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.

NARRATOR: In the castle Macbeth is put into his armour… FX: Clink of armour. MACBETH: You - tell my lady I am about to leave for battle. BODYGUARD: Yes, my lord. MACBETH: Are the flags flying?

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 ...