[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/csiny.jpg]]

SpinOff from ''Series/CSIMiami'' itself [[SpinOff spun]] from ''Series/{{CSI}}'' (2004- 2013) set in New York City. The show's [[CharacterDevelopment character work]] is probably its strongest aspect, with multi-season arcs for several of the characters, particularly Mac, Danny, and Lindsay. The cast is full of [[DysfunctionJunction slightly messed up]] characters, all the way from Mac down to Adam. In fact, the coroner is probably the most well-adjusted person in the lab. In general this is handled well and doesn't devolve into {{Wangst}} territory.

Note: Due to the way Wiki/TVTropes' custom title database works, to link to this page, type [=Series/{{CSINY}}=].

----
!!This show contains examples of:
* AbsoluteCleavage: Many of Stella's outfits highlight her cleavage, but in Episode 4.03, "You Only Die Once", Stella wears a scintillating black dress that drops all the way to the top of her stomach.
* AbortedArc: Peyton's single episode return in the end of the sixth season was hyped as the beginning of a love triangle. The season would have ended with Mac trying to choose between the feelings he still had for Peyton and the early-stage relationship he was beginning with Aubrey. Who he picked would have been revealed in the beginning of season seven. However, Claire Forliani got a part on ''{{Series/Camelot}}'' and couldn't return for more episodes, plus Melina Kanakaredes decided to leave the series, pushing the writers to put aside that plot to focus on the newly-arrived Jo.
* AbsurdlySpaciousSewer
* AbusiveParents: Adam. And the VictimOfTheWeek a time or two.
* AccentRelapse: 'Yarzheit'- man pretending to be Jewish is revealed to be a German former Hitler Youth soldier. Even after 64 years of pretending to be a non-practicing Polish Jew, marrying a Jewish woman, and raising an Orthodox Jewish son, he reverts to his German accent when his crime is revealed.

* AdventuresInComaland: In "Near Death", Mac is shot in the back and left, well, near death. While he is being operated on, he journeys through a limbo that looks like the crime lab where he meets and has conversations with his friends (and his dead wife).
* AfterlifeAntechamber: It looks a lot like the lab.
* AllYourBaseAreBelongToUs: The lab gets stormed in "Snow Day" and the precinct gets it in "Today is Life."
* AllThereInTheScript: Mac's full name was in an early script, but has never been said onscreen. ([=McCanna=])
* AloneWithThePsycho: Both Stella and Jo
* AlphaBitch: She [[spoiler: pretended to be homely girls' friends, doll them up, have her boyfriend have sex with them, rated the experience online, and give the girls a big necklace so everyone would know. The sister of her victims strangled her and then part of her house fell on her]]. Her name was Libby.
* AlternativeForeignThemeSong: The ending theme for the Japanese version is [[http://www.youtube.com/watch?v=6V9rl2mtKA0&feature=related "The First Day Without You"]] by Dreams Come True.
* AmicableExes: Jo and Russ. Although he didn't like Jo being a career woman, they're still friendly and even have some UST in the ep he appeared in.
* AndAnotherThing: Detective Flack did this once. When he made to leave, the door gave him a Eureka Moment; he realised that the victim's door had been locked from the outside, so whoever killed him must have had a key.
* AndIMustScream: "Blink."
* AndStarring: Eddie Cahill gets an "And"; Hill Harper the "With".
* AnonymousBenefactor: Sid, who gave away much of his pillow patent fortune to the families of 10 victims whose cases had deeply touched him after discovering he was [[spoiler: most likely dying of cancer and wanted to ensure it went to do some good.]]
* ArsonMurderAndJaywalking:
-->'''Mac''': You're under arrest for the murder of Derek James, Lauren Salinas, kidnapping and attempted murder of a crime scene investigator, armed robbery, grand theft auto, assault and battery. But most of all, for pissing me off.
* AsLongAsItSoundsForeign: There are some odd choices for character names from time to time, like that one girl named Risa Calaveras ("Laugh Skulls" in Spanish).
** The Egyptian suspects in 'Seth and Apep'. An Egyptian viewer posted on another site that their names weren't Egyptian at all, but another Arabic-speaking area
* AssholeVictim: In "Who's There?," [[spoiler:the victim was purposefully destroying his family's company, liquidating every cent they had, destroying the future of his own daughter, just to spite his estranged wife.]]
* AuditThreat: Flack does this a fair bit.
* AuthorTract:Gary Sinise seems to have influenced Mac's dialogue about veteran-related issues now and then. 'Fight Night' is a noticeable example.
* BaseballEpisode: The season one ep where the killer was a player, and Danny got to use the pitching skills from his aborted baseball career.
* BathroomStallOfOverheardInsults: A girl hiding a bathroom stall who overhears two cheerleaders insulting her becomes a vital plot point in "Do or Die".
* BattleInTheRain: sort of. In "Snow Day", half the fight is done soaking wet because someone shot the sprinklers accidentally and set them off.
* BeardOfSorrow: Danny probably qualifies after the season 6 opener.
* TheBet: Danny and Lindsay in "Snow Day."
--> '''Danny:''' There's no way you're gonna make this shot, too, Montana.\\
'''Lindsay:''' A Benjamin says I do. ''(shoots the billiard in the hole)'' Now you owe me $100.
** Danny and Mac in "Fare Game". Danny bets Mac $5 that Lindsay won't eat the bug cuisine he brought back after a case involving it. Lindsay eats it and Danny has to pony up to Mac.
--->'''Lindsay''' Never bet against a country girl.
** Part of the second episode of season 8 was a betting pool about when Mac would return to the lab
** In 'Nine Thirteen', the entire subplot is the group trying to figure out whether or not Lindsay is pregnant, though they never explicitly state it until the end. After she tells Danny in the last scene, the others are shown paying up their bets to each other. And then Mac appears to have had one going with Christine as well.
*** It's extremely likely that they had a bet going, since he said that she owed him ten bucks before he relents and agrees to get evidence.
* BewareTheNiceOnes: After Danny jokingly asks Lindsay how she'd get away with killing him and suggests that she used her forensic know-how to clean up the scene, she responds that she ''wouldn't'' clean up and claim that Danny was a DomesticAbuser. Her "performance" is kind of eerie, to say the least.
** Another time they're discussing what to do if the other dies: Danny wants a two-week long wake (first week for mourning, second week for partying) and Lindsay "jokingly" declares that she'll haunt him and any future girlfriends forever ''while eating all of his cannolis''.
* BigEater: Lindsay
* BlondeBrunetteRedhead: The car jacker's three daughters (blonde and brunette went into the family business, redhead went to law school)
* BloodBrothers: Stella and her foster sister. The foster sister still had some of Stella's blood in a necklace vial, which led to it getting found at a PA crime scene during the ''ColdCase'' crossover.
* BodyInABreadbox: Probably the most prone to this of all the [=CSIs=], because bodies found in generic NY alleys would get pretty dull after a few weeks.
* BodySushi: A Season 1 episode has the VictimOfTheWeek turn out to have been poisoned at one of these. The perpetrator was a young woman who worked as one of the tables; she had previously been a personal assistant to the victim. [[PsychoLesbian The victim had fired the young woman and destroyed her career for refusing her sexual advances]]; the victim then proceeded to specifically request her former PA at the restaurant (the only place the young woman could find work), where she subjected the young woman to more sexual harassment. Because refusing a customer request was likely to get herself fired, the former PA had laced her nail polish to get her revenge (the victim liked to eat sushi off her former PA's toes).
