* ActorAllusion: A possible one, to Goren being [[Film/FullMetalJacket in the military.]]
* ChannelHop: From [=NBC=] to [=USA=] with Season Seven.
* ColbertBump: Goldblum shamelessly plugged the show on ''Series/TheColbertReport'', and Stephen Colbert himself guest starred in Season 3.
* TheDanza: James "Jamey" Sheridan as Capt. James Deakins.
* HarpoDoesSomethingFunny: In the special features of the Season 1 DVD, the producers say that after hiring Vincent D'Onofrio they basically allowed him to do whatever he wanted, leading to many FunnyMoments and one of the most distinctive characters in the crime genre.
* HeyItsThatGuy: [[Film/FullMetalJacket Private Pyle]] is Goren, [[Series/{{Oz}} Shirley Bellinger]] is Eames, [[TheStand Randall Flagg]] is Deakins, [[Series/SexAndTheCity Mr. Big]] is Logan, [[Film/TheFly Seth Brundle]] is Nichols, and [[http://www.imdb.com/title/tt0114781/combined Travis Dane]] is Ross.
** [[TheOffice Jim Halpert]] is one of the [[DawsonCasting high school]] basketball players in "Mad Hops".
** Both [[PerfectStrangers Cousin Larry]] and [[PerfectStrangers Balki]] have appeared on different episodes of the show.
** Tobias Beecher from ''{{Oz}}'' has appeared on the episodes "Baggage" and "30" as different characters.
** None other than [[Series/TheColbertReport Stephen Colbert]] showed up in Season 3.
** [[BarneyMiller Barney Miller]] and [[Film/GoneBabyGone Helene McCready]] played father and daughter in the episode "Suite Sorrow".
** [[Film/{{Jaws}} Chief Brody]] played a serial killer who turned out be [[spoiler:Goren's biological father.]]
** Anita from ''WestSideStory'' is Goren's schizophrenic mother.
** [[Film/{{Ghost}} Carl Bruner]] is Goren's drug-addict brother.
** John Locke and Ben Linus from ''Series/{{Lost}}'' have shown up on different episodes.
** [[Series/FamilyTies Steven Keaton]] appeared in Season 1 as a weirdo who tried to win over Stephanie Seymour with murder.
** [[Series/NurseJackie Sarah Khouri]] was Goren's shrink.
** [[TheWonderYears Karen Arnold]] was Nicole Wallace.
** "Watch your backs, S and B - [[Series/GossipGirl Georgina Sparks]] wants to be a WebVideo/{{lonelygirl15}} {{Expy}}..."
** [[DoogieHowserMD Doogie Howser]] was a Jeffrey Dahmer-esque killer in the episode "Want"
** [[Film/TheMummyTrilogy Beni]] appeared alive and well in the Season 5 episode "Grow".
** [[TrueBlood Sam Merlotte]] pop ups in Season 8. And no, he doesn't get naked.
* WhatCouldHaveBeen:
** 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.