!The Entire Cast
* HotScientist: Calleigh is a blonde, leggy Southern girl who likes guns, Natalia is a tall, curvy latina, Eric is half-Cuban/half-Russian, Ryan has perfectly tousled hair and Maxine Valera is fairly cute. Also, yes, some people ''do'' find David Caruso sexy.

!Horatio Caine

* AtonementDetective
* CoolShades: And how!
* DeathGlare: While PerpSweating.
* DeadpanSnarker
* DramaticPause
* FanNickname: Super H.
* FatalAttractor: He has notoriously bad luck with girlfriends. They always seem to die.
* {{Flanderization}}: He used to have moments when he would [[DullSurprise actually emote]].
* FriendToAllChildren
* GlassesPull: Caine's main gimmick, always followed by a QuipToBlack and the ''''YEAAAAAAAHHHH--'''' sample.
* GoodIsNotSoft: His response to being told a adult film director suspected of murdering one of his stars has two daughters is a great example.
-->"Would they be appearing in your movies when they are older? Just out of interest."
* HardBoiledDetective: Though he's technically on the force, fits this trope to a T.
* JumpingOffTheSlipperySlope[=/=]StartOfDarkness[=/=]DarkerAndEdgier: Seems to be going this way after his near-death experience. He is noticeably more vicious and ruthless, savagely beating a suspect and even letting a man fall to his death as he begged for Horatio to help him. Granted, one man had killed a police officer and was involved in a kidnapping, and the other man was a pedophile with a ''long'' history of abducting and molesting young female beauty pageant contestants, but ''still''.
-->'''Pedophile:''' *While hanging onto a ledge* I can change - I know it!\\
'''Horatio:''' I doubt that.\\
'''Pedophile:''' *His fingers starting to slip* You have to help me!\\
'''Horatio:''' *Coldly and dispassionately, while stepping away from the man* Do I?\\
'''Pedophile:''' *Falls to his death*
** The pedo's case was a bit more galling because he revealed/implied that he was also a victim of sex abuse before Horatio appeared - his favorite hiding place was where his "special friend" took him when he was a child.
** There's another episode which ends with Horatio confronting a man whose job was supposed to be protecting pedophile victims who turns out to be a pedophile himself. Horatio tells him he's resisting arrest, to which he fearfully replies that he isn't (and he wasn't; he was just standing there). Horatio responds "We'll see how long that lasts." as he removes his sunglasses and wristwatch. He then steps towards the suspect as the scene [[SmashToBlack Smashes To Black]] to the credits.
** And yet Horatio allows the murderer of [[spoiler:his wife, who's also Delko's sister]] to live.
*** He did go after him in Brazil. [[spoiler: And killed him not only for Marisol's murder, but for killing his brother and trying to corrupt his nephew.]]
* LukeYouAreMyFather: He has a son he didn't know about.
* OneLinerNameOneLiner
* PapaWolf
* PunctuatedForEmphasis: Just about every line out of his mouth.
* RedHeadedHero
* TheStoic
* ShootTheHostage: Mostly averted.
* StealthHiBye: Master of Stealth Hi.
* TeamDad

!Calleigh Duquesne

* CombatStilettos
* MsFanservice
* SouthernFriedGenius: Blonde, gorgeous Southern belle - who knows more about ballistics than the rest of the team combined.

!Tim Speedle

* EveryoneCallsHimBarkeep: Speed, never Tim or Mr Speedle.
* {{Jerkass}}: Definitely had his moments, usually when speaking to women. He told one victim of harassment that it was her fault and she'd lead the guy on (she hadn't), and was rude to other female characters (excepting Alexx, Megan, Calleigh and Yelena).
* TemptingFate: When walking into a jewelry store with Horatio, Speed discusses expensive cars, disdaining them in favor of his bike. Caine mentions that he might need "something with doors" some day. Speed says he has plenty of time. He is fatally shot not five minutes later.

!Eric Delko

* ButNotTooForeign
* ButtMonkey
* ChewToy
* DeathGlare: While PerpSweating.
* MrFanservice
* [[spoiler:TheMole]]: [[spoiler:Was working for Internal Affairs during his relationship with Calleigh.]]
* [[spoiler:MysteriousParent]]: [[spoiler:His biological father is a very dangerous Cuban gangster.]]
* PutOnABus: To be on ''UglyBetty''. Returned when it got cancelled.

!Ryan Wolfe

* DeadpanSnarker
* JerkAss: Occasionally. He's usually called on it, though.
** JerkWithAHeartOfGold: Even so, he's proven to be a very capable cop, and extremely compassionate when he needs to be.
* LastNameBasis
* SuspiciouslySimilarSubstitute: For Speed.
* TallDarkAndSnarky

!Yelena Salas

* ChuckCunninghamSyndrome
* FairCop
* WhatHappenedToTheMouse: Her final appearance was in the Season 7 finale, when she assists Horatio with an escaped and dying fugitive; although she was advertised as being billed for more guest appearances, her character and her son's character were dropped with no announcement instead, invoking ChuckCunninghamSyndrome.

!Natalia Boa Vista

* MsFanservice
* TheLabRat: At first.
* LifeImitatesArt: The actress' sister's image was found among the many, many photographs of SerialKiller[=/=]''The Dating Game'' contestant [[http://www.cracked.com/article_19505_5-real-murderers-more-terrifying-than-any-horror-movie.html Rodney Alcala]]. Fortunately she wasn't a victim and the story was later RippedFromTheHeadlines, with her sister in a cameo (also not as a victim).

!Maxine Valera

* TheLabRat

!Alexx Woods

* TheCoroner
* MyNaymeIs: Spelled with one too many x's.
* PutOnABus: Alexx leaves the morgue in Season 6 to become an ER doctor. She's occasionally appeared since then, usually when one of the team have been injured in the line of duty. She returned for a few appearances past that.
* TeamMom: Mostly to her corpses.