The scene where Ray is waiting in the stalker's home and offers him an ultimatum: "The bag or the bat" is very similar to the Tom Clancy character John Clark giving a similar ultimatum "The knife or the needle" in "Without Remorse." Liev Schreiber played John Clark in The Sum of All Fears (2002).
In this episode a Dexter billboard is visible in an overhead shot. Dexter (2006-2013) is another Showtime series.
Both Liev Schreiber and Jon Voight star in The Manchurian Candidate (2004) in which Schreiber's character is named Raymond.
Liev Schreiber and Josh Pais previously co-starred in the hit horror film Scream 3 (2000).