* BoobyTrap / DeathTrap: An inventor's house, designed to gruesomely off his enemies. Stella narrowly avoids getting skewered by one of the traps
* BoundAndGagged: Christine while she was being held captive in 'Seth and Apep'
* TheBoxingEpisode: 'Tales From The Undercard'.
* BratsWithSlingshots
* BreakTheCutie: Danny and Flack have both gone through this; Danny is involved in several fights with Mac, has been held hostage and had the ''shit'' kicked out of him by a gang of drug dealers, has been implicated in the shooting of another officer, and having his brother put into a coma while trying to save him from (another) murder rap. Flack has gotten blown up, had to participate in the investigation and arrest of his mentor, had problems with his sister, and [[spoiler: his girlfriend died]]. Adam came pre-broken [[SadClown but hides it well most of the time]], but has also been held hostage and roughed up (with Danny, from above), among other things.
* BreastPlate: in some episodes, Stella wears a rather low-cut BulletProofVest, exposing part of her cleavage--and the heart area.
* BrokenPedestal: Mac, Danny, and Flack have ''all'' had former partners turn up again and turn out to be bad.
* BrooklynRage: Danny, at times. He's settled down a little since becoming a family man, but his short temper can still get him into trouble.
* BulletholeDoor: The third season finale featured a group of robbers breaking into the lab vault in this way. Done slightly more realistically than most of the examples of this trope, involving a .50BMG sniper rifle (i.e. a BFG) and taking most of the episode.
* BuryMeNotOnTheLonePrairie: In "Misconceptions", Flack discovers a letter from his father expressing his wishes to have his ashes scattered on the diamond at Yankee Stadium. He spends most of the episode persuading his sister to help him do this.
* TheBusCameBack: [[spoiler: Peyton]]
* BusCrash: Aiden's death was a combination of this and StuffedInTheFridge. Everyone expected a case of TheBusCameBack when the episode and Vanessa Ferlito's guest appearance were announced, but the character only appeared alive in flashback. She was found in a burned out car,dead and charred.
* TheCanKickedHim: The woman who got locked in a high-tech public toilet and drowned when its self-cleaning feature kicked in.
* CallingTheOldManOut: Adam,except his dad no longer remembers abusing him.
* CarFu: Lindsay takes out a suspect with her Avalanche when he runs off. She doesn't kill him, though.
* CareerEndingInjury: Danny, who wanted to be a pro baseball player, but got hurt and ended up joining the police instead.
* CatchPhrase: Danny [[LampshadeHanging knows he says "Boom" a lot, and Adam knows he says "What up!" a lot.]]
* CirclingVultures: All three branches of the ''Series/{{CSI}}'' franchise have used the spot-the-vultures technique of finding human remains. Even New York, for a body on a rooftop.
* ClearMyName: Danny (twice -- see BreakTheCutie), Hawkes, and Mac.
* ComatoseCanary: Subverted - it only ''looked'' like a ComatoseCanary.
* ComfortingTheWidow: Danny has sex with the mother of Ruben Sandoval, a kid who was accidentally shot during a robbery and died. Not exactly a widow, but a single mom - pretty much the same idea, though.
* CondensationClue: In "Unspoken", this is how Danny learns that [[spoiler: a would-be killer has been in Lindsay's hospital room]].
* {{Contortionist}}: Who is killed after the box he was folded up in was buried in a beach.
* CopKiller:
** One example is [[spoiler: Flack's LoveInterest, Angell]], who's shot in the season 5 finale while protecting a DonaldTrump[=/=]RupertMurdoch {{expy}}'s son (who was due to testify against him; [[spoiler: the killers turn out to be kidnappers, who knew this would put [[RedHerring immediate suspicion on their target's father]]]]). The episode also ends with [[spoiler: the bar they're holding a wake for her in being shot up in a drive-by]]. Nobody's killed (although Danny ends up in a wheelchair for a while), but it fits the trope in spirit.
** Aiden also counts, despite no longer being on the team. They were dead set on finding the perp and Danny was willing to beat up the guy he thought did it. Mac's speech in the beginning has a double meaning. He's talking about the dead Marine, being one himself, but it clearly shows with Aiden too. " You attack one, you attack us all.".
** Mac himself was a variant in the season 8 finale, having been shot InTheBack after stumbling into a drug store robbery while off-duty. He only ''nearly'' died, but the NYPD's reaction was largely the same as in a straight example.
* CounterfeitCash: Central to the first season finale.
* {{Crossover}}:
** With the other ''[=CSIs=]'', first with ''Series/CSIMiami'' pursuing a suspect wanted in both states,when a kidnapped girl was taken cross country and more recently when [[spoiler: Mac's girlfriend was kidnapped by her shady employee's loan shark and the girl who impersonated her in Las Vegas was killed trying to rob a jewelry store]].
** Also with ''Series/ColdCase''. Stella's foster sister killed someone in PA, and due to their BloodBrothers thing, the necklace she still had with some of Stella's blood caused one of the Cold Case guys to come investigate it in NY. Ended up with LetOffByTheDetective, when Stella found that her friend had killed a man who'd been molesting her.
* CryIntoChest:
** Lindsay,with Danny at the end of 'Not What It Looks Like'
** Christine, when Mac rescues her in 'Seth and Apep'.
* CutHimselfShaving: Lampshaded when Mac finds blood on a suspect's cuff:
-->"Is this the point where I say I cut myself shaving?"
* {{Cyberspace}}: a 2007 episode took place half in ''SecondLife''
* DarkSecret: Often the motive for many of the crimes.
* DarkerAndEdgier / ShinyVsGritty: Initially, and especially compared to ''Series/CSIMiami'' (currently it's only slightly gorier then the ''Law & Orders'').
* DeadPersonConversation: Mac talks to Claire in 'Near Death'.
* DeadlyRoadTrip: One episode had the death of a tourist.
* DearJohnLetter: Peyton does it to Mac, though she apologized later for it, during her [[TheBusCameBack one episode return visit]]
* DeathByFallingOver: It appeared that a main character kills another just by pushing them over, onto a rug. It even going so far as to have them arrested for the murder and even having them admit it. [[spoiler: Later, it's revealed that the victim was just fine and got up after the other character left, only to be killed by someone else immediately after, in a decidedly more fatal way.]]
* DeathInTheClouds: "Turbulence."
* [[DieHardOnAnX Die Hard in a Crime Lab]]: The third season finale, "Snow Day."
* DefectiveDetective[=/=]DysfunctionJunction[=/=]StandardCopBackstory: Let's take it from the top, shall we?
** Mac: 9/11 widower, has been framed for murder, blown up once,seems to attract serial killers like flies to honey,shot nearly to death, his previous girlfriend left him with only a letter (though TheBusCameBack). Spent several months struggling to overcome speech aphasia related to his gunshot injury and nearly lost his new girlfriend because he was too darn stubborn to let her in on what was happening. Then,said girlfriend was abducted and nearly killed before Mac found her.
