* 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]].
** 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 played by Gabriel Macht's real-life wife.
* RealitySubtext: WordOfGod has it 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 Victor Garber) who simply retired and is content to live in an idyllic mansion with at least his dogs while collecting dividend checks from the firm. This means that season 2 could have been a much lighter and softer season.