or people she likes (includes stalking and disrespect for confidentiality arrangements).
* BewareTheNiceOnes: Joan can be as sweet and gentle as a lamb, but press anything mentioned under BerserkButton and be prepared to stare down a cold glare of TranquilFury.
* {{Bifauxnen}}: Starting in season 5 Watson began wearing a lot more masculine outfits, with lots of dress shirts and ties.
* BigSisterInstinct: In "Lesser Evils" she quickly socializes with her friend's patient and is able to diagnose her within seconds. In "Dirty Laundry" she empathizes and truly cares for the victim's daughter and [[spoiler: thanks to it is able to find new evidence and put the missing pieces together, helping Holmes to solve the case.]]
** Deconstructed in "Solve for X". Watson feels responsible for her dead patient's son (a young boy), and wants to provide for him. The boy knows this and takes advantage of her good will.
* BrainyBrunette: She was valedictorian in medical school after all. She often can see beyond the facts and the evidences, being able to solve things Holmes can't. In Season 2, she is starting to notice things Sherlock misses in crime scenes.
* BrutalHonesty: She is very polite and tries to fool herself in several occasions, but when it comes to other people she prefers not to sugarcoat the truth and likes to be as direct or sincere as possible.
* TheCaretaker: By profession and by nature. Even mentioned by her friends in "Déja Vu All Over Again".
* CharacterDevelopment: Joan has become a highly proficient investigator by the second season.
* CharacterTics: Tends to roll her eyes when she's unamused or unimpressed by something.
* ClassicalAntiHero: Joan is a good and heroic person, but her lack of self-esteem and her reserved nature are constant problems in her life that she tries hard to overcome.
* CloserToEarth: A lot calmer and wiser in contrast to Sherlock's eccentricities.
* CloudcuckoolandersMinder: As usual with TheWatson, she acts as the saner, more reasonable counterpart to Sherlock.
* CombatStilettos: Wears high heel boots a lot, even while adventuring.
* TheConscience: When Sherlock starts going off the moral path, she is the one to try and convince him there are other ways.
* CustomUniform: Watson's white coat can be considered her "uniform". Even the costume designer of the show mentioned it as such.
* ConsummateProfessional: She is really dedicated and serious about her job as a consultant detective, and her posture was the same when she was a sober companion. Also, in "Lesser Evils" she tells Sherlock that she simply walked away from medicine because she didn't feel confident enough to operate again and it would be better for her (and her future patients).
* DarkAndTroubledPast: In "Solve For X", Joan tells to Sherlock what happened to her patient when she was still a surgeon.
* DeadpanSnarker: She gives a lot of dry put-downs. Truly, Joan Watson doesn't take anyone's crap.
* DeathGlare: Watson employs this frequently when Holmes says or does something that she thinks is outlandish. Which is all the time.
* DesperatelyLookingForAPurposeInLife: Her plot at the beginning. She finds it with Sherlock as a detective.
* TheDeuteragonist: Much like her literary counterpart, Watson is a classic example.
* DidntSeeThatComing: Joan is this to [[TheChessmaster chessmasters]]. Her insight and character have twice helped Sherlock best gambits being played against him. First, [[spoiler:she recognized Moriarty's flaw and how best to use it]]. Second, when [[spoiler:Mycroft was manipulating Sherlock with Joan's financial well-being on the line, Watson simply declared succinctly and tactfully "Screw [Papa Holmes]" and helped Sherlock get over his unease being cut off by his father]].
* DisappearedDad: In "Corpse de Ballet" we learn that Joan's birthfather is a schizophrenic man who divorced her mother after Joan was born and now lives homeless in New York.
* EstablishingCharacterMoment: Watson, alone in the Brownstone, finding the missing piece and cracking the case in the pilot.
* EvenTheGirlsWantHer: An escort gives Watson her card in "Dirty Laundry".
* TheFettered: Watson is a principled person who stands by her word, defends that deals and confidentiality agreements must be honored and feels bad when she needs to break the law to solve a case or find evidence.
* FlawExploitation: [[spoiler: Watson sends Moriarty to jail using her arrogance and her obsession with Sherlock against her.]]
* FlorenceNightingaleEffect: Downplayed with Liam, as explained in "You Do It To Yourself". Joan treated his injuries when she was still a resident doctor and they fell in love.
* {{Foil}}: To Sherlock. While Sherlock is HotBlooded and emotionally dumb, Watson is TheStoic, emotionally intelligent and controlled. This makes the whole difference in the season finale, when [[spoiler: Watson's ability to stay cool and focused allowed her to deduce and capture Moriarty.]]
** [[spoiler: In "We Are Everyone" we see that Watson is also a foil to Moriarty. While Moriarty is selfish about her relationship with Sherlock and destructive, Watson is his MoralityChain and wants to share their friendship with the world.]]
* AFriendInNeed: One of the few people who sticks with Holmes in rain or shine.
* GenderFlip: John Watson is now ''Joan'' Watson.
* GoKartingWithBowser: At one point she has dinner with Moriarty. Though she notes how ridiculous the situation is.
* GoodIsNotSoft: Calls the shots on a regular basis to get Holmes out of trouble or to impose authority when needed.
* GuileHeroine: She may not have combat skills, but her mind and wit is incredibly sharp, and her ability to stay cool under pressure allow her to think her way out of hard spots. [[spoiler:Including seeing Moriarty's weakness.]]
* GuiltComplex: As explained in "Solve For X", her mess up in the hospital room caused her to lose confidence in her surgical abilities. Watson blames herself for an accident that happened in her operating table, which makes her feel responsible for her dead patient's son.
* GutFeeling: In "Lesser Evils" she has a feeling that a little girl may be suffering from a serious condition and Sherlock encourages her to trust her intuition. [[spoiler: She was right]]. In "Déjà Vu All Over Again", she dislikes one person who was involved with the victim of the week. [[spoiler: She was right, again.]]
* HiddenBadass: She's in general shy and restrained, but can deliver a world of pain if pressed.
* HeroicBSOD: What happened in her OR when she was operating Gerald Castoro.
* HeroicSelfDeprecation: She doesn't have so much esteem to begin with, but in "Déjà Vu All Over Again" even Sherlock gets frustrated about this.
* HiddenDepths: The whole point of her character is to show how TheWatson is not a mere {{Sidekick}}, {{Foil}} or AudienceSurrogate without personality, relevance or feelings, but a very intelligent (sometimes even more than Holmes), flawed and complex character on her own.
* HospitalHottie: In her past, at least.
* HyperAwareness: Shows signs of it as early as the pilot and it develops further the more time she spends with Sherlock.
* IChooseToStay: Not that we didn't see this coming already, but Joan at the end of "M". Her six weeks with Sherlock is over. She decides to stay on anyway, despite Holmes' father terminating her services and pay, not that she told Holmes that. He found out. He was fine with it, and rehired her as his apprentice.
* IShouldWriteABookAboutThis: In "We Are Everyone", after feeling sorry for Sherlock's wish to hide himself from the world and declaring she shouldn't be the only one allowed to know him, she finally starts writing his chronicles.
* InSeriesNickname: Joanie.
* {{Irony}}: She began the series telling Sherlock that he needed to open himself to other people, not lock them out. By Season 3, she flat out tells Sherlock that she doesn't need him anymore, and that she works better alone.
* LastNameBasis: Sherlock is the only one who calls her "Watson".
* LightFeminineAndDarkFeminine: Watson is Light, [[spoiler: Moriarty is Dark]].
* LivingEmotionalCrutch: In "Blood Is Thicker", Sherlock admits to Mycroft that Watson is this to him. He even tells her that he doesn't want to give up their "structure" until he is ready, showing how he is dependent on their relationship.
* LivingLieDetector: In "Child Predator" she already shows signs of this without Sherlock's help. By the end of the first season, with her detective training, she can smell a lie miles away and Sherlock turns into a sheet of cellophane whenever she's around.
* LittleNo: Most of her 'No's are directed to Sherlock and his crazy ideas.
* LookingForLoveInAllTheWrongPlaces: A current theme in Season 02 is how she desperately tries to date new men and can't get no satisfaction.
* LongLostRelative: [[spoiler: She has a paternal half-sister named Lin. Lin knew all about Joan and resents her.]]
* MarriedToTheJob: When she starts to work with Sherlock. She's not happy about it, but is starting to become resigned.
* MasterOfUnlocking: In season 2, Watson is the one responsible for opening doors while Sherlock observes.
* TheMedic: Watson usually has medical knowledge that Sherlock lacks, noticing things he doesn't (such as the insulin pump in "Flight Risk" and the unhealthy food in "The Deductionist". She also fixes him up when he's hurt (his dislocated shoulder in "A Landmark Story" and his bullet wound in "Heroine"). In "A Landmark Story" we also saw her performing an autopsy, receiving compliments from Sherlock.
** In "Solve For X", she is much more comfortable in a morgue and it seems that she has been practicing autopsies.
* MentorsNewHope: After Sherlock's tragic experience with Kathryn Drummond, Watson fits this trope.
* MetaGirl: From time to time she makes a few meta comments.
* MistakenForRomance: In the beginning of their partnership, Watson had to explain more than once that despite sharing a brownstone with him, she and Sherlock are ''not'' sexually involved.
* MixedAncestry: A photo of Watson's parents in the pilot shows that her mother is Asian and her father is white. [[spoiler:Subverted. He's her stepfather and her family took his last name. Her biological father is schizophrenic and homeless.]]
* MoralityChain: By the end of the season, Watson becomes this to Holmes. Lampshaded in "Heroine" by Sherlock himself, when [[spoiler: he says he didn't use Vicodin for his back pain because of her.]]
* MsFanservice: [[DefiedTrope Defied]] in "Snow Angels". Watson refuses to change clothes in front of Sherlock and he turns his back. The audience believes that she is going to change in front of the camera but she does it underneath her sheets and only gets up after she is entirely dressed.
%% * MustMakeAmends
* MyGreatestFailure: A patient's death haunts her.
* NervesOfSteel: In "Heroine", she stares down Moriarty without so much as a bead of sweat coming out. [[spoiler: Lampshaded by Moriarty herself, when she notices that Watson is not afraid of her.]]
* NiceGirl: Joan is compassionate, caring, friendly and tries her best to help everyone around her.
* NoMrBondIExpectYouToDine: Watson and Moriarty [[spoiler: lunch together in "Heroine".]]
* NotDistractedByTheSexy: Even though Sherlock says she is ''quite Victorian'' when it comes to nudity and sex, Joan plainly ignores him when he is doing exercise in the middle of the night without a shirt and in front of her.
* TheNotLoveInterest: She's the female lead of the show as well as Sherlock's trusted partner and despite what other characters tend to assume, there really isn't any romance between her and Sherlock.
* NotSoDifferent: From Sherlock. She essentially becomes him in Season 3, complete with an ArchEnemy all her own [[spoiler: who, very much like Jamie Moriarty, is a wealthy, ruthless, and extremely arrogant woman]]. However, unlike Holmes, she prefers to work alone without a partner or protege.
** She's also not good dealing with emotional pain. While Sherlock turned to drugs to cope with Irene's death, she puts on a detached and icy demeanor as response to accidentally killing a patient and Sherlock leaving without saying goodbye.
** She admits as much in "The Female of the Species" as she realizes she'll never have a normal life again, she's too committed to being a detective.
* OnlySaneWoman: Compared to Sherlock's tendencies and behaviors, yes she is.
* OOCIsSeriousBusiness: Lampshaded in "The Marchioness". [[spoiler: The fact that she slept with Mycroft]] is this in Sherlock's opinion and he lampshades it by saying it is unlike her "to introduce such a free radical into an otherwise highly functional relationship". She doesn't like it.
* PassionateSportsGirl: In the first episodes, she's shown a passionate interest in baseball, running, and soccer. Running also seems to be her favorite way of staying in shape.
* PlatonicLifePartners: With Sherlock. While she makes clear that they aren't romantically involved, they are inseparable partners.
* PleasePutSomeClothesOn: Watson usually gets bothered when there are random shirtless men walking around the brownstone ('A Giant Gun, Filled with Drugs' and 'Solve For X').
* PluckyGirl: She's a lot older and more mature than the usual for this trope, but she qualifies through her sheer determination and ability to overcome her weaknesses. It's most apparent in "Heroine" where she manages to [[spoiler: bring Moriarty down all by herself.]]
* PolitenessJudo: Joan can wield politeness expertly as a verbal weapon.
* PrecisionFStrike: This is Creator/{{CBS}}, so there's no explicit cursing. And yet...
** In "Heroine": [[spoiler: About Moriarty: "What say we go stop this bitch?"]]
** In "Blood is Thicker": [[spoiler: About Papa Holmes: "Screw him."]]
* ProperTightsWithSkirt: Her usual attire in general, particularly when working. Has since mostly ditched the tights, presumably for extra {{Fanservice}}, or possibly because [[OccamsRazor it's summer]] at the beginning of Season 2.
* RaceLift: The white, English John Watson is now played by Creator/LucyLiu.
* ReactionShot: Watson is ''very'' good at these.
* RedOniBlueOni: The composed, stoic blue oni to Holmes' eccentric, passionate red oni.
%% * SexyWalk
* ShesGotLegs: Her collection of skirts, high heels, and tights display them quite well.
* SilkHidingSteel: A polite and down-to-earth woman who doesn't hesitate to call people out on their crap.
* SingleWomanSeeksGoodMan: Joan seems to like moral and virtuous men. She left Liam when he didn't want her help with his drug addiction (as we can see in "You Do It To Yourself"), she is interested in Jeff after he wants to see if she's okay in "We Are Everyone" and [[spoiler: she slept with Mycroft because he was "sincere, sweet and funny", as we can see in "The Marchioness".]]
* StreetSmart: The both sides of this trope apply to Watson. She is extremely practical and pragmatic, which helps a lot in her detective work, and she knows a lot about urban groups/people. This is presented in "Internal Audit", when she decides to talk with a group of skateboarders because she knows them from past experiences.
* SugarAndIcePersonality: Downplayed. Watson is severe and distant in some occasions (especially with subjects related to her personal life or her past), but is very friendly and caring.
* SupportingProtagonist: While Sherlock is the main character, the series opens up on her first day working with him, and the show's longest running arcs seems to be her own evolution as a detective and her role in Sherlock's life.
* SurgeonsCanDoAutopsiesIfTheyWant: As we can see in "A Landmark Story", "Solve For X" and "Tremors".
* SurpassedTheTeacher: It's safe to say she's a better detective than Sherlock, especially in Season 2.
** In Season 3, Captain Gregson appreciates her so much, that he tells Sherlock that he needs ''her'' permission, not his, to get his old consulting job back.
* TeacherStudentRomance: Sherlock strongly implies that she had an affair with her Chemistry teacher in "Possibility Two".
* ThereAreNoTherapists: Averted. Watson sees a therapist several times during Season 1 to talk about her issues with her job.
* TomboyAndGirlyGirl: Joan is the girly girl, Kitty is the tomboy.
* TookALevelInBadass:
** While not physically "badass" (not yet, at least), Watson is rapidly developing considerable deductive skills. Within a few weeks of meeting Sherlock, she's good enough at deduction to realize that [[spoiler: her date was lying when he said he wasn't married]] and a few episodes later that [[spoiler: Sherlock has a fear of planes]], just through body language cues. She also diagnoses a girl with a relatively rare condition through a minor foot injury, in an interesting confluence of her medical skills and burgeoning powers of deduction that makes her seem not unlike Series/{{House}}.
** And in "A Giant Gun, Filled with Drugs", she manages to knock out an armed man and gets Sherlock to call 911, ''and'' stops a man who got shot from bleeding to death.
** Takes an even bigger level in "Heroine" when [[spoiler: she is the one who deduces and brings down Moriarty]].
** In "Step Nine" she effortlessly takes down an escaping criminal with a collapsible baton. Sherlock is pleased she's been attending her self-defense classes.
** In "We Are Everyone" she is already an expert in lockpicking and [[spoiler: then she learns pickpocketing ''by herself'' and stoles the watch of the criminal of the week, being able to catch the evidence needed to solve the case]]. Even Holmes gets impressed and is speechless for a moment.
* {{Troll}}: In "Ancient History", Watson makes Sherlock panic for a few seconds by [[spoiler: telling him that her friend Jennifer could be pregnant with his child]].
* UnderestimatingBadassery: [[spoiler: Moriarty underestimated Joan, calling her "a mascot". Turns out that Joan was the one who solved the crucial Moriarty puzzle in "Risk Management" ''and'' was the one who solved Moriarty herself, being instrumental to her capture in "Heroine".]]
* [[UnfazedEveryman Unfazed Everywoman]]: About 90% of all Sherlock's antics barely faze her. Even when he crashed her car in a temper tantrum in the first episode, she didn't go ballistic on him.
* TheWatson: As an audience surrogate, of course, from a female point of view. Downplayed as she's slowly becoming a decent investigator in her own right. [[spoiler: Deconstructed in the season finale, when she was underestimated by [[BigBad Moriarty]] and in the end was the only one able to "solve" her, being promoted from {{Sidekick}} to TheHeroine and Sherlock is the one who needs to explain to Moriarty (and the audience) her deduction and plan.]]
* WellDoneDaughterGirl: Watson has hints of this in "The Leviathan". When going to brunch with her mother, Sherlock mentions that she's dressing for a job interview, not meeting a loved one. Slightly subverted in that it turns out that her mother isn't criticizing her current career because it's not as respectable as a surgeon, but because it doesn't make Joan happy. Joan's mother is actually glad she's working with Holmes because this ''does'' make her happy.
* WhamLine: In "Flight Risk":
-->''"I know about Irene"''.
* WhamShot: In "We Are Everyone", [[spoiler: the screen of her computer when she starts writing the chronicles of Sherlock Holmes.]]
* WhenSheSmiles: Joan is usually on the quiet and serious (and outwardly severe) side, but occasionally when she gets excited about something she lights up in really giddy grins.
* WithFriendsLikeThese:
** Emily, who sets her up with a married guy in "Rat Race", ambushes her with other friends in "Déjà Vu All Over Again" and signs her up for a dating website in "We Are Everyone".
** UpToEleven with Sherlock in "Ancient History", when he flat out admits that he used to follow her around and spy on her in the beginning of their partnership and that he lied and ''slept'' with a close friend of hers.
* WomanInWhite: In Season 2, Watson is mostly wearing white clothes in addition to her usual white coat.
* WomenAreWiser: Played with. While both leads are certainly intelligent, Sherlock's analytical knowledge, general knowledge and deduction reasoning are a few steps ahead of her own. That said, from her experience with medicine and people, she possesses more medical knowledge and is able to deduce people's emotions.
%% * YouthfulFreckles

