The scene where Lucy scans security camera footage and in a reflection sees the General giving JD a gun appears to be an homage to a very similar scene in Blade Runner where Deckard scans a photo to get a clue as to the identity of a renegade replicant.
Jeffrey Dean Morgan (JD Richter) & Hilarie Burton Morgan (Anna Schaefer) are married in real life and have one son together.
Jeffrey Dean Morgan (JD Richter) & Michael Gladis (Nate Malone) also worked together on episode 1.10, Lifeguard (2009), of The Good Wife (2009) as Jason Crouse & Mark Richardson respectively.