As Prentiss and Morgan are driving together, a tall palm tree can be seen in the background when they pass a side street. There are no palm trees in the District of Columbia.
The episode title, "Valhalla", is the hall where Norse God Odin would receive souls of slain heroes.
Rossi: You know you haven't had a vacation in a while, weren't you talking about Italy?
Prentiss: My mother extended her trip there; it would not be much of a vacation.
Rossi: It's a big country.
Prentiss: Not big enough.
Prentiss: He is just a kid, can't be more than 25.
Morgan: A kid with an assault weapon isn't just a kid anymore.
Morgan: What happened? You pull a Whiskey Pete?
Prentiss: I don't know what that is, but if it involves getting puke on your boots, then yeah.
Prentiss: Journalist Dorothea Dix wrote, "Confession is always weakness. The grave soul keeps its own secrets, and takes its own punishment in silence."
Prentiss: Lao Tzu said, "When I let go of what I am, I become what I might be."
Original International Air Dates:
Czech Republic – June 19, 2012 on Prima family