Christine Baranski (Diane Lockhart) & Lisa Edelstein (Celeste Serrano) previously worked together on episode 4.6, Earthquake (1997), of Cybill (1995) as Maryann Thorpe & Kristen Clark respectively.
Matt Czuchry (Cary Agos) & John Doman (Oliver Cardiff) previously worked together on episode 2.10, Dial 'O' for Murder (2003), of Hack (2002) as Jamie Farrel & Hanratty respectively.
Chris Noth (Peter Florrick) & Isiah Whitlock Jr. (Ira Protopapas) also worked together on episode 5.11, Guardian (1995), of Law & Order (1990) as Mike Logan & Antony White respectively.
Chris Noth (Peter Florrick) & Alex Draper (Joel Branch) also worked together on episode 2.4, Asylum (1991), of Law & Order (1990) as Mike Logan & Nathan Robbins respectively.
Chris Noth (Peter Florrick) & Rick Holmes (Dr. Howard Farland) also worked together on episode 3.3, Forgiveness (1992), of Law & Order (1990) as Mike Logan & Bill Lynch respectively.