A long running thread about Olivia Benson being in a relationship with an older man when she was a teenager is revisited in this episode, with the man in question being revealed to be named Burton Lowe. It was first mentioned in season one's Wanderlust (1999) and a flashback from this episode is shown with Benson discussing the relationship with Elliot Stabler. In season six's Intoxicated (2005), Benson further discussed the subject with Casey Novak with a flashback from that episode shown several times throughout this episode.
Olivia mentions that she went on a romantic trip to Paris with someone. The person she is referring to is Ed Tucker, who suggested they go on that trip in season seventeen's Heartfelt Passages (2016).
After learning Nick's new company assists in cold case investigations, Liv comments that it seems like a good fit for him. Prior to joining "SVU", Danny Pino was best known for his role as Scotty Valens in Cold Case (2003).
This episode has the most former main characters appearing out of any episode in any show in the franchise, with three. Nick Amaro and Donald Cragen return after a six year absence, their last appearance being in the sixteenth season. Melinda Warner also appears in this episode in her first episode of the season. If counting the appearances of Elliot Stabler and Casey Novak in flashbacks, the total of returning characters would be five. It should also be noted that Cragen does not appear in person, but rather via a video conference with Rollins and Amaro and a Facetime call with Benson.
Melinda Warner mentions that an ME Rodgers worked on the original case in 1996. This is most likely a reference to Elizabeth Rodgers, the character played by Leslie Hendrix on the original Law & Order (1990).