Kathy Griffin was Mariska Hargitay's improv teacher at the Groundlings theater company in Los Angeles.
Jennifer Restivo (Janet Burnell) also played the role of Melissa Blume in episode 15.9, Rapist Anonymous (2013).
The opening scene, where the couple walks out of the restaurant and gets robbed, was filmed at Bamiyan Afghan Restaurant, on 26th Street & Third Avenue in New York. The restaurant is now closed.
The statement heard in this episode "A vampire cannot enter a room unless he is invited", is incorrect, based on vampire folklore. It is typically a person's home that they must receive an invitation for, before being able to enter; and not individual rooms. The Vampire invitation notion may stem a seventeenth-century Greek vampirologist, Leo Allatius, who was "possibly the first modern author to write a book on vampires." In 1645, he finished "De Graecorum hodie quirundam opinationibus", where he referenced the need for a vampire to be invited into a potential victim's home before they could enter. Bram Stoker also mentioned the rule in his famous novel "Dracula" (1897). The vampire invitation code has also been implemented in TV and film, such as Buffy the Vampire Slayer (1997-2003), True Blood (2008-2014) and The Vampire Diaries (2009-2017).
Det. Tutuola (Ice-T) says "Think Black Sabboth or Judas Priest. Only sicker and more violent". Black Sabbath were an English rock band formed in 1968, with Ozzy Osbourne as the vocalist. They are often cited as pioneers of heavy metal music. Osbourne's excessive substance abuse and wild behavior led to his firing in 1979. Judas Priest were an English heavy metal band, formed in 1969. They are frequently ranked as one of the greatest metal bands of all time.