* ActorAllusion: Reid finding Morgan and Rossi watching ''Series/TheYoungAndTheRestless'' in his hotel room is an allusion to Shemar Moore's tenure on the show.
* TheCastShowoff: Matthew Gray Gubler does magic tricks in RealLife; they incorporated it into his character on the show. Not to mention his talent for artwork, which has also been used in several episodes.
** As is usual for him, Creator/MandyPatinkin got to show off his real-life skills as a home-taught chef in at least two episodes.
** Guest star [[Film/TheLastKingOfScotland Forrest]] [[Film/RepoMen Whitaker]] got to show off his awesome stick-fighting skills.
* 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.
** Since leaving the show, Paget Brewster [[http://my.xfinity.com/blogs/tv/2012/09/19/paget-brewster-i-never-got-over-being-fired-from-criminal-minds/ admitted she "never got over" being fired during the Season 6]] [[ExecutiveMeddling fiasco]], and later admitted [[http://www.enstarz.com/articles/111795/20151003/criminal-minds-season-11-news-paget-brewster-talks-leaving-show-calling-cbs-scummy-video.htm she considers CBS "scummy" for how they treated her (including firing her and then forcing her to return suddenly due to the backlash and her contract)]] - she clarifies however that she ''did'' love the cast and crew themselves, it was the network she took issue with and that was why she left as a regular after Season 7.
* CowboyBebopAtHisComputer: In the Season 7 episode "There's No Place Like Home" which aired in late 2011, a newscaster says a recent tornado was rated an F2 on the Fujita Scale. Except the Fujita Scale was replaced by the Enhanced Fujita Scale in February 2006 and the rating scale changed to [=EF0-EF5=].
** IMDB's trivia page states that Gideon and Prentiss are the only two main characters to have died on the show. While Gideon was shown to be murdered several seasons after Mandy Patinkin left, Prentiss has ''never'' been killed off. She faked her death sure, but she returned soon afterward. She also appeared in the 200th episode, never getting killed off.
* TheDanza: Subverted. Although A.J. Cook jokes that the character was named JJ so she'd be able to remember it (being a blonde), the producers swear they came up with the name before Cook was cast.
* DevelopmentGag: Gideon was originally going to be named "Jason Donovan". In "Extreme Aggressor" that name appears on the cover of a book Gideon finds in a suspect's room.
* DirectedByCastMember: Recently Matthew Gray Gubler got to take the directing skills he's honed on other projects and direct episodes of the show ("Mosley Lane", "Lauren").
** Thomas Gibson directed episodes "Gabby", "Boxed In" and "Lockdown".
** Joe Mantegna directed the episodes "The Road Home" and "Anonymous" (which serves as a tribute to his good friend Meshach Taylor, who played Rossi's former sergeant Harrison Scott).
* ExecutiveMeddling:
** JJ was written out and Prentiss' screen time was reduced for season six, due to budget cuts, leaving Garcia as the only regular female cast member. Naturally, the fans were not pleased. Especially the female fans. And neither is the entire cast and crew, as expressed with, among other things, pointed double-meaning lines in "JJ". It was made worse by bringing in [[SuspiciouslySimilarSubstitute a new female lead]] to replace JJ (though she doesn't have the same job). Thanks to the fans, they were brought back as regulars for season seven and the ReplacementScrappy went bye-bye.
** In light of the producer's comments about always intending to bring JJ and Prentiss back, an alternative explanation from industry workers has appeared on several sites. That explanation being that the producers wanted to more heavily focus on Prentiss for at least part of the season and explore her mysterious past. As part of this they needed someone to have the access that JJ's new job gave her for story reasons. However, experts in union contracts say that AJ Cook was cut as a regular because keeping her at that rank would mean paying her for all episodes of the season even if she was not in them, at a huge expense. Same with cutting back Paget Brewster's contracted number of episodes given that they knew she would be missing from several. But they had always left open a way to bring back Emily at any time both in story and contract.
* FakeAmerican: Jayne Atkinson, a British actress - from Holdenhurst, Dorset, England - playing German-American Erin Strauss - [[MindScrew confusing]]! Of course, "Strauss" is probably her married name.