** Danny: Has been framed for murder ''twice''. The second time, his brother ended up in a coma while trying to clear Danny's name. He's gotten in trouble more than once for losing his temper with suspects, for a while he was suspected of shooting an undercover cop and it caused problems between him and Mac for almost a season. His neighbour's son got shot while Danny was looking after him. Was in a wheelchair from a motive-less shooting. Had his wallet (with ID, credit cards, and badge) stolen by Shane Casey. And then Shane Casey tried to kill him, fell to his death (not!),broke into his and Lindsay's apartment and theatened to kill their daughter, only stopped by Lindsay's shot. Later, he became a sergeant, only to have one of his rookies shoot the wrong man when two guys threatened the group, which had gone out for a drink.(One guy had a gun, but the rookie cop shot the other one.) On top of that, he was accused of having an affair because the same rookie was cozying up to him in a survelience camera tape. She then lied and said Danny told her to lie, nearly costing him his job, though he was cleared when Lindsay pressured the rookie to tell the truth.
** Stella: Orphan, with lingering if mostly well-hidden issues as a result. Had to shoot a stalker ex-boyfriend and had her apartment burnt out by next-door neighbor.
** Lindsay: Witnessed her friends' murder and has been dealing with the lingering trauma ever since. Married Danny who kept secrets from her and was in a wheelchair, and later became traumatized after killing Shane Casey in her own home. Had to listen to accusations Danny was cheating on her after the incident with Danny and his group of rookie cops, though it was untrue.
** Flack: Alcoholic sister, had to arrest his mentor for tampering with a crime scene, which caused problems between him and Mac and between him and the rest of the PD. Got blown up. [[spoiler: Girlfriend [[StuffedInTheFridge shot and killed]], leaving him mentally screwed up for at least the first part of season 6.]]
** Adam: Has hinted at past abuse (definitely psychological, possibly physical as well), and was held hostage and tortured so the criminals could get access to the lab. In the episode "The Party's Over," it's hinted that he may have OCD. His job also seems to be perennially in danger, first from budget cuts and then from one of the other lab techs. He also happened to be playing street hockey when a car bomb went off right next to him. His very secret shame is [[spoiler: he slept through 9/11. He made up for it by going to "The Pile" the next day, although depending on how long he was there he could now be susceptible to cancer]]. Additionally [[spoiler: his dad was/is an abusive jerkass who, thanks to Alzheimer's disease, doesn't remember the abuse or Adam (most of the time - he recognized Adam long enough to tell him what a disappointment he is and looked awfully shifty when Adam asked him about the abuse directly); he does, however, remember how much of an abusive jerkass ''his'' father was]]. Fortunately he has a very understanding girlfriend.
** Sid: Changed careers for unknown reasons. Inhabits a "creepy place" with dead body trivia. The woman he treated like a daughter was murdered after her husband, a former colleague, had to be fired, murdered drug addicts, and turned out to have been stealing organs from corpses while he worked at the lab. And let's not forget having to go to the hospital: once for an allergic reaction, another for getting radiation poisoning while examining a body, and the exploding bullet to the face that would have blinded him if it weren't for his glasses. And having survived all that, he was then [[spoiler: diagnosed with Non-Hodgkin's lymphoma that may well kill him, as it's well advanced.]]
** Sheldon: Lost a series of patients on the table, accused of murder, friend tried to bribe him to change evidence. Lost most of his savings in an insurance scam, resulting in him losing his home and having to sell a lot of his stuff until Mac offered him his spare room to give him time to get back on his feet. His sister was murdered, and his girlfriend left him some years back because she was raped and he ended up not being there like she needed. Got called for having marijuana in his system after his girlfriend was using it and spent time with him, causing him to breathe it in off her.
** Jo: Forced out of the FBI after turning in a [[DirtyCop dirty agent]] that got a rape case she was working thrown out, attacked by the rapist after the victim's father tried to get him caught by framing him, and forced to shoot said rapist in self defense. Lost her sister to a drunk driver several years ago.
* DefenestrateAndBerate: One episode opens with a jilted boyfriend throwing his ex-girlfriend's belongings out of the window at her and her new boyfriend. The last item is her pet dog. When the new boyfriend's legs are covered in blood, the viewer is led to believe that the dog has just splattered on the sidewalk. The camera then pulls back to show the boyfriend has safely caught the dog and the blood has come from a passing truck that was spreading salt on the icy street.
* DirtyCop: Repeatedly. Danny,Mac and Flack have all had former partners or mentors revealed as this.
* DisguisedHostageGambit: Snow Day.
* TheDollEpisode: 'City of the Dolls'
* DontCallMeSir: Mac. Danny plays a joke on his future wife,Lindsay,on her first day on the job,telling her to call Mac "Sir". Mac tells her to stop after a couple times,and she realizes Danny tricked her.
* DontYouDarePityMe: Mac is essentially reacting this way to the aftermath of being shot. He thinks it's his problem to get through, despite people starting to notice and one person saying he should at least tell his GF. Fortunately,he finally did,though only when she was near to leaving him.
* DrowningMySorrows: Flack, after Angell died. Led to his HeroicBSOD.
* DramaticGunCock: Mac was on the recieving end. A rich guy tazed him,kidnapped him,blindfolded him and drove him to a bad part of town before doing it. He then drove off and left Mac. Naturally,Mac doesn't intimidate that easily.
* EasyAmnesia: Averted. Mac took several months of therapy to recover from his aphasia.
* EurekaMoment: Hawkes watches a Jennifer Lopez video during his lunch break. While admiring her, um, assets, he remembers they are insured, helping him figure out the case - it's an insurance scam.
* EvenEvilHasStandards: A hitman turns himself in and spills the beans on his client when said client switched targets from a man to a woman. This hitman doesn't do women.
** The would-be killer in "Unspoken". Lindsay saw him shooting at his intended target and was injured in the chaos. He came into her hospital room intending to dispose of her before she could identify him. But then, he saw the drawing her daughter, Lucy, had made and backed off, realizing she was a mother. It ties into what he later tells the detectives about never wanting to hurt a child. Lindsay dying would have hurt Lucy.
* ExpensiveGlassOfCrap: There was an episode where cheap wine was being passed off as expensive, though that wasn't ultimately why the vic was killed-it involved the killer trying to squash the guy's jewelled cockroach.
* FaceDoodling: In "Get Me Out of Here!", Danny and Adam arrive at a frat house to investigate a murder. They wake up a pledge who has had a pair glasses drawn on his face and the word 'TOOL' written on his forehead.
* FacePalm: At the end of "Oedipus Rex", when the Suicide Girls [[MsFanservice strut away]] and Danny realizes what he's lost out on by turning down one's offer for a date, you can see his arm rising toward his face. It's hard to credence that he's just waving goodbye, so this trope seems likely, even if it fades to black before we see it.
* FalseRoulette: Mac does this to one of Christine's kidnappers as he tries to force the guy to talk in 'Seth and Apep'.
* FanBoy: Mac apparently idolizes UsefulNotes/RonaldReagan judging by the framed picture and "eight-hour documentary [he's] always watching".
* FanDisservice: The one time we see Flack without a shirt, he's got a whopping great hole in his chest where he was seriously injured in an explosion.
* FanService:
** Certain features of Stella are on display a bit.
** Danny ends up [[ShirtlessScene shirtless or in a vest]] a lot.
** Lindsay once took a walk in the rain and ended up in a SexySoakedShirt.
** Mac kicking ass while soaking wet in the season three finale.
** Shirtlless Mac with Peyton in the s3 opener,whether you liked the ship or not.
** Angell in Flack's button down shirt with a pair of handcuffs.
** Mac swimming in the 100th ep.
** The episode about the lingerie football league. Must have been ''designed'' for the MaleGaze.
* AFatherToHisMen: Mac.
