This is the second episode this season that Carolyn McCormick (Dr. Elizabeth Olivet) has appeared in, the other being "Pathological (2018)." This season marks her first appearance since the season 14 episode "Deadly Ambition (2013)." Before that, she hadn't been seen since the season two episode Abuse (2001).
This is the second part of the two-part season finale.
The bar in which Stone and Benson have a drink is called Maxwell's. The previous story had a character named Maxwell.