[[folder:Captain Thomas "Tommy" Gregson]]
[[caption-width-right:250:''"Look, you bring me solid evidence, establish probable cause, I'll put cuffs on [[BlasphemousBoast God himself.]]"'']]

->''"You don't let anyone into your life that's not constantly concerned with you... what kind of mood you're in, whether you're getting high or not, whether you're going to work like an adult or throw a temper tantrum. You know, most of the time, you're worth it, 'cause you are special. Damned if you don't know it. But you are."''

->'''Played by''': Aidan Quinn

A former UsefulNotes/{{Scotland Yard}}er and Sherlock's contact at the NYPD. The two have mutual respect for each other.
* ActionDad: In "Dead Man's Switch", Sherlock reveals that Gregson has two daughters.
* AdaptationNameChange: Early promotional material and reviews referred to him as 'Tobias Gregson', in line with his counterpart from the original Holmes canon. The name was never used on screen and during the first season the nameplate on his desk read 'T. Gregson'. The second season established his name as 'Thomas' which has stuck ever since.
* AmicableExes: Even though he and Cheryl have separated after twenty eight years, they've settled into this at the end of "An Unnatural Arrangement".
* BenevolentBoss: He is generally friendly and affable to his people, Sherlock and Watson. He even understands some of Sherlock's actions. See SecretSecretKeeper below.
* BrutalHonesty: In Season 3, he tells Sherlock that although he likes him, they were never friends, they just never bothered to admit it out loud.
* ByTheBookCop:
** Most prominently in "One Way to Get Off", where he agonizes over the possibility that a murderer might have been convicted with planted evidence. [[spoiler:[[FramingTheGuiltyParty While the evidence was planted (by Gregson's then-partner without his knowledge)]], Holmes ends up finding evidence that proves that the man really was guilty.]]
** Also demonstrated in "The Red Team": He's understandably disturbed by Sherlock's willingness to [[spoiler: kidnap and torture Moran]] in the previous episode. When Watson defends Sherlock by pointing out that he believed [[spoiler: Moran]] was responsible for Irene's death, this is his response:
-->'''Gregson:''' That makes it natural to think about paying him back, but officers in this department do not act on those feelings.
* ADayInTheLimelight: He has larger roles than usual in "One Way to Get Off" and "An Unnatural Arrangement".
* DaChief: As per the archetype, his job is basically to reign in Sherlock's stubborn eccentricity.
* FairCop: A mild example, but he's quite handsome for a rugged cop.
* FriendOnTheForce: Sherlock knew him from his days in London soon after 9/11. Now even Watson finds she can talk to him in confidence about certain issues.
* InspectorLestrade: Gregson seems to take the actual Lestrade's place as this role, undoubtedly named after one of Lestrade's colleagues in the first Sherlock Holmes story, Inspector Tobias Gregson. Downplayed, since Gregson is actually a very good detective, and even Sherlock acknowledges it.
* OnlySaneMan: His reactions to Watson's and Holmes's methods can be summed up as this.
* PapaWolf: When his
* ReasonableAuthorityFigure: And it's a good thing, too. While Sherlock is an invaluable aid to the police, and Gregson realizes this, Holmes' antics can make him hard to deal with. Gregson often has to clean up Sherlock's messes after he offends people.
* TheReliableOne: He stays by Holmes even in some dark times.
* SecretSecretKeeper: He's known about Sherlock's drug problem for a while. Although he's not happy that Sherlock was not upfront about it to him in the first place, he still believes in Sherlock's abilities.
* SharpDressedMan: Dresses well. Captain Gregson has a very good sense of style.
* SilverFox: Remains attractive well into his middle age.
* TeamDad: He's gruff, straight-laced and puts the well-being of his people before all else.

