Stephen King’s The Dark Half follows the conflict between Thad Beaumont and his alter-ego, George Stark, who has come alive from Thad’s imagination. They are mentally connected; however, physically they are opposites except for fingerprints and voice patterns. This makes it easy to categorise Thad as suffering from Multiple Personality Disorder, also called Dissociative Identity Disorder (DID), since Stark is another personality of Thad’s. The parallel of the two characters and the imagery of twins throughout the novel highlights themes of Multiple Personality Disorder. The text explores how Thad responds to the mental illness through the tension between him and Stark, as well as the inability to co-exist together – only one is consistently