In this episode, character Eddie Lamb states that when Radley shut down as a sanitarium, the patients either were released or were sent to The Quiet Sisters of Mercy in Riverdale. This of course is a nod to the show Riverdale which indeed has a place (The Quiet Sisters of Mercy). Roberto Aguirre-Sacasa is a creator/writer/producer on both Riverdale and Pretty Little Liars: Original Sin.