This is the first episode to feature Castle and Beckett's "shared brain" - when, while running a theory, they reach a conclusion together and say it out loud simultaneously.
In "Flowers for Your Grave (2009)", it's mentioned that one of Castle's novels is titled "Hell Hath No Fury". Compared to the success of his Derrick Storm series, he considers it one of his 'lesser' works, and believes only 'hardcore' fans of his would have read it.
Castle's phone number is 347-555-0179. While the "555" prefix is fictional, the 347 area code covers the Marble Hill section of Manhattan, in addition to the other four boroughs. Since Castle is a Manhattanite, he either lives in Marble Hill or purchased his phone there.
Although the title may seem to be derived from a well-known quotation ("Hell hath no fury like a woman scorned"), that is a misquote. The original line is from William Congreve's 1697 play "The Mourning Bride", act iii, scene 8: "Heaven has no rage like love to hatred turned, nor hell a fury like a woman scorned."* In order for the title to have adhered to the original form of the quote, it should have been "Nor Hell A Fury".
"The Mourning Bride" is the source of another famous misquote; "Musick has Charms to sooth a savage Breast, To soften Rocks, or bend a knotted Oak. I've read, that things inanimate have mov'd, And, as with living Souls, have been form'd by Magick Numbers and persuasive Sound." the line appears in act i scene 1. (*In its original form, the quote is "Heav'n has no Rage, like Love to Hatred turn'd, Nor Hell a Fury, like a Woman scorn'd")
Martha states that Harper Lee only wrote one book (To Kill A Mockingbird 1960). While this was sort of true at the time (2009), it sort of wasn't. Harper Lee published "Go Set A Watchman" in 2015 a sequel to "To Kill A Mockingbird". However "To Kill A Mockingbird" began its life as "Go Set A Watchman" in the 50s, and after many rewrites it became Mockingbird, so it could be argued it was still only one book, despite being set in two different eras with the main character as a child and as an adult.