There's a murder at an abandoned house (with the same MO as two earlier murders in the same house), and Nick and Hank talk to Mark Wilson, the detective who investigated the original case. He explains that he thought it was a love triangle. "During the investigation, we learned Patty Donovan was having an affair with her husband's co-worker, Theo Hinkley. Well, Theo probably thought Patty was gonna leave Stetson for him. But Patty decided not to, so, Theo figured if he couldn't have her, no one could." And then he says, "Shakespearean, ain't it?"
I'm not sure how much stock I would put in his "Shakespearean" assessment, but what I thought interesting about that line is that isn't not the only Shakespeare reference in the episode. Or at least I don't think so.
Two scenes later, Nick gets into bed with Juliette and asks her, "What are you reading?" To which she replies, "A book."
That same literal answer is in Shakespeare's Hamlet. In Act II, Scene II, Polonius asks Hamlet, "What do you read, my lord?" and Hamlet replies, "Word, words, words." (II.ii.209-210).
There doesn't seem to be much in-show significance, but I think it illustrates that the writers were indeed thinking of Shakespeare.
The new thing I noticed in re-watching it recently is that the same effect from "Wesenrein" (S4E9) returns. At the end of this episode, when Juliette goes to visit Henrietta, her face is multiplied as the camera looks through a pane of glass with bevels at the edges:
As it did in "Wesenrein," it indicates how Juliette is starting to splinter between her normal self and her new hexenbiest self.