[[folder:Detective Marcus Bell]]
->'''Played by''': Jon Michael Hill

An NYPD detective who works with Gregson. He's often assigned to Sherlock's cases.
* AbusiveParents: In "Fly Into a Rage, Make a Bad Landing", Sherlock deduces [[spoiler:that Marcus's mother hadn't been in a car accident like he'd said but had been repeatedly and rather viciously abused by his father, resulting in several life threatening injuries and almost killing her. Marcus confirms that his mother wasn't the only recipient of the abuse and that he and Andre were both victims as well.]]
* ByTheBookCop: "Details" show that this almost gets him killed as [[spoiler: his ex-girlfriend, a fellow police officer, tried to murder him and his brother because Marcus had gone to Internal Affairs with evidence that her former superior on a major drug case was a DirtyCop, thus blocking her chances at promotion.]]
** Not only that, his brother Andre is an ex-criminal. Their relationship had been strained because of this, but after an attempt was made on their lives, they're seen slowly reconciling.
** Taken further with "Fly Into a Rage, Make a Bad Landing", where we discover his [[spoiler:father was physically abusive to him, his brother and his mother and it seriously affected his upbringing.]]
* CanonForeigner: Out of the main cast, he's the only one without an evident counterpart in Creator/ArthurConanDoyle's stories - though he ''did'' have a counterpart in reality.
* ADayInTheLimelight: "Details" centers around an attempt on his life, as well as his ex-criminal brother Andre. "All in the Family" centers around his [[spoiler: work for the Demographics Unit and his return to the NYPD.]] In season 5, his relationship with Chantal becomes the basis of a multi-episode story arc.
* DeadpanSnarker: Matches Holmes in the sarcasm factor.
* FairCop: He has quite the physique.
* FireForgedFriends: Marcus and Sherlock definitely got off on the wrong foot when they first worked together in "While You Were Sleeping", but since then they've come to respect each other.
* FriendOnTheForce: After [[spoiler: Gregson stops trusting Holmes]]. Sherlock comes to refer to all the other detectives who are not Gregson and Bell as "Not Bell". {{Lampshaded}} in "All in the Family". [[spoiler:Holmes and Watson dismiss the cops they've been working with since Bell moved to the Demographics unit as a series of "[[ReplacementScrappy bad dates]]".]]
* MeaningfulName: He shares his last name with Dr. Joseph Bell, the inspiration for the original Sherlock Holmes.
* MrFanservice: Bell is put into several tight-fitting shirts in "Details". Fandom was very happy indeed.
* MythologyGag: His name could be a reference to [[ Joseph Bell,]] a doctor that Sir Arthur Conan Doyle worked for and loosely based Sherlock Holmes on.
* TheReliableOne: Alongside Gregson, he's this for Holmes.
* SarcasticDevotee: His relationship with Sherlock.
* SecondEpisodeIntroduction: He's not in the pilot, but he's appeared in every other episode so far.
* SecondEpisodeSubstitute: To Detective Javier Abreu.
* SharpDressedMan: Always seen in a suit (or one of the aforementioned tight t-shirts). Sherlock calls attention to this.
-->"Then I remembered your dark grey summer suit you favored in September. Always paired with your brown Pergottis."
* SmarterThanYouLook:
** In "You Do It To Yourself", he was the one who knew that the mahjong tiles in Annunzio's desk were for membership into underground gambling parlours, something that Sherlock didn't deduce.
** In "Snow Angels", he figures out that a suspect has been wearing a wig recently, leading him to deduce the suspect's true identity.
* WeUsedToBeFriends: In "Tremors", after [[spoiler:being shot thanks to Sherlock's bad attitude towards an armed man, he clearly doesn't want Sherlock around anymore, and tells him this directly. However, by the end of "All in the Family" they're working together again.]]


[[folder:Sebastian Moran]]
-> '''Played by''': Vinnie Jones

A legendary and exceedingly efficient SerialKiller who has crossed paths with Holmes before.

* ArsonMurderAndJaywalking: As if being a brutally efficient killer wasn't bad enough, he's also an Arsenal fan (may be a more serious infraction than others, depending on how much of a football fan you are).
* BaldOfEvil: He's bald and also a ProfessionalKiller.
* TheDragon: To Moriarty.
* DrivenToSuicide: Was forced to commit suicide by banging his head against a mirror when Moriarty sent him this message: [[spoiler: "MORAN YOU NEVER TOLD ME YOU HAD A SISTER. [[SadisticChoice SHE DIES OR YOU DO. YOUR CHOICE.]] M".]]
* EvenEvilHasLovedOnes: [[spoiler:Moriarty threatened to kill his sister, forcing Moran to commit suicide.]]
* EvilBrit: Quite English and quite evil.
* FateWorseThanDeath: [[spoiler:His suicide attempt left him comatose, unlikely to last the night. He will not wake up.]]
* GeniusBruiser: All of his crimes are perfectly calculated, and he is a frighteningly strong man. He becomes an even stronger example of the trope once it's discovered that his crimes [[spoiler: were paid assassinations]], even if they were not necessarily [[TheManBehindTheMan planned by]] [[TheDragon him.]] To whit - breaking into his victims' homes while carrying a large tripod device, killing the victim quietly using a fairly complex method, leaving carrying said tripod and the victim's body, ''all without being seen'' would not have been easy, yet he did it successfully three dozen times. [[spoiler:Moriarty]] chose a splendid tool.
** He's also able to [[spoiler:decode Moriarty's last message entirely in his head.]]
* HeroKiller: [[spoiler: Subverted. Turns out he didn't kill Irene Adler. He still fits the type of character, however.]]
* ManOfWealthAndTaste: He is kept well paid by his employer.
* MistreatmentInducedBetrayal: Sells out his boss when he finds out he was framed.
* NotMeThisTime: As noted above, he insists that he was in prison when [[spoiler: Irene Adler was murdered. Holmes soon verifies that he's telling the truth.]]
* ObfuscatingInsanity: Holmes fully believes he is faking his madness. [[spoiler:He's completely right.]]
* ProfessionalKiller: A ruthless British assassin.
* PsychoForHire: Notably he's a violent brute even when he's ''not'' being paid to kill someone, as evidenced by the fact he's a Hooligan.
* RedHerring: There are some early hints that he was the ''Elementary'''s version of Moriarty but instead it turns out he is working for Moriarty.
* SerialKiller: What he is believed to be. [[spoiler: He is actually a hitman.]]
* SeriousBusiness: Moran and the Arsenal.
* TheSociopath: He gleefully admits to having murdered 36 people. [[spoiler: Kills another person later while in prison, laughing and ''singing a song'' after he does it.]]
* TooKinkyToTorture: He laughs and mocks [[spoiler: Sherlock's torture.]]
* TortureTechnician: Moran even gives Holmes tips onto how best torture him.
* VillainsOutShopping: We briefly see him resting and watching a football game while dispensing with the services of a hooker.
* WhamLine: In "M":
-->[[spoiler:"Your girl. That was him. That was Moriarty."]]
* WouldHitAGirl: Some of his victims were women. [[spoiler:Indeed, he's trying to kill a woman when Holmes finds him.]]
* WouldHurtAChild: It is mentioned one of his (many) victims was twelve.
* YouHaveOutlivedYourUsefulness: [[spoiler: On the receiving end from Moriarty]].

[[folder:Daniel Gottlieb]]
-> '''Played by''': Creator/FMurrayAbraham

* AttentionWhore: When he's caught, he doesn't bother asking for a lawyer. He just eagerly spills his guts about ''every'' job he's ever done, happy to finally have an audience.
* BadassBookworm: A unassuming but clever man who kills the ''shit'' out of people using nothing but his wits.
* TheChessmaster: He manages to plan around Holmes efficiently.
* DeadpanSnarker: Once he's captured, he's all snark.
* [[CoDragons Co-Dragon]]: To Moriarty alongside Moran.
* EliteMook: One of Moriarty's chief assassins.
* EvilGenius: Sherlock describes him as the scalpel to Moran's bludgeon.
* HeroKiller: Was once contracted to kill Holmes, back when he was still a junkie. For reasons Gottlieb didn't understand, the hit was later called off.
* MakeItLookLikeAnAccident: His M.O.
* MythologyGag: In "The Final Problem", Holmes tells Watson that since he's been on Moriarty's trail, he's almost been killed "by accident" a suspiciously large number of times (like almost being hit by a "out-of-control" carriage, narrowly dodging a brick dropped from a building, and so forth), strongly hinted to be the work of Moriarty's henchmen. Gottlieb takes that concept and makes it into a character of its own.
* ProfessionalKiller: His job is to put people out of Moriarty's way.
* PsychoForHire: He was a serial killer ''before'' becoming a hitman. This should tell you enough.
* SerialKiller: Was already this before Moriarty contacted him. Afterwards, [[TheSociopath he at last gets]] [[SoftSpokenSadist paid to do]] [[PsychoForHire what he loves.]]
* TheSociopath: Doesn't feel an ounce of remorse for his actions. On the contrary, he's very proud.
* SoftSpokenSadist: Gottlieb is polite and serene as he meticulously plans your death. His opening scene has him calmly causing a man to have a heart attack and admitting he'd be entirely content watching his victim die if he wasn't on orders.
* WeakButSkilled: He's a scholarly old man with no evidence of any advanced combat training. He's also a successful assassin with an effective and uniquely subtle M.O.

