The unsub in this episode suffered from "asymbolia." Also called pain disassociation, this condition is manifested by pain that is perceived, but does not cause suffering, and often results from injury to the brain.
Reid stated he was an MIT graduate; however, when it has already been established in Season 4 ("Memoriam") that he chose CalTech over MIT.
Hotch and Rossi stated they were part of the FBI team 10 years previously after the shooting at the school; however, Rossi was retired from the FBI at that time. In Season 3, Strauss mentions it had been 10 years since Rossi was at the FBI.
JJ: You played basketball?
Reid: I didn't play- I coached basketball, then wrote down the opposing team's shooting strategy.
JJ: Is that why Morgan kicked you out of the pool last week?
Reid: Yeah, it took him three rounds to realize I was hustling him.
Reid: (whispering to Morgan) I will crush you.
Reid: (to Morgan through his MP3 player) We interrupt your regularly scheduled musical selection with an important announcement. Never wage a practical joke war with a MIT graduate because we have a history of going nuclear. Now sit back, relax, and enjoy the dulcet sounds of me screaming in your ear. AHHHHH!!!!!
(Morgan yanks off headphones)
Morgan: Okay, that was cute kid, but that's all you got?
(Reid snores loudly then smiles when Morgan's phone rings and he answers answers) Hey, baby gir...
Reid: (through phone) AHHHHH!!!!
(Rossi picks up a white towel and waves it)
Morgan: Uh, huh. All right Reid, it's on. Just know that paybacks are a bitch.
(Reid snores loudly once again)
Reid: (looks at ringing cell phone) Son of a bitch! (answers phone) Hi. This is Dr. Spencer Reid. I actually can come to the phone right now...with a very special message...your mother is...
Reid: Sorry. I'm really sorry. I don't know what got into me.
Morgan: (to the press) Feel free to call me if you have any other background questions. My phone number is 702-555-0103.
Reporter: What is your name, sir?
Morgan: Doctor Spencer Reid -- R-E-I-D.
Hotchner: How did you get by in Paris?
Prentiss: I played a lot of online Scrabble with a girl named "CheetoBreath."
Reid: "You may leave school, but it never leaves you." Andy Partridge
Hotchner: "Your pain is the breaking of the shell that encloses your understanding." Kahlil Gibran
The songs heard in this episode were "City Boy" by Shawn Lee & AM and "Music for a Nurse" by Oceansize.
Production on this episode wrapped on August 19, 2011.
Garcia: So, as you can see from your board there, this kill list is weirdly similar to high school. Group one is like the popular kids, football team, prom queen, Dean's List. The Heathers, if you will.
"The Heathers" is an allusion to the movie Heathers (1988) starring Shannen Doherty, Lisanne Falk and Kim Walker, which was about a girl who half-heartedly tries to be part of the "in crowd" of her school.