!Main Characters
!![[spoiler: William]] Sherlock [[spoiler:Scott]] Holmes
[[caption-width-right:350:''"Who cares about decent? The game, Mrs Hudson, is on!"'']]
->'''Played By:''' Creator/BenedictCumberbatch

The hero of the story (of course), Sherlock Holmes is rude, impulsive, selfish, sees little need to observe social niceties he doesn't understand anyway, and is altogether insufferable. He's also one of the smartest men on the planet, who solves impossible crimes often without leaving his flat. The series starts with him receiving a new flatmate in the form of John Watson, who keeps him grounded.
* {{Adorkable}}: When John arrives at 221B while Sherlock's parents are there, Sherlock's attempts to get them out and his attempt at casualness afterwards are hilariously awkward.
** Taken up to Eleven in "The Sign of Three", both as John's best man, and the de facto wedding planner.
* AddictionDisplacement: He outright admits he solves crimes as an alternative to getting high in "His Last Vow".
* AllergicToRoutine: Sherlock has a need for intellectual stimulation that strongly brings to mind a drug addict's desire for the stimulant of their choice, and repeatedly goes to dangerous lengths in order to avoid becoming bored - a trait he shares with his arch-nemesis, Moriarty. However, possibly as a means to complement Sherlock, this particular version of John Watson is heavily hinted to be an adrenaline addict and a thrill-seeker.
* AllOfTheOtherReindeer: In addition to being hated by pretty much the entire police force sans Lestrade, in "The Blind Banker", it is revealed that all his classmates hated him back in school (specifically university) too.
* AmbiguousDisorder:
** Sherlock's behavior alternates from episode to episode between classic UsefulNotes/AspergerSyndrome (difficulty understanding others' emotions, abnormally intense interests, idiosyncratic language) and classic sociopathy (disinhibition, lack of empathy, manipulation of others). John puts forth the former as a diagnosis, Sherlock insists it's the latter. There's a moral dimension to which way one interprets the ambiguity, as an autistic individual is more likely to be able to ''learn'' acceptable social interaction than a sociopath.
-->'''Lestrade:''' I suppose he likes having the same faces back together. It appeals to his... his...\\
'''John:''' [snarkily] Asperger's?
** The sociopathic tendencies predominate in A Study in Pink (taking inappropriate pleasure in horrific but novel crimes), The Great Game (pursuing his goals without concern for the impact they will have on others), and The Hounds of Baskerville (shamelessly manipulating everyone around him, including John).
** Sherlock behaves more like a high-functioning autistic in A Scandal in Belgravia (when he seems genuinely confused by Irene's complex feelings for him) and The Sign of Three (when he can't understand ''why'' everyone has started crying in the middle of his best man speech).
* AntiHero: Sherlock solves crime for fun and not justice, to the point he tells John that heroes don't exist and even if they did he wouldn't be one.
-->'''Lestrade:''' Sherlock Holmes is a great man, and I think one day, if we're all very very lucky, he might even be a good one.
* AnnoyingYoungerSibling: Plays this role to Mycroft throughout The Empty Hearse.
* {{Badass}}: Make no mistake. Sherlock is a very good fighter, in no small part due to his intelligence. He even tries to take on the freakishly huge assassin The Golem during 'The Great Game'.
* BadassBaritone: Benedict Cumberbatch's deep voice suits the character perfectly.
* BadassBookworm: In ''The Sign of Three'', Molly mentions that Sherlock is a graduate chemist.
* BadassLongcoat: Sherlock sports a tailored, woolen one that costs [[http://style.bitchbuzz.com/how-to-get-sherlock-holmess-style.html £1,350]].
* BerserkButton:
** The normally calm Sherlock doesn't take anyone hurting or insulting Mrs Hudson well. [[spoiler:He throws the CIA agent in ''Scandal'' out a second-story window apparently several times for handling her roughly.]]
** Don't mess with John, either. [[spoiler: In ''The Empty Hearse'' Sherlock throws himself into a fire, and pulls John out with his bare hands. In ''His Last Vow'', Sherlock '''murders''' Magnussen when he realizes that it's the only way to save Mary (and by extension, John) from the information Magnussen was using to blackmail her. He seems fully prepared to go to his death as a consequence of doing so.]]
* BigBrotherWorship: If Mycroft's appearances in the mind palace are anything to go by, Sherlock definitely [[AlwaysSomeoneBetter looks up to Mycroft intellectually]], although the way Mental Mycroft belittles his brother indicates that this coexists with a great deal of resentment.
* BreakTheHaughty:
** In "The Great Game", he responds to John [[WhatTheHellHero angrily calling him out on not caring for the victims' lives]] by coolly responding that caring about them won't help him save them, so he won't make that mistake. [[spoiler:Then [[OnlyFriend John]] gets kidnapped and put at risk...and [[ItsPersonal not caring suddenly isn't so easy]]]].
** The entire plot of "The Reichenbach Fall", where Moriarty uses Sherlock's {{jerkass}} pride in his work to slowly destroy the detective's life.
* BrilliantButLazy: ZigZaggedTrope. If he thinks it's worth his while he'll run several blocks, break into private property, or lie and cheat to get information. If he doesn't, his level of laziness has to be seen to be believed:
** In "A Study in Pink", won't lift his hand about three inches to grab the phone John offers him, forcing John to actually place it in his palm.
** In "The Great Game", while fiddling with instruments, Sherlock asks Watson to hand him his phone, which is in his jacket. The one Sherlock's ''wearing''.
** In "A Scandal in Belgravia", gets John to Skype him a view of a crime scene because he doesn't want to get out of bed. Then can't be bothered to get dressed when summoned by the Queen.
* BrutalHonesty: Sherlock's M.O. Used for both comedy and drama: one time he might humorously extort someone with sensitive information, while another John might chew him out for being rude and tactless.
* BunnyEarsLawyer: Treated as one by Mycroft and Lestrade.
* ByronicHero: Embodies all of the major traits of this trope.
* CantHoldHisLiquor: As shown at John's stag night.
* CatchPhrase:
** "Obviously."
** "Not Good?"
** "The game is on!"
* CelibateHero[=/=]CelibateEccentricGenius: Sherlock considers himself [[MarriedToTheJob married to his work]], though that doesn't stop an intense - but brief - relationship from blossoming between him and Irene Adler in A Scandal in Belgravia, the exact romantic/sexual nature of which is not discussed; and then there's the HoYay between him and John Watson that certain fans claim to see all over the place (and which is occasionally referenced in-universe to John's annoyance).
-->'''Creator/StevenMoffat''': It's the choice of a monk, not the choice of an asexual. If he was asexual, there would be no tension in that, no fun in that – it's someone who abstains who's interesting. There's no guarantee that he'll stay that way in the end – maybe he marries. Mrs Hudson. I don't know! [[http://www.guardian.co.uk/tv-and-radio/2012/jan/20/steven-moffat-sherlock-doctor-who (The Guardian, Jan 20th, 2012)]]
** Moffat posits in the same interview that Sherlock dismisses the charms of women because he finds them a distraction, and that he would not be living with a man if he fancied men (because it would also be a distraction).
** Cumberbatch weighed in on the matter to the blog [[http://blog.zap2it.com/frominsidethebox/2012/05/sherlock-season-2-benedict-cumberbatch-and-martin-freeman-match-wits-with-lara-pulvers-dominatrix-irene-adler.html Zap2It]]:
-->'''Benedict Cumberbatch''': For me, Sherlock's not gay. He's not straight, necessarily. He has a sexual appetite, but it's entirely swallowed by his work. He doesn't have time for it.
** Magnussen's "file" reveals that he has a porn preference. It's apparently normal (though he was deep undercover by that point, so it is entirely plausible he completely fabricated said porn preference simply so Magnussen could find it.)
* CluelessChickMagnet: Molly Hooper, Irene Adler, Kitty Reilly and Janine all seem to think so.
* CloudCuckoolander: Owing to his not always paying attention to the world. In spite of his intelligence, he doesn't know who the Prime Minister is and even forgets that England has a queen instead of a king- something he used to know.
** Despite being able to deduce an entire person's life with one look at them, he thought the morning tea that Mrs. Hudson would bring up for him "just sort of happened".
* ConsummateLiar: Demonstrates several times that he is a rather convincing actor, pretending to be various roles as the situation requires. At one point he's so convincing he even fools the ''audience'' for a bit, crying and breaking down before laughing his arse off that John fell for it.
* CrazyPrepared: Had 13 possible plans [[spoiler: to escape Moriarty on the rooftop. Faking his death was one of them, although it's implied that it was a last-ditch option]].
* CreepyGood: Owing to his sociopathic behaviour, even after it gets toned down significantly.
* DeadpanSnarker / TallDarkAndSnarky: Being a self proclaimed high functioning sociopath may make you seem like a massive jerkass, but Sherlock shows how brilliant his wit is.
* [[DefrostingIceQueen Defrosting Ice Prince]]/CharacterDevelopment: Starts treating his friends better over the course of Series 2. Even more so in Series 3.
* DistractedByTheSexy: Irene Adler has this effect on him, to the extent he noticeably stumbles over his words at one point and unwittingly foils a highly top secret and clandestine government plan, all in an effort to ''impress'' her.
** However, it also gets [[NotDistractedByTheSexy averted]] when he pretends to return her advances by holding her hand and staring deeply into her eyes, only to later reveal that he was taking her pulse and checking if her pupils were dilated (to deduct that she was genuinly interested in him).
** During "The Sign of Three", whilst working out a case in his head, he's briefly gets distracted by the mental image of (a very naked) Irene Adler, when musing about the very few people aware of John's EmbarrassingMiddleName.
--> '''Sherlock''': ''*Annoyed*'' [[SheIsNotMyGirlfriend Out of]] [[ThinkUnsexyThoughts my head]], I am ''busy''...
* DitzyGenius: Invoked. Sherlock only keeps important information in his "mental hard drive," which does not include tact, common sense or heliocentrism. He even deletes stuff he used to know, such as there being a queen of England as opposed to a king.
* DrivenToSuicide: [[spoiler:Appears to jump off a building to his death at the end of Series 2. Subverted soon after, when it turns out he faked his death instead.]]
* EeriePaleSkinnedBrunette: Eerie owing to his sociopathic nature, even after it gets toned down a lot.
* EmbarrassingMiddleName: Inverted. [[spoiler: Turns out his first name is actually William.]] Granted, it's a lot less catchy and unusual than "Sherlock".
* EpicHail: Sherlock's solution to getting the police to arrive ''quickly'' is to casually fire a gun into the air!
* EveryoneHasStandards: Even Sherlock seems disgusted at the man who admits to murdering his girlfriend in Belarus, taking obvious pleasure in the fact he will likely get a death sentence.
** He's also appalled in 'The Empty Hearse' at a man pretending to be his stepdaughter's boyfriend to purposefully break her heart. [[YouBastard He even chews the guy out for it!]]
* FakingTheDead: [[spoiler:Faked his own death at the conclusion of "The Reichenbach Fall" to save his friends.]]
* FatalFlaw: His obsessive curiosity and constant need to not be bored leads him to irrational or cruel behavior that damages his relationships with his friends and sometimes even leads him to put his own life in danger.
** His pride and tendency to underestimate his foes also gets him into trouble.
* ForgetsToEat: Cumberbatch [[DyeingForYourArt purposefully lost weight]] to highlight this. From the unaired pilot:
-->'''John''': Aren't you going to eat?
-->'''Sherlock''': What day is it?
-->'''John''': ...Wednesday.
-->'''Sherlock''': I'm okay for a bit.
* FreudianExcuse: It's implied he had a ''very'' unhappy childhood:
** Attempts by his parents to socialize him and Mycroft with other children to make friends failed, miserably. Both Mycroft and Sherlock scoff at the idea years later.
** In Series 3, spending most of his development years with Mycroft is implied to have left a negative effect on his personality.
** Until he met other children he always assumed he was an "idiot" due to only having Mycroft as a companion.
** His mother by his own admission "has a lot to answer for" in regards to how her children turned out.
** [[spoiler: The death of his dog Redbeard hit him ''hard''.]]
* FriendToAllChildren: In "The Reichenbach Fall", he's very concerned about finding the kidnapped children and is very disturbed when they react in fear at seeing him. In "The Sign of Three", he befriends Archie through BrutalHonesty - and a shared interest in bizarre murders.
-->'''Sherlock''': You really do have to wear the outfit.\\
'''Archie''': What for?\\
'''Sherlock''': Grown-ups like that sort of thing.\\
'''Archie''': Why?\\
'''Sherlock''': [[SincerityMode I don’t know. I’ll ask one.]]
* FriendlessBackground: It's ''strongly'' implied that John was Sherlock's first real friend. In ''A Study in Pink'', both Donovan and Mycroft point out that Sherlock isn't the kind of person who make friends.
* GeniusBruiser: While a more skilled combatant such as John can handle him, it's clear that this guy would demolish the average person in a physical fight.
* GladHesOnOurSide: His sociopathy, his despising being bored, and his being NotSoDifferent from Moriarty are frequently brought up, as well as how awful of a prospect it would be if he stopped helping the police and ended up committing crimes for thrills himself.
** The writers speculate in one episode commentary that Sherlock stays on the side of the law as a self-imposed challenge: doing what Moriarty does would be too simple to stay interesting.
* GoodIsNotNice: As he tells Moriarty in "The Reichenbach Fall", "I may be on the side of the angels, but don't think for ''one second'' that I am one of them."
* GrammarNazi: Deliberately corrects the grammar of a prisoner in Minsk at the start of "The Great Game" to make the man confess to murdering his girlfriend.
* GrayEyes: BenedictCumberbatch's [[KaleidoscopeEyes glasz eyes]] can appear icy blue, grey or even slightly green depending on how a scene is lit. This is especially noticeable during his phone call with Mycroft in The Sign of Three, as he paces through several different lighting angles.
* GuileHero: Most of his fights are won through pure observation and intelligence.
* HeartbrokenBadass: During [[spoiler: John's wedding in ''Sign of Three'' when he begins to realize how the marriage will affect their relationship. It upsets him enough that he can't handle staying around for the reception.]]
* HeroesLoveDogs: [[spoiler: As a child he had a beloved pet dog named Redbeard who had to be put down. It's still a touchy subject for Sherlock well into adulthood.]]
* HeroicBSOD:
** Appears to be struck by one ''twice'' in "A Scandal in Belgravia". Firstly, he drifts trance-like into Baker Street after the revelation [[spoiler:Irene Adler is, in fact, alive]]. Later, he seems stunned into inaction for a while once he realises that he has fallen for the [[DamselInDistress oldest trick in the book]].
** Freaks out in "The Hounds of Baskerville", when he experiences fear and doubt for likely the first time in his life.
** Played with in "The Sign of Three" where, after being asked to be John's best man, he stared at John for what is implied to be at least five minutes
** Between the revelation of the Appledore vaults and the arrival of the choppers in "His Last Vow," Sherlock is practically catatonic.
* HypocriticalHumour: During series three, episode three. He comes back to 221B and realizes that Mycroft is inside because the door knocker is straight, and says that he's OCD and straightens it without even realizing it. He then makes it crooked. Watson asks why he did that, and Sherlock's response is a genuine "Did what?"
* IWantMyBelovedToBeHappy:
** Sherlock seems quite melancholy that Molly has moved on from her crush on him to get engaged, but he wants her to be happy. [[spoiler:Not that her engagement works out, anyway.]]
** In Series 3 with John. By the time of [[spoiler: "Sign of Three" Sherlock is well aware that things will be different with him and John since John now has a wife and unborn child to care for, but this doesn't stop Sherlock from doing whatever he can to protect the couple and their happiness. This culminates in him even willing to go off and die to protect John.]]
* IconicOutfit:
** The deerstalker gets this treatment in-universe, to his exasperation.
-->'''Sherlock:''' Why is it always the hat photograph?
