* CreatorBacklash: Creator/MandyPatinkin has gone on record saying he considers his tenure on the show the biggest mistake of his acting career, due to how disturbing he found its content, despite critics widely praising his performance.
* HeyItsThatGuy:
** [[Series/{{TwentyFour}} President John Keeler]]/[[Series/{{Dexter}} Captain Matthews]] is Gideon's mentor.
** Gideon himself is [[Film/ThePrincessBride Inigo Montoya]].
** [[Series/TrueBlood Andy Bellefleur]] is a hostage taker on a train in season one.
** [[Series/TwentyFour Ira Gaines]] apparently became a serial killer.
** [[Series/TwentyFour Syed Ali]] is a mob boss in season one.
** Before becoming an agent for a shadowy government organization, [[Series/PrisonBreak Gretchen]] worked for the FBI's Child Crimes Unit.
** [[Film/SpyKids Juni Cortez]] shows up in the second episode of season two as a young kid with strange connections to pedophiles.
** [[Series/MalcolmInTheMiddle Malcolm]] is a graphic novelist in Season 3.
** [[Film/TerminatorSalvation Young Kyle Reese]] is a young boy with fantasies about murdering prostitutes, and [[TrueBlood Nan Flanagan]] is his mother.
** [[Film/TheTerminator Adult Kyle Reese]] shows up later as well, in season 4 as a detective.
** [[Series/{{Dexter}} Lundy]] apparently got his skills as a profiler by being a serial killer for over thirty years! [[Series/HomicideLifeOnTheStreet Sgt. Kay Howard]] was nearly one of his victims.
** [[Series/DawsonsCreek Dawson Leery]] is a serial killer with multiple personalities, and [[Series/PrisonBreak Charles Westmoreland]] gives the team some information on him and his father.
** [[Film/ConAir Billy Bedlam]] is a war veteran whose brother suffers from PTSD.
** Reid is an old friend and rival of [[Series/TwentyFour Sean Hillinger]].
** [[Series/TrueBlood Hoyt]] is a human-hunter towards the end of season 2.
** [[Film/{{Brick}} The Pin]] is the Footpath Killer.
** Erin Strauss is possibly better known as [[Series/TwentyFour Karen Hayes]].
** A murder victim in season 3 is [[Series/LieToMe Emily Lightman]], and her best friend's father [[Series/{{Lost}} arrested Kate]].
** [[Series/LieToMe Jimmy Doyle]] and Ian Doyle are not only played by the same person, but are [[{{Expy}} very, very similar characters]].
** [[Series/LieToMe Gillian Foster]] is another serial killer.
** It would appear [[Series/TwentyFour Ryan Chappelle]] took a job as a detective.
** Hey, that's [[Series/TwentyFour Abu Fayed]] in the Season 4 premiere!
** [[TrueBlood Holly]] is the admirer of a serial killer.
** A cult that captures Prentiss and Reid is lead by [[BeverlyHills90210 Dylan McKay]]. [[Series/{{Lost}} Frank Lapidus]] is an old associate of his.
** [[Series/StarTrekTheNextGeneration Wesley Crusher]] is a serial killer, and [[Series/{{Lost}} Ethan Rom]] is one of his targets.
** The kidnapped boy's mother in "The Instincts" is [[Series/TwentyFour Lisa Miller]].
** Xander Berkeley, [[Film/Terminator2JudgmentDay one of]] [[Series/TwentyFour the most]] [[{{Film/Taken}} notable]] "That Guys" [[{{Film/AirForceOne}} of all time]], is a detective, and amazingly [[spoiler: he actually isn't the bad guy]]
** [[Series/{{Lost}} Jacob]] moonlights as a cop in his spare time.
** [[Series/TheXFiles Assistant Director Skinner]] as the [=UnSub=] in "Normal", with [[MurphyBrown Corky Sherwood]] as his wife and [[Series/{{Firefly}} Zoe Washburne]] as the Cop of the Week.
** Back in 2004, Dr. Rowling from "House On Fire" [[Series/{{Lost}} crashed on an island and was separated from his wife]]. Heather Vanderwaal from "Reckoner" was in the same section as him.