* FatalAttractor: Stella Bonasera
* FingerInTheMail: An episode dealt with the heir of a wealthy family who'd been abducted at a young age with his brother. When the family was slow with the ransom money, his brother's ear was cut off and sent to the family; later, the brother was killed. The surviving man kept the ear in a jar of preservative.
** Mac gets a tongue in the mail from Christine's kidnappers in 'Seth and Apep'. It isn't hers, but it did freak him for a while.
* FingerLickingPoison: In "Page Turner", the killer coats the pages of a book in thallium to poison his victims.
* {{Fingore}}: Danny getting his fingers stamped on and broken in the season three finale.
* FiveManBand:
** TheHero: Mac Taylor
** TheLancer: Danny Messer
** TheBigGuy: Don Flack
** TheSmartGuy and TheChick: Stella Bonasera and Lindsay Monroe/Messer trade these off frequently. (Now that Stella's gone, it's Jo and Lindsay)
** SixthRanger: Sheldon Hawkes
* FlashedBadgeHijack: Flack does it in the beginning of the episode "You Only Die Once"
* {{Flatline}}: Mac in "Near Death".
* {{Foreshadowing}}
** A few episodes after Lindsay's introduction and after impressing him with sports trivia, Danny jokingly remarks that he'll have to ask her to marry him if she keeps that up. Three seasons later...
** In the same vein, in a season one episode, Mac says something about how Danny could fall in love one day. Danny laughs it out, but then Lindsay shows up in the next season and...
* ForensicDrama: Obviously.
* FosterKid: Stella
* FrameUp: Hawkes in "Raising Shane".
** Also the serial rapist from Jo's FBI past.
* GlassShatteringSound: "Not What It Looks Like"-it's used to shatter glass counters in a jewelry shop during a robbery.
* GoneHorriblyRight: [[spoiler: A cage fighter was so afraid of a stalker harming his family that when his friend, a homeless veteran, died after an accident he decided to set the body on fire and fake his death. The fighter is eventually found, but he burned the body so throughly that there's no proof the homeless vet ''wasn't'' murdered and the cops will be forced to charge him, although Mac would try to put in a good word (he also got the vet a military funeral).]]
* GoryDiscretionShot: 'Blood Out'. Kinda a requirement when the victim is being dismembered with a chainsaw.
* GratuitousItalian: For the Greek name of Stella Bonasera, whitch means Star Goodnight.
* GrievousBottleyHarm: Danny gets beaned with one while having a drink with his band of rookies.
* GPSEvidence: many times played straight, once subverted because an enemy of one of the investigators figured out that the team chased this sort of evidence.
* HangingJudge: The VictimOfTheWeek in "Crossroads". He was discovered to be a corrupt judge who got kickbacks from any juvenile delinquent he sent to a specific [[HellholePrison hellhole juvenile prison center]]. The Killer Of The Week had his whole life destroyed [[DisproportionateRetribution because he was sentenced to do time for stealing a pack of gum]].
* HappilyAdopted: Jo's daughter Ellie (Not to be confused with Ellie Brass from ''Series/{{CSI}}'')
* HappilyMarried : Danny and Lindsay
** Mac and Christine will be joining them now. If the show manages another season,it will have the most married team members with 3.
* HarmfulToMinors: As a teenager, Lindsay witnessed the murder of several friends. In season three, she is called to testify at the trial of their murderer.
* HeadTiltinglyKinky: "Bad Beat"
* HeroicBSOD: After seven episodes of teetering on the brink, Flack finally has one in "Cuckoo's Nest."
* HideYourPregnancy: When actress Anna Belknap, who plays Lindsay, became pregnant, they used the close-up method with varying success. The second time around, they wrote it into the storyline.
* HitboxDissonance: Came up as a plot point relevant to the motive in one episode. [[spoiler:An Xbox used in a ''GearsOfWar3'' tournament had been hacked to give one player a hitbox half the size it should have been, and everyone else a hitbox twice the normal size.]]
* HollywoodHealing: Although it takes Danny several episodes to learn to walk again in season six, he still goes from wheelchair to cane and then to walking unaided and even running a little too fast, (like, two episodes)with only one instance of complaining that his back hurt.
** Perhaps a more mild form with Mac...it is possible to recover from aphasia over a couple of months, but it still moved somewhat quickly. Not so fast as to make it impossible to believe, but a little bit. And, in real life, it can still re-surface when the person is angry or afraid...and Mac seemed fine the whole time he was worried about Christine in the crossover.
* {{Homage}}: The season three finale is clearly a ''Film/DieHard'' [[DieHardOnAnX homage]]. It is also [[CrowningMomentOfAwesome highly awesome]].
* HouseFire: Stella's apartment.
* ICantFeelMyLegs: Danny, after he was shot in the back.
* IfYouDieICallYourStuff: Danny, to Mac, in 'Slieght Out of Hand', jokingly. Mac was testing coolant gel used by stunt performers during burn scenes.
-->'''Mac''': What other job allows you to set your boss on fire? Going once, going twice...
-->'''Danny''': Sold, but if you go up in flames, I get your office?
* IHaveThisFriend: Lindsay got pregnant, she used this in a spectacularly transparent attempt to ask Stella if she needed to worry about any of the chemicals in the lab affecting the baby.
* [[IHaveYourWife I Have Your Girlfriend]] Christine's kidnappers make her call Mac and talk to him, then they talk, in 'Seth and Apep'.
* ImpersonatingAnOfficer: Shane Casey steals an NYPD uniform and uses it for several episodes.
* ImplausibleSynchrony: The 333 killer will time certain events to happen exactly at 3:33, and he can rest assured that Mac ''will'' be freaked out when he looks at his watch.
* InitialismTitle: Two initialisms for the price of one!
* TheInspectorIsComing: The episode with Quinn. The lab stays accredited, but Lindsay is warned not to let Danny distract her into leaving evidence unattended again. And Quinn flirts with Mac a bit, reminding him about the time before Claire died that they kissed at a party. Mac can't deny liking it, but is firm about loving Claire and that he wouldn't have done anything further. Quinn seemed to possibly hope she might strike up something with him again, but he isn't interested.
* InterserviceRivalry: NYPD vs NYFD in one episode. It involved the two sides playing each other in a hockey game. Fights naturally broke out.
** Regular detectives vs the lab team-Flack and Danny both admit at times that the pure detectives see the lab guys as nerds.
* InTheBack: Danny, in the season 5 finale, and Mac in the season 8 finale.
* ItIsNotYourTime: Mac, with Claire telling him so.
* ItsPersonal: Mac was in the Marine Corps; once a Marine, always a Marine, and he takes that very seriously.
** Also the reason why [[spoiler: Flack killed Angell's murderer in the Season 5 finale]]
** The reason why every member of the team is out for justice first after Aiden is killed,and then in the season 8 finale. She shot Mac, and when you do that, they all come after you. Luckily, they didn't kill her over it.
** If you kidnap Mac's girlfriend,it gets personal real fast. (''Seth and Apep')
* JustifiedCriminal: Two boys trying to pay the rent, who are themselves robbed by a much more conventional robber.
** [[spoiler: Carver's nephew, who killed his abusive mother when she started beating his younger siblings.]]
** [[spoiler: The guy who stole a clown's costume to kill the drug producer who sent a hitman after him. He even gave the clown his day's pay.]]
* JustOneLittleMistake: The only mistake the second killer in "Criminal Justice" makes is [[spoiler: he planted the evidence after Hawkes had sprayed for footprints at the scene, and the distribution of chemicals on the evidence alerts the team to the fact the evidence was planted after]]. Otherwise he nearly commits ThePerfectCrime. Which makes sense, because [[spoiler: he's a DA, and has fifteen years of experience with criminals and the crime lab to know how they work]]. Also a case of MurderTheHypotenuse.