** Not to mention his popped-collared BadassLongcoat and ScarfOfAsskicking, which are iconic in-universe and out -- to the point that when Lestrade asks him not to be as... Sherlock... as he usually is, he just un-pops his collar.
* ILoveYouBecauseICantControlYou: Implied with [[spoiler:Irene Adler in "A Scandal in Belgravia". He shares but one meeting with her where his SherlockScan is rendered completely moot on her[[note]]because she introduces herself to him stark naked[[/note]], and it ends with her drugging, violently whipping him and leaving him a slurring, passed out mess on the floor, topping it off by telling him to remember her as "the woman who beat you". When learning she's dead a little while later, he goes into a HeroicBSOD, as commented by John (he "plays sad music, doesn't eat, barely talks"). Although, as it's Sherlock we're talking about, it probably accounts more to a strong fascination than downright love. By the end of the episode however, his dialogue strongly implies that he did develop some kind of feelings for her, also showcased by how, despite her having worked for Moriarty and played a cruel trick on him, he still proceeds to save her life from executioners in Pakistan. Benedict Cumberbatch even hinted that Sherlock and Irene had a "very loving time" there.]]
* InferioritySuperiorityComplex:
** Despite his apparent disdain for "normal people", Sherlock constantly feels the need to prove his brilliance to others.
-->'''Sherlock:''' That's the frailty of genius, John. It needs an audience.
** Goads Lestrade into admitting that Scotland Yard ''needs'' his detective skills.
** Explains every step of his deductions to John to prove they weren't a "trick".
** Plays the Cabbie's suicidal BattleOfWits just to prove how clever he is.
** Screws with Sebastian in "The Blind Banker" after Sebastian remarks that Sherlock's fellow students at university hated him.
** Is rather surprised to hear John call his deductions "extraordinary."
--->'''Sherlock:''' That's not what people normally say.\\
'''John:''' What do people normally say?\\
'''Sherlock:''' "Piss off!"
** May stem from his childhood with Mycroft, in which Mycroft's brilliance led them both to believe that Mycroft was "the smart one" and Sherlock was stupid, until they tried making "friends" with normal people.
* InSeriesNickname:
** Called "[[NiceHat Hatman]]" by the press, due to wearing a deerstalker to hide his face.
** "The Reichenbach Hero" for his most famous case to date.
** "Sir Boast-A-Lot", which Moriarty alludes to while telling a fairytale. According to Irene, he also calls him "the virgin".
** "Shag-A-Lot Holmes" by a paper [[spoiler:who got a falsified scoop from the woman Sherlock was temporarily engaged to.]]
* InsufferableGenius: He really can't help himself, not even after getting tossed out of a courtroom where he's the star witness and into a prison cell for showing off.
* IntelligenceEqualsIsolation: ZigZagged. It's hard to say what came first, Sherlock's incapacity of social interaction, or his aversion of it. Although Mycroft seems to have encouraged distance to others, his friendship with John proves that he is neither above nor averse to relationships with other people as long as it does not hinder his work.
* ItsAllAboutMe: It's entirely likely that Sherlock didn't know the earth revolves around the sun because he thinks that it actually revolves around him.
* JerkWithAHeartOfGold:
** Sincerely apologizes to Molly after offending her in "Scandal"; John is visibly shocked.
** Fantasizes about all the ways he could kill the CIA operative and then throws him out a second story window multiple times after the man harms Mrs. Hudson later in "Scandal".
** [[spoiler:Fakes his own death]] to protect Watson, Mrs. Hudson and Lestrade in "The Reichenbach Fall". Note that he does this by [[spoiler:''jumping off of a building'', likely using the same deductions he used to throw the CIA operative repeatedly out a window with non-lethal results on a larger scale. But he still fakes his death to save those he cares about by jumping off of a building, which still has the somewhat expected results of just nearly killing him instead.]]
** Acknowledges this himself in his best man speech at John's wedding, calling himself an "arsehole" but saying that John makes him better. As "The Last Vow" shows, he'll [[spoiler:get himself exiled on a suicide mission for his sake]].
* KnightTemplarBigBrother: [[spoiler: When it comes to John and Mary's happiness. Unbeknownst to either of them, after deducing that one of her former boyfriends invited to the wedding was still madly in love with her, he took matters into his own hands. He confronted him with the evidence, announced that he'll be downgraded to casual acquaintance and only allowed three visits per year (with John's supervision) and that he will be monitoring him ''closely'']]. To say nothing of ''His Last Vow'', in which he [[spoiler:murders a man in cold blood so that John's wife will be safe.]]
* LackOfEmpathy: Subverted ONLY when it comes to his friends.
* LimitedWardrobe: Black suit, grey coat, dark shirt, blue scarf, black leather shoes. And now, [[http://www.gq-magazine.co.uk/style/articles/2010-08/04/gq-style-news-sherlock-holmes-bbc-get-the-look-clothes-watch a word from the fashion coordinator]].
** Though it does expand to include the "[[MemeticMutation purple shirt of sex]]".
* MadScientist: He keeps a human head in the refrigerator and human eyeballs in the microwave, both of which are being used in "experiments". Enough said.
* {{Manchild}}:
** Especially when he's bored or irritated.
-->'''Sherlock:''' This is childish!\\
'''Lestrade:''' [[DeadpanSnarker Well, I'm dealing with a child. ]]
** Admits it during a conversation with a boy in John's wedding.
--> '''Sherlock:''' Grown-ups like that sort of thing.
--> '''Archie:''' Why?
--> '''Sherlock:''' I don't know. I'll ask one.
** Also from John's wedding:
--> [[spoiler:'''Sherlock:''' You'll be great parents. You've had lots of practice with me.]]
** In ''His Last Vow'', after John has [[spoiler:found him in a drug den.]]
-->'''Sherlock:''' I'm undercover.
-->'''John:''' No, you're not.
-->'''Sherlock:''' Well, I'm not NOW!
** [[spoiler: When Mary shoots him, he temporally regresses into a child inside his mind palace, when looking for a way to maximize his survival chances.]]
* AManIsNotAVirgin:
** Averted. Sherlock claims in the very first episode that neither girlfriends nor boyfriends are his area and he considers himself married to his work. In Season 2, it's explicitly suggested that he is a virgin. But in response to speculation about Sherlock's asexuality, creator Steven Moffat has noted that he sees Sherlock as a heterosexual with a "monk-like devotion to celibacy," while hinting that said devotion may change as the series progresses. Benedict Cumberbatch's personal opinion is similarily that Sherlock does have a sexual appetite, but "it's entirely swallowed by his work. He doesn't have time for it."
** John is in disbelief that Sherlock has apparently never had a "girlfriend, boyfriend, a ''relationship'' of some kind, ''ever''."
** Moriarty's nickname for Sherlock is "The Virgin".
** Even Mycroft mocks his brother:
--->'''Sherlock''': Sex doesn't alarm me.\\
'''Mycroft''': How would ''you'' know?
** In "His Last Vow", Sherlock seduces Janine and lives with her as her "boyfriend" for some time in order to get close to Magnussen. When she finds out that it was all faked and goes to confront him, one of her complaints is that "...just once would have been nice."
--->'''Sherlock:''' I was waiting until we were married.\\
'''Janine:''' ...which was never going to happen!
* ManipulativeBastard:
** Tricks victim's distraught family members into giving him information, lies his way into locked apartments, and so on.
** A particularly egregious example is on his return in the third series. In the Underground below parliament he leads John to believe that [[spoiler: he can't stop the bomb, he hasn't called the police, and they will surely die ]] He begs for forgiveness, complete with quavering voice and tears. And having received John's forgiveness as he reconciles himself to their deaths Sherlock [[spoiler: laughs and turns it into a DidYouActuallyBelieve moment. ]].
** Another brutal example comes from "His Last Vow," when he [[spoiler: seduces and becomes engaged to Janine in order to get access to her employer, Magnussen.]]
* MarriedToTheJob: Celibacy aside, this is the reason he gives for why dating (or human social interaction in general) isn't "his area". You can count the number of people close to him in any sense on one hand.
* MoralityPet: John, Mrs Hudson and Molly all serve to keep Sherlock grounded.
* MotorMouth:
** Whenever he goes into a SherlockScan. It's entirely possible that Cumberbatch doesn't need to breathe; for example, just listen to his explanation of John's phone or much of "Hounds of Baskerville". And whenever [[HelloNurse Irene]] [[TheTease Adler]] is around he somehow manages to go ''even faster''.
** In one interview, Gatiss comments on the extreme length of the deduction in Baskerville; apparently, on Cumberbatch's script he actually wrote "Sorry, Benedict" next to it.
* MustHaveNicotine:
** It's impossible to sustain a smoking habit in London nowadays, so Sherlock confines himself to patches. It just might end up being "a three-patch problem".
** Goes absolutely ''haywire'' in "Hounds of Baskerville" when he's detoxing, turning the entire flat upside down and outright ''begging'' John to give him a cigarette.
** Noted in "The Sign of Three" where a patch can be seen under his shirt.
** Not even hiding the fact that he's smoking [[spoiler:and doing other drugs]] as of "His Last Vow."
* TheNavigator: Has all the streets of London memorized and can predict a cab's likely path and come up with an intercept course in a matter of seconds.
* NiceHat:
** Sherlock's stolen security guard hat.
** The deerstalker in "A Scandal in Belgravia", which also doubles as a MythologyGag.
* NightmareFetishist: He appraises things from a purely intellectual level - not an emotional one - and that can lead into this trope. Grotesque crimes are 'interesting', 'ingenious', or 'elegant'.
--> '''Sherlock:''' Four serial suicides and then a note! Oh, it's [like] Christmas!
* NobleDemon: Freely admits - in fact, insists - that he's a 'high-functioning sociopath'.
* NoSocialSkills:
** Insults his friends, gets on trains covered in pig's blood and holding a harpoon, and visits Buckingham Palace practically naked.
** It wasn't until "The Sign Of Three" that he realized that John actually thought of him as his best friend. And John had to ''tell him''.
* NotSoStoic:
** Whenever John is genuinely threatened or in danger. Stick him in a bonfire, strap a bunch of bombs to him or point a gun at the good doctor's head, and Sherlock's cool mask will evaporate in two seconds flat.
** Also two moments in "The Great Game": When the elderly blind woman begins to talk about the soft voice of the person who kidnapped her, Sherlock frantically warns her against it, knowing that the kidnapper will likely detonate the bomb he has strapped to her as punishment, which he does. Later on, when attempting to solve the riddle of how the painting was faked before the kidnapper blows up a child, he's clearly freaking out. Despite his supposed interest in puzzles over people, the prospect of these two lives being lost deeply disturbs him.
** When Mrs. Hudson is taken hostage, he rescues her, has Watson take her downstairs... and then proceeds to beat the crap out of her attacker and toss him out the window. Repeatedly.
** Is visibly shaken after his "encounter" with the titular creature of ''The Hounds of Baskerville", and even admits his fear to John.
* OddFriendship: On the face of it, Sherlock and John have absolutely nothing in common. However, their shared AllergicToRoutine tendencies end up making them rather inseparable.
* OneManArmy: [[spoiler: At the end of "A Scandal in Belgravia", he wipes out an entire terrorist cell ''single-handedly'', armed only with a [[CoolSword scimitar]].]]
* PetTheDog: His apology to Molly for verbally tearing her apart on Christmas, complete with a sincere kiss on the cheek.
--> '''Sherlock''': Merry Christmas, Molly Hooper.
* PrayerPose: Sherlock uses this pose frequently, but as a sign of concentration while he's thinking, rather than any form of actual prayer or supplication. The books often describe Sherlock as sitting with his hands steepled below his chin.
* RedOniBlueOni:
** The blue to John's red.
** But the red to Mycroft's blue.
* SacrificedBasicSkillForAwesomeTraining: Sherlock's brilliant deductive reasoning comes at the expense of practical knowledge and ability to interact socially.
* ScarfOfAsskicking: Sherlock wears a blue scarf.
* SherlockScan: Naturally! John first endears himself to Sherlock by being audibly impressed at Sherlock's "trick".
--> '''John:''' ''Amazing.''
--> '''Sherlock''' ''(momentarily distracted):'' You do realize you're saying that out loud.
--> '''John:''' Sorry. I'll stop.
--> '''Sherlock:''' [[NotSoAboveItAll No... no, go ahead.]]
* ShipperOnDeck: For John/Mary. He plans their wedding, scares off Mary's ex-boyfriend and [[spoiler:breaks out of hospital with a gunshot wound in order to play marriage counselor to them.]] Though it might be more a case of IWantMyBelovedToBeHappy.
* ShootTheDog: The inevitable result of revealing to a high-functioning sociopath that [[spoiler: killing you is the only way to save his best friend's marriage (and his brother's ability to remain unbiased).]]
* SlasherSmile: Sports an ''[[http://www.joblo.com/newsimages1/sherlock-sociopath.JPG epic]]'' one when he's dealing with David in "The Sign of Three".
--> '''David:''' They're right about you. You're a bloody psychopath!
--> '''Sherlock:''' High-functioning sociopath. With your number. ''*grins*''
* TheSociopath: Played with regularly. Sherlock has all the classic signs of a fictional sociopath: a general lack of empathy; self centered behavior; total disregard for laws; regular use of fake charm, lies and manipulation to achieve his goals; he even goes so far as to call himself one. Ultimately subverted however, since when push comes to shove [[JerkWithAHeartOfGold Sherlock really does care about his friends.]] It's suggested that Sherlock has tried to mold his mind into sociopathic thought patterns in order to function better as a detective.
-->'''Sherlock:''' I'm not a psychopath, Anderson, [[InsistentTerminology I'm a high-functioning sociopath. Do your research.]]
* TheSpock: John even calls him "Spock" in "The Hounds of Baskerville".
* StickyFingers: John's laptop, Lestrade's warrant card, an ashtray from Buckingham Palace, and ''Mycroft's'' clearance ID.
* TheStoic: Shows little emotion most of the time, especially compared to those around him at crime scenes or during an investigation.
* SugarAndIcePersonality: Ice towards almost everyone, but sugar towards his friends, especially later in the series
* TallDarkAndHandsome: Since he's played by Benedict Cumberbatch. Molly noticed.
* TheReasonYouSuckSpeech: Delivers one to ''himself'' in [[spoiler: his best man speech at John's wedding]], pointing out the sheer number of flaws and personality quirks that make him a ''terrible'' person and friend, but which John's patience has helped him to better overcome.
* TooCleverByHalf: His need to be challenged gets the better of him sometimes and he ends up doing things any normal person would back the hell away from.
* TookALevelInJerkass: In Series 2, [[spoiler: which comes back to bite him in the finale.]]
* TookALevelInKindness: Over the course of the series undergoes this due to John's influence, which he admits and credits him for Series 3, by which he's much nicer than he use to be.
* TrademarkClothing: His coat, he makes a point asking for it in "The Empty Hearse". His blue scarves count as well.
* TranquilFury: You'll never realize he's angry until after he's beaten the crap out of you. [[spoiler: Or shooting you.]]
* {{Troll}}: Even when he's not bored out of his mind he can occasionally be an ass to get a rise out of people. Best example is him fooling John [[spoiler: into thinking that they're both about to die since he can't disarm the bomb ''and'' he hasn't called the police]] just to watch him freak out.
* TheUnfettered: Accused of being psychopath by most of Scotland Yard. Also has no problem ignoring 90% of the laws if it'll help him solve a case or help a friend. [[spoiler: In order to protect John and Mary in "His Last Vow" he '''murders''' Magnussen in front of John, Mycroft, and three armed policemen.]]
* TheUnSmile: Invoked to scare the hell out of David. To the audience it's equally hilarious and unsettling.
* UndyingLoyalty: To the Watsons. In particular John.
* UnkemptBeauty: As Shezza, his underground drug addict persona.
* WhatTheHellHero: Gets called out a lot when he says or does cruel things to people around him, mostly by John.
* WhoNamesTheirKidDude: Averted. [[spoiler:Sherlock is his middle name. His first name is William.]]
* YouWouldntLikeMeWhenImAngry: He gets very irratable when he's high off drugs, best not to piss him off.

