Nursing research has focused on evaluating the effectiveness of clinical supervision, but there remains uncertainty as to what facets of clinical supervision are potent in realising effectiveness.This book reports on an investigation on the practice of clinical supervision in mental health nursing. Incorporating three case studies, it illuminates the reciprocal interactions between clinical supervisor and supervisee. While the book uncovers a number of limitations in the process of clinical supervision and gaps in mental health nurses’ level of competence in interpersonal relations it provides a basis for a more critical approach to this important element of professional development.