* KeepingTheEnemyClose: Detective Mac Taylor alludes to this trope:
-->'''Detective Mac Taylor''': You know what they say: keep your friends close and your enemies closer - and if that doesn't work, kill 'em.
* KindaBusyHere: It's bound to happen with cops. Mac's goes off once in the middle of watching an opera with Peyton, and once during sex.
* KnightInSourArmor: Just about everyone.
* LampshadeHanging: Sid knows he has a tendency to find weird things while doing autopsies.
* LaserGuidedAmnesia: Really laser-guided with Mac...he can't remember a lot of random words for things after being shot. It's a real condition called speech aphasia.
* LastMinuteBabyNaming: After Lucy is born, Danny and Lindsay don't agree on one right way, leaving fans until the next season to find out whether it was Lydia or Lucy. (Lucy).
* LawmanGoneBad: Mac discovers that [[spoiler: his first partner]] became one of these. Having stolen a large amount of money from a crime scene (he was nearing retirement and didn't think he was being paid enough) and [[spoiler: murdered the girlfriend of the guy who has a vendetta against him and Mac (he doesn't know, then doesn't care Mac wasn't responsible).]]
* LetMeAtHim: Danny, when he sees Mac with the guy initially suspected of killing Aiden (although it was really a recurring serial rapist/killer and not even him.) Mac warns Danny off, telling him they had to do it right.
* LetOffByTheDetective: Stella with her foster sister in the ''ColdCase'' crossover, and several of the team in another ep involving a stalking victim who killed said stalker out of desperation.
* LockingMacGyverInTheStoreCupboard: One episode had Danny and Stella investigating the death of a millionaire inside his mansion's panic room. Danny accidentally trips the room, locking himself inside without a forensics kit. While he's waiting to be rescued, he uses the items found in the room to finish processing the crime scene.
** {{Lampshaded}} by Danny addressing Stella as "Mrs. [=MacGyver=]" as she's walking him through said processing.
** A later episode has Mac and Stella stuck fighting robbers who are trying to steal the Lab's confiscated drugs. Thank god Mac can build a bomb and ''laser trip wires'' from the stuff found in the lab.
* LodgedBladeRecycling: Played realistically in "Epilogue". A security guard is stabbed and pulls the knife out and uses it to stab his attacker. He then bleeds to death from the wound he had suffered which he might have survived if he had left the knife in.
* LoveConfession: Lindsay was the first; she told Danny in season four out of frustration, after he slept with Rikki Sandoval. He eventually reciprocated and they're married now. Mac was the second; his telling Christine was a big step for they guy who grieved for so long. It appears mutual.
* LukeYouAreMyFather: Slightly sideways example; the biological son of Mac's dead wife, who she gave up for adoption, comes looking for her. She died on 9/11, but he and Mac establish a sort of tenuous (Mac's not a people person) father-son relationship when Mac opens up and shares some memories of her.
* MadBomber: "Charge of this Post"
* MamaBear: Lindsay. Threaten Danny and/or Lucy at your peril.
* ManOnFire: Luke Blade, during his magic trick, and the guy he killed replicating the trick.
* MarriedToTheJob: Mac, for most of the series. Re-connecting with, and eventually (presumably, given the proposal) marrying Christine pulled him out of it. Stella, too, sometimes.
* MatrixRainingCode: At least once, in "The Thing About Heroes."
* MileHighClub
* MistakenForCheating: Danny. When one of his rookies shot an unarmed man instead of the armed man who confronted them, she deflected attention from herself by saying Danny was cheating with her and told her to lie. A video from the bar shows her cozying up to Danny and makes Internal Affairs more suspicious,though Danny denies it and insists she came on to him. Lindsay eventually pressures the rookie to admit the truth and clear Danny.
** The Ugly Guy in the UglyGuyHotWife couple in "Blood Actually". His wife, [[LoveMakesYouCrazy who was intensely in love with him]], thought he was cheating so she [[spoiler: gave her diabetic husband regular chocolates disguised as sugar-free ones and replaced his insulin with sugar water. Turns out the "other woman" was a travel agent he was using to plan their 15th anniversary dream vacation.]]
* MistakenForJunkie: Hawkes. His girlfriend was the actual user; he just inhaled marijuana residue from her while they were getting it on. But it showed up in his random NYPD-mandated drug test and Mac was anxious to know what was going on.
* MoneyToThrowAway: In "Brooklyn 'Til I Die", a man tosses handfuls of high value gambling chips into the crowd to create a distraction to allow him to escape the casino. [[spoiler: This turns out to be part of a role-playing game.]]
* MonsterClown: [[spoiler: He's just trying to protect himself from a hitman.]]
* MoodLighting: The show started out rather dark and gloomy. After taking a lot of flak (although not a lot of Flack) for it, the lights were turned up for the second series.
** Added to this is the harsh blue lighting used for the first season (used to make New York look slightly 'colder'), which was eventually found to be ''too'' cold and phased out for the second season.
* MostDefinitelyNotAVillain: Sort of, with LampshadeHanging. When they find a victim wearing an "I ♥ NY" t-shirt, they immediately assume it's a tourist. They're right.
* MurderDotCom: Subverted.
* MythArc: Shane Casey,or at least that ran several seasons on and off.
* NearDeathExperience: Mac.
* NeverFoundTheBody (Or Even DNA): Mac's wife Claire along with hundreds of other real-life 9/11 victims [[spoiler: although the fall 2011 premiere revealed she escaped her tower before it fell...]]
* NeverSuicide: Stella is very (bordering on insanely to the rest of the cast) certain that a young woman who had been searching for her missing twin brother for over a decade didn't kill herself [[spoiler: -- the fact that she shot herself in the ''stomach'' instead of her head or heart is a telling clue]].
* NewYorkCityCops
* NightSwimEqualsDeath: Too many episodes to list. It's usually signaled by finding the body floating in the swimming pool.
* NoBadgeNoProblem: Usually averted since, unlike the original, the [=CSIs=] are also NYPD detectives. However in one episode Mac follows his stalker to Chicago, and tries to throw his badge to get into the Tribune building. Chicago PD had to remind him that badges only work in their jurisdiction and he had no power in Chicago.
* NoDialogueEpisode: "Unspoken". Half the episode was backed by Green Day music and no speech.
* NoNameGiven: Mac, whose full name has never been said, at least onscreen. (Mac can be a name in itself, though Gary Sinise and an early script said otherwise [see ActorAllusion]).
* NoodleIncident: Christine asks Mac if he recalls a time during a vacation when they both got drunk. Mac doesn't want to talk about it.
* NoPhoneTonight: Danny and Lindsay agree not to bring theirs on vacation. Lindsay sneaks hers along to use as a backup camera, but still has it turned off most of the time. This means that it takes a long time to locate its signal (it finally pops up on the grid when Lindsay takes the picture) to find them when Shane Casey comes after them.
* NotSoFakePropWeapon: Variant in 'Fare Game'. It was a blank gun, and the killer just wanted to scare the victim with it,but he didn't realize that at point blank range, it's still a deadly weapon.
* NotMyDriver: The MO of the "Cabbie Killer".
* NotThatKindofDoctor: Averted with Hawkes, who was an MD before changing careers.
