Although the show has used many real Portland addresses, sites, and business names, "Stillman Park" is nonexistent and "Portland pioneer William Stillman" a fictional historical character. The park scenes were shot in Laurelhurst Park at SE Cesar Chavez Boulevard and SE Stark Street.
The opening quote is from the 1955 movie The Seven Year Itch (same title as this episode). "When something itches my dear sir, the natural tendency is to scratch."
Rosalee's name on the ultrasound monitor was "Rosalee Calvert Monroe."
The title is a reference to the 1955 movie of the same name which starred Marilyn Monroe and Tom Ewell.
The episode marks the first ever shown winged Wesen.