The author practiced psychiatry in a variety of settings on three continents. Engaging in private practice for 40 years, he retired in 2006. In the beginning of his career, despite his education, training, and qualifications, he was ignorant about DID/MPD. Through years of trial and error, he learned to recognize and treat patients with multiple personalities. It was a long and lonely journey of discovery. It is his hope that by sharing his clinical experience through this series, new generations of therapists will come to understand the importance of correctly diagnosing DID and treating it appropriately.