* NotWithTheSafetyOnYouWont: 'All Access'. Frankie doesn't know enough about guns to take the safety off when he tries to shoot Stella, giving her the chance to grab it, take off the safety, and shoot him as he continued to try attacking.
* OfficialCouple: Danny and Lindsay.
** Mac has been one half of three official couples: first with Claire (though it's all shown in flashback and referred to in past tense because she died before the series' start), then with Peyton, then finally in earnest again with Christine.
* OffingTheOffspring: [[spoiler: If I recall correctly, what really happened to the Never Suicide girl and her brother: dad killed bro and years later killed sis when she found out.]]
* OhCrap: The look on the face of [[spoiler: the rapist whose case ruined Jo's FBI career]] when he realizes [[spoiler: he left a bullet in the chamber of Jo's gun before tossing it back to her as a taunt]].
** Danny also does this in 'Food For Thought' when Lindsay's wanting a ton of food and Danny thinks she's pregnant again.
* OneOfOurOwn: [[spoiler: Stella shooting her boyfriend and Aiden's murder, two episodes apart.]]
** [[spoiler: Mac getting shot in the season 8 finale, though [[ItGetsBetter he got better.]] ]]
* OnlyBarelyRenewed: Getting season nine came down to it being cheaper to make than ''Series/CSIMiami'' and wanting it for a [[BigApplesauce New York]] themed night of programming.
* OrgyOfEvidence: In "Prey", the CSI team investigate a murder with a large amount of strange evidence; all of it designed to simulate eveidence encountered at early crime scenes.
* OrSoIHeard: Adam gives an in-detail explanation of what a "sploshing" party is before playing this trope hilariously straight. Adam [[RunningGag does this a lot]].
* PaintballEpisode: "Consequences"
* ParanoiaFuel: In-universe (and probably real life) example in the form of [[StoryArc Cabbie Killer]].
* ParanormalEpisode: Mac going into the AfterlifeAntechamber in "Near Death" and seeing his late wife, Claire.
* ParentalSexualitySquick: Evident with Ellie after she and a boy sneak into the apartment and Jo thinks there's a burglar and confronts them, the FBI agent-old friend right behind her.
* PayEvilUntoEvil: The core of both Luke Blade and Brooks in season 9.
* PercussivePickpocket: An episode has Mac catching a pickpocket (who manages to hide his stash before they grab him) just before running into the Victim of the Week. [[spoiler:They later find a security camera video of said pickpocket bumping into their suspect and realise that he stole a camera with vital evidence on it.]]
* PermaStubble: Danny seems to have settled into this after losing the BeardOfSorrow.
* PhraseCatcher: By fifth season, every other character has picked up Danny's "Boom!" Catchphrase.
* PillowPregnancy: The professional shoplifter in "Some Buried Bones"
* PoliceBrutalityGambit: Subverted, a suspect slams his head into the table and says he'll sue. Mac cheerfully explains why his injuries could only be self inflicted and says he injured himself for nothing. The serial killer who [[spoiler: killed himself to frame Mac for murder]] is a much more extreme example.
* PregnantHostage
* PrisonEpisode: "Redemptio"
* PrisonRiot: "Redemptio", again. Shane Casey uses it as part of his escape plan.
* PromotionToOpeningTitles: Sid and Adam in season 5.
* PutOnABus: Peyton in the season four opener.
** Haylen Bacall in Season 6.
** [[spoiler: Stella]] in the season 7 opener.
* {{Pyromaniac}}: The season 9 premiere and second ep were centered on one of these.
* QuipToBlack: Usually Mac or Stella (now Jo) but everyone has their turn
* RageAgainstTheReflection: The woman with the brain condition that prevented her from recognizing her own reflection. She accidentally killed someone after seeing her reflection once, and in the interrogation room, she attacks the two-way mirror, yelling that it's the killer.
* RagsToRiches: Sid. He wasn't exactly poor before, but he wasn't wealthy either. Now he's made a bundle on his pillow invention. And then he gave most of it away after being diagnosed with cancer.
* RankUp: Danny, briefly. He took the sergeant's exam and passed, and was assigned to train a group of rookies. Unfortunately, when he took them out for a drink after hours, they were attacked by two men, one of whom was armed. Danny was knocked out, and later found that one of the rookies had shot the unarmed man, rather than the one with the gun. She got scared and tried to cover by saying Danny was having an affair with her and told her to lie. Lindsay eventually pressured her to tell the truth, and Danny was cleared of any wrongdoing, but decided not to keep the job. He didn't like the long hours away from his family and never felt really at home with the rookies like he did with the team at the lab.
* RansackedRoom: The fake Christine's room in Las Vegas. Also has popped up in a few other episodes.
* RealSongThemeTune: Like all the [=CSIs=], it uses a song by Music/TheWho, in this case [[Music/WhosNext "Baba O'Riley"]].
** Unlike the other two shows in the franchise, this show has adopted a remixed version of the song (from the fourth season onwards).
* RearWindowWitness: "Point of View" pays homage to the classic Creator/AlfredHitchcock film ''RearWindow''; Mac has been severely injured during the pursuit of a suspect and is confined to his apartment, where he whiles away the time observing his neighbors. Mac witnesses a shady deal similar to L.B. Jeffries and his suspicion of his murderous neighbor.
* RecruitedFromTheGutter: One VictimOfTheWeek was an up-and-coming musician who was a homeless drug addict until his girlfriend and her band took him in. [[spoiler: It turns out that they'd been invoking this trope; rescuing a drug addict to join their band and [[MakeItLookLikeAnAccident arranging a relapse/overdose]] when their life insurance had "matured" enough to give them a big payout.]]
* RememberTheNewGuy: The character of Detective Flack did not appear in the "MIA-NYC Nonstop" pilot because he was not conceived until after the episode aired. In "Blink," the series premiere, however, Flack seems to have been part of the team for some time. It's possible that Mac had just been working without Flack in the pilot, but that never seems to happen on any other case.
* RememberThatYouTrustMe: Mac is ''horrible'' about letting people in, even Stella, his closest friend. This has come back to bite him in the ass more than once, including being a huge factor in the failure of his relationship with Peyton, and the huge disaster that resulted after he was implicated in a murder (see TakingYouWithMe). Stella calls him on it in the Season Six premiere, when he's obsessing over [[spoiler: trying to figure out who opened fire on the team at the end of Season Five]] and acting as if he's the only one on the case. He did seem to be improving a bit by the time Christine starts romancing him, but then he slipped into it again with his aphasia condition in Season 9. Jo called him on it once, but he rebuffed her and had to apologize later. It took Christine several episodes and very nearly walking away from him for him to finally get the message and open up to her. How much he'll open up to the rest of the team remains to be seen and, with the cancellation of the series at the end of Season 9, will remain a mystery.
* RiseFromYourGrave: The opening of "Boo".
* RoaringRampageOfRescue: Mac goes dangerously close to the edge when Christine is taken. At least one guy gets shot, and Mac [[FalseRoulette appears to play Russian Roulette]] with another; though it's later revealed that he only pretended to put the bullet in the revolver.
* RoomFullOfCrazy: "Jamalot", "The Ride In". Mac turns his office into one while trying to figure out who's behind the shooting that happened at the end of Season 5.
* RunForTheBorder: The Season Five premiere had the perp try to escape to Canada before Mac caught up with him. Needless to say, he failed.
* ScarsAreForever: [[spoiler: Mac's wife's son still bears scars on his neck from his ordeal with the Cabbie Killer; he hides them with a scarf.]]
