The beginning of the show, when Christina Ricci's character takes off her top and proceeds to do a breast cancer self-examination while a black bar is superimposed over her breasts is highly reminiscent of a sketch done on the premiere episode (season 6, episode 1) of Saturday Night Live (2016)'s ill-fated 6th season in a commercial spoof for the American Cancer Society where Gail Matthius performs a breast self-examination while a black bar is imposed over her breasts.
In Cary's hotel room, Cary (Matt Czuchry) and Alicia (Julianna Margulies) are watching CSI: Crime Scene Investigation (2000), to be specific, the Season 6 episode A Bullet Runs Through It: Part 1 (2005).
Nathan Lane and Christine Baranski previously appeared together in the film, The Birdcage (1996), and also off-Broadway in Lips Together, Teeth Apart, and The Man Who Came to Dinner.
Chris Noth (Peter Florrick) & Skipp Sudduth (Jim Moody) also worked together on episode 5.17, Act of God (1995), of Law & Order (1990) and episode 7.20 Neighborhood Watch (2008) of Law & Order: Criminal Intent (2001).
Chris Noth (Peter Florrick) & Megan Byrne (Commissioner Liza Bix) also worked together on episode 5.8, Saving Face (2005), of Law & Order: Criminal Intent (2001) as Mike Logan & Judy respectively.