It is revealed in this episode that Detective Olivia Benson is experiencing post-traumatic stress syndrome after nearly being sexually assaulted by Captain Lowell Harris in the season nine episode Undercover (2008). She is barely sleeping at night, and is seeing a shrink for her problems. She is also having flashbacks, which are shown in clips from that episode.
In the episode, ACS caseworker Tonya Majeski seems surprised that Detective Benson doesn't recognize her anymore. She informs Benson that they've worked together on previous cases. The cases she refers to are played out in the season eight episodes Informed (2006) and Pretend (2007)
Detective Odafin Tutuola mentions to Captain Cragen that he filed a request for transference three months ago, because of the resentment toward his colleague Elliot Stabler. The two Detectives had several heated arguments in the previous episode about Chester Lake. Cragen later reveals that Fin's transfer request became buried because of an ex-friend of his back in Narcotics was now dealing with handling transfer papers and Fin had hooked up with his girlfriend
Christopher was taken to the Lydia Hotel which the detectives call Skank Central. In the episode Impulsive (2007), the SVU located Shane Mills there.