The song David Lee (Zach Grenier) is listening to on his headphones is W.S. Gilbert & Arthur Sullivan's "I've Got a Little List" from The Mikado.
Julianna Margulies (Alicia Florrick) & Howard McGillin (Lloyd Garber) previously worked together on episode 4.20, Of Past Regret and Future Fear (1998), of ER (1994) as Carol Hathaway & Herrguth respectively.
James Zeiss, who has an uncredited role as a lawyer in this episode (and episode 7.14 Monday (2016)), also had an uncredited role playing the part of a union worker in episode 1.2, First Week (2017), of The Good Wife spin-off, The Good Fight (2017).