Few phenomena have polarized the psychotherapy profession like multiple personality disorder. This program examines the history of this controversial condition, as proponents and critics alike address topics including brain anatomy, dissociation, coercion, memory implantation, allegations of satanic ritual abuse, and Sybil—both the movie and the person. In addition, Paul McHugh, of Johns Hopkins University; James Chu, of Harvard Medical School; psychiatrists Colin Ross and Herbert Spiegel; social psychologist Richard Ofshe; and others square off on the subject of whether MPD is really a socially created artifact—and if so, is therapy the cause? A Discovery Channel Production. (52 minutes)