** Mac still has scars from being burned by a hot object after a bomb blast in Baghdad. Granted, we can't spot them when he's swimming in 'My Name Is Mac Taylor', but makeup is really hard to manage during a water scene, so it's justified.(although in the season 9 opener, they did manage to show his bullet wound scar from the season 8 finale in a shower scene) The scenes where he's shirtless in bed with Peyton, though...
* SecondEpisodeIntroduction: Flack. His character wasn't conceived until after the pilot on ''CSIMiami'' and made his first appearance in 'Blink', the first actual ep.
* SecretlyDying: Sid, most likely. Non-Hodgkin's Lymphoma isn't *always* fatal, but he did tell Jo that his was pretty advanced. Jo knows, but he asked her not to tell anyone else yet.
* SeductionProofMarriage: Danny after marrying Lindsay. His old partner ribs him about the pretty nurse in the hospital when Danny visits him and this is Danny's reply.
* SemperFi: Mac. And the episode "Heroes".
* SerialKiller: Several. Mac seems to attract them somehow.
* SerialKillingsSpecificTarget: In "Page Turner", the killer poisons his wife with thallium and then coats a book in the library where she works, knowing that others will be exposed to it. After another two people die, he launches a law suit against the city and the library.
* SeriesContinuityError: Danny was said to be from a family of cops, but episodes like 'Tanglewood' and 'Run Silent Run Deep' cast doubt on that. The producers tried to retcon by saying it was extended family, but many still don't buy it.
** Mac tells the victim in 'Blink' that he used to sit with his wife in the hospital as he was sitting with her. This indicates a probable intent to have Claire found near death after the towers fell and then have died of her injuries later. In season 4, though, he tells Reed her body was never found.
** The novel with Mac visiting Claire's grave and the one where he recalls not being able to contact Claire on 9/11 published before the respective revelations (of the body never being found and the fact that they did have a cell phone conversation, albeit one that was cut off in the middle) and novels aren't usually canon anyway, so it's easily excused.
** Stella tells a suspect in 'Until Death Do Us Part' that she lived at Saint Basil's Orphanage until age 18, but in season 4, there was a big plot about her and a girl she shared a foster home with. She could have gone in and out of foster homes when she was a child, always going back to the same Orphanage. In that case, it'd be easier just to say, "I grew up in an Orphange".
** Adam was an only child, but later, his dad accidentally calls him by a name he says is his brother's.
** Christine's brother, Stan,had a different name in one episode. (And there was a character called Corporal Stan Whitney in a season 2 episode, but he was rather minor, and the writers may just have missed it, even with the early intention of the military storyline for Stan)
** Danny's mom was indicated to be dead, then she was alive and watching Lucy.
** Flack mentions a brother in an early season, who is literally never spoken of again, but his sister shows up quite a bit in later episodes.
** Minor one: One episode has Danny appearing to be a Yankees fan, but another indicates him as a Mets fan. That's rare in two team towns for those not into baseball or in the US, people who follow the game usually stand by one team or the other, but not both.
* SeriesFauxnale: The format of the finales of seasons 7, 8, and 9 are this, because of the uncertainty over renewals.
* SexEqualsDeath: It was blissful, unwed and not in the missionary position. Of course [[spoiler: Angell was going to die]].
* SexyCoatFlashing: Hawkes' girlfriend Camille does it at the end of "Food for Thought".
* SexyShirtSwitch: Not Stella or Lindsay, but the mother of Ruben Sandoval
** Also Angell with Flack's
* ShirtlessScene: Danny on occasions, Mac at least twice
* ShoppingCartAntics: In "Obsession", one of the murders centers around a race run using shopping carts and where it is customary to sabotage the other teams.
* ShotgunWedding: Zigzagged. Danny wants to marry Lindsay after the pregnancy reveal, but she initially says no, only saying yes several episodes later when he does a surprise proposal.
* ShoutOut: An episode involving "a time machine" had the TARDIS materialization sound effect in and a ''Series/DoctorWho'' reference.
** The first victim in that episode was named Dr. Martin Browning. A combination of the names Martin (Marty) [=McFly=] and Dr. Emmett Brown from ''Film/BackToTheFuture''.
** The fourth season Halloween episode involves a "zombie" whose cause of death is a [[Film/ShaunOfTheDead cricket bat to the head.]]
** Several to ''Film/TheMatrix'' and ''{{Oz}}'' in an episode that featured Harold Perrineau as an inmate [[spoiler: who's spared from execution when a guard dies. He also killed Sheldon's sister a decade ago, although he wasn't on death row for her murder since it's officially unsolved]] who [[TheAtoner helps Sheldon escape]] when Edward Furlong's character sets off a prison riot (he even gets to say a variation of [[{{Terminator}} "Come with me if you want to live!"]]) while the rest of the Five Man Band uses computerized blueprints on a [[TechnologyPorn touchscreen table]] aid Sheldon.
** ''Possibly'' the overly-serious head of, essentially, [[Literature/{{Discworld}} the guild of New York clowns.]]
** That episode, which kicked off with a murder at a restaurant, included the line [[Film/TheGodfather "Take the guns, leave the cannoli".]]
** "Civilized Lies": This is either a shout-out or a funny coincidence: [[spoiler: A hood nicknamed "Mookie" winds up dying under the [[DominicDeegan Deegan]] expressway]]. The PunnyName title [[spoiler: a la "Fated Fatal" or "A Nimmel House"]] and [[spoiler: the main characters manipulating Mookie's accomplice with faked videos (Deegan is a manipulative ''seer''; the detectives manipulated the suspect's ''sight'')]] could also count.
** "Blood Actually", a set of three short stories, to ''LoveActually'' and ''ValentinesDay'', but unlike the films there's no connections between the characters (unless Sid autopsying the three victims counts).
** Stella is apparently named for [[AStreetcarNamedDesire Stella Kowalski]].
* ShowerOfAngst: Stella
* SiblingYinYang: The Carver siblings: The brother became Chief of Detectives (I think) while the sister [[spoiler: became an abusive, drug-addicted prostitute who was eventually murdered by her own son ''who got away with it'' since he was trying to save his younger siblings.]]
** FoolishSiblingResponsibleSibling Flack and his party-girl sister; Messer and his gangster-ish brother.
* SideBet: Sid, Sheldon and Adam have one about whether Lindsay is pregnant. She is and Sid wins.
* SinisterShiv: In "Nine Thirteen", the BodyOfTheWeek had his throat slashed with a shiv made from a melted coffee cup lid and sharpened to an edge by grinding it against the cell wall.
* SinisterSubway
* {{Sleepwalking}}: "Night,Mother", where a sleepwalking woman was suspected of stabbing a man with a wooden stake. It was found that the real killer stabbed the victim, then the sleepwalker went through the actions she'd seen used to try and save her young son, who died in a car crash years earlier. She did CPR,then tried to reach in and massage the dead woman's heart.
* SoapOperaRapidAgingSyndrome: Mild case with Lucy Messer. There was a 6 month skip in the last ep of season 8,but WordOfGod stated she was being aged up another few months to a year. She was referenced as being 3 at the end of season 8. When she appears in season 9,she should be about 4 or maybe four and a half but Danny said she was 5 early in season 9, and the actress who played her in 'Unspoken' was a six year old.
* SolarPoweredMagnifyingGlass: The arsonist does this in his cell with his glasses at the end of "Where There's Smoke".
* SommelierSpeak: Happens in an episode involving counterfeit wine -- mostly played for laughs, although the actual experts get some respect.
