This document summarizes a presentation on personality disorders and co-occurring disorders. It includes an agenda that covers reviewing a learning activity on personality disorders and DBT, an overview of personality disorders, the importance of differential diagnosis, dealing with ambivalence in treatment, and a preview of the next week's topic on integrating mental health into substance use disorder treatment. It also discusses common personality disorders from the DSM-5, interventions for working with clients who have ambivalence about change, and assigns a learning activity for the upcoming week.