** [[TheOutsiders Ponyboy]] is now a serial killer. [[ETTheExtraTerrestiral ET]] would be so disappointed in him.
--> "Yep. I got stabbed by Ponyboy. So much for staying gold." --C.T. Gibson
** [[Series/BuffyTheVampireSlayer Xander Harris]] apparently really does like smart girls.
** [[Series/MadMen Duck Phillips]] is the head of the congressional committee investigating the team at the start of season seven, proving that he's a schmuck across all time periods.
** [[Series/{{Glee}} Sue Sylvester]] is also Reid's schizophrenic mother.
** Jackson Rathbone, who plays Adam Jackson, is mostly known for his roles in ''Literature/{{Twilight}}'' and ''Film/TheLastAirbender''.
** Alex O'Laughlin, a.k.a., Vincent Rowlings, is now the lead on another CBS crime drama, Series/HawaiiFive0. He's also [[{{Moonlight}} Mick St. John]]
** You'll surely recognize Bud Cort if you've seen ''HaroldAndMaude''. Beth Grant has appeared in various movies, including ''Film/{{Speed}}'' and ''NoCountryForOldMen''.
** And this isn't the first time Joe Mantegna has played a [[{{JoanOfArcadia}} no nonsense law enforcement officer who "doesn't work with psychics"]]
** [[Series/{{Bones}} Wendell Bray]] apparently rapes and kills strippers in his free time.
** [[Series/{{Heroes}} Noah Bennett]] is a manipulative child abductor.
** [[Film/DeathstalkerSeries Deathstalker]] shows up as the dad of a young psychopath.
** Creator/RobertEnglund shows up in "Heathridge Manor" ... [[PlayingAgainstType as a detective.]]
*** Same with [[Series/BuffytheVampireSlayer Drusilla]]... as a mentally unstable woman yet again, though she's not a vampire this time.
** The [=UnSubs=] from "Dorado Falls" and "Closing Time" used to [[Film/{{Contact}} work at SETI helping Jodie Foster talk to aliens]].
** [[RaisingHope Frank]] apparently not only has a model of Natesville with dolls of the townspeople, but has a thing for taxidermy and collecting human eyes.
** Both [[Franchise/MassEffect Garrus Vakarian and Kaidan Alenko]] have appeared as [=UnSubs=] in Season 8.
** Looks like [[Series/OnceUponATime Dr. Hopper]] needs to really see a psychologist.
** It seems [[Series/{{Leverage}} Parker]] is Reid's mystery girl with a stalker.
*** And that stalker is [[Series/BuffyTheVampireSlayer Dawn]], gone completely batshit. Maybe the First Evil got to her?
** [[StarWars Luke Skywalker]] is the Replicator, though his manner is much more like the Joker.
** Prentiss used to work for [[{{Supernatural}} Balthazar.]]
** [[Film/ChildsPlay Chucky]] shows up in Season 8.
** [[Franchise/Left4Dead Rochelle]] survived the zombie apocalypse, got a job as a doctor, and is now dating Morgan in Season 9.
** [[Machinima/RedVsBlue Caboose]] left the UNSC and became a detective in Kansas, possibly inspired by a vigilante [[YouAllLookFamiliar he heard about while in New York]].
** [[Film/IronMan Raza]] takes JJ hostage in episode 200.
** [[Series/TheOfficeUS Kevin]] gained a few dozen IQ points and became the unsub in "Fatal"
** [[Film/DeathRace Lists]] plays the unsub [[spoiler:and his twin]] in the first two episodes of Season 9.
** [[RealGenius Lazlo Hollyfeld]] is a spree killer in "The Road Home".
** [[Series/DesigningWomen Anthony Bouvier]] is Rossi's good friend Harrison Scott.
** [[Series/LoisAndClark Clark Kent]] lost his job, became a gambling addict, and found a new superpower: super-luck, triggered by murdering people.
