Back at Dunsinane, a doctor and a gentlewoman are spying on Lady Macbeth. She’s been acting weird lately. Sure enough, she enters the scene sleepwalking and talking to herself. While the doctor and the gentlewoman look on, Lady Macbeth frantically tries to rub an invisible stain from her hand, all while ranting and raving about her husband, guilt, and, of course, blood. At this, the doctor and the gentlewoman realize that Lady Macbeth has been keeping some pretty evil secrets, and that’s not something the doctor can help her with. She needs a priest, not a medical professional.