* ActorAllusion: At the start of ''Dirty Little Secrets'' Mike worries that Louis knows about his dirty little secret, and Harvey jokingly comments "You're Canadian?", which gets a [[SarcasmMode sarcastic laugh]] out of Mike. Patrick J. Adams, the actor who plays him, is Canadian.
** The name "Specter" for Harvey is a [[ShoutOut subtle nod]] to Gabriel Macht's role as Film/TheSpirit.
** Jacinda Barrett being cast as Zoe, one of Harvey's old flames. She and Gabriel Macht are married.
** Gina Torres says "Welcome back, Zoe", having played Zoe Washburne on {{Series/Firefly}} and {{Film/Serenity}}.
** Rachel is both half-black and a foodie, both nods to Meghan Markle.
* ColbertBump: The ending song of the second episode of season 2: Time Go by Caught A Ghost.
* DuelingShows: With ''Series/MadMen''
* HeyItsThatGuy:
** GinaTorres is Jessica Pearson.
** [[TheNineLivesOfChloeKing Valentina]] is investigating a district attorney for suppressing evidence.
** [[{{Series/Deadwood}} Silas Adams]] is the chief engineer for a racing-engine company that Harvey is trying to save from bad management.
** [[Series/{{Justified}} Mags Bennett]] is the head of a nurses union threatening to strike.
** Film/TheSpirit is apparently now the best closer in Manhattan.
** [[Series/TheWire Daniel]] [[{{Series/Damages}} Hardman]] is at it again.
*** And here I thought he'd settled on [[Series/BreakingBad cooking meth.]]
** [[Film/BoondockSaints Young Noah MacManus]] is Frank Carvello.
** Mike used to be [[{{NCIS}} The Cybervid Killer]]'
** [[Film/{{Glitter}} Dice]] is Stephen, and seeing how he's [[spoiler: incarcerated for having ordered two murders]] he's also [[Series/{{Survivors}} Tom Price]].
* OldShame: InUniverse
** Harvey never talks about his days working as a prosecutor in the DA's office and it is not mentioned in his official bio. Few people at the firm know that he worked there and only Donna knows what he is so ashamed of.
** Whatever happened to Louis on [[NoodleIncident June 3rd, 1997]]. He's so panicked that [[TheOmniscient Donna knows about it]] that he offers to buy her silence. With cash.
* RetroactiveRecognition:
** Pearson-Hardman collaborates with a London firm led by none other than [[Series/GameOfThrones Lord Varys]].
** Catelyn Stark also shows up in season 3.
* RealLifeRelative: Zoe is acted by Gabriel Macht's real-life wife.
* RealitySubtext: The mock trial in "Play the Man", regarding Rachel's self-defeating tendencies and failure to pass the [=LSATs=]
* WordOfGod has that Sarah Rafferty and Gabriel Macht have known each other for over 20 years. Hence the good acting chemistry between the two actors. Supposedly, he actually suggested her for the role of Donna.
* WhatCouldHaveBeen: Search for a youtube video with the words "Jessica Pearson Phillip Hardman". The idea is that instead of the whole evil embezzling Daniel Hardman, Jessica's predecessor was one Phillip Hardman (played by a different actor) who simply retired, and now lives in an idyllic mansion with at least his dogs. This means that season 2 would have been a much lighter and softer season.