!!Dr. John Hamish Watson
[[caption-width-right:350:''"''How—'' oh, never mind."'']]
->'''Played By:''' Creator/MartinFreeman

An army doctor who was injured in the war, the series starts with him going to therapy and looking for a flatmate. He becomes one of the first people to appreciate Sherlock's incredible analytical skills, and Sherlock in turn realizes that John's therapist is wrong--he's not having trouble being back from the war because of post-traumatic stress, but because he misses the excitement. John becomes an invaluable aid to Sherlock, especially as his conscience.
* {{Adorkable}}: Doctor Watson. Martin Freeman's support of Woolly Hat Day.
* AllergicToRoutine: As much as he complains about Sherlock's behavior, there's nothing in theory to stop him simply walking away - except, as Mycroft points out, he's nearly as big a danger-junkie himself.
* AngerBornOfWorry: [[spoiler:He reacts to Sherlock being alive by hitting him multiple times.]]
* {{Badass}}: We know (from a blog comment by Bill Murray, the nurse) that he's the recipient of at least one medal, and Sherlock refers to him as a "war hero" during the taxi drive to Brixton.
* BadassAdorable: Whether it's shooting a guy dead under improbable odds, sassing back criminal masterminds who've kidnapped him or ordering around CIA agents who have a gun to the back of his head, chances are he'll be doing it in a cardigan. Also is strongly implied to be one of those people who start celebrating Christmas in October.
* BadassBookworm: He's an ex-army doctor.
* BerserkButton: Actually punches out the superintendent of Scotland Yard because he called Sherlock a "weirdo," probably partly so he'll be arrested as well and can stay with Sherlock, but the fact that he chose ''that way'' to do it says something.
* BewareTheNiceOnes: Though a friendly and laid back man, John is still an ex-soldier. He has no compunction about killing someone if they're putting the people he cares about in immediate danger.
* BigDamnHeroes: In the first episode, certainly.
* BloodKnight: John isn't traumatized by combat so much as he misses it. It's rather downplayed, though, since it's not something John is really proud of.
** Sherlock himself comments on these tendencies after [[spoiler: Mary is discovered as a rogue intelligence agent and John asks whether or not everyone in his life is a 'psychopath'.]]
--->'''Sherlock:''' You were a doctor who went to war. You're a man who couldn't stay in the suburbs for more than a month without storming a crack den and beating up a junkie. [...] John, you are addicted to a certain lifestyle. You're abnormally attracted... to dangerous situations and people.
* BoringYetPractical: Prefers to use diaries and cameras to record data instead of bizarre memory techniques. Also prefers to call the police using a phone instead of a gun, and would like Mycroft to call him instead of kidnap him.
-->"You know ... I've ''got'' a phone. I mean, very clever and all that. But you could just ''phone'' me. On m' ''phone''."
* BrainsAndBrawn: The [[PintsizedPowerhouse Brawn]], to Sherlock's [[InsufferableGenius Brain]].
* TheCaretaker: To Sherlock, going so far as to ditch his girlfriend on New Year's Eve just to make sure that Sherlock doesn’t relapse.
* CloudCuckoolandersMinder: To the point where he can't hold down a regular job at a hospital or clinic since looking after Sherlock ''is'' his full-time job.
* CombatMedic: He is a military doctor, after all.
* TheConscience: To Sherlock, reminding him what is good or at least how to behave in public.
* CurseCutShort: Almost every episode. Most memorably in "The Great Game", when he [[spoiler:opens the fridge in 221B and finds himself staring at a severed head inside]].
** As Series 2 goes on, more of John's curses are left in-episode, mostly to demonstrate that the tone has gotten noticeably darker. He has two particularly PG-13 words in Episode 3.
* DeadpanSnarker: Oh so very, very much. He gets the majority of the most delicious lines of snark in the show. From the very first episode:
-->'''Mycroft''': ''(About Sherlock, after kidnapping John and bringing him to an abandoned warehouse to simply talk to him)'' He does ''so'' love to be dramatic.\\
'''John''': Well, thank God ''you're'' above all that.
* DistractedByTheSexy: Frequently. At Buckingham Palace, he gets so carried away imagining that he nearly drops the fine china.
* EmbarrassingMiddleName: Hamish. He dislikes it so much that Sherlock couldn't goad him into divulging it and only found out by looking at his birth certificate. His middle name becomes a plot point in "The Sign of Three".
* {{Foil}}: To Sherlock. Pretty much an obligatory aspect of his character.
* FriendlySniper / ImprobableAimingSkills: Once shot a guy through ''two'' windows, in ''another building''. With a ''pistol''.
* GenreBlind: To an extent, In ''The Great Game'', Sherlock implies that Moriarty is one of the people who reads Watson's blog. This revelation does not stop Watson from maintaining his blog or putting fairly personal information about him and Sherlock on it.
* GiverOfLameNames: Sherlock is consistently unimpressed with the case titles John comes up with.
* GoodIsNotSoft: One of the sweetest people in the series, but dauntless in the face of intimidation, capture or imminent death. And not above shooting a sufficiently bad man.
* HandicappedBadass: Even when [[spoiler:being affected by the fear drug]] in "The Hounds of Baskerville", he's still the one to kill [[spoiler:the hound]].
* HospitalHottie: Although he's hardly ever in scrubs.
* IfItsYouItsOkay: When he tells Irene he's straight, she implies this about him and Sherlock.
* IncompatibleOrientation / MarriedToTheJob: He started to catch this from being around Sherlock; none of his girlfriends were able to put up with their adventuring for long. Fortunately, Mary adores Sherlock possibly even more than John does - but it's still unlikely they would have got to the point of marriage had Sherlock not been off the scene for a couple of years.
-->'''Jeanette:''' My friends were wrong, you know. You're a great boyfriend - and Sherlock Holmes is a very lucky man.
* InHarmsWay: When your best friend is a crime solving sociopath, [[spoiler: and your wife is a retired professional killer,]] you really have no excuse.
** Lampshaded in "His Last Vow":
-->'''Wiggins:''' Somebody hit me.
-->'''Mary:''' Huh?
-->'''Wiggins:''' Just some guy. ''(stares at Watson)''
-->'''John:''' Probably just an addict in need of a fix.
-->'''Sherlock:''' Yes, I think in a way, it was.
* JumpedAtTheCall
-->'''Sherlock:''' You've seen a bit of trouble too, I bet.
-->'''John:''' Of course, yes. Enough for a lifetime, far too much.
-->'''Sherlock:''' ...Want to see some more?
-->'''John:''' Oh, ''God'', yes.
* TheLancer
* LoggingOnToTheFourthWall: His blog documenting his and Sherlock's adventures, which is widely read in-universe, can be found [[http://www.johnwatsonblog.co.uk/ here]].
* MagneticHero: For someone who doesn’t go out of their way to make friends, people seem to quickly take a liking to him. At any rate, he’s a far more likable hero than Sherlock.
* MinoredInAsskicking: He's generally known for his equanimity, but if you make him angry, you'll know about it.
* MistakenForGay: By Mrs Hudson, Irene Adler, and several of his short-lived girlfriends. At least until he meets Mary.
* MoralityPet: For Sherlock, letting him know whenever he's said or done something "not good".
* MysteriousMiddleInitial: In "A Scandal in Belgravia", John H. Watson finally reveals his much-speculated upon middle name: [[spoiler:Hamish]].
** Which of course lines up with Conan Doyle's canon. For even more speculation, see the pre-season-two debate on DI Lestrade's first name. Conan Doyle only gave an initial (G) which BBC expanded to [[spoiler: Greg]].
* NervesOfSteel: You'd be amazed by how much he goes through completely terrified and yet keeps his calm no matter what. It's telling that the only time we really see him panic is when [[spoiler:Sherlock drugs him with a chemical specifically designed to cause irrational levels of fear]], and even then he keeps his head enough to get to the safest place possible and continually report what's going on.
** There's a FreezeFrameBonus in The Blind Banker where you can see his resume, which says he's a trauma surgeon. That makes him ''combat'' trauma surgeon and people don't get that job without NervesOfSteel on several levels.
* NiceGuy: John Watson is a decent, friendly and moral human being. Just ''don't'' piss him off.
* NothingExcitingEverHappensHere: A variant; John says "Nothing ever happens to me" to his psychologist's suggestion that he blogs everything that happens to him. And then a couple of scenes later, he meets Sherlock...
* TheNotLoveInterest: To Sherlock.
* NotSoAboveItAll: Sherlock's BrutalHonesty has rubbed off on him by the time of Series 3.
* OddFriendship: With Sherlock. He's a military veteran and NiceGuy, while Sherlock is a high-functioning sociopath (moreso initially).
* OnlyFriend: To Sherlock, at least for a ''very'' long time — and everyone who knows Sherlock is amazed that he's even managed that much. And as Sherlock almost affectionately points out in "The Hounds of Baskerville":
-->'''Sherlock:''' I don’t have friends. I've just got one.
* OnlySaneMan: Frequently. Especially when Mycroft and Sherlock are yelling at each other and playing tug-of-war with a bedsheet protecting Sherlock's modesty. In the middle of Buckingham Palace.
** Lampshaded dramatically in "His Last Vow" when Sherlock points out John is attracted to unstable, dangerous people, pointing out himself, Mrs Hudson [[spoiler:(who formerly worked for a drug cartel and was an exotic dancer)]] and [[spoiler:his own wife, who was a CIA assassin.]]
* PintsizedPowerhouse: As seen in "A Scandal in Belgravia", where Sherlock learns it's not a good idea to hit him. John hits back. Hard.
--> '''John''': (has Sherlock in a headlock) You ought to remember, Sherlock, I was a soldier! I killed people!
--> '''Sherlock''': You were a doctor!
--> '''John''': ''[[CrowningMomentOfFunny I had bad days!]]''
* ReactionShot: John's very good at these.
* RedOniBlueOni: The red to Sherlock's blue.
* ScrewTheMoneyIHaveRules: In the first episode, a mysterious unidentified man offers him a generous stipend just to report Sherlock's movements. He scorns the notion.
** All the more striking because he has recurring money troubles and is far more interested than Sherlock in any ''honestly'' earned money that comes their way.
* TheSouthpaw: Played with. Sherlock identifies him as left-handed in "A Study in Pink", but he consistently shoots and throws punches with his right hand. Possibly cross-dominant.
* ShellShockedVeteran: Subverted. He looks like this in the first episode before it's revealed that he's not really haunted by the war, he misses it.
* StatingTheSimpleSolution: Does this often, either to be refuted by Mycroft or Sherlock or to demonstrate how [[ComplexityAddiction averse to common sense the latter can be]].
* StraightMan: More down to earth than Sherlock is.
* SubmissiveBadass: May have a higher kill count than Sherlock, but still defers to his intelligence and for the most part, does what Sherlock tells him to.
* ThrowingOffTheDisability: His limp is psychosomatic, meaning that he can lose it when he forgets about it. In fact, he was actually shot in the ''shoulder'', meaning that his leg is completely fine.
* UndyingLoyalty: To Sherlock, shown on several occasions.
* UnfazedEveryman: From who else but himself? He adjusts remarkably quickly to the weirdness that comes with being Sherlock Holmes's sidekick.
-->'''John:''' We've only just met.
-->'''[[spoiler:Mycroft]]:''' And since yesterday you've moved in with him and now you're solving crimes together. Might we expect a happy announcement by the end of the week?
* VitriolicBestBuds: Him and Sherlock. Hardly a moment passes when they aren’t snarking at each other.
* TheWatson: Well, duh. Occasionally PlayedForLaughs.
--> "''How—'' oh, never mind".
* WeirdnessMagnet: [[spoiler: Sherlock implies he's naturally attracted to this, although only unconsciously. Mary agrees]].
* WhatTheHellHero: If Sherlock's getting one of these, chances are good that John will be the one lecturing him, and chances are that he'll be the only one Sherlock will even try to listen to.
* WithFriendsLikeThese: With Sherlock and cranked UpToEleven in "The Hounds of Baskerville" when [[spoiler: Sherlock drugs John and then locks him up in a lab to conduct an experiment that involved scaring the crap out of John, a war veteran who still suffers from nightmares and flashbacks related to the battlefield]]. It's surprising that John didn’t at least take a swing at him afterwards.
* WouldntHitAGirl: Violence against women seems to bother John. He's notably guilty about [[spoiler: Soo Lin's]] death in "The Blind Banker", becomes noticeably distressed at the crying woman in "The Great Game", and while he had no problem punching the Superintendent of Scotland Yard for calling Sherlock a "weirdo", he ignores Sally Donovan rubbing it in that Sherlock was not to be trusted.


[[folder:Jeff Hope]]
!!!Jeff Hope (Phil Davis)
[[caption-width-right:256: "It's not chance, Mr. Holmes, it's chess. It's a game of chess."]]

The killer in "A Study in Pink," who has a sponsor and receives money for his family for every kill.
* AdaptationalVillainy: The literary version of him was a SympatheticMurderer who targeted {{Asshole Victim}}s for hurting the people he loved. Here he's a SerialKiller whose motivation is much less sympathetic, targets completely innocent people, and is overall much more cold-blooded and cruel.
* AlmightyJanitor: His career is rather dull and unimportant, yet he shows himself to be rather intelligent and calculating. He lampshades that someone like him who [[spoiler:drives a cab]] doesn't look all that bright.
* AloneWithThePsycho: A variation. Sherlock actually ''volunteers'' to be alone with the psycho because aforementioned psycho's promised to tell Sherlock how he's been committing his murders.
* BeneathNotice: As he says, nobody ever thinks about the [[spoiler:cabbie]]. It's like he's just a back of a head. He's able to take advantage of his job to hide in plain sight and be inherently trusted by his victims.
* CutLexLuthorACheck: He's very intelligent but working in a low income job, even Sherlock lampshades it:
--> "Either way you're wasted as a [[spoiler: cabbie]]."
* TheDogWasTheMastermind: There was some subtle foreshadowing about what the character's profession was, but the character himself is never introduced, nor is he ever clearly seen onscreen, until the climax of his episode.
* DrivenToSuicide: It looks like this is what he does to his victims. [[spoiler:It turns out he's forcing them at gunpoint to choose between two pills, one of which is poisonous.]]
* EvilOldFolks: His exact age is unknown but he's definitely getting on in years.
* FauxAffablyEvil: His ''tone'' is certainly friendly and cordial, but the actual content of what he says shows him to be a pretty massive asshole.
* FourEyesZeroSoul: His glasses only add to the eerie appearance that he has, although they're more subtle than most cases of this trope.
* LackOfEmpathy: He doesn't seem particularly bothered by the fact that he has to kill people [[spoiler:in order to secure money for his children]]. In fact, he seems to like killing and holds most people in contempt.
* LoveMakesYouEvil: [[spoiler:The entire reason behind his killings is because, once he's dead, there'd be no income to provide for his children. Moriarity acts as a "sponsor," paying him loads for each person he kills.]]
* ManipulativeBastard: He's able to play on Sherlock's constant curiosity and desire for excitement to get Holmes to, [[AloneWithThePsycho not only go alone somewhere with him]], but also to play the "game" even when there’s no reason for Sherlock to do so. His game also depends on manipulating people based on what he's deduced about them and what he believes they've deduced about him.
* NeverSuicide: The entire plot of his episode really. Though since these are "serial suicides" it's kind of obvious.
* NiceHat: Sports a nifty flat cap.
* NoNameGiven: His name is only revealed in the credits, and even then his last name's not given.
* NotAfraidToDie: Whenever he plays his "game" with his victims, there's a good chance he could die too but he just doesn't seem to care. Most likely it's a combination of this trope due to [[spoiler:the knowledge he's dying anyway]], and confidence that he'll always be able to outsmart his opponents.
* PapaWolf: The more people he kills, the more money Moriarty gives to his children.
* PoisonedChaliceSwitcheroo: [[spoiler:His method of killing involves offering his victims a choice between two identical pills, one of them harmless, the other poisoned.]]
* SerialKiller: He's murdered at least four people and he aims to take a fifth in Sherlock Holmes.
* SmartPeopleWearGlasses: He may not look it, but he is a genius behind the simplish look.
* SmugSnake: While he is a very clever man, as proven by how he's managed to survive four rounds of his "game," his arrogance, cold-bloodedness and firm belief in the stupidity of everyone around him does little to earn anyone's admiration.
* StarterVillain: He's the villain of the first episode of the series, and, while clever and dangerous enough to arouse Sherlock's interest, he's just the opening act for Moriarity.
* SurroundedByIdiots: At least in his own opinion
--> " Between you and me sitting here, why can't people think? Don't it make you mad? Why can't people just think?"
* TakeAThirdOption: If anyone tries to refuse his game, he offers them a bullet from his gun instead. [[spoiler:Gun's a fake.]]
* TheyLookJustLikeEveryoneElse: He's a perfectly ordinary-looking man, which aides him in committing his murders.
* WorthyOpponent: While he talks about all his other victims as if they were idiots, he seems to hold Sherlock in some regard. Granted he still thinks Sherlock's not as smart as him, but he's conversational with him and even compliments Sherlock on the ideas Sherlock's put on his website.
* YourDaysAreNumbered: [[spoiler:He has a life-threatening aneurysm, meaning he lives with the knowledge any breath could be his last.]]


