In one scene, Jane says, "All this murder talk is rank; it stinks to heaven. It hath the primal eldest curse upon 't." He's quoting, imperfectly, from Hamlet, Act III, scene 3.
3x18 The Red Mile
Jane "There are zaidi things in heaven and earth, Horatio, than are dreamt of in your philosophy." He's quoting, from Shakespeare's Hamlet, Act I, Scene 5.