[[folder: Isaac Proctor]]
-> '''Played by''': Erik Jensen

* BeardOfEvil: Initially, he later shaves it.
* BulletProofVest: Deliberately shot a policeman's vest, not wanting to kill him.
* CombatPragmatist: When he goes after Sherlock, he simply sneaks up behind with a gun. It's only through chance Sherlock sees his reflection on a lamp and gets shot in the shoulder. In a brief physical struggle in which he drops his gun, Isaac repeatedly rams his knee into Sherlock's bullet wound. And when Sherlock escapes upstairs, Proctor briefly considers running after him before deciding on retrieving his gun.
* ColdSniper: Kills John Douglas this way.
* ContractOnTheHitman: Moriarty's men try to kill him when he goes rogue.
* ImportantHaircut: In "The Woman", he shaves off his long hair and beard when on the run.
* InTheBack:
** Tries to this to Sherlock, but Sherlock sees his reflection in a lamp and takes a bullet to the shoulder instead.
** [[spoiler:Is killed like this at the hands of Moriarty]].
* IWantThemAlive: Is ordered not to kill Sherlock, which becomes clear that he could have done so after shooting Douglas. When he is betrayed, he gets revenge by trying to kill Sherlock, whom he realizes that Moriarty is obsessed with.
* WhamLine: In "The Woman" when he reveals Moriarty is a woman:
--> Then a few hours ago, she tried to have me killed.

[[folder: Moriarty]]
[[caption-width-right:270:[[labelnote:Click here to see Moriarty. Massive spoilers, obviously.]][[/labelnote]]]]
->'''Played by''': [[spoiler: Natalie Dormer]]

Moran's MysteriousBacker. Sherlock's new nemesis and the one responsible for the death of Irene Adler, Sherlock's ex-lover from when he was in London.

