Double D is found hiding out in Room 213 of the Lydia Hotel. Ironically, this was the same room in the same hotel where Olivia found Horace Gorman's body in the episode Control (2003) - just two episodes earlier.
Milo Ventimiglia is the third cast member of Gilmore Girls (2000) to guest star on Law and Order: Special Victims Unit. Previously, it was Kelly Bishop in season one and Liza Weil in season three.
Stephen Lang has been on three different versions/episodes of Law & Order (as of 5-14-20), as Michael Baxter on Escape (2003) on Law & Order: Special Victims Unit (1999), as Terry Dorn in New York Minute (2005) on Law & Order (1990) and as Axel Kaspers in Revolution (2009) on Law & Order: Criminal Intent (2001).
This episode stars Nancy Allen who played Officer Anne Lewis in the Robocop trilogy, and Michael Kenneth Williams who went on to play Officer Jack Lewis in the RoboCop (2014) remake.
Craig Bierko (Andy Eckerson) also appeared in S17.E16, as a different character.