When Reid is going to the train to fake the surgery, he walks past a cop and a SWAT operator taking cover behind a car. The cop has a red safety plug in the barrel of his pistol that wasn't edited out in post-production.
When the team is riding in the SUV early in the episode, the camera shows the vehicle from the outside and there is no one in the back seat.
Elle was traveling to Dallas, yet she flew into an airport 637 miles away, in El Paso, and then took a train back (north and east) to Dallas. Dallas/Fort Worth has an international airport. The Amtrak trip from El Paso to Dallas takes 29 hours 30 minutes.
In the train from West Texas, there is a Washington D.C. Metrorail map hanging on the wall.
Reid: (to Dr. Bryer) The voices, they helped you right? While the other kids were outside in the playground you were inside studying, reading, learning. The voices wouldn't stop. They helped you understand things that other people couldn't realize. Then as you grew older it became almost a responsibility, right? A responsibility to use that ability, to use your knowledge.
Reid: The voices, they won't stop. They've been talking to you since you were a child.
Leo: He's telling you I'm not real. He is lying to you.
Dr. Bryar: You're lying to me.
Reid: That's Leo speaking; that's not even Dr. Bryar. Why won't you let him think for himself, Leo?
Dr. Bryar: You...can you see him?
Reid: Yeah, he's right there.
Reid: I know what it's like.
Dr. Bryar: Make it stop!
Reid: I know what the voices are like.
Reid: Tardive dyskinesia.
Morgan: Once more for those of us who don't have an encyclopedic memory?
Reid: Could you guys do me a favor?
Reid: Could at least one of you look like you're going to see me again?
Hotchner: See you when you get back.
Morgan: Dammit, Reid, I said don't take the vest off.
Elle: (complaining) Gideon, will you tell him that I don't need to go to the hospital?
Gideon: Regulations are regulations. You're all right?
Elle: Yeah, I'm fine, "Dad."
Gideon: Don't ever call me "Dad" again. (walks away)
Elle: (to Reid) What do you think he'd feel about "Mom?"
Reid: Let me know when you're going to do that so I can run.
Elle: Um, Reid, you probably saved my life in there.
Reid: Probably? I totally saved your life. (smiles) And I'm pretty certain that it was caught on tape.
Morgan: And remember, play into the guy's fantasy, believe it yourself.
Reid: Actually, did you know that dentists and surgeons have been secretly recruited to implant these during otherwise normal medical procedures? This has been happening on and off since the late 1930s. (Morgan looks at him) Told me to believe.
Morgan: Come on, Reid, what are you talking about? A magic trick?
Reid: Yeah, I'm talking about a magic trick.
Reid: Albert Einstein asked, "A question that sometimes drives me hazy: Am I or are the others crazy?"
Gideon: Robert Oxton Bolt once wrote, "A belief is not merely an idea the mind possesses; it is an idea that possesses the mind."
The song heard in this episode was "Wrecking Ball" by Gillian Welch.
Reid mentions Ralph Tortorici taking a classroom full of students hostage because he thought microchips had been implanted in his body. This happened in 1994 at SUNY Albany. All of the hostages survived but one man was injured during a struggle for Tortorici's gun. Tortorici committed suicide in a correctional facility in 1999.
Reid mentions mathematician John Nash as an example of someone who suffered from delusions, and Morgan says that he saw the movie. The movie about Nash is 2001's A Beautiful Mind, directed by Ron Howard and starring Russell Crowe.