* AdaptationalBadass: As portrayals of [[spoiler: Irene Adler]] go, she even outclasses [[Series/{{Sherlock}} The BBC's]] version in this regard. That version managed to "bring the country of England to its knees", but she was ultimately still a minor villain compared to Moriarty. This version ''is'' Moriarty.
* AdaptationalVillainy: Moriarty holds an aspect the original one never did. [[spoiler: In [[Literature/SherlockHolmes the original stories]], Irene was nothing more than an unusually clever opera singer who happened to get her hands on a compromising photograph, and was smart enough to prevent Holmes from stealing it back. Here, she's a persona deliberately created by her true identity, Moriarty, to seduce and fool Holmes.]]
* ArchEnemy: Naturally, what with being Sherlock Holmes' iconic nemesis. [[spoiler:However, this version of Moriarty has a more personal connection to Holmes than just being his rival. In addition to being a criminal mastermind, she also seduced him with a false persona, causing the reveal of her true nature to hit him close to home.]]
* BadassInANiceSuit: Has a nice selection of them to choose from depending on mood.
* BadassBoast: Delivers a chilling one to Sherlock in the first season finale:
--->'''Moriarty''': I would never kill you. Not in a million years. You may not be as unique as you thought, [[spoiler: darling]], but you're still a work of art. I appreciate art. But, what I can do - what I ''will'' do - is ''hurt'' you. Worse than I did before. I have reserves of creativity I haven't even ''begun'' to tap. So please, for your own good, ''let me win.''
* BadBoss: Don't stop being useful to Moriarty; death by sniper rifle is the least painful retirement plan. Even then, being useful is no guarantee. See WeHaveReserves below.
* BadGuysDoTheDirtyWork: Because Watson is hers to play with, not anyone else's, she has [[spoiler:Elana March killed after she started a revenge plot on Joan that caused Andrew's death.]]
* BeneathTheMask: Moriarty reveals to Sherlock [[spoiler:she is Irene, his love interest]].
* BigBad: Of Season 1.
* BitchInSheepsClothing: Moriarty can play up a facade of a friendly, people person who is actually a ruthless criminal.
* BrokenPedestal: To Holmes. As [[spoiler:Irene]], he saw her as an exceptional woman, calling her "the one who eclipses the whole of her gender". The reveal that [[spoiler:Irene]] was really Moriarty nearly broke him.
* BrutalHonesty: Subverted. In a flashback conversation between [[spoiler:Irene and Sherlock in "The Woman", he praises her honesty towards people. In "Heroine" he finds out that she was lying about ''everything'']].
* CardboardPrison: Moriarty revealed capable of [[spoiler:breaking out of her prison with ease when the time comes. She even tells her warden how many ways she has planned to get out]].
* CardCarryingVillain: She is under no illusions about her evil lifestyle.
* CharacterShilling: [[spoiler:Sherlock gives high praise of Irene to everyone he meets, calling her ''the one who eclipses the whole of her gender'', but when we see her through flashbacks, she is (seemingly) just a normal painter trying to live her life. [[SarcasmMode Almost as if he wasn't exactly objective about her]].]]
* TheChessmaster: Orchestrated ''hundreds'' of murders, which occurred over the span of ''years'' without being discovered.
* ClingyJealousGirl: One possible way to explain Moriarty's animosity with Watson. When Moriarty learned that their partnership was Sherlock's idea, Moriarty was visibly upset about it. She then proclaimed to Watson that she was the only one Holmes could ever relate to and that Sherlock will eventually move on from Watson. Later, she's quite offended by another female crime boss trying to take her place as Watson's arch-nemesis and has her killed.
** Becomes even more layered when one takes into account Moriarty's projecting onto Sherlock; her insistence that Sherlock will eventually get bored with Watson lines up against the fact that Moriarty herself still can't stop thinking about Joan. She almost seems to be trying to reassure herself that ''she'' will get over her obsession with the obviously unworthy "mascot". [[LesYay Whose face she painted a massive Renaissance-style portrait of, from memory.]]
* ComplexityAddiction: Moriarty seems to suffer from this, especially [[spoiler: when she is focused on Sherlock. She could've killed him years ago, but insisted on studying him, creating a whole new identity for this and messing with his head for years. The simple fact that she can't stop with the abuse and the mind-games is what allowed Watson to send her to jail]].
* CompositeCharacter: In this version, Moriarty is revealed to be [[spoiler:playing the role of Irene Adler to get close to Sherlock. As such, she does successfully fool Sherlock using a disguise like in the original tales, leading him into his pre-show drug addiction and collapse]].
* ConsummateLiar: Half the things Moriarty says are lies. This criminal can speak truths, one just needs to look carefully at the words and actions.
* CulturedBadass: A very talented painter and [[spoiler: art thief]] who does it for pure appreciation of art.
* DamselInDistress: Subverted. At first we think [[spoiler: Irene has been traumatized and held captive by Moriarty for months]] but turns out that [[spoiler:she ''was'' Moriarty and]] was the one planning everything.
* DatingCatwoman: [[spoiler: Irene]] was Holmes' ex-girlfriend in London. Seduced him to study his intelligence and methods and then destroyed him. She and Holmes still have this odd kind of relationship, even after they officially become enemies.
* DespairGambit: What she did to Sherlock before the events of Season 1 certainly qualifies. It becomes even more complex when she was both the mastermind who crafted the gambit and [[spoiler:the loved person who had to die to destroy him.]]
* DiabolicalMastermind: Loves to plan out various gambits that can be truly destructive and personally profitable. In the end of season 1 [[spoiler:Moriarty was willing to cause a huge international interest to get a windfall on a currency bet]].
* DisproportionateRetribution: Sherlock Holmes ruins her plans? It's time to [[spoiler: create a whole new persona, seduce him, live with him for a while until you fake your own death and leads the man to despair and heroin addiction.]] Her original idea of just killing him would have been kinder.
* EntertaininglyWrong: Everything Moriarty assumes about Watson and her partnership with Sherlock in "Heroine" and in "The Diabolical Kind" is wrong.
* EvenEvilHasStandards: Averted. Moriarty kills men, women, elderly people and a child without feeling remorse and doesn't hesitate before killing employees or deliberately ruining loved one's lives.
** It looks as though it might be played straight in "The Diabolical Kind" when she's angered by her treacherous minions kidnapping a little girl. [[spoiler: Then it's subverted by the reveal that the girl is her daughter, her anger stems from both her minions defying her and MamaBear instincts that she considers burdensome, and she doesn't really care about her daughter on a personal level.]]
* EvilBrit: Moriarty comes from Britain.
* EvilCannotComprehendGood: She fails to understand the complexity of Sherlock and Joan's friendship, even implying that Joan is sexually attracted to Sherlock, and underestimates Joan's abilities. Joan's impartial view about the whole mess allows her to see further and deduce Moriarty's motivations. When Moriarty is captured, she's pretty surprised.
** In "The Diabolical Kind" she ''tries'' to comprehend goodness and feelings, but fails, still asking Sherlock just how he does it as it's beyond her grasp. Even the care she has for [[spoiler: her daughter is something she doesn't really understand and gives the impression that she'd much rather be without it.]]
* EvilCostumeSwitch: After her identity reveal, [[spoiler:Irene]] starts wearing exclusively black, likely an indicator of her 'dark' side finally revealed to Holmes.
* EvilIsPetty: Her behavior not only includes major acts of villainy, but she's also an utter dick. Her rudeness, her racist and dismissive slurs towards Watson, the poor treatment she disposes for her employees, her pleasure in starting interpersonal conflict just for fun, mocking Holmes for his drug addiction, being a douche to all the other villains, etc.
* ExpositoryHairstyleChange: [[spoiler:As Irene,]] she used to always wear her hair down. After TheReveal that she's Moriarty, her hair is either done up in structural hairstyles in a ponytail. [[spoiler:And then when she tries to seduce Sherlock again, in the end of "Heroine", she goes back to Irene's hair.]]
* FakingTheDead: Moriarty planned and faked her own death because she knew how this would affect Holmes and be good for her plans.
* FatalFlaw: She constantly underestimates Watson, to the point where she still does it even after underestimating Watson results in her being exposed and jailed, as shown by the fact that she never even considered the idea that their partnership was Sherlock's idea.
* FauxAffablyEvil: Can act polite and friendly, but it is ''always'' an act.
* {{Fauxreigner}}: Moriarty pretends to be an American when meeting with Sherlock at one point. [[spoiler:Dormer gets to use her real accent after the reveal.]]
* FeetFirstIntroduction: The first image we see of her is a closeup of her bare foot with red paint on it.
* FirstNameBasis: The only person Holmes calls by first name consistently, at least until "The Woman". He still has to correct himself occasionally in the second season.
* {{Foil}}: For Sherlock and for Watson, in different ways.
** Sherlock and Moriarty share the genius, the personality and the sensitivity, but while Sherlock is good and somewhat naive, Moriarty is evil and unscrupulous.
** In "The Woman/Heroine" we see how Watson and Moriarty are opposite sides of a coin. While Watson is kind, selfless, rebuilds lives and shows to Sherlock the true meaning of friendship, Moriarty is evil, selfish, destructive and can't truly understand the meaning of love. In "We Are Everyone", Sherlock, Joan and Moriarty are contrasted to each other (and related at the same time) in the final scene of the episode. While Joan encourages Sherlock to open himself and let other people know him, Moriarty continues to suggest that she remains the only person who can truly know him.
* FragileFlower: In "The Woman", [[spoiler: a traumatized Irene is the epitome of this trope]]. Subverted by the end. Turns out it was just an act.
* GenderFlip: One of the twists to this version.
* GenreMotif: In the flashbacks of "The Woman", everytime Sherlock meets her, [[spoiler: a soft and romantic piano song starts playing.]]
* TheGhost: Sherlock had absolutely nothing on Moriarty, whose true identity was unknown, at least at first.
* GoneHorriblyRight: Moriarty's plan to [[spoiler:fake her death]] and as such distract Sherlock enough to stop ruining Moriarty's plans. He spirals into drugs instead, which is not what she anticipated -- after all, no one destroys a unique work of art so lovely as the mind of Sherlock Holmes.
* HoneyTrap: To Sherlock. After he unknowingly foiled several plans, she [[spoiler:seduced him to get close enough to study him, then faked her murder to distract him so she could go about her other plans without his interference.]]
* InsufferableGenius: A truly brilliant mind, but odds are Moriarty will repeatedly rub this face in people's faces, smirking.
* {{Irony}}: Says that people underestimate women, which has proven useful. Calls Watson "a mascot" and underestimates her in a meeting. Few hours later, Watson is the one who "solves" her and plans her capture. Holmes mentions it: "She ''solved'' you. The mascot. Watson." Moriarty leaves the scene almost in tears.
* ItsAllAboutMe:
** Even her concern over Sherlock in the first season finale is selfish. She doesn't care about his well-being so long as he's at least alive and still continues to threaten him.
** In "The Diabolical Kind" [[spoiler: she gets furious because her henchmen had the nerve to kidnap ''her'' daughter and try to take over ''her'' criminal empire. She likely wouldn't help the police if her henchmen were doing something else that didn't affect her in any way.]]
* ItsPersonal: Instead of just killing Sherlock as planned, Moriarty dropped her initial plans to murder him, [[spoiler: seduced him to understand his methods and his brain and became obsessed with him. Then she faked her own death, knowing he would be devastated, and continued to toy with him after his recovery for personal amusement.]]
* JerkWithAHeartOfJerk: Even though she cares for Sherlock, she remains arrogant, cruel, vicious, haughty, and obsessed with Holmes to the point of ruining his entire life and career without remorse.
* KickTheDog: From "Heroine", she directly mocks Sherlock's addiction and uses it to humiliate him. In an odd twist, she later reveals that his addiction unnerved her greatly, so perhaps her mocking was to hide her real feelings on the matter.
* LackOfEmpathy: Moriarty doesn't care for anyone's feelings and just wants to get the job done. [[spoiler:She doesn't even 'care' for Sherlock as a person - only as either a wonderful toy she can play with or as a magnificent work of art that she can relate to. She continues trying to manipulate him after his seeming overdose in "Heroine" purely for her own entertainment. His health means nothing to her so long as she doesn't destroy him completely.]]
** [[spoiler: Addressed in "The Diabolical Kind" where she refrains from killing her guard only because it would have looked bad to Sherlock. She asks him if caring how other people perceived him is what keeps him grounded.]]
* LastNameBasis: We don't learn her first name, [[spoiler:Jamie]], until the second season episode "We Are Everyone".
* LettingHerHairDown: As a result of the ExpositoryHairstyleChange.
* LivingEmotionalCrutch: Was this for Holmes before becoming a BrokenPedestal. [[spoiler:Her "death" aggravated his previously mild drug habits and sent him into a breakdown.]]
* LoveInterest: Invoked as a way of getting close to [[spoiler:Holmes.]]
* LuxuryPrisonSuite: After being arrested, she's able to manipulate the British and American governments by offering off information. She's kept in an warehouse, where's she allowed a newspaper, reasonably free movement and art supplies.
* MakeItLookLikeAnAccident: Contracts several hitmen to make the murders look like the works of serial killers or freak accidents when they are actually financially motivated assassinations.
* MamaBear: "The Diabolical Kind" reveals that [[spoiler: she has a young daughter, who is kidnapped by one of her former henchmen. She escapes from her prison, hunts down and murders the henchman and his team, while bleeding out from cutting her wrists to short circuit her handcuffs. It's left ambiguous as to whether she truly feels anything beyond superficial concern for the girl, a biological maternal bond she can't get rid of, or if she's simply trying to manipulate Sherlock]].
* ManicPixieDreamGirl: Deconstructed. [[spoiler:Irene is first introduced as an optimistic, sexual, beautiful, artsy and quirky woman who showed a bright side of life to Holmes.]] It doesn't last. [[spoiler:Her "death"]] led Holmes to addiction and destroyed his life and career in London. Just to get better, two years later Holmes discovers that [[spoiler:she was faking everything and "Irene" never existed at all. Her persona was meticulously constructed to fool Holmes and push him away from her plans, and her "death" was designed to break him.]]
* ManipulativeBastard: Oh so much. Moriarty knows how to push people into doing things they wouldn't do normally. [[spoiler:Such as getting Holmes to give Moran the order "Kill yourself or I kill your sister"]].
* MightAsWellNotBeInPrisonAtAll: To the point where [[spoiler: she willingly returns to prison at the end of "The Diabolical Kind", despite having the opportunity to escape. She tells Sherlock that she doesn't want to live like a fugitive, especially when she'll be free soon enough.]]
* MinorMajorCharacter: Despite being the BigBad of the show, [[spoiler: Moriarty appears in 4 episodes out of 36, and in 2 others only as a voice-over.]]
* MysteriousBacker: To Moran and Daniel.
* MythologyGag: As in "Valley of Fear", it is observed that [[spoiler:Irene keeps a painting he/she could not possibly afford legally prominently displayed for anyone to see. Holmes identifies it upon sight, implying that most people would just think it's a reconstruction. Fans who realized this knew Irene Adler was Moriarty a good forty-five minutes before the ultimate reveal.]]
** Also, her full name is Jamie Moriarty, which reflects the original's full name James Moriarty.
* {{Narcissist}}: Moriarty is a cold, manipulative chameleon who believes she is superior to ''everyone''. The reason she [[spoiler: became Irene Adler]] was to examine Sherlock up close and personal as a warped experiment after she thought he was a threat but was intrigued by how similar their minds were; the reason she [[spoiler: faked her death]] was because she concluded that she was ''better'' than he was and hat he therefore posed no threat- she views his subsequent emotional breakdown and spiral into drugs not as a destructive but normal human reaction to a tragedy, [[InsaneTrollLogic but as proof that she was correct to judge him inferior after all.]]
* NominalHero: The very definition of the trope in "The Diabolical Kind", to the point where her method of saving the day in the end is mass murder.
* NonActionBigBad: Save for [[spoiler: personally shooting Isaac Proctor]], all of Moriarty's crimes are committed at a remove. In "The Diabolical Kind" [[spoiler:she averts this by going out personally to handle her daughter's kidnappers]].
* NotSoDifferent: "Do you know why you're so drawn to narcotics? Because you're in near constant pain. [...] I know what that's like, Sherlock. Only me."
* NotSoStoic: In "The Diabolical Kind", when [[spoiler: her kidnapped daughter is put on the phone she displays visible anger, which is how Watson figures out that something is not right.]]
* ObfuscatingInsanity: As [[spoiler:Irene]], she fakes PTSD and amnesia to keep Sherlock busy taking care of her.
* OffstageVillainy: Things happen by Moriarty's design and order, but rarely at Moriarty's hand.
* OutGambitted: By Watson in "Heroine".
* PetTheDog: Her one unambiguously good act was [[spoiler: giving up her daughter for adoption at birth, knowing full well that not only would a child interfere with her career but that her career plus evil nature would make her a terrible mother for the child, and she actually did want better for the girl.]]
* PlotTriggeringDeath: Moriarty's arranging Irene's death turned Sherlock to heroin, got him fired from Scotland Yard and drove him to New York to seek treatment and rehab, where he met Watson.
* ThePowerOfActing: Fools ''the entire New York City police department'' and Holmes in a fell swoop with this.
* PragmaticVillainy: [[spoiler: She sees no need to escape from prison and become a fugitive. She's content to just sit back and wait for the corruption of the world to just secure her release.]]
* SamusIsAGirl: One of the twists.
* SlouchOfVillainy: Moriarty and Holmes' confrontation in the Brownstone has a bleeding Holmes on the floor and Moriarty casually on a chair.
* SmugSmiler: Had the typical smirk on the face nearly all the time.
* TheSociopath: This version of Moriarty personifies every single aspect of this trope with a more personal and realistic approach. Moriarty blackmails [[spoiler:and kills her/]]his own employees, manipulates people just for fun, doesn't even think twice before ruining anyone's life and uses outright violence without the slightest hesitation, disgust or remorse. In "The Diabolical Kind", she even asks Sherlock, the only one she can relate to, how he manages to empathize with other people and be "one of them".
* SoftSpokenSadist: So far, Moriarty hasn't gone above a normal speaking volume.
* TheStoic: Her real personality - glacially calm and devoid of human warmth.
* StuffedInTheFridge: Invoked and deconstructed. [[spoiler:She fakes her death and counts on Sherlock's guilt to incapacitate him, and thus distract him from her actual plans. [[GoneHorriblyRight It worked better than she expected.]]]]
* TheOnlyOneAllowedToDefeatYou: Rather possessive of people viewed as equals, which is basically only Sherlock. Has issued standing orders that he is not to be harmed in any way, and in "The Female of the Species" [[spoiler: Watson joins the list, as she arranged the murder of Elena March for almost killing Joan.]]
* ThisIsUnforgivable: How Joan reacts to Moriarty's [[spoiler: abusive and manipulative behavior in "The Diabolical Kind", directly warning Sherlock that "she's never gonna change".]]
* TooCleverByHalf: Her scheme to keep Sherlock out of her way led him to fall apart into his addictions and she is truly surprised and sorry about that. Also, her arrogance and extreme self-confidence make Watson - the one she underestimated - able to defeat her and send her to the jail while her 2 billion dollars earned in an assassination are recovered.
* TwoAliasesOneCharacter: [[spoiler:Irene]] ''is'' Moriarty.
* VillainHasAPoint: Moriarty may be a criminal, but it's hard to argue with [[spoiler: her reasons for giving up her daughter for adoption. As she points out, a criminal mastermind does not make an ideal mother.]]
* VillainWithGoodPublicity: Well, after all, she ''is'' a top art restorer respected in Europe.
* VillainessesWantHeroes: Has a very warped obsession with Holmes, whom she views as a work of art she would like to possess. And then, in Season 2, she develops one for Watson as well, to the point of ''painting her face from memory''.
* TheVoice: For awhile we only heard Moriarty's voice through a phone call, but no visuals. [[spoiler:Turns out that it was only one of ''her'' hitmen.]]
* WalkingSpoiler: Just look how much of this entry is in spoiler tags.
* WeHaveReserves: Deliberately sets up two highly efficient assassins, who've each killed over 30 people on Moriarty's orders, to get caught by Holmes and will have any henchmen killed who [[YouHaveFailedMe failed]] or [[YouHaveOutlivedYourUsefulness who have outlived their usefulness]].
* WickedCultured: [[spoiler:As both Irene and Moriarty, especially the latter.]]
* WomanInWhite: In Moriarty's first appearance, she is dressed all in white. Her hair is white-blonde. The ''whole room'' is white.
* WomanOfWealthAndTaste: A characteristic of Moriarty's true personality.
* WorthyOpponent: To Holmes for actions done in London. And has developed the same wariness yet professional respect of Watson for not being as dumb as initially thought.
* WouldntHurtAChild: Not personally, but Moriarty sometimes orders employees like Sebastian Moran to do so.