** [=AJ=] Cook, who plays [=JJ=], is Canadian.
* FanNickname: Agent Mary Sue for Ashley Seaver, by the fans who don't like her.
* HideYourPregnancy: Subverted - both of AJ Cook's pregnancies were written into the show proper (JJ's son Henry is even played by Cook's own real-life son), and the same rules were applied to Jennifer Love Hewitt's pregnancy (and her going on a year-long maternity leave) towards the end of Season 10. The one variable is that the characters became pregnant at a later point than their respective actresses, but this is excusable given the time needed to write them in (and the fact that early pregnancy can vary to an extent in how much it shows).
* {{Jossed}}: During the summer between Season 4 and 5, a small number of fans proposed the theory that the person that shot Hotch in Season 4's final moments was not George Foyet, due to the fact that he wore his signature mask, an unnecessary measure considering that Hotch already knew his identity. The theory went that it would be revealed in the Season 5 premiere that the Reaper we saw was actually a copycat, and possibly that the real Reaper would show up as well. Of course, the shooter really was Foyet, and he gets away again.
* LifeImitatesArt: In "Cradle to Grave", the [=UnSub=] kidnaps women, hides them in his own home-made dungeon, rapes them, impregnates them, and forces them to help each other in giving birth under threat of death. While the BAU compares the perp to Gary Heidnik and Josef Fritzl, his MO is far more close to Ariel Castro, whose crimes weren't discovered until four years after the episode aired.
* NamesTheSame: Billy Flynn, serial killing [[Theatre/{{Chicago}} tap-dancing lawyer]].
* TheOtherDarrin: Randall Garner (the Fisher King) is played by Charles Haid (Part 1) and Charley Rossman (Part 2), though due to the make-up and dubbing, you can't actually tell.
* RealitySubtext: "JJ". So much it practically bleeds into the context.
* RealLifeRelative:
** The victim the team is working to save in "3rd Life" is played by Gina Mantegna (who now credits herself as Gia Mantegna), Joe Mantegna's (Agent Rossi's) daughter in RealLife.
** The two oldest Galen children from the episode "Damaged" are played by real-life twin brother and sister Nicholle Tom and David Tom.
** JJ's son Henry is played by Mekhai Andersen, AJ Cook's son and the actual result of the pregnancy that put JJ into maternity leave in the first place.
* RecycledScript: Billy Flynn's origin is nearly identical to Frank's, and he has a lot of similarities to Karl Arnold/The Fox.
** The team must have caught more home-invader-family-anhilators-with-daddy-issues in ten years than are recorded in most of human history.
* RoleEndingMisdemeanor: Jeanne Tripplehorn was let go after two seasons, [[http://www.foxnews.com/entertainment/2014/08/19/jeanne-tripplehorn-tells-off-mandy-patinkin-after-slammed-criminal-minds-for/ due to publicly criticizing Mandy Patinkin's remarks on the series.]] Patinkin may have abandoned the show, but apparently he's still respected amongst the cast and crew.
** During the filming of season 12, Thomas Gibson assaulted one of the producers, which resulted in CBS terminating him from the show.
* ScrewedByTheNetwork: The reason J.J. left. And the bitch of it is that in the episode directly preceding her exit, "The Longest Night", A.J. Cook does some of the best work of her career. She was even more screwed than usual: Cook wasn't let go because of ratings or a dispute with the cast or crew; she was let go because CBS was pinching pennies to make a spinoff (which failed) and was too cheap to renew her contract.
* 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.
** Originally an episode which revealed Elle had been raped when she was younger was planned, but the actress decided to leave. This was hinted at twice and explains further why she [[spoiler: went crazy and shot the Unsub.]]
* TalkingToHimself: Elisabeth Harnois in "Broken Mirror", when the Davenport twins briefly talk on the phone.
* 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.
* WrittenByCastMember: Kirsten Vangsness co-wrote episodes "Nelson's Sparrow" and "A Beautiful Disaster" with showrunner Erica Messer in seasons 10 and 11, respectively.
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