"And flights of angels sing thee to thy rest." -Hamlet
From William Shakespeare's famous Jacobean tragedy Hamlet. The story chronicles Prince Hamlet's pursuit for revenge unto his uncle Claudius for the murder of his father, the King. Arguably the most notable words from the text are the infamous: "to be, or not to be, that is the question," uttered by Hamlet at the start of a soliloquy in the first folio text edition circa 1623, but every line carries substantial significance. "Goodnight, sweet prince, And flight of angels sing thee to thy rest," appears towards the end of the text and is uttered by Horatio right after Hamlet's death.
"O, from this time forth, my thoughts be bloody or be nothing worth." -Hamlet
The literal meaning of this line, said by an emotional and angry Hamlet at the end of act 4, scene 4, was that any thoughts of his that were non-violent would, going forward, now be considered worthless. There are more similarities between Hamlet and "Cry Havoc" than there were in "Goodnight, Sweet Grimm" due to the revenge Nick seeks for the murder of his mother and his state of mind throughout the episode being quite similar to that of Hamlet's in this scene, though it is the Royals that are in Nick's crosshairs.