The episode title is from William Shakespeare's "Hamlet", Act 3, Scene 1: "Soft you now! / The fair Ophelia! Nymph, in thy orisons / Be all my sins remember'd." The previous episode title, This Mortal Coil (2007), comes from a phrase which occurs earlier in the same scene.
Amanda Tapping (Colonel Samantha Carter) and Mitch Pileggi (Colonel Steven Caldwell) played lovers in The X-Files (1993) Season 3's Avatar (1996).