* RetroactiveRecognition:
** The twin sisters who are the targets of a FBI agent's obsession in "Broken Mirror" is now Morgan Brody on ''{{Series/CSI}}''
** The unsub in "L.D.S.K" is now Lassiter on ''Series/{{Psych}}''.
** "Derailed": Dr. Bryar is now Andy Bellefleur on ''TrueBlood''.
*** And in "Open Season", one of the killers is Hoyt from the same show.
** Before Aaron Paul's breakout role as Jesse Pinkman in the critically-acclaimed series ''Series/{{BreakingBad}}'', he was Satanic cult leader Mike Zizzo in "The Popular Kids".
** A pre-fame Amber Heard plays Lila Archer in "Somebody's Watching".
*** The same episode had Peter Jacobson, who became Dr. Taub on ''Series/{{House}}''.
*** It also featured Katheryn Winnick as Lila's stalker. She played Booth's girlfriend on season 6 of ''Series/{{Bones}}'' and now is the shieldmaiden Lagertha in ''Series/{{Vikings}}''
** Jane Lynch, who plays Reid's mom, is now [[StarMakingRole extremely well-known]] for playing Sue Sylvester on ''Series/{{Glee}}''.
** Several actors who played bit parts/recurring roles on ''Series/{{Supernatural}}'' are minor characters in this show. "The Thirteenth Step" has Jess as one half of a young couple on a killing spree, Lilith's child vessel was abducted to be {{Stockholm Syndrome}}d into a twisted Roma marriage in "Bloodlines", Lucifer's second-choice vessel was a cop in "Brothers in Arms", and Rufus was an unhelpful police chief in "Legacy."
** AntonYelchin, now known as [[Film/StarTrek the new Chekov]] and [[Film/TerminatorSalvation teenage Kyle Reese]], appeared in "Sex, Birth, Death" as the prime suspect.
** Several actors who played characters on ''Series/{{Desperate Housewives}}'' have guest-starred on this show. Rex Van de Kamp was the defense attorney Hotch profiled in "Tabula Rasa", Zachary Young was the unsub Reid identified with in "Elephant's Memory", and Tom Scavo was part of the family the unsub was targeting in "The Caller".
* RecycledScript: Billy Flynn's origin is nearly identical to Frank's, and he has a lot of similarities to Karl Arnold/The Fox.
* WhatCouldHaveBeen: The show was originally going to be called ''Quantico'' and Gideon was originally named Jason Donovan. An early version of Hotch was described as a "blond haired, blue eyed Mormon" and Lukas Haas (the guy who played The Footpath Killer) originally auditioned for the part of Reid, and might have even got it if he hadn't begun expressing doubts about doing a series.
** When Creator/MandyPatinkin left the show, the producer's first choice for a replacement was Creator/HarveyKeitel.
** A tweet by the creators mentions that Reid was originally intended to be bisexual. It was scrapped by the fourth episode.
* TheWikiRule: [[http://criminalminds.wikia.com/wiki/Criminal_Minds_Wiki The profile indicated that there would be one.]]
* WordOfSaintPaul: Matthew Gray Gubler says that Reid is mildly [[http://tvdramas.about.com/od/criminalminds/a/matgraygubint.htm autistic]].
* WriterRevolt: In "JJ", listen very closely to the dialogue. AJ Cook was let go from the show for purely financial reasons, a decision that the cast and crew obviously reviled, and the subplot is about how her promotion is being forced by "people above their pay grade" (the network). She really lays into them in her closing monologue in place of the usual ending quote.
** Considering how the writers, the cast and the ''entire'' fanbase '''hated''' [[ScrewedByTheNetwork what the network executives did]], there is a general consensus that the TakeThat against them was entirely justified[[note]]and cathartic[[/note]] (and one of the few times when a WriterRevolt has been fully supported by more than just fanbase splinter groups).
** Fortunately there is a happy ending to all this as Cook became a series regular again at the start of season seven. The main reason she was let go was so the execs would have money to do that [[Series/CriminalMindsSuspectBehavior spin-off]], [[LaserGuidedKarma but it got cancelled after only 13 episodes]]. With their funds now freed up, CBS soon rehired Cook, perhaps knowing that there would be a good chance of a sharp drop in ratings if they didn't bring her back.
** [[http://www.tvguide.com/news/criminal-minds-kirsten-vangess-aj-cook-may-be-leaving-1065089.aspx Old habits die hard, though.]] But, fortunately, it was resolved before the season began.
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