Dunsinane Castle. Lady Macbeth is reading a letter from her husband. Her ambition for Macbeth is clear, but so too her concern that he is not sufficiently ruthless to take matters into his own hands.

Lady Macbeth: 'Be innocent of the knowledge dearest chuck', what knowledge is there now that I can be innocent of? Innocent, the eyes of one who sees the corpse of a king, smoothly hacked at like a ...

DOCTOR: And you think she’s asleep each time? SERVANT: I’m sure of it. She says things - but look! Here she comes! Watch! DOCTOR: Her eyes are open! SERVANT: But they do not see. DOCTOR: What’s she ...