Nina announces that she will not be continuing with her therapy. The therapist is frustrated that history is repeating itself. Unable to understand what he is doing wrong, he reflects that he always selects his “victims” carefully, stalking them until he sees an opportunity to infiltrate their lives. Nina asserts that he is clearly not a qualified psychotherapist and is working toward his “own agenda” by suggesting she is unhappily married. The therapist argues that she cannot love her husband, as he has watched for months as a series of men have visited her. Nina laughs, pointing out that she sees an equal number of women.

Nina reveals that she realized he was a fraud by their third therapy session. For this reason, she did not give Tamsin his details. Having observed his behavior, she now realizes he has a personality disorder and is dangerous. The therapist leaves but returns that evening asking for the book she borrowed—Walden by Henry David Thoreau. He knows the book is in her bedroom, as he has seen it when he has prowled the house at night. He follows her up the stairs.