[[folder:Jim Moriarty]]
!!Jim Moriarty
[[caption-width-right:350:''"Every fairytale needs a good, old-fashioned villain."'']]
->'''Played By:''' Creator/AndrewScott

Sherlock's biggest fan and his arch-nemesis before Sherlock even knows he exists. He has a vast criminal network that he manages largely as a way to stave off the boredom of a world that poses no challenges for his incredible intellect.
* AlwaysSomeoneBetter: As smart as Sherlock is, Moriarty is just as brilliant and has none of Sherlock's [[TheUnfettered self-imposed constraints.]]
* AmbiguouslyGay: He claims he's not gay, but he ''delights'' in flirting with Sherlock regardless. Andrew Scott coming out as of 2013 doesn't help either.
* ArchEnemy: Sherlock and Moriarty's relationship shows many traits connected with the trope.
** ItsPersonal between them? Check. Moriarty is obsessed with Sherlock and Sherlock [[spoiler: keeps his own version of Moriarty in his Mind Palace]].
** TheHero and his EvilCounterpart? Check.
** WorthyOpponent rivalry? Check.
** NotSoDifferent? Check. Moriarty is what Sherlock could become if he'd let his quirks, boredom and anti-social behavior overcome his mind and morality. [[LampshadeHanging Lampshaded]] by their talk on the roof.
** Moriarty is the BigBad of Seasons 1 and 2, which makes him the most consistent enemy for Sherlock to fight - another trait of the ArchEnemy which may explain why [[spoiler: Moriarty may return in Season 4]].
** His ArchEnemy status is consistent with Sir Arthur Conan Doyle's stories.
* AteHisGun: Puts a gun in [[spoiler:his own mouth and blows his brains out in "The Reichenbach Fall", ForTheEvulz.]]
* AxCrazy: Though more in the way of telling other people to kill people, rather than assaulting them himself.
* BadassBoast: "The man with the key is king, and honey you should ''see me in a crown''."
** "Sorry boys! I'm ''sooo'' changeable! It is a weakness with me, but to be fair to myself...it is my ONLY weakness."
* BadassInANiceSuit: Westwood, to be precise.
* TheBadGuyWins: Destroys Sherlock's reputation in "The Reichenbach Fall", [[spoiler:forcing Sherlock to fake his own death for a full 2 years.]]
* BewareTheSillyOnes: Go ahead, laugh at him. See what painful punishment he comes up with.
* BigBad: Every major antagonist in Series 1 and 2 either answered to or was advised by him. [[spoiler:He's supposedly back from the dead to return as the BigBad for Series 4.]]
* BoringInsult: Invoked. According to him, the most heinous insult to someone like him or Sherlock is to be "boring".
-->'''Moriarty''': I'm disappointed, I'm ''disappointed'' in you, ''ordinary Sherlock''.
* BreakThemByTalking: Moriarty has developed this to an art form.
* CampStraight: Keeps up his {{Camp}} persona after [[spoiler:revealing his identity to Sherlock]]. Also delights in flirting with him, calling him "sexy" and "honey". As always, it's hard to tell what really motivates him.
* CardCarryingVillain: Is openly proud of being reprehensibly evil. [[spoiler: He even gave Sherlock his card.]]
* TheChessmaster: In Series One, he's behind ''every'' case Sherlock investigates. In Series Two about the only one he wasn't involved in was an actual accident.
* ConsummateLiar: To the point where he can claim to be the former host of a children's TV show, and have an astounding amount of evidence to back it up.
* DangerouslyGenreSavvy:
** As "Scandal" shows, if it comes down to a choice between baiting Sherlock Holmes and his actual job, he'll pick the job. After all, crime is a heavily trust-based business.
** In "The Reichenbach Fall", he plays -- and ''wins'' -- GambitRoulette with both Holmes brothers and forces Sherlock to [[spoiler: fake his own suicide or risk John, Lestrade, and Mrs. Hudson's deaths. Although in Season 3, Sherlock claims he and Mycroft were playing Moriarty all along]].
* DeadpanSnarker: When he's not giggling.
* DeathSeeker: Jim's excruciating boredom with the world leads him to try get Sherlock to kill them both at the end of series 1, simply because it'd be ''fun''.
* DiabolicalMastermind: He's a "consulting criminal" behind dozens of illegal schemes.
* DiesWideOpen: Complete with [[spoiler:a ''seriously'' creepy smile after having supposedly blown his brains out, though his return at the end of "His Last Vow" has thrown the "Dies" part into question]].
* DoNotAdjustYourSet: Takes control of [[spoiler:every TV set in Britain for his return at the end of "His Last Vow".]]
* DrivenToSuicide: [[spoiler:Zig-zagged. Looks suicidal when he realizes that in destroying Sherlock, he's actually won, and now has nobody who will pose a challenge to him anymore. Then changes his mind and says he'll manage. Unfortunately Sherlock then convinces him that as long as Sherlock has Jim alive, Sherlock can also stop Jim's plan. Moriarty promptly shoots himself in the head to make sure Sherlock can't beat him.]]
** [[spoiler:Possibly subverted at the end of "His Last Vow".]]
* EvilCounterpart: To Sherlock. In this version, he lists his occupation as "Consulting Criminal", and his InsufferableGenius tendencies are played up just as much as Sherlock's. His goal, as it turns out, is to find [[spoiler: a perfect counterpart -- someone who ''is'' him]]. Sherlock indulges him, in the end, and admits as much. [[spoiler:He may well have faked his own suicide, to boot.]]
* {{Expy}}: Aspects of Jim's personality are similar to that of Moriarty expy [[Disney/TheGreatMouseDetective Professor Ratigan]].
* FauxAffablyEvil: Makes him even creepier.
* FoeRomanceSubtext: Invokes it with Sherlock, every chance he gets.
* FoeYayShipping: In-universe, no less, judging by one of the members of Sherlock's fanclub who puts forward the theory that [[spoiler: Sherlock and Moriarty faked their deaths to run off into the sunset together!]]
* ForTheEvulz: Has no real reason behind his cruel EvilPlan except that he is a psychopath and he "got bored". [[NotSoDifferent Remarkably like our hero, in fact.]]
--> '''Sherlock''': People have ''died!''
--> '''Moriarty''': That's what people '''DO!'''
* GigglingVillain: His laughter is truly creepy.
* GoOutWithASmile: [[spoiler:Grins right before shooting himself in the head in "Reichenbach Fall".]]
* KarmaHoudini: He's [[spoiler:DrivenToSuicide]], but this is only done as a way to ensure Sherlock can't wriggle out of his EvilPlan.
* KnightOfCerebus: The series was never the most lighthearted, but there was plenty of humour. When Moriarty enters as an indirect antagonist, the death toll escalates and the show gets darker. When he appears in person, things get seriously disturbing.
* LargeHam: His [[GigglingVillain high-pitched voice]] and [[PsychopathicManchild psychopathic mannerisms]] make him constantly appear on the edge of psychotic madness. He also changes his tone of voice and his mannerisms about every other line, rapidly going through affected personas and acting styles just to mock Sherlock. He's ''always'' hammy, though.
* TheMadHatter: He's out of his damn mind and proud of it.
* ManOfWealthAndTaste
-->'''Jim:''' ''(Straightens suit)'' Westwood!
* ManipulativeBastard: He is ''really'' good at this.
* MoodSwinger: ''Holy shit''. He goes from calm and collected to practically screaming in about two sentences. He even acknowledges it.
-->'''Jim''': Sorry boys! I'm ''sooo'' changeable!
* MyDeathIsOnlyTheBeginning: "His Last Vow" ends with [[spoiler: his image appearing on every screen in the United Kingdom, suggesting he had plans in place even in the event of his death, if he even died at all]].
* NotSoDifferent: To Sherlock, being basically a true sociopath. It means that people start assuming Sherlock made him ''very'' easily.
* ObfuscatingStupidity: Poses as Jim from IT, a seemingly dumb and weak-minded guy.
* PosthumousCharacter: In Series 3, he appears as a mental vision in Sherlock's mind, tormenting him further. He also appears in a few flashbacks or ImagineSpot moments.
* PostMortemComeback: ''Maybe''. He appears at the end of "His Last Vow" [[spoiler:via [[DoNotAdjustYourSet mass broadcast around the UK]], but it's unclear if he's dead for real or not.]]
* PsychoForHire: He acquired his wealth and connections by working as a "consulting criminal". Once Sherlock gets his attention, he's happy to cut loose several clients as part of the game.
%%* PsychopathicManchild
* SecretIdentityIdentity: Until he and Sherlock meet at the end of the first series.
* ShadowArchetype: He's Sherlock if our protagonist had decided to commit crimes rather than solve them to pass the time, and didn't have the [[MoralityPet moral guides]] of John, Mrs Hudson, Molly, and Lestrade (plus the ones that followed as he TookALevelInKindness).
* SissyVillain: How Jim liked to portray himself to Sherlock, [[NotSoHarmlessVillain at]] [[KnightofCerebus first]].
* ASinisterClue: [[RewatchBonus If you watch closely]], when Sherlock hands him a cup of tea he gives it with the handle on the right side and Moriarty irritably turns it around to pick it up.
* TheSociopath: A genuine example, unlike Sherlock.
* SuddenlyShouting: Tends to shout certain words for emphasis when upset.
--> '''Sherlock''': People have died.\\
'''Moriarty''': That's what people '''''DO'''''!
* ThanatosGambit: [[spoiler:"The Reichenbach Fall". To ensure that there is no way for Sherlock to stop his plan, he ''kills himself'', thus forcing Sherlock to commit suicide to protect his loved ones.. apparently all ForTheEvulz.]]
* TheUnfettered: Ultimately a deconstruction. Having absolutely no empathy and no limits, Jim's one and only concern is to try and stave off his endless boredom... even if that means putting his own plans and well-being at risk to do it. Best illustrated in the second series finale [[spoiler:where Moriarty gleefully '''shoots himself in the head''' for no reason other than he thinks it's the best way to "win" his game with Sherlock.]]
* UnwittingPawn: Makes one out of Molly Hooper, Sally Donovan, and [[spoiler:the entire British legal system and tabloid press in "The Reichenbach Fall".]] Such is his {{Manipulative Bastard}}y that he even makes pawns out of ''[[spoiler:the Holmes brothers themselves''. Although Sherlock claims in season 3 that Moriarty was the one being played all along.]]
* [[UsefulNotes/IrishAccents Irish Accents]]: Moriarty's is a Dublin 4 accent, usually associated with being obnoxiously upper-middle-class.
* VictoryIsBoring: As Sherlock points out, there is nothing that Moriarty can't already steal or buy. No problem presents a challenge for him. And Jim absolutely ''can't stand'' it. (This is one of the creepy Holmes/Moriarty parallels.)
* WouldHurtAChild: He threatens to blow up one in "The Great Game". In "The Reichenbach Fall", he poisons two more and almost kills them, as they could play into his plans well.
* YoureInsane: Sherlock says this to Moriarty in "The Reichenbach Fall".
-->'''Moriarty''': [[CaptainObvious You're]] [[InsultBackfire just getting]] [[CardCarryingVillain that now?]]

[[folder:Irene Adler]]
!!!Irene "The Woman" Adler
[[caption-width-right:350:''"Do you know the problem with a disguise, Mr Holmes? However hard you try, it's always a self-portrait."'']]
->'''Played By:''' Creator/LaraPulver

'''The''' Woman, perhaps the only person to ever consistently flummox Sherlock Holmes. She's a dominatrix who first enters the story due to blackmailing the royal family.
* AdaptationalBadass: In the original stories, Irene Adler's impressive feat was simply seeing through Holmes' ruse, pulling one in turn, and then having the good sense to skip town while she has the chance. Here, she manages to [[spoiler:con him into decoding top-secret, vital information which she then passes along to Moriarty, ruining Mycroft's day]]. It takes a last-second epiphany for Sherlock to recover himself and make up for his own royal screwup.
* AdaptationalVillainy: In the original short-story, Irene just wanted to be left alone.
* BadassBoast: "This is how I want you to remember me...the woman who beat you."
* BigBadWannabe: For all of Irene’s cleverness, it’s still clear that she wouldn’t have gotten away with as much [[spoiler: without Moriarty’s assistance. This is made more evident after she loses his support, and is captured and almost put to death.]]
* BitchInSheepsClothing: She may not have been a sweetheart when she was introduced but by the time the episode ends, it’s revealed [[spoiler: that she’s complicit in terrorist plots and Moriarty's willing accomplice]].
* BiTheWay: She's been in relationships with both men and women prior to meeting Sherlock.
* BrainsAndBondage: A dominatrix who caters to the highest echelons of society. One of very few people to get several over on Sherlock Holmes.
* BrainyBrunette: Brown hair and nearly as smart as Sherlock.
* BrokenBird: She's very clever, but also clearly rather damaged; Irene routinely drugs her 'friends', keeps blackmail material on her phone just in case she needs it and her career is sex- it's not fun, it's a job.
* TheCameo: Irene very briefly appears in Sherlock's mind palace in "The Sign of Three", suggesting that Sherlock still thinks about her sometimes. She's completely naked, naturally.
* {{Catchphrase}}: She mentions a couple of times she knows somebody, then amends, "Well, I know what he/she likes."
* TheChessmaster: Outplays ''both'' Holmes brothers, at one point.
* DarkActionGirl: She can handle herself in a scrap, as seen when she and Sherlock are ambushed in her drawing room, she easily disarms and pistol-whips her attacker.
* {{Dominatrix}}: Mycroft specifically describes her as such.
* EasilyForgiven: She was perfectly willing to [[spoiler: extort the British government for millions, enlist the skills of a psychopath, aid in a terrorist plot, and manipulate and betray Sherlock]], yet she [[spoiler: still gets saved by Sherlock in the end and lives without any apparent consequences or moral development.]]
* ExcessiveEvilEyeShadow: Prior to meeting Sherlock, she is seen liberally applying copious pearlescent eye-shadow and blood-red lipstick.
* FakingTheDead: ''Twice''.
* FemmeFatale: A classic example.
* FemmeFataleSpy: One of her many tricks for stealing blackmail material.
* FetishFuelStationAttendant: In-universe. It comes with [[{{Dominatrix}} the job]].
* FunWithSubtitles: When Sherlock does his trademark scan, a subtitle floating beside the clue says what he's noticed. When he first meets Irene, all his scans get is "???????".
* JerkWithAHeartOfJerk: Let's be honest, whether she has feelings for Sherlock or not, it still doesn't stop her from treating him terribly or [[spoiler: excuse her for working with Moriarty]]. She's made it pretty clear all through that episode that her self-interest comes before anything else.
* KarmaHoudini: For all the havoc and damage she caused, [[spoiler: she still gets to survive in the end.]]
* LaserGuidedKarma: She does everything she can to exploit Sherlock’s naivete when it comes to sex and intimacy but in the end [[spoiler: her own feelings for him prove to be her downfall.]] Verges on DramaticIrony.
* MsFanservice: Struts into the drawing room to greet Sherlock stark naked.
* NakedOnArrival: Pulls this on Sherlock to defeat his [[SherlockScan trademark scan]]. Can't tell anything from a person's clothes if they're not wearing any, right?
* NoSell: When first meeting Adler, [[SherlockScan Sherlock's scan]] can only come up with "??????"
* NotEvenBotheringWithTheAccent: Admittedly, she might not be from NewJersey in this version, but the fact Pulver uses her normal accent is a notable departure from past portrayals of the character.
* RomanticTwoGirlFriendship: With Kate, her lover/assistant.
* ShowSomeLeg: Calculates that showing some leg would simply be analyzed for what it is by Sherlock. So she takes it UpToEleven.
* SilkHidingSteel: Elegant. Ruthless.
* SingleTargetSexuality: Caters to both [[BiTheWay male and female]] clients, claims to self-identify as being gay, yet the only man (or indeed anyone) she actually shows any ''serious'' interest seems to be [[DatingCatwoman Sherlock]]. [[spoiler: Her chosen password is particularly telling.]]
--> ''[[spoiler: I Am SHER Locked]]''
* {{Troll}}: She loves to troll Sherlock, even leaving her ImmodestOrgasm as his ''ringtone''.
* UnusualEuphemism: At one point, her occupation is described as "recreational scolding".
* TheVamp: A dangerous, beautiful woman who uses sex as a tool to get what she wants.
* VillainessesWantHeroes: Very much taken with Sherlock.
* WomanOfWealthAndTaste: The phone everybody was fighting for in "A Scandal in Belgravia" was a Vertu Constellation Quest smart phone, with a price tag of £17,300. There was more than one reason she was fighting tooth and nail to get it back.
* WhipItGood: ''Introduced'' holding a riding crop, which features extensively in her website's photos, and [[{{Dominatrix}} uses it for reasons very different from Sherlock's]].

