Beckett: Not only was he there, but someone tried to kill him as well. Good thing he reads.
Ryan: Good thing he reads Russian literature. The guy was a Nicolas Sparks fan, he'd be dead.

Jeremy: An ex-wife that I can't remember.
Castle: Hey. Some men would consider you lucky.

Martha: And I'm scared. I mean, what if it doesn't work out? What if it does?
Castle: That's the cost of living...

Castle: Suppose the flea had a gun, a tiny gun with vanishing bullets
Becket: Ice bullets and fleas with guns, do you have writers block again.
Castle: Steven King wrote stories of blood thirsty cars and sold millions of copies, I figured why be limited by logic.

Richard: Why, Detective Beckett, I had no idea you were a romantic.
Kate: I also sleep with a gun. Bet you didn’t know that either.

Ryan: Good thing he reads Russian literature. The guy was a Nicolas Sparks fan, he'd be dead...

Nicholas Sparks is an internationally known bestselling author. At the time of this airing, he had had four of his books made into feature films. His novels typically run about a fourth the page count of War and Peace.

Castle: Ms. Westchester, do you have cats?
Tory Westchester: Eight. Like Jon and Kate.

Jon & Kate Plus Eight was a briefly popular reality show about the Gosselin family, consisting of parents Jon and Kate and their eight children - a pair of fraternal twins and sextuplets.

Central to this episode is the notion of amnesia. The doctor seems to take Jeremy's amnesia in stride as though not unsurprising. In actuality, he's likely to either disbelieve the claim or be fascinated by the case, and want to study it, since real, diagnosable amnesia – people getting knocked on the head and forgetting their names – is mostly just a rumor in the world. It's a rare condition, and usually a brief one.