While Josh Charles' voice is used for Will in this episode, the actor half hidden in the shadows is clearly not Charles.
Jerry Adler (Howard Lyman), Steven Pasquale (Johnny Elfman) & Michael J. Fox (Louis Canning) also worked together on Rescue Me (2004), as Sidney Feinberg, Sean Garrity & Dwight respectively.
Chris Noth (Peter Florrick) & J.C. MacKenzie (Interviewer) also worked together on episode 5.6, Competence (1994), of Law & Order (1990), as Mike Logan & M.E. Hoeck respectively.
Michael J. Fox (Louis Canning) & Jerry Adler (Howard Lyman) also worked together on episode 1.11, Dog Day Afternoon (1996), of Spin City (1996) as Mike Flaherty & the Police Commissioner respectively.
Alan Cumming (Eli Gold) & J.C. MacKenzie (Interviewer) also worked together on episode 1.5, Heartless (2018), of Instinct (2018), as Dr. Dylan Reinhart & Frank Fallon respectively.