[[folder:Charles Augustus Magnussen ]]
!!Charles Augustus Magnussen
[[caption-width-right:350:''"Knowing is owning."'']]
->'''Played By:''' Lars Mikkelsen

A media mogul who owns the majority of Western civilization through very careful application of blackmail.
* AchillesHeel: Magnussen stores all the information about his victims not on a computer, which would be hackable, but in hard copy form in a vast underground vault underneath his high-security home. Only he has access to it, and he doesn't let anybody in. [[spoiler:...Except that he doesn't. There is no such vault. He just remembers it all. As a result, Sherlock is able to eliminate Magnussen as a threat by shooting him in the head.]]
* AdaptationalBadass: His literary counterpart was content blackmailing England's nobility and gentry, specifically ladies, who were either married or engaged. Here he's blackmailing world governments, and [[spoiler: instead of keeping all of his information in a locked safe, he keeps it all in his own head.]]
* AdaptationNameChange: From Milverton to Magnussen.
* AlwaysSomeoneBetter: Sherlock's hatred of him is exacerbated by the fact that Magnussen is genuinely smart enough to outwit him.
* AssholeVictim: [[spoiler: He's so cruel and unlikable, you can't help but cheer Sherlock on when he shoots Magnussen in the head.]]
* BigBad: He's the one for Series 3.
* {{Blackmail}}: Specializes in extortion.
-->'''Sherlock''': ''...he attacks people who are '''different''' and preys on their secrets!''
* BoomHeadshot: Sherlock [[spoiler:shoots him in the head after he makes it clear that if he dies, his information goes with him.]]
* TheBully: What he basically is, and the specific reason Sherlock hates him as he picks on people for being different, hinting at a bit of bullying in Sherlock's own past.
* BullyingADragon: Seriously, revealing [[spoiler: that there are no physical Appledore vaults, that all the information is in his head, and there are no tangible copies of data or backups or contingencies that can be disseminated in the event of his death to cause chaos, and then being utterly unrepentant and physically humiliating the people who hate him and want to stop him. Did Magnussen really not consider someone would be desperate or stupid or self-sacrificing enough to simply kill him where he stood? Because that is the one thing that will easily and definitively eliminate the threat of his blackmail scheme by leaving all that sensitive information completely dead inside his equally dead brain.]]
* CardCarryingVillain: To the people he's blackmailing. In public, he presents himself as a simple businessman. [[DefiedTrope Defied]] at the end, though -- he mocks Sherlock and John precisely for treating him like some kind of villain. He seems to honestly believe that he ''isn't'' a villain due to some InsaneTrollLogic like, for instance, the fact that he technically hasn't killed anyone (even though he has ruined several lives and puts others in mortal danger, both for his own amusement).
* TheChessmaster: His ultimate goal in Series 3 is [[spoiler:to get leverage on Mycroft to blackmail and control him]]. He achieves this by blackmailing [[spoiler:Mary]], then manipulating Sherlock and John when they react as he expects they will, relying on a series of "pressure points" to control the involved parties. [[spoiler:Once Sherlock implicated himself in high treason by trying to sell him Mycroft's laptop full of government information, Magnussen would have the leverage he needs to get to Mycroft.]]
* CompositeCharacter: Largely based on Charles Augustus Milverton, from the short story of the same title. However, the larger scale of his activities, the "Napoleon" nickname, his appearance and personality, and the events in his brief meetings with Sherlock, make him a more faithful depiction of Moriarty as he originally appeared in the Conan Doyle stories than the ''Sherlock'' Jim Moriarty is.
* CorruptCorporateExecutive: In addition to his blackmailing activities, he has no problem printing false information in his papers.
* DangerouslyGenreSavvy:
** He keeps all his information in an underground vault in hard copy, because computers are hackable. [[spoiler: Taken further when we find out there is no vault. He's able to '''memorize''' '''everything''', by having his own version of Sherlock's mind palace. Further, while he has no physical evidence of anything he knows, the people he blackmails don't know that. And besides, he's a media mogul - his newspapers don't ''need'' proof to print the stories.]]
* DeadpanSnarker:
-->'''John''': I don't understand.\\
'''Magnussen''': You should put that on a t-shirt.\\
'''John''': I still don't understand.\\
'''Magnussen''': And there's the back of the t-shirt.
* DirtyCoward: No problem with begging for his life.
* DirtyOldMan: He can go anywhere from small, simple actions and words that will leave your skin crawling, to licking a woman's face.
* DoesThisRemindYouOfAnything: His interactions with his victims '''strongly''' resemble those of a rapist (and in Britain, forcibly licking someone like that counts as sexual assault).
* TheDreaded: Sherlock mentions that Magnussen is the most dangerous threat he's faced up to that point and nobody's ever made his stomach turn quite like Magnussen.
* EvilCounterpart: Another one to Sherlock. [[spoiler:Like Sherlock, he's a genius who stores vast amounts of information in his head via the Mind Palace technique. This is the secret of his serial blackmailing. He doesn't need to store the information corporeally or digitally.]] He's basically Sherlock's logical side, if taken to a cold, logical extreme.
** Like Sherlock, Magnussen specializes in uncovering secrets and solving mysteries, but while Sherlock uses it to put evil away and better society, Magnussen uses it as power to assert his dominance over people and countries.
** He is arguably more the evil counterpart of Mycroft. Both have extensive influence over governments, both have direct yet ethically-questionable access to leaders of Britain, both are more [[TheChessmaster chessmasters]] than [[TheTrickster trickster]], and both are strongly implied to actually be smarter than Sherlock (and both definitely like reminding him of it). It's strongly implied that Magnussen has clashed with Mycroft before and has found a way to blackmail or control him [[spoiler: which may be threats against Sherlock]] and at one point Sherlock tries [[spoiler: and fails to bribe him with Mycroft's laptop, because Magnussen craves the information on it.]] In the original stories Sherlock muses that if Mycroft had the inclination he could easily become the most successful criminal the world had ever seen- Magnussen could be read as an attempt to see if that is true.
* EvilCannotComprehendGood: [[spoiler: For all the ways that he managed to outwit Sherlock and take advantage of the fact that John is Sherlock's pressure point, he was apparently unaware of how far Sherlock would go to protect John.]]
** Also, for all the truly vile and horrible things he does every single day, he scoffs and laughs at the idea that he is actually the bad guy.
* EvilGloating: Magnussen likes to do this. And in classic villain fashion, this ultimately leads to his downfall: [[JustBetweenYouAndMe When he thinks that he has beat Sherlock Holmes, he tells him the reason why]] - [[BondVillainStupidity this way exposing his own biggest weakness]]. [[spoiler:Namely that the police can't confiscate his blackmail vault because it only exists in his head. Thus the vault will simply cease to exist and stop causing any more trouble with Magnussen's death.]]
* EvilIsPetty: Mainly because of all the information he has on people, he fully believes he can do whatever to whomever he wants. In fact this seems to be his main motivation.
** He licks Lady Smallwood's face after declaring he can ruin her husband.
** He pisses in 221B's fireplace, and when he wipes his hands, he throws the towelette on the floor.
** He picks up and eats an olive off Sherlock's pasta meal and cleans his fingers with Sherlock's drink.
** He flicks [[spoiler: John]] in the face repeatedly, because if the latter doesn't allow him, Magnussen will have Mary killed ([[PragmaticVillainy or rather, expose her as an assassin in his newspapers and thus make her a fugitive from the law and on the run from people who want her dead]]). It's implied he did something similar to [[spoiler: Janine]]. He points out he does this metaphorically to whole countries.
* FauxAffablyEvil: He rarely gets angry, and almost always speaks with the same polite tone of voice. It makes him even creepier and even more disgusting.
* FourEyesZeroSoul: A criminal mastermind with a pair of rimless glasses.
* ForTheEvulz: He's a wealthy newspaper magnate, so he blackmails people because he enjoys the power it gives him, not for the money.
* {{Hypocrite}}: He loves threatening people with ruination and does so with the utmost apathy and grace, but as soon as his neck's on the line, he breaks down into a quivering, pleading mess.
* IcyBlueEyes: Sherlock compares his eyes to the "dead eyed" gaze of a shark.
* IdiotBall: Magnussen makes two mistakes:
##He decides to blackmail Mary, a recently retired assassin. He presumably knows everything about her, and takes joy in amusing himself with the nature of her assassinations. Except this also means she has no moral or practical issue in just sneaking into his office and shooting him in the hea as soon as she could fit it in her schedule. Which she was seconds away from doing if not for Sherlock and Watson making an appearance and forcing her to improvise to avoid them being suspected in Magnusson's murder.
##The reveal that the Appledore blackmail vault is entirely in Magnusson's head, and he controls no records other than what he remembers, makes him pretty impotent. Perhaps the only reason he hasn't been killed before the episode is that his targets think that Magnusson has some sort of failsafe in case he's killed, such as physical records that would be disseminated if he dies under suspicious circumstances. Magnusson likes the idea of showing up Sherlock by getting the police to search his home and find nothing incriminating. However, he seems ignorant of the fact that this also will reveal to lots of current and future unhappy blackmail victims that it might be better to just kill him instead of pay him. The reveal is intended to demonstrate Magnusson defeating Sherlock's plan to expose him, but it also suggests Magnusson is far and wide the stupidest criminal Sherlock has ever faced, as even after Mary attempting to kill him, he seems unaware that any of his victims might attempt to kill him, and therefore makes no effort to use his extensive blackmail library to protect himself.
* {{Irony}}: Sherlock [[spoiler: shoots Magnussen in his both his literal and metaphorical computer, (where he stored all his oh so valuable blackmail information) which is directly caused by two separate instances of [[TheDogBitesBack the dog biting back.]]]]
* KickTheDog: To '''all''' of his onscreen victims.
* KickTheSonOfABitch: What two of his onscreen victims do back.
* KnightOfCerebus: For Series 3. At first, it appeared "The Empty Hearse" would be more lighthearted and funny... then John Watson is nearly burned to death. From there, he only gets worse.
* LeanAndMean: Although his slender build doesn't stand out a whole lot against the likes of Sherlock and Mycroft, Lars Mikkelsen's [[http://static3.wikia.nocookie.net/__cb20140113033247/bakerstreet/images/9/9f/Magnussen.png sharp, angular features]] help to create the effect.
* NoCelebritiesWereHarmed: Of Rupert Murdoch. Both are wealthy, powerful foreigners who run controversial news organizations.
* OldMediaAreEvil: He's an international newspaper magnate who blackmails people as a sideline.
* OutGambitted: For all of his planning and manipulation, he'd never anticipated [[spoiler: Sherlock shooting him in the head.]]
* PsychopathicManchild: He is arguably the most powerful man in the world, but he acts like a SpoiledBrat or SchoolyardBullyAllGrownUp, since he uses said power mainly to bully and humiliate people ForTheEvulz.
* {{Sadist}}: Absolutely revels in the power his information, influence and public standing gives him over other people- to the point of forcefully licking the arm and face of a government minister or pissing in Sherlock's fireplace, just because he ''can''.
* ScrewTheRulesIHaveConnections: Even though he's seen blackmailing MP's (and it's implied the Prime Minister) Mycroft wants him left alone for reasons that are unclear.
** Sherlock accuses Mycroft of ''also'' being blackmailed by Magnussen. It's implied that he actually got to Mycroft by [[spoiler: threatening to use his papers to [[BigBrotherInstinct go after Sherlock.]]]]
* SharpDressedMan: Always dresses in suits.
* ShadowArchetype: If Moriarty is the more chaotic, wild counterpart to Sherlock, Magnussen is Sherlock to his absolute coldest depths.
** He is also a more smug, sadistic, and unprincipled version of Mycroft, what the latter could be if he stopped caring about the defence of the realm and instead decided to rub its face in the mud.
* SmugSnake: He considers John and Mrs. Hudson to be "unimportant".
** He tends to underestimate the people he blackmails, some like Lady Smallwood and [[spoiler: Mary]] refuse to put up with it, and try to bring him down.
** [[spoiler: All his information is memorized, so there's no hard copy of it. But he tells this all to Sherlock, thinking he got one up on him, which is a rare but severe miscalculation on his part. Sherlock has no problem putting a bullet in his brain when he threatens John and Mary's happiness.]]
* SoftSpokenSadist: Is always soft spoken, [[DirtyCoward even when pleading for his life.]] Also, torments people he doesn't need to just because [[ForTheEvulz he enjoys it.]]
* StatOVision: His glasses show information useful for blackmail on anyone he looks at including their porn preference and "pressure points." [[spoiler:It turns out that his glasses are completely ordinary and the information he sees is just his "mind palace." It still fits this trope, though.]]
* TakeThat / ShoutOut : To another newspaper executive RupertMurdoch (leading to more accusations of BBC bias from the Daily Mail.)
* ThouShallNotKill: Villainous version, and an extremely borderline case. He has no problem arranging for John to be put ''in a bonfire'' just to see how Sherlock would react...but says he had a man on-site who would have saved him had Sherlock not made it in time, [[InsaneTrollLogic so it doesn't really count.]] [[spoiler: His final fate is to be on the receiving end of Sherlock [[DefiedTrope defying this trope.]]]] Also, at least one of his blackmail victims committed suicide after he threatened them, and he doesn't give a damn.
* UngratefulBastard: Mycroft has him under protection, yet Magnussen has no problem stealing data from British Intelligence if it gives him more power. [[spoiler: But he's GenreSavvy enough to not get caught doing it.]]
* WhiteVoidRoom: His "vault", [[spoiler: which helps him in accessing his mind palace.]]


