- Actor Allusion:
- In "Frederick Barnes", Robert Sean Leonard plays a medical researcher.
- David Strathairn has played CIA officer Noah Voson, who uses his position against the good guys.
- In "Mr. Kaplan Part I" a thief played by Aldis Hodge mentions the concept of "Leverage".
- The Architect, who organizes a hacking contest, is played by Brent Spiner, who plays the aptly named Data on Star Trek: The Next Generation.
- In Season 6 Episode 3, while defending himself in court, Red tells the Judge that he once stumbled upon Supreme Court Justice Antonin Scalia while on a fishing trip. This is a reference to the series finale of Boston Legal, which Spader starred on as Bunny-Ears Lawyer Alan Shore.
- California Doubling:
- In "Frederick Barnes", the title criminal puts a briefcase full of a toxin on a train in the Washington, D.C. Metrorail subway system (which in the background you can hear them announcing Washington subway stations over the Public Address system ["Woodley Park", "Dupont Circle"]) which kills dozens of people. Only thing is, the trains and stations are not from Washington. They're probably from Baltimore (the nearest city to Washington that also has a subway) or someplace else. The reason being is that the Washington Metropolitan Area Transit Authority ("Metro"), which operates the D.C.-area system, has a policy that they will not permit filming of any program or movie that shows violence committed on a Metrorail train or in a station. Also, while train operators do announce their train and its destination on its internal speakers and the train's external loudspeakers when they arrive at a station, Metro does not announce train arrivals on a station's PA system, that's reserved for system-wide announcements like general train delays (when there is a big game or a major public gathering) or when there have been service disruptions due to train or track problems.
- It happens again in a courtroom in the courthouse in Arlington, Virginia (which is about 6 miles from Washington). The building used is not the Arlington County Courthouse, as it's more like a Federal Courthouse in Los Angeles or New York. The Arlington County Courthouse is on a plaza across from the county jail; the courthouse shown in the episode was approached by a long staircase similar to the New York City one seen in Law & Order.
- Cast the Expert: The actor playing Red's chief of security Baz also happens to be a former CIA officer and veteran US Marine who founded an NGO which rescues kidnapped Children in the sex slave trade.
- The Danza:
- Alan Alda plays a character whose first name is "Alan".
- Baz is played by Bazzel Baz.
- Hollywood Homely: In Season 4, Aram - played by a very good looking Indian/Middle-Eastern actor - is perplexed as to why his hot new girlfriend is with him, and speculates with Samar as to what messed up reasons she might be with a stereotypical IT geek like him. When she reassures him that she might like him for his many good qualities that don't include his looks, he says that he's a 4 on looks, or at best, a 6 on a good day.
- Jossed: Season 2 Episode 20 confirms that Liz is not Red's daughter; her mother was a Russian woman associated with the KGB, who Red knew and he's watching over her in part because of that. So that theory is out... probably. It's hard to say for sure, and given Red's habit of lying even this might be the truth. The one thing we can be (almost) sure of is that Liz isn't the daughter of Red who he left behind along with his wife when he went rogue.
- What Might Have Been: Frank Grillo was one of the actors originally considered for the role of Reddington, but had to turn it down due to conflicts with Captain America: The Winter Soldier.
- The Wiki Rule: Located here.
- Written-In Infirmity: Megan Boone announced she was expecting her first child around season 3; that season, Liz is heavily pregnant with Tom's baby and gives birth to a girl while being chased by Mr Solomon.
Trivia / The Blacklist