The "Haunted House" is listed for sale by Real Estate agent Suzanne Acker, sister of bad cop/wesen Officer Acker from the last two episodes.
Opens with the quote, "He felt now that he was not simply close to her, but that he did not know where he ended and she began." This is from Tolstoy's Anna Karenina.
Rebecca Wisocky (Lily) would go on to play a ghost in Ghosts.
Lily works at the "Overlook Restaurant," a possible homage to the Overlook Hotel in Stephen King's ghost story, "The Shining."
One of the Ghost Seekers is named Ray/Raymond, as a nod to Raymond Stantz from Ghostbusters.