In this episode we see a victim from a previous case; Sarah Walsh played by Sofia Vassilieva. Her character was first introduced in Season 13 Episode 6 "True Believers (2011)", where she is raped in her own apartment and her rapist is put on trial.
Munch has a tattoo of the word "love" on his right wrist. You can clearly see it when he answers the phone in the final scene.
Sofia Vassilieva plays rape victim Sara Walsh. A suspect of her rape was also a suspect in the rape of a woman named Celine Dubois. Dubois was the last name of her character in the hit television show Medium (2005).
Speakeasies are notorious public locations that were popular during the Prohibition Era (1920-1933), to bootleg alcohol for customers. In recent years, youth and social cultures have brought back the tradition of speakeasy events and haunts to popularize the novel spirit of exclusive, group-oriented nightlife, as well as for retaining connections to history.