[[folder:DI Lestrade]]
!!Detective Inspector Greg Lestrade
[[caption-width-right:350:''""Well, don't let it get to you, ''I'' always feel like screaming when you walk into a room. In fact, so do most people."'']]
->'''Played By:''' Rupert Graves

The Chief Inspector of Scotland Yard, and one of Sherlock's few friends. He is well aware that Sherlock is a stuck-up prick, but unlike the rest of the force, is also willing to admit that he genuinely is better at solving crimes than the police.
* BadassLongcoat: The few times he is badass a long black overcoat is usually involved.
* BigGood: Moriarty of all people, even compares him to KingArthur.
* BusmansHoliday: How he becomes involved in "Hounds".
* ButtMonkey: Is apparently one to the rest of the police force, over his support of [[spoiler: the "fraud" detective]] Sherlock Holmes.
* DeadpanSnarker: Not as often as Sherlock and John, but he definitely gets some good one-liners in.
* DemotedToExtra: In Series 3, the main focus is how John and Mary's marriage has changed they dynamic of the show. Lestrade's still in all the episodes but he doesn't do ''that'' much plotwise.
* DistractedByTheSexy: Molly's Christmas dress in "Scandal" causes Lestrade to need to [[http://38.media.tumblr.com/tumblr_maxeqyWjj71rrc3vio1_500.png pick his jaw back up off the floor.]]
* DonutMessWithACop: When Sally startles Lestrade in his office at the beginning of "Reichenbach", it's to find him with his feet up on his desk, classily stuffing his face with a doughnut and talking with his mouth full.
%%* FairCop
* FriendOnTheForce: To Sherlock. The ''only'' one. The rest of Scotland Yard is nearly almost comprised of jealous, arrogant, bullying douchebags who would happily do anything to incriminate Holmes if needed.
* GiveMeBackMyWallet: He is one of the many people Sherlock [[StickyFingers steals from to break in somewhere]].
* HeroOfAnotherStory: Cast by Moffat and Gatiss specifically because Rupert Graves gave off this trope when he played the role.
* InspectorLestrade: Played with. The creators comment that Sherlock Holmes is not stupid enough to accept being SurroundedByIdiots, so they present the diligent, methodical {{Determinator}} Lestrade of the later Holmes stories, not the ComicRelief Lestrade of ''A Study in Scarlet.'' In this series he's Sherlock's FriendOnTheForce - and the only member of the Yard who doesn't turn on him during the smear job of 'The Reichenbach Fall.'
* ManipulativeBastard: He'll resort to it. "What, this? This is a drugs bust."
* MustHaveNicotine: Shows off his own patch to Sherlock.
* NiceGuy: Very easy to get along with. There's a reason he's the only officer on the force whom Sherlock likes.
* NoNameGiven: Only has a first initial of "G" , until "The Hounds of Baskerville", when Sherlock mocks him for going undercover to spy on him with a lame alias of "Greg".
-->'''John''': That's his ''[[FirstNameBasis name]]''.\\
'''Sherlock''': Is it?\\
'''Lestrade''': Yes! If you ever ''bothered'' to find out!
* OnlySaneEmployee: The ''only'' cop in Scotland Yard willing to put up with Sherlock, because he gets results.
** And the ''only'' cop who doesn't immediately jump to the conclusion that Sherlock is a fraud in "The Reichenbach Fall".
* OnlySaneMan: Frequently, especially when Sherlock's around.
* ReasonableAuthorityFigure: Pretty much the only police officer willing to lend Sherlock a hand when not forced to.
* SilverFox: Gray-haired and quite handsome
* TeamDad: Most notably in ''Many Happy Returns'' where he checks in on both [[spoiler: Anderson]] and John with genuine concern. Also often talks to Sherlock like a stern father or authority figure.
** Him being the only person (that we see) to hug Sherlock upon his return reinforces this.
* UndyingLoyalty: In "The Sign of Three", leaves an important case that has both plagued and infuriated him for over a ''year'', leaving someone else to get the credit for the bust, simply because Sherlock texted him saying that he needed his help urgently because [[AFriendInNeed he was in trouble]]. Lestrade immediately calls for backup and storms over there... [[spoiler: only to find that Sherlock was having trouble writing his best man speech]].
* VitriolicBestBuds: Despite his loyalty to Sherlock, he takes great pleasure in Sherlock's misery - using every opportunity to get an embarrassing photo and refusing to keep his voice down when John and Sherlock are hung over.


[[folder:Sgt. Sally Donovan]]
!!! Detective Sergeant Sally Donovan (Vinette Robinson)
--> "You're still hanging round him? You should get yourself a hobby. Stamps, maybe. Model trains? Safer."

One of the more prominent police officers, Donovan hates Sherlock with a sort of cold apathy. As far as she's concerned, he's going to turn bad eventually, and she is well-prepared for that.
* BullyingADragon: Sherlock exposes her affair with Anderson at a crime scene just by taking a whiff of her. Doesn't stop her from calling him 'freak' or encouraging John to leave him.
* ByTheBookCop: Does ''not'' approve of Sherlock's consulting. To her, he's always "Freak".
* DeadpanSnarker: Has her moments.
* TheDogBitesBack: It doesn't pay to have enemies in the police force, Sherlock, no matter how lowly they seem.
* FairCop: Unless Sherlock is involved.
* GreenEyedMonster: She appears more than a little resentful of Sherlock's abilities, especially when the media start painting him a hero.
* {{Jerkass}}: Towards Sherlock. Sally rationalises her antagonism towards him as a being a result of Sherlock enjoying his work a little too much.
* TheLancer: To Lestrade.
* TheStoic: Unlike Anderson, she doesn't seem to have any guilt over her role in Sherlock's death.
* UnwittingPawn: To [[spoiler:Jim Moriarty]].
* YourCheatingHeart: Sleeping with Anderson, who's married.

[[folder:Philip Anderson]]
!!!Philip Anderson (Jonathan Aris)
-->"Never mind that, we found the case! According to ''some''one, the murderer has the case, and we found it in the hands of our favourite psychopath."

Another prominent police officer, Anderson is much louder about his hate of Sherlock than Donovan and others. Sherlock responds by constantly belittling him and making him look like a fool (not that he needs much help).
* TheAtoner: In "Many Happy Returns", he's come to regret the part he played in Sherlock's downfall, and is obessed with proving Sherlock's still alive to the point where he lost his job because of it.
-->'''Anderson:''' I believe in Sherlock Holmes!\\
'''Lestrade:''' Yeah, well, that's not gonna bring him back, is it?
* BadCopIncompetentCop: It's unclear if he's actually good at his job or not, since all we hear is Sherlock trashing him. In the original pilot, Lestrade seems to treat him better.
** Implied that he's not completely incompetent, considering Sherlock asks for him specifically in "Reichenbach" (despite reluctance in "A Study in Pink", which he claimed was because "Anderson won't work with me").
* BeardOfSorrow: Has one in the minisode "Many Happy Returns" and in Season 3, due to guilt over the part he played in Sherlock's downfall.
* BullyingADragon: Sherlock only has to ''sniff'' him to figure out he's having an affair with DS Donovan.
* ButtMonkey: Sherlock can't stand him, and as such, treats him horribly.
-->"Anderson, don't talk out loud, you lower the IQ of the entire street."
* CassandraTruth: In "Many Happy Returns," he has tracked Sherlock's movement and come to the conclusion that he is alive and coming back. No one believes him (at least, Lestrade doesn't.)
* GratuitousGerman: Apparently knows enough to tell Lestrade and Sherlock that "Rache" is German for revenge.
* LabRat: An in-the-field version, as he's a crime scene tech.
* LastNameBasis: It wasn't until Series 3 that we learned his first name.
* MyGodWhatHaveIDone: Implied to have one of these between Series 2 and "Many Happy Returns", over the role he played in Sherlock's downfall. Despite how much he hated him, Sherlock's death has weighed heavily on his conscience.
* NoJustNoReaction: His reaction to a YaoiFangirl in his Sherlock fanclub suggesting that [[spoiler: [[FoeYayShipping Moriarty and Sherlock]] faked their deaths in order so they could run off into the sunset together]].
* SanitySlippage: Guilt for his part in Sherlock's death apparently lead him to become obsessed with the case, lose his job and concoct increasingly bizarre theories for how Sherlock is alive and how he faked his death. He's ''right'' of course, but no-one believes him. Even when Sherlock tells him how he supposedly did it, he immediately begins questioning the explanation and appears to go a little [[GoMadFromTheRevelation mad from the revelation]]. He does however get better, and get his old job back.
* ShipperOnDeck: Sherlock/Molly, apparently. His theory on Sherlock's survival ends with Sherlock crashing through a window at Bart's and kissing Molly.
* UnwittingPawn: To [[spoiler: Moriarty.]]
* YourCheatingHeart: Gets his affair with Donovan exposed at a crime scene by Sherlock.

[[folder:DI Dimmock]]
!!! Detective Inspector Dimmock (Paul Chequer)

A one-episode character who fills Lestrade's role in "The Blind Banker."
* InspectorLestrade: Plays this role in "The Blind Banker", as temporary replacement for the real Lestrade. (Soak up the irony!)
* ReasonableAuthorityFigure: Gives Sherlock all the support he needs.
* SuspiciouslySimilarSubstitute: For Lestrade.


!!Mycroft Holmes
[[caption-width-right:350:''"All lives end. All hearts are broken. Caring is not an advantage, Sherlock."'']]
->'''Played By:''' Creator/MarkGatiss

Sherlock's older brother, who claims to be a minor government functionary. Sherlock, on the other hand, claims that he ''is'' the British government, and considering the number of pies Mycroft has his fingers in, he seems to be right.
* AloofBigBrother: To Sherlock.
* AlwaysSomeoneBetter: True to the books, he is smarter than Sherlock. In "The Empty Hearse," they reflect on how they thought Sherlock was stupid because, as children, they had no one to compare him to but Mycroft.
* AmbiguouslyGay: If you take Sherlock's "queen" joke at face value. He does have a few of the traits.
-->'''John Watson:'''(wondering what they're doing in Buckingham Palace) Here to see the Queen?\\
(Mycroft walks in)\\
'''Sherlock Holmes:''' Oh, apparently yes.\\
(Sherlock and John giggle like children)
** Though this could be more towards the statement of Mycroft being the government.
* AscendedExtra: Originally just a cameo, Mycroft is central to most of the happenings of Series 2.
* AwLookTheyReallyDoLoveEachOther: Sherlock is his 'pressure point.'
--> '''Mycroft:''' Also, your loss would break my heart.
--> '''Sherlock:''' What the ''hell'' am I supposed to say to that?!
* BadassBookworm: Even smarter than Sherlock, as he himself acknowledges.
* BadassBureaucrat: Apparently he ''is'' the British government.
* BigBrotherBully: Probably unintentional, but still present. Sherlock thought he was 'the stupid one' and Mycroft apparently did too, Mycroft in Sherlock's mind palace sits above him and judges him in the courtroom, and his stories to Sherlock as a child were about unworthy children being plucked from the earth, of which Sherlock was one. In Sherlock's own words, "He was a rubbish big brother."
* BigBrotherInstinct: In a rare tie in with BigBrotherIsWatching. Apparently, when you're a shadowy government official, keeping tabs on your little brother involves kidnapping and bribery.
* BigBrotherIsWatching: Quite literally, in fact. Mycroft's command of seemingly every surveillance camera in London under the vague name of the "government".
* BigBrotherMentor: Sherlock pictures him in his Mind Palace when he needs help.
* BreakTheHaughty: Gets this twice throughout the series, due to his arrogance: [[spoiler: Driving Sherlock towards Irene results in an anti-terrorist plot being compromised in "A Scandal in Belgravia". In "His Last Vow" he refuses to deal with Magnussen. Also he rather carelessly leaves his laptop out in the open at his parents home, which Sherlock takes in an attempt to bargain with Magnussen. When the deal goes sour, Sherlock ends up killing Magnussen.]]
* BrilliantButLazy: Typical for the character, he can even outdo Sherlock when it comes to deductions, but he dislikes legwork.
%%* TheChessmaster
%%* DeadpanSnarker / GentlemanSnarker: Very much.
* DefrostingIceQueen: We get to see a more human side of Mycroft in Series 3, one who does such prosaic things as [[spoiler:play board games, lament "the horror" of having to take his parents to see a musical, and chide his mother for calling him "Mikey" and leaving potatoes on his state-secret-habouring laptop. He also admits to Sherlock that losing him would break his heart, and we're shown him seeing an imperiled Sherlock as a frightened little boy]].
* EmbarrassingNickname: Mrs. Holmes calls hims "Myc" much to his displeasure.
* EvilMentor: Not truly ''evil'' per se, but "The Sign of Three" suggests that a lot of Sherlock's mannerisms and habits are due to Mycroft's influence, subconsciously grilling him to be less emotional and more detached, whilst pushing him to find the answers.
* {{Expy}}: Gatiss' portrayal is pretty much based on the Creator/ChristopherLee Mycroft from ThePrivateLifeOfSherlockHolmes WaistcoatOfStyle and all.
* FateWorseThanDeath: Played for laughs in "The Empty Hearse". He begs Sherlock to take over sitting through [[spoiler:the Literature/LesMiserables musical]] with their parents.
-->'''Mycroft:''' But you don't understand the pain of it... the horror!
* FormerlyFat: Gatiss claims Mycroft was on a lot of yo-yo diets. This is a reference to the books, in which Mycroft was actually corpulent in the present tense.
** In "The Sign of Three", Sherlock phones him to find him out of breath, commenting that either he's caught him in a compromising position or he's been working out trying to lose weight.
* GenreSavvy: When John asks why Mycroft doesn't trust his own subordinates, Mycroft points out that they all spy on people for money. Which is ironic since he wanted Watson to spy on Sherlock for money.
* GoodIsNotNice: Devoted to queen, country, and little brother, but definitely not one of the angels.
* GuileHero: It comes with the territory of being a KnowledgeBroker and TheSpymaster.
* HeroicBSOD: Has had two so far. The first is when [[spoiler: Moriarty texts him to inform him his counter-terrorist enterprise has been compromised.]] The second is after [[spoiler: Sherlock shoots Magnussen.]]
* IAmTheNoun: Like his Doyle counterpart. Actually, he one-ups him in a few departments:
-->"He ''is'' the British government -- when he's not too busy being the British secret service or the CIA on a freelance basis."
* IceQueen: A true male example - Moriarty's code name for him is "The Iceman". Mycroft's feelings only extend to Sherlock's well-being; everyone else is expendable.
** Mycroft seems to only let himself feel any sort of attachment, however remote, to Sherlock and his immediately family. He even worries that Sherlock developing feelings for his small group of friends will leave him vulnerable. Mycroft even goes so far as to [[spoiler:remind Sherlock of his childhood pet having to be put down]] to warn him about the dangers of emotions, a lesson he himself has learned and mastered.
** Not to mention that Sherlock's "queen" joke [see AmbiguouslyGay above] combines with this to form a rather interesting pun.
* InstantExpert: He claims he learned Serbian in two hours. Sherlock mentions he's slipping, to which Mycroft replies it's because he's reached middle age.
* InsufferableGenius: In some ways even worse than his brother, as "The Empty Hearse" shows.
* IntelligenceEqualsIsolation: Unlike Sherlock who has John, Molly, Greg, and Mrs. Hudson as his friends, Mycroft has nobody except his brother, and that's rocky most of the time.
** Reinforced in "The Empty Hearse" by none other than Sherlock, who wonders what Mycroft did for two years without him and eventually forces Mycroft to say, "[[BlatantLies I'm not lonely, Sherlock.]]"
** In the same conversation, he comments that since he ''is'' smarter than Sherlock, he's a little envious since - while his brother lives in a world [[SurroundedByIdiots surrounded by idiots]] - Mycroft lives in a world surrounded by ''goldfish''.
* JustTheFirstCitizen: According to the world he "Occupies a minor position in the British Goverment" but is actually (according to Magnussen) the most powerful man in Great Britain.
* KickTheDog: Sherlock doesn't like it when people insult Mrs. Hudson, remember? Mycroft telling her to "shut up" wasn't the wisest idea. Also mentioning Redbeard to Sherlock.
** There was also his reaction when Anderson and his colleague overheard John mention Magnusson's name.
* TheKindnapper: To John, usually when he's concerned about Sherlock.
%%* KnightTemplarBigBrother
%% * KnowledgeBroker
* LonelyAtTheTop: He is seen sitting alone doing nothing on Christmas Eve in "A Scandal in Belgravia". Of course to him it may be a special luxury to do so. In fact he seems to prefer being alone.
* LoveIsAWeakness: Firmly believes that "caring is not an advantage".
** Ultimatley played straight becuase Moriarty, Irene, and Magnussen all know that the best way to get to Mycroft is through his brother.
** He also loves his parents.
* ManChild: Not as much as Sherlock. But it's still there, being around his parents brings it out in him.
* MyGodWhatHaveIDone: [[spoiler:Subverted: it turns out he and Sherlock planned the fall and he deliberately leaked info about Sherlock to Moriarty.]]
* OOCIsSeriousBusiness: Magnussen has sensitive personal information on ''every'' important person in the Western World (and proably beyond that). He's seen blackmailing an MP and it's implied he's even blackmailing the '''Prime Minister'''. You'd think he'd want Magnussen out of the picture since he's a threat to British Security. But he does '''not''' want Sherlock to go after him in anyway at all, telling Sherlock "you go against Magnussen and you go against me."
** He even tells Anderson and his friend to forget that Sherlock even mentioned Magnussen or else he'll throw them both in jail. He even tries to threaten ''John'' (it doesn't work).
* ParentalSubstitute: Besides his "constant" worrying about Sherlock, it's made fairly clear in "Scandal" that Sherlock regards him as this:
-->'''Mycroft''': (pouring tea) I'll be "mother".
-->'''Sherlock''': And there's a whole childhood in a nutshell.
** In "His Last Vow", [[spoiler: after Sherlock kills Magnussen, Mycroft sees his brother as a scared little boy.]]
* PetTheDog: Regardless of how they interact, he does genuinely care for Sherlock, his parents, and respects Watson.
* SharpDressedMan: Always seen wearing fancy suits.
* SherlockScan: Even better at it than his brother. He figures out a case Sherlock was working on by briefly glancing at the cliff-notes! He also became fluent in Serbian in less than two hours, simply by listening to the locals.
* TheSociopath: Has even fewer emotions and less genuine feeling than Sherlock, but hasn't hit Moriarty levels, so far.
* TheSpymaster: According to Sherlock, he "is the British Government," in addition to a number of foreign agencies that Mycroft supposedly controls.
* SurroundedByIdiots: Surrounded by ''goldfish'', according to him.
* UngratefulBastard: In "His Last Vow". [[spoiler: Sherlock has killed Magnussen. Instead of pardoning Sherlock, or hushing the whole thing up, he sends him on suicide mission for MI6. The MP who hired Sherlock to bring down Magnussen, Lady Smallwood is the one who signs the order. They only change their minds when Moriarty comes back, and realize how much they need Sherlock.]]
* UnwittingPawn: [[spoiler: He gave Sherlock's life story to Moriarty (who he knows is dangerously obsessed with his brother) in exchange for something that, it turns out, never existed in the first place. Whoops.]]
** Subverted. [[spoiler: If Sherlock is to be believed, it was Moriarty and not Mycroft or Sherlock who was the UnwittingPawn all along.]]
%%* WaistcoatOfStyle
* WellIntentionedExtremist: Will do just about anything in the interests of British national security (as well as keeping his little brother safe), up to and including assassinations.
** Averted with Magnussen. Despite how dangerous a threat he is to the British Government, he's content to let him continue his activities even as he's blackmailing MP's, one of who is his own superior.