[[folder: Del Gruner]]
->'''Played by:''' Stuart Townsend

Joan's boss at Leda, introduced partway through Season 3.

* ArcVillain: Of [[spoiler: Kitty Winter's]] arc.
* BenevolentBoss: [[spoiler:It's part of his masquerade.]]
* BitchInSheepsClothing: Your typical psychopath in the guise of a charming businessman.
* TheCharmer: How he seduces women.
* TheChessmaster: Not to, say, Moriarty's level, but he played a mean game, manipulating just about everyone. And he almost got away with it.
* FacialHorror: The consequences of [[spoiler: Kitty's revenge]] leave his entire face in bandages.
* FauxAffablyEvil: He only acts kind and polite. In reality, he's a vicious monster.
* HoistByHisOwnPetard: [[spoiler: He kept one of his victims alive longer than his usual MO after she became pregnant with his child and arranged for the baby to be adopted by a member of his company so he could influence the boy's life. After Holmes and Watson realise this, they're able to use the son's DNA (since it matches both the murdered woman and Gruner) to prove that he is a serial rapist and killer.]]
* LaserGuidedKarma: [[spoiler:Kitty]] is happy to deliver it to him.
* ManipulativeBastard: See TheChessmaster above.
* NiceGuy: But it's only a front.
* TheSociopath: He's spent the last several years torturing and murdering young women. [[spoiler:Kitty was the only one who escaped.]]
* TortureTechnician: As poor Kitty could tell you.
* VillainWithGoodPublicity: A wealthy owner of an insurance company, secretly a rapist.
* WalkingSpoiler: As evidenced by the number of spoiler tags in his tropes.


[[folder: Joshua Vikner]]
->'''Played by:''' Tony Curran

A professor of economics who Sherlock discovers has taken over Moriarty's organization.

* AffablyEvil: Has thus far had cordial communication with Sherlock and Joan, despite the latter not hiding their desire to take him down and Sherlock's obvious attempts to provoke him.
* ArcVillain: [[spoiler: Revealed to be the mastermind behind the assassination attempt on Morland Holmes and is now essentially at war with him.]]
* BigBadWannabe: He may have been Moriarty's hand picked successor, but he's not quite pragmatic enough to fill in. Several of his subordinates note that he's a hammer in situations that require a scalpel.
* TheChessmaster: Selected by Moriarty to a top role in her organization, as well as fathering her child, and Sherlock notes she wouldn't have chosen someone incapable for either role.
* DistaffCounterpart: Vikner is Jamie Moriarty's male counterpart.
* MythologyGag: Vikner is an updated version of the (James) Moriarty from the original stories: a brilliant university professor with a specialty involving numbers (mathematics from the original stories, economics for Vikner) who is also running an international criminal organization. His appearance is similar to how Jared Harris looked playing Moriarty in ''SherlockHolmesAGameOfShadows''.
* WorthyOpponent: Regards Holmes as this, not denying who he is nor being surprised Holmes identified him. Vikner is honestly surprised it took Holmes so long to find him. He doesn't regard Watson in the same way, and is confused as to why Moriarty does.


!!Recurring and Minor Characters

[[folder:Mycroft Holmes]]
-> '''Played by''': Rhys Ifans

Sherlock's brother, with whom Sherlock has a strained and contentious relationship.
* AloofBigBrother: His relationship with Sherlock is so strained that he couldn't even bring himself to tell Sherlock that he was ill and needed a bone marrow donor. He genuinely loves and cares for Sherlock as evidenced by him [[spoiler: saying "I love you, brother" before disappearing in hiding.]]
* AmbiguouslyEvil: [[spoiler: His motives for separating Sherlock from Joan followed by his mysterious phone conversation is a bit suspect. Joan's kidnapping at Diogenes at the end of "The Man With The Twisted Lip" may or may not have been orchestrated by him.]]
** In "Paint it Black", it's revealed that [[spoiler: Mycroft is with MI6, and while he didn't orchestrate Joan's kidnapping, he certainly allowed her to become collateral damage and gambled that Sherlock would find the real person who leaked the Swiss bank list.]]
* TheAtoner: Mycroft is trying to repair his relationship with Sherlock after he was unable to tell him he had cancer and needed a bone marrow transplant. [[spoiler: He also claims that due to the British government's interest in the brothers, his role with MI6 was also his way of protecting Sherlock.]]
* BatmanGambit: The plot of "The Man With the Twisted Lip" and "Paint it Black" [[spoiler: turns out to have been engineered by Mycroft all along. Step 1 - pretend to be a UpperClassTwit and allow French mobsters to set up shop in your New York restaurant. Step 2 - rely on your brother and his partner's connection to the police and natural suspicion to begin investigating said mobsters. Step 3 - when Joan is kidnapped by the mobsters, rely on Sherlock's feelings for his partner to find the information the French mobsters want. Step 4 - when information is acquired, incapacitate Sherlock so your plan won't be disturbed. Step 5 - make the trade for Joan, allow the head of Le Milieu to escape with what is likely a doctored list, and rely on the mobsters to attempt to kill you and Joan. Step 6 - signal for your MI6 sniper team to take the mobsters out.]]
* BigBrotherInstinct: Subverted [[spoiler:at first. While the brothers' relationship is presented as prickly and distant at best, the Season 2 finale reveals Mycroft is extremely protective of Sherlock, despite former evidence to the contrary. He had in fact gotten out of the espionage world, but then Sherlock was used by a terrorist in committing crimes. MI6 offered to drop treason charges against Sherlock if Mycroft rejoined them, and he did so promptly. When Sherlock finds this out, he is visibly confused as to why Mycroft would do this.]]
--> '''Sherlock:''' You... owed me nothing.\\
'''Mycroft:''' You're my ''brother.''
** Mycroft then goes on to [[spoiler: contact the NSA and allow his death to be faked, meaning he'll have to leave his entire life behind and disappear, probably permanently, all because the alternative would mean Sherlock and Joan being killed.]]
* ColorCodedForYourConvenience: Wears solid, often opposite colors, such as his black and white outfit when he's introduced. This is in contrast to Sherlock, who favors a mix of patterns and neutral colors.
* ConsummateLiar: At the end of "Blood is Thicker", we learn that he was lying about [[spoiler:his father's desires to see Sherlock back in London, which implies that he was lying about everything else, especially his intentions with Sherlock and their relationship and his romantic interest in Watson.]]
* TheDutifulSon: His relationship with Papa Holmes seems to be way better than Sherlock's.
* FakingTheDead: [[spoiler:Mycroft's cover was being threatened with exposure, so with assistance from the NSA, he's forced to fake his death and sever his ties with Joan and Sherlock.]]
* FormerlyFat: Sherlock's nickname for him is "Fatty", to which Mycroft claims he lost weight due to exercise. He actually had cancer and had a bone marrow transplant.
* GentlemanSnarker: One of his first lines with Joan shows this clearly.
---> "It's funny that Sherlock's never mentioned me to you. I wonder why that might be? Maybe it's because the last time I saw him he was face-deep in my fiancée".
* IdleRich: Subverted. In Sherlock's opinion, he is this, but runs several successful restaurants and really is good at his work (his restaurant has 2 Michelin stars). [[spoiler: He's also an MI6 agent.]]
* InformedAttribute: Sherlock keeps insisting that Mycroft is lazy and lacking in drive, but as per above, he's a successful cook and restaurant owner and seems to be working steadily at both. Sure, he's [[OvershadowedByAwesome not as hyperactive and super-accomplished]] as Sherlock, but who is?
* ManipulativeBastard: As shown in "Blood is Thicker" he is nearly able to [[spoiler:lie and trick Sherlock into leaving New York for London for some unknown reason by claiming their father will cut him off if he doesn't come home]]. Then he beautifully plays on [[spoiler:Sherlock's companionship with Joan as a motivating point to come home as she has become a dependent on their father's money]].
** In "Paint it Black", he manages to one-up not only himself, but Sherlock as well: [[spoiler: Mycroft and MI6 have been playing GambitRoulette with Le Milieu, Mycroft posing as a UpperClassTwit, allowing Le Milieu a foothold into the States with Diogenes, while he engineers their downfall. He allows Joan to be kidnapped and talks Sherlock into finding who leaked a bank list that many spy agencies and countries would like to get their hands on, tasing Sherlock when he's too close to the truth, and arranging for his team to extract him and Joan when the exchange is made with Le Milieu.]]
* NonIdleRich: He invested his share of the Holmes family fortune into several popular and successful restaurants.
* NotSoDifferent: In "Step Nine", Joan comes to this conclusion about Mycroft and Sherlock and uses these exact words after Sherlock tells her that Mycroft blew up what was left of Sherlock's possessions and considers it a clean slate.
* ObfuscatingStupidity: [[spoiler:He had Sherlock thinking that he was little more than a shallow, womanizing restaurateur.]]
* OutGambitted: In "Blood Is Thicker", [[spoiler: Mycroft tries to make Sherlock move back to London and uses Sherlock's affection for Watson to convince him. Well, he didn't expect Watson's response at all (staying in New York with Sherlock even without money) and his plan failed.]]
* PutOnABus: In the season 2 finale Mycroft is [[spoiler:forced to go into hiding]], and he doesn't appear in the third season.
* SiblingRivalry: With Sherlock, naturally.
* SupremeChef: Owns and operates several successful restaurants, one of which was awarded two Michelin stars. He invites Joan to his restaurant to have a talk with her and admits to trying to soften their chat with some good food and wine.
* TookALevelInBadass: See BatmanGambit and ManipulativeBastard. Seems this version of Mycroft [[spoiler: ''is'' as cunning as Sherlock and is actually an MI6 consultant.]]
* TookALevelInJerkass: When he has to step up his game in "The Man With the Twisted Lip", he becomes highly manipulative toward Joan and then acts like as big a jerk to Sherlock as Sherlock is to him for a change.
* TheTopicOfCancer: Mycroft is a cancer survivor. Joan noticed his transplant scars and conjectures that he may have graft-versus-host disease as a complication. He tells Joan that as a result of his illness, he gave some serious thought to his life and wishes to make amends with Sherlock. [[spoiler:When Joan is kidnapped, Sherlock uses this as an insult.]]

