* ChannelHop: From [=NBC=] to [=USA=] with Season Seven.
* ColbertBump: Goldblum shamelessly plugged the show on ''Series/TheColbertReport'', and Creator/StephenColbert himself guest starred in Season 3.
* CreatorBreakdown: Unlike other shows in the franchise, which are ensemble affairs, ''CI'' focused nearly-exclusively on Goren, and required Creator/VincentDOnofrio to have a punishing workload. D'Onofrio eventually had to be hospitalized for clinical exhaustion, so the producers brought in a second detective team and began the alternating format in consideration of their lead actor's health problems. Goren's weight gain throughout the later seasons of the show is also attributable to D'Onofrio's health issues.
* TheDanza: [[Creator/JameySheridan James "Jamey" Sheridan]] as Capt. James Deakins.
* HarpoDoesSomethingFunny: In the special features of the Season 1 DVD, the producers say that after hiring Creator/VincentDOnofrio they basically allowed him to do whatever he wanted, leading to many FunnyMoments and one of the most distinctive characters in the crime genre.
* MissingEpisode: The episode "The Glory That Was..." has been taken out of rotation since after its first airing due to the ColdOpen having a scene with two women in bed together. The episode is not even on the season eight's [=DVD=]. Also, the episodes "Slither" from season five and "Beast" from season four have had certain lines ("He didn't have a pot to piss in" and "She was a restaurant hostess who put coke up her crotch!", respectively) either muted out or removed altogether when aired in syndication, although the line in the latter episode was eventually restored.
* OldShame: Creator/ChrisNoth considers his time on the show to be this, not because of the show itself, but rather his poor working relationship with Creator/DickWolf. The men have had bad blood since the controversial removal of actors Dann Florek and Richard Brooks, as well as the firing of Michael Moriarty from ''Series/LawAndOrder'' back in TheNineties. Eventually, this led to his own firing from said show after he openly complained about Wolf, which resulted in his character written off as [[PutOnABusToHell being transferred]] [[ReassignedToAntarctica to Long Island for ten years.]]
** When Kathryn Erbe became pregnant with her second child, a pregnancy arc was written out for Eames in which she acted as the surrogate mother for her sister's child. This of course resulted in an ObviousPregnancy later that season.
** Also the case with Julianne Nicholson; her first pregnancy was avoided by having the character PutOnABus for the first half of Season Seven, but the second time they wrote it in.
** When Creator/JameySheridan was affected with [[http://en.wikipedia.org/wiki/Bell%27s_Palsy Bell's Palsy]], so was Deakins (who donned an EyepatchOfPower). At times it was obvious the poor guy was visibly struggling with it and was having a hard time saying his lines.
** Imagine if Goldblum had decided to film a few more episodes for the series ender. Nichols and Goren cracking a case together would've just been awesome.
** Apparently, there were plans to write an episode that revealed that Nicole Wallace [[spoiler: wasn't dead]], but said plans never came around to making it into an actual episode.
** There were plans for L&O, SVU, and CI to have a major crossover with Goren being the central character investigating a potential terrorist plot. Then 9/11 happened and the plans were abandoned and never revisited while the Mothership and CI were still on the air.
* TheWikiRule: [[http://lawandorder.wikia.com/wiki/Law_%26_Order_Wiki Law and Order Wiki.]]
* WrittenInInfirmity: For Nicholson's second pregnancy.
** Creator/CarriePreston has appeared in three different episodes as three different characters.
** So has Susan Misner.
** Jay O. Sanders played a memorable killer-of-the-week in one episode back in 2002; he plays Capt. Hannah in the final season.