[[folder: "Anthea"]]
->'''Played By:''' Lisa [=McAllister=]

Mycroft's personal assistant, almost always seen texting on her phone.
* CommutingOnABus: Shows up in "A Study in Pink", then doesn't come back until "The Empty Hearse".
* DropInCharacter: Has only a couple lines in the first episode of Season 1 and has an even shorter appearance in the first episode of Season 3 when she hands Sherlock his trademark coat.
* GirlFriday: To Mycroft.
* NoNameGiven: Her name is never given; she introduces herself to John in "A Study in Pink" as "Anthea", but cheerfully admits that it isn't her real name.
** AllThereInTheManual: The script for "A Study in Pink" that comes with the LimitedSpecialCollectorsUltimateEdition of series 1-3 reveals her first name to be "Andrea".
* PhoneaholicTeenager: Though not a teenager, she is almost always seen texting.
* SexySecretary: Mycroft's.
* ShoutOut: A bit of an obscure one: this isn't the first show based on ''SherlockHolmes'' to feature a [[spoiler: government employee]] whose fake name is Anthea. ''JonathanCreek'' originated it.

[[folder:Lady Smallwood]]
!!Lady Smallwood
->'''Played By:''' Lindsay Duncan

A member of the British Parliament who is being blackmailed by Magnussen (just like everyone else). Unlike everyone else, she figures out a way to fight back--by calling Sherlock Holmes.
* BlueBlood: She's an MP who presumably sits in the House of Lords.
* TheChainsOfCommanding: [[spoiler: She's not particurarly thrilled to sign the order for Sherlock's exile, but does so anyway in the interests of "justice."]]
* GenreSavvy: When Magnussen threatens her with blackmail of her husband to stop a government investigation against him, her solution is to go to Sherlock.
** WrongGenreSavvy: [[spoiler: Sherlock fails, and a freezeframe bonus reveals Lord Smallwood committed SUICIDE]].
* IronLady: Absolutely '''refuses''' to let Magnussen walk over her or her husband.
--> "You do '''not''' own me!"
* MI6: It's implied one of her duties as an MP is to look oversee British Intelligence, meaning she is technically Mycroft's superior.
* TheStoic: Keeps her cool, during her episode with Magnussen.
* UngratefulBitch: [[spoiler: Signs an order for Sherlock to be sent on suicide mission for MI6, after he kills Magnussen, on Mycroft's behest. Although she notes it is "hardly merciful".]]
* UnwittingInstigatorOfDoom: Asking Sherlock to bring down Magnussen sets off a chain of events that [[spoiler: lead to Magnussen being murdered by Sherlock, and nearly exiled stopped only by Moriarty's "resurrection".]]


!!Mike Stamford
->'''Played By:''' David Nellist

An old friend of John's, who is also one of the only people who can stand Sherlock for any length of time. He's the one who sets them up as flatmates.
* ApatheticTeacher: He teaches medicine at Barts, but claims to hate his students.
* BigFun: Portly with a jolly disposition
* OpenMouthInsertFoot:
--> '''Mike:''' I heard you were abroad somewhere, getting shot at, what happened?
--> '''John:''' I got shot.
* NiceGuy: He's doens't seem particularly annoyed by Sherlock unlike most people. He also offers suggestions to John on how to find better living quaters in London.
* PutOnABus: Hasn't been seen since ''A Study in Pink'', although he's a frequent commentator on the blogs, a SherlockScan in ''A Scandal in Belgravia'' reveals John spent a night out with him, and he sends a telegram to John's wedding apologizing he couldn't make it.

!!Molly Hooper
[[caption-width-right:350:''"I know what that means, looking sad when you think no-one can see you."'']]
->'''Played By:''' Louise Brealey

A mortician in love with Sherlock, she is an important ally of his, often helping him do odd studies on corpses and letting him use the lab for experiments he can't fit into his flat.
* {{Adorkable}}: She just can't help being this.
* AllLoveIsUnrequited: Is hopelessly in love with Sherlock. In The Empty Hearse she claims to be over him and has a fiancé, but her fiancé turns out to [[LovingAShadow look a lot like Sherlock]] even to the point of dressing like him. In The Sign of Three she spends most of the wedding looking at Sherlock instead of her boyfriend or John and Mary. The engagement has ended by His Last Vow a month later.
* AngerBornOfWorry: Actually ''slaps'' Sherlock three times for failing a drug test, then chews him out how he could be so careless and to apologize to his friends.
* ArmorPiercingSlap: Gives Sherlock a doozy when she finds out he's [[spoiler:fallen off the wagon.]] John asks her if Sherlock's [[spoiler:clean,]] Molly merely walks in front of Sherlock, braces herself, and '''wham... wham... wham!'''
* AscendedExtra: Originally a minor character in Series One, she became a major character in the following series.
* BeneathSuspicion: [[spoiler:It turns out that Sherlock asked her to help him fake his death, knowing that Moriarty wouldn't be keeping an eye or bothering to target her, since he'd dismiss her as being not important enough for Sherlock [[EvilCannotComprehendGood to care about]].]]
* BerserkButton: In "The Sign of Three", after her fiance Tom jokes that Sherlock is drunk during his awkward speech, [[DisproportionateRetribution she stabs him in the hand]] with a (plastic) fork.
** She slaps Sherlock across the face when he betrays his friends' trust by [[spoiler: falling off the wagon.]]
* BewareTheNiceOnes: Between stabbing her [[spoiler:ex-]]fiance with a fork and slapping Sherlock three times [[spoiler:for failing a drug test]], Molly Hooper is not to be messed with.
%%* BrainyBrunette
* ButtMonkey: Verging on [[TheChewToy Chew Toy]] at times, with the way Sherlock treats her.
* CanonForeigner: According to WordOfGod, she was just written in as a one-off character in "A Study in Pink", but [[AscendedExtra they liked the actress and the character so much, she became a central figure in the rest of the series]] -- even though she's one of few in the show who don't have a counterpart in the original canon.
* CloserToEarth: The only one to see Sherlock's [[spoiler: suicidal behavior]] in "The Reichenbach Fall", and ultimately [[spoiler: the one he trusts to help fake his death]].
* CrazyCatLady: She worries about becoming one on her blog.
-->OMG! I nearly just wrote 'At least Toby will never leave me'. I am becoming a Mad Spinster!
* TheCutie: Easily the nicest character on the show. And just look at her - she's so ''cute''!
* [[DoggedNiceGuy Dogged Nice Girl]]: To Sherlock. No matter how horribly he treats her, she just can't give up on him.
* GrewASpine: She's noticeably more assured and less awkward in Series Three, refusing to put up with Sherlock's more mean-spirited antics.
* HasAType: In ''The Empty Hearse'', Sherlock assures Molly that all the men she falls for can't be psychopaths. After he leaves, she muses to herself that maybe it's just her type.
* IgnoredEnamoredUnderling: To Sherlock, who only returns her affections when he wants something, at least in the first season. Although he doesn't return her romantic feelings, he does see her as a friend, eventually.
* IncompatibleOrientation: With [[spoiler:"Jim". It's the psychopathy]].
** Also has it with Sherlock. She wants his body; he wants her dead bodies.
* InterGenerationalFriendship: Has one with Mrs. Hudson.
** Seems quite friendly with Lestrade as well in "Scandal".
* LabRat: The coroner at St. Bart's.
* LovingAShadow: Molly's fiance. Looks quite like Sherlock and wears the same Belstaff coat.
* MoralityPet: To Sherlock:
-->"And if you watch the scenes with Sherlock and Molly, apart from the very beginning, she always wins. She always wins. She makes him apologize. She humanizes him. She tells him off." - Steven Moffat
* NiceGirl: The things she's been through would cause anyone to become bitter, but she remains sweet and good-natured despite.
* OpenMouthInsertFoot: An unfortunate habit of hers.
-->'''Molly:''' How's the hip?
-->'''Mrs. Hudson:''' It's atrocious, but thanks for asking.
-->'''Molly:''' I've seen much worse ... but then I do post-mortems.
* PluckyGirl: Despite everything that happens to her.
* RapunzelHair: Not to ridiculous lengths, but it's past her chest.
* ReplacementGoldfish / SelectiveObliviousness: Despite her belief that she's moved on from her unrequited crush on Sherlock, she's completely oblivious to the fact that her new fiance Tom looks and dresses ''exactly'' like him. No one has the heart to tell her.
** Averted in "The Empty Hearse", when Sherlock brings her along on the case. Molly thinks she is there to replace John but Sherlock is trying to thank her.
* SarcasmMode: Actually capable when pushed: her response to John [[spoiler: asking if Sherlock is "clean" of drug use]] is to vocalize a very bitter-yet-subtle ''[[BrokenPedestal "Clean?"]]''.
* SecretKeeper: Moriarty's failure to recognize her as among the people Sherlock cares about lead to her being [[spoiler:one of the only people to know he isn't dead.]]
* SheCleansUpNicely: In a [[http://4.bp.blogspot.com/-JGCFjQneeu8/TxMjG5aF3sI/AAAAAAAAACI/OAm9nl4cyUs/s1600/molly1.jpg jaw-dropping black and white dress]] in "A Scandal in Belgravia". Even Lestrade is DistractedByTheSexy. Really, anytime she takes the effort to dress up, including her [[http://bakerstreetbabes.com/wp-content/uploads/2014/06/molly4.jpg bright yellow do]] during John and Mary's wedding in ''[[Recap/SherlockS03E02TheSignOfThree The Sign of Three]]''
* ShrinkingViolet: At first. She starts to [[GrewASpine grow a spine]] in Series 2, and by Series 3, she's much more confident.
* SpannerInTheWorks: As Sherlock explains in The Empty Hearse, [[spoiler: the reason her help was so essential in his plan to counter Moriarity was because she was someone Moriarty believed was below Sherlock's notice, even as he used her to get closer to him, and thus Moriarty believed she didn't matter in the grand scheme of their game - a hole in his scheming that Sherlock is ultimately able to exploit. This even shows in Moriarty's plan to hurt Sherlock's loved ones: he sends assassins after Mrs. Hudson, Watson and Lestrade, but ignores Molly completely.]]
* ThrowTheDogABone: Her relationship with Tom in Series 3, who aside from being the [[ReplacementGoldfish spitting image]] of Sherlock is her first love interest who's ''not'' a sociopath. And as she cheerfully comments, she's now getting regular sex.
** [[spoiler: Sadly it's ended by "His Last Vow", a month later. It might have been because she stabbed him in the hand with a plastic fork]].
* UnwittingPawn: [[spoiler:Moriarty]] uses her to get close to Sherlock.

[[folder:Mrs. Hudson]]
!!!Martha Louise Hudson née Sissons
[[caption-width-right:350:''"I'm your landlady, not your housekeeper."'']]
->'''Played By:''' Una Stubbs

