This is Rosalee's first appearance. The first scene Bree Turner filmed was the scene where she's attacked in the basement of the spice shop; she had only arrived in Portland that afternoon and was feeling ill from already (unknowingly) being pregnant with her second child.
The opening quote, and loose plot are from the fairytale "The Donkey Cabbage".
Written on the wall of the drug den is "Nicht lange danach überkam die Katze wieder ein Gelüste" roughly translates to "Not long after, the cat felt a craving again" and is from The Brothers Grimm story: The Cat and Mouse in Partnership.
When Sgt. Wu (Reggie Lee)is shown sitting on the sofa in his house there is a poster on the wall behind him for a fictional movie, "3 Calls to Murder", starring Tyler Beem and Doreen Vantyne. Director Rob Bailey had worked with Tyler Beem on other TV series, and Doreen Vantyne is a member of the Grimm Makeup Department. Beem was a production assistant for "The Thing with Feathers" and "Happily Ever Aftermath."
Adalind acquires coeur diable (devil heart), rot inguen (possibly red groin), and essigblasse (pale vinegar) from Freddy's shop.