The story the unsub forces his victims to read to him is an old Danish fairytale called The Troll's Daughter.
In the scene when Brooke Lombardini is rescued, Hotchner tells the paramedic that she was dosed with barbiturates and the paramedic orders 2 mg of Narcan. Narcan (naloxone) is for opiate overdose only (heroin, morphine, oxycodone, hydrocodone, etc.) and would have no effect on barbiturates.
In the scene at the restaurant with Hotch, Prentiss and Det. Fulwood, the green van in the background is lettered "Bernero Linen Service." The same van was used in "Mayhem," but the signage was "Bernero Hospital Linens."
Reid: (about Prentiss' birthday) 7:12 AM, October 12, 19...
Stanley Usher: With all due respect, sir, you may not know what she needs. Your job is to apprehend the perpetrators.
Rossi: We're not talking about my job.
Stanley Usher: Well, maybe we should be because there are a lot of people out there that don't believe in what you do either.
Prentiss: So if I wanted to embalm a body, what would be the process?
Morgan: Start with some nose plugs.
Garcia: Oh, you are just jealous because you don't have the magic ingredient.
Prentiss: I do have the magic ingredient. It's called Splenda.
Rossi: "For those who believe, no proof is necessary. For those who don't believe, no proof is possible." Stuart Chase
JJ: "...and so all the night tide, I lie down by the side, of my darling my darling, my life, my bride. In the sepulcher there by the sea, in her tomb by the sounding sea." Edgar Allan Poe
Thomas Gibson and guest star Vondie Curtis-Hall previously worked together on Chicago Hope.
This episode marks A.J. Cook's return to the series following the birth of her son.
Guest star Mercedes McNab and Nicholas Brendon worked together previously on the television series Buffy the Vampire Slayer.
The Edgar Allan Poe quote in the opening sequence is from his poem "Annabel Lee," which is about the death of a beautiful woman.
The psychic's name was Stanley Usher and the unsub's first name was Roderick. Combining those two names creates the name Roderick Usher, a character from Edgar Allan Poe's "The Fall of the House of Usher."
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