It is revealed in this episode that J.J. Jareau has a niece who is eight years old, which implies she has at least one sibling.
Usually the unsubs/killers are adult males and females (in a few cases). However, Jeffrey Charles became the first child unsub in the series and, therefore, the youngest.
It is revealed in this episode that Reid hates spinach.
The windchimes hanging on the front porch of Finnegan's house are made of bones.
We learn that Reid is still afraid of the dark.
We learn that JJ was afraid of the woods that surrounded her small town growing up. She is also a very good storyteller.
Morgan: You really are afraid of the dark.
Reid: I'm working on that.
Morgan: You should work a little harder.
Coroner: At first blush it looks like Joe Finnegan died of natural causes.
Reid: His heart probably gave out while he was setting this (holds up a bear trap).
Coroner: Yeah, karma's a bitch. These coyotes were gnawing on him for a week.
Garcia: This is true. All complaints filed were false alarms, but then there is that matter of his missing wife.
Reid: Wife? What wife? When did she go missing?
Garcia: Almost 50 years ago.
Reid: No record of her ever being found?
Garcia: I got two words for you, my friend, Rear Window. That guy probably chopped that lady up into delicious, bite-little pieces. Think about it. She may never have left the premises.
Reid: Garcia, I'm sitting in the dark alone. Thanks.
Garcia: While you're waiting for a potential murderer to come home? Kind of dangerous. Kind of sexy.
Garcia: Reid, seriously, people that go inside that house never come out. Spoooky.
Reid: Garcia, could you at least pretend not to enjoy that rumor so much since I have actually entered that house?
JJ: The woods were the only thing I was afraid of when I was a kid.
Morgan: Seriously? I thought you grew up in a small town.
JJ: Yeah... surrounded by woods.
Reid: Did you guys hear that Elle was cleared?
Reid: So it was a good shoot?
JJ: Well, she hit what she was aiming for.
Reid: That's not what I meant.
JJ: I know.
Gideon: Why'd you hurt those kids?
Jeffrey Charles: Because I wanted to.
Morgan: (discussing Elle) She almost died. I'd be drinking, too.
Morgan: (looking at hunting trophies in Finnegan's house) When this is all said and done, I'd like to hang his head on my wall.
Morgan: (about being afraid as a child) The only thing I was afraid of was the dark.
Reid: Some of us still are.
Elle: (saying goodbye to Hotch) You know, when I first joined the team, I couldn't figure out why you never, ever smile. Now I think I'm actually gonna miss that.
Hotchner: (after Elle has walked away) I'm gonna miss you too.
Morgan: (after he and Reid learn the story JJ told them wasn't true) JJ, that was pretty good. Just know that paybacks are a bitch.
JJ: I'm shakin'.
Morgan: Yeah, Reid, why are you still afraid of the dark?
Reid: Because of the inherent absence of light.
Gideon: Unopened bowls of creamed spinach thrown into the trash, each one wrapped with duct tape.
Reid: One with each tray.
Morgan: So we're looking for a guy who really, really, hates spinach.
Reid: Who doesn't?
Elle: I really wanted to be a part of the team.
Hotchner: You were.
Elle: But when I needed the team, I was all alone. I was alone in the one place that I have the right to feel safe, and that's my home.
Hotchner: Plato said, "We can easily forgive a child who is afraid of the dark; the real tragedy of life is when men are afraid of the light."
Garcia: I have two words for you, sweetie: Rear Window. He probably chopped her up into little bite-sized pieces.
Rear Window is a 1954 Alfred Hitchcock movie starring James Stewart and Grace Kelly. The plot involves a photographer who is confined to a wheelchair with an injury and starts spying on his neighbors. He begins to suspect that one of them has murdered his wife and dismembered her.
Reid: Ted Bundy killed women who looked like a girlfriend who jilted him.
Most of Ted Bundy's victims were young women with long brown hair and were similar in appearance to his ex-fiance. Bundy admitted to killing more than 30 women between 1973 and 1978, although the real number is unknown. He was executed in Florida in 1989.
Garcia: Finnegan's house on the hill is like the Bates Motel of Ozona, Texas.
This was an obvious reference to Alfred Hitchcock's classic horror movie Psycho. The Bates Motel was run by the insane Norman Bates (Anthony Perkins) and it was the site of Janet Leigh's famous shower scene.
Boogeyman is the title of a 2005 horror movie directed by Stephen Kay and starring 7th Heaven actor Barry Watson.