* SpikedWheels: The team ran into such a car (using FrickinLaserBeams to evade the police), and Film/JamesBond is explicitly referenced.
* SpitefulSpit: Hawkes gets it from a notorious racist in 'Yarzheit'. Mac offers to send someone else with Danny to question the guy, since Hawkes is black, but Hawkes won't be intimidated. The guy spits on him,then makes a remark about there not being a law against spitting on an animal. Hawkes stays calm, but Danny, who always did have a quick temper, punches the guy and gets suspended for it.
* StayInTheKitchen: Jo's ex-husband, while he loves her and their kids very much, would rather she be a stay-at-home-mom and they're both too stubborn to give in.
* StepfordSmiler: Detective Flack after [[spoiler: Angell's death]].
* TheStoic: Mac is the embodiment of this trope.
* StrangeCopInAStrangeLand: Mac in Chicago. The CPD does not like him waving his badge to get into a vacant Tribune building floor.
* StuffBlowingUp: Several times...the bomb in the season 3 finale, the season 9 premiere.
* StuffedInTheFridge: [[spoiler: Aiden]]
* SubcultureOfTheWeek
* SundialWaypoint: "Manhattanhenge"
* SuspiciouslySimilarSubstitute: Times two. Jessica Angell was this for Aiden Burn, after the former was PutOnABus. After Angell was KilledOffForReal, Jamie Levato was brought in, and now is the SuspiciouslySimilarSubstitute for the original SuspiciouslySimilarSubstitute. She's even becoming Flack's love interest.
* TakingTheBullet: Danny, for Lindsay in 'Pay Up'. Danny was closest to the bar's window anyway, but it's clear the shooting starts and chaos erupts that he throws himself on top of Lindsay to protect her.
* TakingYouWithMe: When Mac corners a serial killer on a rooftop, the guy jumps off rather than go back to prison. But he does it in such a way that it looks like Mac pushed him, and since Mac didn't wait for backup, there's no one who can say that he didn't.
* TamperingWithFoodAndDrink: In "Blood Actually", a woman murders her diabetic husband by giving him a 2 lb box of chocolates with a sugar-free label on it. Actually, they are normal chocolates. She also replaces his insulin with a sugar syrup, so when he injects himself, he just shoots up more sugar.
* TheTaxi: It was used as a killing device by its driver.
* TeamDad: Mostly Mac to Hawkes, including letting Hawkes stay at his place when Hawkes lost all his money to an insurance scam. Mac to Danny at times too.
* TenMinuteRetirement: Mac's retirement at the beginning of season eight. Danny's promotion to police sergeant (and thus away from the crime lab) also only lasts four episodes before he voluntarily demotes himself and goes back to being a detective.
* ThanatosGambit: [[spoiler: Aiden]] manages to make [[spoiler: her]] murder into one of these.
* ThatOneCase: DJ Pratt, who was finally caught due to his having killed [[spoiler: Aiden]].
** And the kidnapped boy in 'Exit Strategy', Mac had been working that one since his early days as a detective.
* ThatsAnOrder: Mac plays into the bomber's delusion that he's a Marine in 'Charge of This Post', taking on the role of a superior officer to get him to secure the {{BFG}} he's holding.
* ThrowAwayGuns: Done by a perp in "Civilized Lies". He fires two shots at the cops, finds his gun empty and then discards it before trying to flee... and running straight into a third cop.
* TimeSkip: Six months in the end of the season 8 finale, to give Mac time to heal from being shot.
* TragicKeepsake: Mac's beach ball, which he couldn't let go of because Claire's breath was in it. He had their 9/11 opera tickets as well, but let them go in the season 8 premiere.
* TraumaInducedAmnesia: With Mac after being shot, a really selective LaserGuidedAmnesia thing.
* UglyGuyHotWife: The second of the three Valentine's Day stories in "Blood Actally" featured this kind of couple, although from the hot wife's perspective ''she'' was the lucky one to find such a great guy [[spoiler: which made her husband's "betrayal" that much worse; unfortunately the only thing he was guilty of was acting suspicious in front of his apparently insecure wife while planning their surprise dream vacation]].
* UnnaturallyBlueLighting: first season, even worse than usual.
* ValentinesDayEpisodes: 'Blood Actually'
* VehicularSabotage: The murder method in "The Formula".
* ViewersAreMorons: Everything, and I mean, EVERYTHING has to be explained to the viewer, especially during the autopsy scenes. While this is normal for a show about forensic science, the writers like to go a little too far to explain stuff that's common sense to even the average, non-CSI viewer.
* VillainByProxyFallacy: The entire motivation for the Compass Killer.
* WaitHere: Mac tells Danny this in 'Point of No Return', after Danny reveals he forgot his bulletproof vest. Danny obeys at first, then ends up chasing the suspect anyway when he runs outside and into another area. The result is Danny trying to survive a shootout until the others can catch up.
* TheWallsAreClosingIn: In "Death House" the team are investigating a penthouse that has been converted into a series of elaborate deathtraps. Hawkes gets trapped in a small metal room where the walls start closing in on him.
* WeaponizedBall: In the episode "The Closer" the murder weapon was revealed to be a baseball thrown by a free agent pitcher.
* WeHaveToGetTheBulletOut: Averted in a variation. In 'Officer Blue', Mac needed the bullet lodged in the horse to help make his case, but he knew the animal wasn't likely to survive. Fortunately, he did manage to stall the surgery long enough that the horse did make it.
* WhamLine: "Aiden." [[spoiler: Mac, in the episode "Heroes", when he realizes the identity of a body found earlier was a former CSI.]]
* WhereTheyWere: "Oedipus Hex"
* WidowedAtTheWedding: "Until Death Do Us Part". The first bride dies from a formaldehyde laced dress that she didn't know was taken off a corpse. Later, Mac has to stop a groom from suffering the same fate from his tux.
* WorkoutFanservice: Mac's swim in ep 100.
* WorkingWithTheEx: Jo and Russ, twice.
* WouldNotHurtAChild: The shooter in "Unspoken".
* WritingAroundTrademarks: The reference to Facebook pages as 'profile pages' in 'Who's There', without saying the name of the site.
* WrittenInAbsence
** Lindsay was written out for a few episodes during Season three, so Anna Belknap could go on maternity leave.
** Done again in Season five, where Lindsay ended up pregnant with Danny's baby.
* YouRemindMeOfHer: Mac tells Reed that he reminds Mac of Claire, Reed's mother and Mac's late wife. He mentions that Reed has the same stubbornness Claire did.
* YouSeeImDying: [[spoiler:Sid]], to Jo. The phrase isn't said verbatim,and his condition isn't always fatal (though his is advanced), but you can tell it's what he's telling her all the same.
* YourFavorite: Flack tried to help a reporter sweet-talk Mac by telling her his favorite breakfast foods... except he was allergic to one, and abstaining from another.
* YourHeadASplode: A sniper used explosive bullets in one ep. One bullet exploded as Sid tried to remove it from the victim's head, tearing a big hole in it and dazing Sid, whose eyes only survived intact due to his glasses.
* YourPrincessIsInAnotherCastle: "Hung Out To Dry". The plot seems resolved, until Lindsay comes in and announces that Shane Casey escaped.
* ZeroGSpot: Not quite genuine Zero-G, but a couple in one episode got busted for public indecency because they were having sex while bungie-jumping. It's strongly implied that this is the female jumper's personal favorite kink.
----