[[folder:Alfredo Llamosa]]
-> '''Played by''': Ato Essandoh
* BrutalHonesty: He doesn't beat around the bush with Holmes.
* CanonForeigner: No literary counterpart for him.
* HiddenDepths: Alfredo initially appears like the least likely person to be a sponsor (and his appearance has hindered him before from being one) but as his meeting with Joan and later Sherlock shows, he is a very patient and supportive person.
* MentorArchetype: Subverted; Alfredo is Sherlock's sponsor and is teaching Joan lock picking, but Sherlock picked him out as a sponsor specifically because he defied a more clean-cut stereotype.
* OnlySaneMan: Teaches Joan lock-picking, but freaks out when she goes to use said skills with the suspect dangerously close by.
* ReformedCriminal: He's a former car thief who now works as a security consultant for car companies.
* TheReasonYouSuckSpeech: Gives one to Holmes in "Dead Man's Switch".

[[folder:Ms. Hudson]]
-> '''Played by''': Candis Cayne

A former 'professional muse' friend of Sherlock's who worked with him on several cases. Becomes official housekeeper at the end of her introductory episode.
* {{Bookworm}}: Taught her self Ancient Greek and is familiar with most if not all the authors in Sherlock's library due to being able to rank their works by intellectual rigeur.
* [[GenderFlip Gender Identity Flip]]: canon Mrs. Hudson was a middle aged cis woman, while in the series she is young trans woman.
* HairOfGoldHeartOfGold: She's very nurturing and kind hearted.
* HotterAndSexier: Not your grandfather's Mrs. Hudson, she; the second most predominant comment after what a positive example of trans representation she is has almost always been "''[[HelloNurse Hello]]'', [[HelloNurse nurse!]]"
* TheMistress: Ms. Hudson's official job description is "[[TheMuse professional muse]]", but she's referred to by Sherlock and herself as a kept woman. [[spoiler: She gives up being one by the end of "Snow Angels".]]
* NiceGirl: She's very pleasant, kind and good-natured.
* SmarterThanYouLook: Ms. Hudson is shown to be very clever and resourceful. She's entirely self-taught in Ancient Greek and is skilled enough to make a fire by herself, the latter due to earning a merit badge for it.
* StatuesqueStunner: She's pretty much the same height as Sherlock.
* SuperOCD: Conjectures that she has a "touch of OCD" that flares up after bad break-ups, leading to her cleaning the entirety of Holmes' and Watson's apartment.
** She organizes Sherlock's library alphabetically by author in descending order of intellectual rigeur.

An old tortoise Sherlock brings home from a crime scene after its original owner was murdered.
* BreakoutCharacter: Clyde the turtle is oddly popular for a character who appears only slightly more often than Mycroft.
* ContemplateOurNavels: Sherlock spends some time to comment on how Clyde will most likely outlive him and Watson.
* EatTheDog: Sherlock initially claims he's taken Clyde home with him with the intention of turning him into turtle soup.
* TeamPet: Instead of eating him, Sherlock decided to adopt him.
* TurtlePower: He's adopted by Joan and Sherlock after his owner is murdered. Sherlock thinks he makes a [[FlippingHelpless good paperweight]] and a good ambulance.

[[folder:Gareth Lestrade]]
-> '''Played by''': Sean Pertwee
* TheAlcoholic: He's often seen drinking from a flask.
* AttentionWhore: Deconstructed. Lestrade's a good detective, but he wants the fame more that comes from solving high-profile cases. He was disgraced and practically laughed off the force when one case blew up in his face. [[spoiler: He falls back into his fame hungry ways after Sherlock solves the case.]]
* BadassInANiceSuit: Invoked, you could say. Lestrade's dressing varies according to his ego: When he's feeling depressed and moopy, he dresses plainly, when he's feeling more confident and badass (or ''wants'' to feel confident and badass) he dresses in a sharp suit.
* BreakTheHaughty: When Sherlock left him, it did a real number on his career. [[spoiler: Got even worse when Sherlock left again. He was reduced to being a glorified pimp, which severely damaged his already fragile self esteem.]]
* BunnyEarsLawyer: Zig-zagged. He is eccentric, but he is not nearly as skilled as Sherlock and far more arrogant. ''But'' we later see he does have some genuine skill to himself, eccentricities apart.
* CowboyCop: He's not afraid to resort to use force or dirty tactics when on a case.
* {{Deconstruction}}: This Lestrade is a deconstruction of the Holmes/Lestrade relationship as depicted in Conan Doyle's earlier stories where Holmes openly despised Lestrade, but let him take all the credit for Holmes' success. The show's Lestrade shows just how damaging and enabling such a relationship would be to Lestrade, especiallly when the secret to Lestrade's success (Holmes) suddenly went away when Holmes fell into drug addiction, leaving Lestrade still craving the limelight, but without the skills needed to actually get it.
** Further deconstructed when it shows that Holmes' constant criticism of him takes its toll as he comes to believe that he is worthless without Sherlock's help.
* DrunkWithPower: His issue with working with Sherlock. The fame got to his head.
* EveryoneHasStandards: He's capable of a lot of morally shady things, but in "The One Percent Solution" we learn that [[spoiler:covering up a murder]] isn't one of them. As he puts it, it is the one thing about him that is non-negotiable.
* FallenHero: He once was a decent detective but the spotlight from "solving" the cases caused him to get a big ego and when Sherlock fell into his drug issues, the facade fell and Lestrade was taken down with Sherlock.
* GreatDetective: Desperately ''wants'' to be one.
* GutturalGrowler: His typical style of speech.
* HeelRealization: In "The One Percent Solution", he realizes his wrongdoings.
* HeroicSacrifice: [[spoiler: Non-lethal variation. The fact he willingly sacrifices his (high-paying, well-respected) job to catch a murderer instills great respect in Holmes and Watson.]]
* HesBack: [[spoiler: InUniverse when at the end of "Ears To You", he manages to return to being a excellent detective on his own.]]
* InferioritySuperiorityComplex: Despite boasting a massive ego, he is terribly insecure about himself, convinced that he is nothing without Sherlock.
* InspectorLestrade: The man himself, though Watson notes that he must be somewhat effective at his job, since Holmes refused to work with several other Scotland Yard inspectors before agreeing to work with Lestrade.
* JerkWithAHeartOfJerk: [[spoiler: Lestrade took credit for Sherlock's work for years, then ignored all Sherlock's attempts to help him and at the end of "Step Nine" took advantage of Sherlock's wit again.]]
** [[spoiler: HiddenHeartOfGold: "The One Percent Solution" shows he's actually a good person deep down.]]
* TookALevelInBadass: [[spoiler: His sub-plot in "Ears To You" shows he's actually become quite clever.]]
* TookALevelInKindness: The events of "The One Percent Solution" display more of his good qualities. [[spoiler: And across the episodes he admits his faults and becomes a much better person.]]

[[folder:Kathryn Drummond]]
-> '''Played by''': Keri Matchett

A former lover and protégée of Sherlock back in London. Works as a profiler and has a dubious character about her work.
* AlphaBitch: One gets the sense she enjoys being in a control.
* DeceptiveDisciple: Holmes once "tutored" her, but he clearly disapproves of her methods.
* EasilyForgiven: Averted. Sherlock did not forgive her for writing terrible stuff about him in a psychological journal back in the day. [[spoiler: [[RoaringRampageOfRevenge Same with the Ennis family]].]]
* JusticeByOtherLegalMeans: [[spoiler: Is willing to fabricate evidence to get what she perceives to be justice done]].
* NotSoDifferent: From Sherlock in some ways, which is another reason why he can't stand her.
* TheProfiler: An expert of the field. The show addresses the doubts over a profiler's efficiency, and her episode explores this.
* WellIntentionedExtremist: Kathryn believes [[spoiler:that the father of Martin Ennis has sexually abused him, but she didn't have concrete evidence to show that he did it, so she paid off Ennis' neighbor to make up a lie.]]
* WorkingWithTheEx: Was Sherlock's lover in London a few years before and worked with him on "The Deductionist".

[[folder:Anne Barker/ Abigail Spencer]]
-> '''Played by''': Laura Benanti

Introduced in episode four of season two, "Poison Pen," she is the nanny for the victim of the week, Titus Delancey. She was also Sherlock's only friend during his time at boarding school. After she was put on trial for murdering her father, she became Sherlock's pen pal. She gained a new identity and became a nanny for the Delancey family. Eventually she takes the fall for Titus' murder in order to protect the real murderer, his son Graham.