The landlady of 221B, she basically treats John and Sherlock as her sons--a relationship they largely reciprocate.
* AsYouKnow: Her screen-name is "Marie Turner" which is her friend's name (Mrs. Turner, next door, with "the married ones"). Becomes a RunningGag on Sherlock's site and John's blog where every time she comments, she immediately double-posts a reminder: "It's Mrs. Hudson, by the way."
** With the exception of the one time Mrs Turner herself actually commented.
** As of Christmas 2011, she now signs under 'Mrs. Hudson'. John and Sherlock [[PetTheDog got her a computer for Christmas]].
* BerserkButton: Harming her is officially Sherlock's, considering he throws her attacker out a window ''multiple'' times.
** Being [[HypocriticalHeartwarming rude to her]] is another, even stunning Mycroft with how angry he got when Mycroft told her to shut up in irritation.
** Don't lead her on, or let her find out about your marriage from Sherlock.
* BrainlessBeauty: Anyone who unknowingly marries a major drug kingpin can't be much in the way of a detective.
* CatchPhrase: "I'm your landlady, dear, not your housekeeper!"
* CloudCuckoolander: She's cheerfully oblivious to most of Sherlock's strange living habits. Or she simply doesn't care. Or, given hints in Series 3, she's quite often stoned. That said, she does have a bone to pick with a few of his habits. Upon finding that Sherlock keeps thumbs in the fridge, she reacts with disgust, and she also seems extremely panicked by him shooting holes in the wall- though her reaction to this is just to scold him like a child and add repair costs to his rent.
-->'''Mrs. Hudson''': I'm putting this on your rent, young man!
** Season Two implies she's faking it a bit. She manages to smuggle Irene's camera phone out from under the villains' noses... in her bra... while they thought she was "having a cry".
* CoolOldLady: Mrs. Hudson is one of a select few who can tolerate Sherlock for extended periods of time, gave Sherlock a special deal on the apartment (as thanks for helping her out with getting her husband executed), and keeps some kind of "herbal soother" in her apartment that she doesn't want the cops to know about.
** She also pretends to be much more of a fragile old woman than she actually is when [[spoiler: captured by the Americans in order to hide the fact that she has the phone they're looking for]]. When Sherlock [[spoiler:throws the guy out the window]], her first reaction is simply that her bins are getting dented. For those of you interested, she [[spoiler: hid the phone in her bra.]]
* DarkAndTroubledPast: Series 3 later reveals that she's a former exotic dancer, and that whilst she lived in Florida, unbeknownst to her, her husband had gotten involved in and eventually ended up ''running'' a local drug cartel, before being eventually caught and executed for double homicide. She actually found this something of a relief and even formed [[OddFriendship a friendship]] with the man responsible for securing his conviction, Sherlock. Although she was perhaps more involved than she'd like us to know:
-->'''Sherlock''': Even your landlady used to run a drugs cartel
-->'''Mrs Hudson''': It was my husband's cartel, I was just typing.
* GenreSavvy: She's smart enough to realise that a camera phone that Sherlock has left behind is important... and promptly hides it. In her bra. To her credit, it ''works''.
* GossipyHens: In the un-aired {{Pilot}}, Sherlock says, [[SincerityMode with genuine appreciation]], that little old ladies are better than security cameras.
* GRatedDrug: Her "herbal soothers" she doesn't want the drugs bust to find.
** FridgeBrilliance comes into play after the revelation in Series 3 that her husband was involved in running an American drug cartel, since being found in possession of illegal drugs could cast doubt on her being unaware of his activities, causing her to risk accusations of perjury and even extradition by the American authorities.
** Avert in "His Last Vow", when Magnussen's scan of her reveals outright she uses marijuana.
* InformedDeformity: Her notorious hip has come up multiple times, and yet, she's never seen limping or otherwise uncomfortable because of it, and she seems to have no trouble going up and down the stairs in 221B.
* MoralityPet: To Sherlock and John.
* NeverMessWithGranny: Played CIA agents, police officers, and even Watson himself in "Scandal" by faking tears and sneaking Irene's phone out in her bra.
* OddFriendship: With Sherlock, the man responsible for getting her husband executed in America.
* ParentalSubstitute: She dotes on Sherlock and John like they were her own grandchildren, she even brings Sherlock his morning tea.
** She's one of the few people Sherlock is openingly affectionate to her, and does ''not'' take it well if she's threatened.
* ScreamingWoman: Twice in Series 3. The first one is played for laughs when Sherlock reveals himself after pretending to be dead. The second time is ''not'' played for laughs is when [[spoiler: Moriaty comes back from the dead, and Mrs. Hudson is understandly freaked out by the prospect.]]
* ShipperOnDeck: Mrs. Hudson might be pushing eighty, but she's a great, gushing fangirl at heart. She initially assumes that John and Sherlock are a couple, and wouldn't be persuaded otherwise. However, after Season One (especially during the events of "A Scandal in Belgravia") it appears that she doesn't think of them in that way anymore. Or perhaps she's just keeping that to herself now.
** In "The Empty Hearse", she's shocked that John is getting married to a ''woman'', especially so soon after Sherlock. John responds once again insisting that he's ''not'' gay and that Sherlock was ''not'' his boyfriend.
* ShrineToTheFallen: Left Sherlock and John's flat exactly as it was during the two years Sherlock was "dead", admitting she didn't have the heart to move anything or even dust, since Sherlock always refused to let her clean the flat.
* TeamMom: To Watson and ''especially'' Sherlock.

!!Sarah Sawyer
->'''Played By:''' Zoe Telford

One of John's girlfriends.
* ActionGirl: Took on Chinese gangsters with a ''wooden stick''.
* AlliterativeName: Presumably as a ShoutOut to Mary Morstan.
%% * BadassBookworm
* BoundAndGagged: In "The Blind Banker".
* DistressedDamsel: When she was kidnapped by the Chinese gangsters. She handles herself relatively well, though.
%%* HospitalHottie / HotScientist
* WeHardlyKnewYe: Disappears from the narrative when she and John break up some time after "The Great Game".

!!Harriet "Harry" Watson
->'''Played By:''' N/A

John's sister, who he has an abrasive relationship with due to her alcoholism.
* TheAlcoholic: Harry's a known alcoholic, but has tried to quit various times according to John's website, with limited success.
* AloofBigBrother: Inverted. She's very supportive of John, but he's distant because he doesn't like her drinking.
* BigSisterInstinct: Is very protective of John on the forums of his website.
* DivorceAssetsConflict: Solved this by giving her phone, a present from her wife, to John.
* TheGhost: While mentioned in the show, Harry has yet to show up. She is, however, a frequent poster on John's blog.
* PrecisionFStrike: Whenever someone [[BerserkButton insults]] [[BigSisterInstinct John]], judging by all the deleted comments on his blog.
* SamusIsAGirl: Invoked by Sherlock, while deducting who John's phone belongs to, he assumes that Harry is a boy; turns out that it's ''Harriet'', but she does happen to be a lesbian.
* TomboyishName: During his investigation of Watson's phone, Sherlock notices the name "Harry" on it. Turns out it's Watson's ''sister'', Harriet.

!!Kitty Reilly
->'''Played By:''' Katherine Parkinson

A reporter who is both smarter and stupider than she appears. She affects a "loony fan" persona to get close to Sherlock (which he sees right through), but it turns out she's actually being played by someone far more dangerous than him.
%%* GoingForTheBigScoop
* IntrepidReporter: Tries to be this but Sherlock calls her out for being a HotScoop and a StalkerWithACrush trying too hard to impress people.
* MeaningfulEcho / IronicEcho: "You repel me".
* ShadowArchetype: To Molly. Molly is a DoggedNiceGirl, Kitty is a StalkerWithACrush. And both of them prove to be rather important [[spoiler:in "The Reichenbach Fall", as Moriarty sold his "story" to Kitty after Sherlock tore her down, helping to spread the belief that Sherlock is a fraud. Molly, meanwhile, despite being treated badly by Sherlock, still seems to step up to help him behind the scenes of "Reichenbach". Also, they both display admirable loyalty to Sherlock and Moriarty, respectively.]]
* SmugSnake: She reeks of desperation and uses every tactic in the book to wring a story out of Sherlock. It doesn't work, as he finds her repellent.
* UnwittingPawn: To Moriarty.
* WrongGenreSavvy: Clearly thinks she's an IntrepidReporter who has uncovered the truth that Sherlock is [[DetectivePatsy a fraud]] and responsible for the crimes he's solved, while Moriarty is merely an actor suffering a crisis of conscience. Alas, no.

!!Mary Morstan/Watson / [[spoiler: A.G.R.A.]]
->'''Played By:''' Amanda Abbington

John's girlfriend in season 3.
* AdaptationalBadass[=/=]AdaptationalVillainy: This version of Mary is [[spoiler:a former assassin and intelligence operative.]]
* AdmiringTheAbomination: While most of John's past girlfriends are mentioned to have absolutely ''hated'' Sherlock due to his various personality quirks and mildly sociopathic tendencies, her reaction to meeting him is to grin and admit;
--> '''Mary''': I ''like'' him!
* AlliterativeName: A canon carryover. Bonus points for her actress having one, too.
* AmicableExes: With David though the latter retains feelings for her. [[spoiler:Sherlock makes it very clear he thinks those feelings are a ''little too strong''.]]
* CastingGag: Watson's fiancee is played by Martin Freeman's real life partner. It makes their chemistry much more natural and believable.
* CompositeCharacter: The traits of the original canon's Mary Morstan have been combined with those of [[spoiler: ''' ''Sebastian Moran''.''']]
* DarkSecret: Mary's claim to be an orphan is [[spoiler:a lie: she used to be a professional killer, and the reason she has so few friends is that 'Mary Morstan' is an identity she adopted only a few years ago.]]
* DeadPersonImpersonation: The real Mary Morstan [[spoiler:was still born.]]
* EasilyForgiven: John decides to not read her past and keep her as his wife. Granted, it does take months for him to come to terms with her deception.
* FakeBrit: InUniverse. Sherlock suspects that she is not really English.
* {{Fangirl}}: Certainly reads John and Sherlock's blog like one. And she pushes them to investigate the Bloody Guardsman case together even though they're both trying to be "responsible" so as not to upset the fragile three-way balance.
* FluffyFashionFeathers: Wore a black feather jacket on the date where John proposed to her.
* GuileHero: Taking into account her background and skill sets, she can qualify as one.
* HairOfGoldHeartOfGold: Unusually, among John's girlfriends.
* HelloNurse: Works at John's clinic. Also doubles as a {{Hospital Hottie}}.
* ImprobableAimingSkills: Able to [[spoiler:throw a coin and shoot it in mid-air.]]
* KindheartedCatLover: One of Sherlock's deductions is that she is a cat lover, and she certainly fits the kindhearted part of the trope.
* ManicPixieDreamGirl: Aversion. While she helped pull John out of his depression after Sherlock's disappearance, there's more to her than that. She's the only one of John's partners who has understood the importance of his relationship with Sherlock ''without'' becoming jealous because of it.
* NiceGirl: She's a genuinely compassionate person but also no pushover. When informed by Sherlock that one of John's cousins secretly hates her, Mary smiles serenely and moves the cousin's seat at the reception from the main table to next to the bathroom.
* OneTrueThreesome: Invoked. Mary seems fine with John's non-sexual bromance with Sherlock in addition to his romantic and sexual relationship with her. Sherlock actually seems to enjoy her company, actively accommodating her wishes instead of simply tolerating her presence. The three of them get along astounding well in "The Empty Hearse" and "The Sign of Three", with the closest he comes to displaying any sort of irritation towards her being when she tagged along to prevent Major Sholto's death, which in fairness occurred at her wedding. Their fragile equilibrium only seems to become unbalanced when [[spoiler: Sherlock realises that she's pregnant]].
** In "His Last Vow", their dynamic [[spoiler: shatters when it's revealed she used to be a professional assassin for the CIA. After some initial shock (and a bullet wound) Sherlock doesn't seem particularly bothered by her former occupation, being more upset she lied to John than anything else. John on the other hand is understandably ''furious'']].
* [[OnlySaneMan Only Sane Woman]]: The wedding planning scene, where she can see that both John and Sherlock are itching to go on a case together to reaffirm that they'll stay friends after the wedding, but she has to manipulate them both shamelessly to make it happen.
* PregnantBadass: Nearly [[spoiler: assassinates Magnussen while pregnant.]]
* ProfessionalKiller: Former [[spoiler:intelligence agent and did wet work for the CIA. Bet you didn't see that coming.]]
* WalkingSpoiler: For "His Last Vow".

->'''Played By:''' Yasmine Akram

Mary's bridesmaid at her wedding, she quickly forms an OddFriendship with Sherlock and uses his super-analytical skills to weed out one-night stands she'll regret.
* ForeignPeopleAreSexy: She's Irish and gorgeous, to the point Sherlock specifically notes her beauty in his wedding toast.
* NiceGirl: From what we see of her she's very pleasant and outgoing.
* ThePawn: A particularly unlucky example. [[spoiler: Not only did Sherlock pretend to fall for her to use her to get access to Magnussen, it turns out Mary independently cultivated a close friendship with her for the same reason. Mercifully Janine never found out about that aspect.]]
* PunchClockVillain: Only 'villainous' at all in the fact that she works for Magnussen as his PA; there is no indication that she is involved in anything unethical herself or knows the extent of Magnussen's criminality. [[spoiler: Magnussen himself mentions he enjoys jabbing her the eye, the implication being that she only worked with him because he had found one of her pressure points.]]
* SexySecretary: To Magnussen, though technically she is a PA. [[spoiler: She hates him and only sticks around because of blackmail. It's implied he took sadistic pleasure in abusing her.]]
* VitriolicBestBuds: With Sherlock, [[spoiler: in "His Last Vow" after she finds out she used him to get to Magnussen.]]
* WhatTheHellHero: To Sherlock, [[spoiler: in "His Last Vow" after finding out how he used her. She tells him, clearly more hurt than angry, that he needn't have manipulated her and if he'd just trusted her they could have been friends.]]
* WomanScorned: Downplayed. [[spoiler: While she ''does'' sell increasingly outrageous stories to the papers out of anger at Sherlock (and messes around with his morphine drip), she clearly doesn't hold a ''major'' grudge and even kisses him on the forehead before leaving. Sherlock conversely acknowledges he deserves it and congratulates her on at least making some cash for her troubles.]]

[[folder:Mr. & Mrs. Holmes]]
!!Mr. & Mrs. Holmes
->'''Played By:''' Timothy Carlton & Wanda Ventham

A perfectly ordinary married couple that somehow managed to produce both Mycroft and Sherlock.
* AmazinglyEmbarrassingParents: Subverted. Sherlock and Mycroft are both highly embarrassed by them... because they're so ''ordinary.'' It's their lack of genius - or madness, either would be acceptable - that makes them 'highly embarrassing' to their child prodigies.
* BowTiesAreCool: Mr. Holmes wears one at Christmas.
* CastingGag: They are played by Benedict Cumberbatch's real parents.
* FamilyVersusCareer: Mrs. Holmes was a career mathematician, even having a published textbook. But she gave it all up for her children.
* HappilyMarried: To the extent that Sherlock brings the Watsons down to their house when [[spoiler: they have a bit of marriage trouble.]]
* GoodParents: They certainly seem to be. They love their sons despite their....quirks, and take no notice when Sherlock steps onto the couch between them while they are telling him a story and pushes them out the door when John arrives.
* InTheBlood: Mrs. Holmes was a mathematician, so it's obvious Mycroft and Sherlock got their intelligence from her.
* IronLady: Mrs. Holmes definitely gives off this vibe, even ''Mycroft'' is afraid of upsetting her.
* JerkWithAHeartOfGold: Like her sons, Mrs. Holmes seems a bit cool on the exterior, but is a caring mother, going as far as to do Christmas dinner for the whole family, plus the Watsons (and even Billy Wiggins, although she freely admits to him that she's not quite sure why he's there), as [[spoiler:Sherlock is suffering from a bullet wound]] and she wants to make sure he's okay.
* LastNameBasis: Mrs. Holmes math textbook gave her the initials "M.L.," but that's about it, we don't really get a first name for either of them.
* MamaBear: "Somebody's put a bullet in my boy and if I ever find out who, I shall turn absolutely monstrous."
* NiceGuy: Mr. Holmes is very pleasant and outgoing. He's even concerned about the Watsons marriage.
* OddCouple: Mrs. Holmes was a mathematician, Mr. Holmes is by his own admission "something of a moron", at least by comparison.
* OppositesAttract: From what we see of them. Mrs. Holmes is a bit temperamental, stubborn, and headstrong, whereas Mr. Holmes is much more laid-back, calm and passive. Many have noted they seem very similar to a time-shifted, partially-gender-flipped Sherlock and John.
* OnlySaneMan: Mr. Holmes is the normal one in the family.

[[folder:Bill Wiggins]]
!!Bill Wiggins
->'''Played By:''' Tom Brooke

A seemingly harmless drug-addict.
* BakerStreetRegular: He's a drug addict Sherlock befriends while undercover in a crackhouse. Sherlock then uses him to communicate with Mary.
* CompositeCharacter: His first name, Billy comes from the page boy of 221B who first appeared in William Gillette's play, and than migrated into the stories as a relatively minor character. His last name Wiggins, comes from the leader of the Baker Street Irregulars in Conan Doyle's first two novels, "A Study in Scarlet" and "The Sign of Four".
* CrouchingMoronHiddenBadass / HiddenDepths: Inverted; he's more Crouching Wimp, Hidden Genius - which is why Sherlock takes a shine to him. He's also apparently an excellent chemist, [[spoiler: capable of creating non-lethal drugs to knock out people without damaging their bodies]].
* EruditeStoner: He might be a heroin addict but he also has deductive skills similar to Sherlock's.
* KnifeNut: Pulls a knife on John during their first meeting and gets a sprained wrist in return.
* SherlockScan: Pulls it on Watson, recognizing his shirt wrinkles imply he folds all his shirts in that manner because it makes them easier to pack, thus he dresses at the office once he's showered there. Holmes is impressed by this, so Billy tries to show off some more but gets it wrong on account of not knowing Watson personally.
* TheyCallMeMisterTibbs: Tried to pull it off by claiming to have a codename amongst the druggies as "The Wig." Sherlock doesn't buy it.