* AbusiveParents: [[spoiler:It led to her murdering her father.]]
* BreakTheCutie: Nothing seems to go right for her and things go from bad to worse.
* HeroicSacrifice: The climax of "Poison Pen" can be interpreted this way. [[spoiler:Graham kills his father for sexually abusing him, then frames Abigail, who killed her own abusive father but was acquitted for it. She confesses to the murder because she doesn't want Graham's life to be ruined the way her own father's trial ruined her life.]]
* OnlyFriend: [[spoiler:To Sherlock when they were teenagers. He was bullied a lot during his time at boarding school and beaten up on a regular basis. Her letters were the only good thing from that time.]]
* TraumaCongaLine: [[spoiler:She was horribly abused by her father and accused of his murder. After the trial, she got a new identity only for her new identity to become exposed. She then takes the fall for the murder of her employer to protect his son, who had been abused by his father sexually.]]
* YouAreNotAlone: [[spoiler:When she meets Sherlock in person she tells him how much his letters meant to her. It was really the only thing that got her through such a hard time. Sherlock also confesses to Joan how much Abigail's friendship meant to him.]]

[[folder:Kitty Winter]]
->'''Played by:''' Ophelia Lovibond

Introduced in the season 3 premiere, she is Sherlock's new protégé. Holmes met her in London when he was working for MI6; he realized she had the potential to become a GreatDetective and they solved several cases together. When he returned to New York, he brought Kitty with him.
* ActionGirl: Sherlock taught her single stick fighting, though she still can't beat Joan.
* AnguishedDeclarationOfLove: An unusual anguished declaration of ''platonic'' love in "The One That Got Away". She manages to gasp this out to Holmes, in their final conversation, as she's leaving the country following the resolution of the Del Gruner affair.
* BrainyBrunette: She's a talented detective, and she has dark hair.
* BrutalHonesty: Even more so than Sherlock, sometimes to {{Jerkass}} levels. However, she has a FreudianExcuse, and she gets better as the series progresses.
* ButNowIMustGo: [[spoiler:After she gets her revenge on rapist/murderer Del Gruner (by [[FacialHorror burning his face off with acid]]), she realizes the police will be looking for her (Gregson says as much), so she leaves New York for parts unknown. She calls Sherlock from the airport to say goodbye, and he states that [[SequelHook he may seek her help in the future]].]]
* DeadpanSnarker: She keeps up with Sherlock and Joan, and gets extra marks on the Deadpan part.
-->'''Joan:''' So, did he behave himself while I was gone?
-->'''Kitty:''' That depends. Are you talking about the frowny one with the hard shell, [[BaitAndSwitchComment or do you mean Clyde?]]
* HatesBeingTouched: When Bell tries to direct her away from a tripping hazard, she pulls herself away from him forcibly. However, considering her DarkAndTroubledPast, she has a good FreudianExcuse for this.
* HellBentForLeather: She always wears a black leather jacket.
* JerkWithAHeartOfGold: Despite her abrasive manner, she gradually emerges as one of these.
* PutOnABus: At the end of "The One That Got Away".
** TheBusCameBack: Helps Sherlock and Joan during a two-parter in season five.
* RapeAndRevenge: Her endgame with Dell Gruner.
* RapeAsBackstory: She was a victim of sexual abuse in London, where she was held hostage by a sadistic serial rapist/killer until she escaped (the only one of his victims to do so). Part of the reason she came to New York was to make a new start. This is not far off from her counterpart in canon.
* ReplacementGoldfish: After Watson left him, Sherlock decided that his true calling is as a mentor to budding detectives, resulting in his taking on a new student and putting her through all the same things as Joan.
* {{Revenge}}: When she learns the man who raped her is in New York, this becomes her motivation.[[spoiler:..and she eventually gets it.]]
* ScarilyCompetentTracker: One of her skills. She follows Joan for a long time before Joan realizes it.
* TomboyAndGirlyGirl: Kitty is the tomboy, Joan is the girly girl.

[[folder:Morland Holmes]]
[[caption-width-right:300:''"There are things that money can't buy, but fewer, perhaps, than you'd like to believe."'']]
->'''Played by''': Creator/JohnNoble

Sherlock and Mycroft's father, who became rich and powerful as "an influence peddler par excellence" whose job is "to grease the skids so that politicians and corporations can operate around the globe." Sherlock and Joan (and eventually Gregson) seem to be the only people in his life whom he can't control or buy off.
* AbusiveParents: Was a less than ideal father to both Sherlock and Mycroft when they were growing up.
* AffablyEvil: He is always a perfectly polite gentleman, even when making thinly-veiled threats.
* AnimalMotif: Sherlock compares him to a shark, a mighty, indiscriminate predator that will eventually get want it wants.
* AntiHero[=/=]AntiVillain: He tends to go back and forth between the two throughout the fourth season.
* TheAtoner: Like Mycroft before him, he realizes just how screwed up his relationship with Sherlock is and wishes to make amends. [[spoiler:Although revelations at the end of "The Cost of Doing Business" put into question the sincerity of this. "Alma Matters" then reverses this and makes his sincerity genuine.]]
* BerserkButton: While it pushes him only into a more harsher tone, when Sherlock wants to deny payment for services done to his father, Morland does get angry. He won't not pay Sherlock for consulting rendered.
* CompositeCharacter: Despite being an original character, his "consulting work" makes him eerily similar to Conan Doyle's version of Professor Moriarty, the consulting criminal. [[spoiler: He eventually becomes leader of Moriarty's organization.]]
-->'''Sherlock:''' Perhaps you need sanctions eased against a rogue nation so that you can sell them your tanks or your factories can only spew toxins if the U.S. doesn't sign an emissions treaty. Father can make it so, with the moral neutrality of the plague.
* CorruptCorporateExecutive: He didn't make his money honestly, that's for sure. In fact it's his job to bribe and exhort on behalf of corporations and governments. [[spoiler: He also has no problem claiming responsibility for the assassination of an INTERPOL agent in order to terrify someone, even though he didn't do it.]]
* DeadpanSnarker: "Alma Matters" shows he's quite capable of it.
* DealWithTheDevil: Sherlock views accepting money or help from him in this light. He will be asked favors and other means to repay the debt but Sherlock doesn't imply he will move goalposts either.
* EvenEvilHasLovedOnes: He's as slimy and corrupt as they come, but he clearly does care for Sherlock, even if it's in his own twisted way.
* EvenEvilHasStandards: He comes by his money through dubious means and his actions have caused the deaths of countless innocents, but even Sherlock has to concede that he would never head up an organization that intentionally murders people for profit. [[spoiler: When he does agree to do so, it's for the explicit purpose of tearing said organization down from the inside.]]
* UsefulNotes/TheFalklandsWar: According to Sherlock, he had a hand in starting it.
-->'''Watson:''' Look, I think it's nice that he wants to help, but you know we can't go back to the department-- it's not possible.\\
'''Holmes:''' Neither was war in the Falklands, but the old man tends to get what he wants.
* {{Fiction 500}}: He's rich. ''Very'' rich. His wealth is so known in the banking and higher finance world that Mycroft and Sherlock don't need to craft a false identity to meet some hedge fund managers for an investigation. They just claim they want to invest some of their father's money and the people rolled out the red carpet, complete with a huge table of a variety of delicacies ''just for the two Holmes brothers.''
* HazyFeelTurn: [[spoiler: He becomes the leader of Moriarty's organization, which means he'll have to start doing even more terrible things than even he's used to, but it's for the purpose of eventually destroying the group from the inside.]]
* HeelRealization: [[spoiler: He denies that he's as monstrous as Sherlock makes him out to be, until he learns that the attempt on his life that cost him his girlfriend was all because of him possessing all the qualities required to lead Moriarty's criminal organization in her absence and having the record to prove it.]]
* HeWhoMustNotBeSeen: At least until the fourth season.
* InTheBlood: Just like his sons, he's also a "consultant" for various operations.
* {{Jerkass}}: He was built up as one for a long time, and does not disappoint when he appears in person. While he genuinely wants to help his son, his cold, distant demeanor and amoral methods make it easy to understand why neither Sherlock nor Joan trusts him.
* AnOfferYouCantRefuse: He is more than willing to offer these to people who frustrate him. In "Tag, You're Me" when dealing with a woman who wants to build a resort near where he wants to build a wind farm and she is blocking him, he has evidence that [[spoiler:an endangered species' habitat is partially inside both lands. His employers are going to send a letter out citing this fact and this woman can either be a co-signer, reducing the size of her resort but keeping good face, or refuse and be burned by public anger and other legal issues.]]
* PetTheDog: In "The Cost of Doing Business" he comforts a murder victim's widow, leading both Sherlock and the audience to wonder if he has some decency in him after all. [[spoiler:This seems undone by the end of the episode, where he claims that he had an InterpolSpecialAgent murdered, but "Alma Matters" reveals he didn't actually do it, but did imply responsibility in order to frighten Lucas when the latter attempts to blackmail him.]]
* ReverseMole: [[spoiler: He eventually becomes head of Moriarty's organization so he can destroy it from the inside.]]
* ScrewTheRulesIHaveMoney: He launders money in order to bribe [[spoiler:the DA in Season 4, so Sherlock wouldn't be charged with assault against Oscar Rankin.]]
* TheStoic: Is very cold, non-demonstrative, and dry-witted. As such, Sherlock is constantly [[{{Troll}} trying to get a rise out of him]]. He's unsuccessful. Mostly.
* TheyCallMeMisterTibbs: He doesn't show much reaction when people refer to him by his personal name, but at the end of "The Cost of Doing Business", when [[spoiler: his Interpol contact, Lucas, attempts to blackmail him and in response Morland claimed to have had Lucas's predecessor murdered when he tried asking for more money,]] their meeting ends with:
-->'''Lucas:''' I'm sorry, Morland. I'm very sorry.
-->'''Morland:''' Lucas... (''{{beat}}'') Call me Mister Holmes.


[[folder:Shinwell Johnson]]
->'''Played by''': Nelsan Ellis

A former member of a gang, the South Bronx Killers, trying to make amends. Watson saved his life as a dotor when he was shot in a gunfight and reaches out to him in Season 5. He became a recurring charcter throughout the season.
* TheAtoner: Regrets his actions as a member of SBK and works to bring the gang down.
* BookDumb: He barely has any formal education, but turns out to be a very capable informant with Sherlock and Watson's training and is even able to beat Sherlock at chess.
* KnightTemplar: [[spoiler:Dedicated to his mission to the point of assaulting Sherlock to threaten him and Watson into leaving him alone when they link him to an old murder]].
* ReverseMole: Rejoins SBK to assist the authorities as an informant.
* TheNeedsOfTheMany: He considers his [[spoiler:killing of a fellow SBK member]] negligible in the greater scope of things since he is needed tobring down SBK as an organization.