Mentoring across educational and training programs that prepare behavioral health care providers and related professionals is a critical topic and one that has been relatively neglected empirically. Articles in this special issue summarize extant literature on mentoring across several levels and contexts: undergraduate education, master's level training, doctoral training (both PhD and PsyD), and internship and postdoctoral training. This introductory paper provides an overview of each contribution to the special issue, discusses the intended audience, and presents the issue as part of what should be an ongoing dialogue about best practices in mentoring. Overall, the special issue aims to raise and begin to address a number of significant questions related to where we are going as a field, who is equipped to move us in that direction, and how to mentor the next generations of those who will serve a variety of "clients." Keywords: mentoring; supervision; training; doctoral; master's-level; education "A discipline which critically looks at the evidence for practice should itself be critically examined" (Nabulsi et al., 2007, p. 468). Nabulsi and colleagues review evidence for the impact of education in evidence-based health care (EBHC) on learner, patient, and health system outcomes. This review clearly concludes that existing data is limited and of generally poor quality. The literature on the impact of training methods in psychology (in evidence- based practice and more generally) is similarly sparse (McFall, 2006; Sholomskas et al., 2005; see Rakovshik & McManus, 2010 for a notable exception). As those trained from within scientist-practitioner, practitioner-scholar, and/or clinical science models, we as psychologists engaged in training know well the value of subjecting our clinical methods to empirical scrutiny and actively consuming the research that others within and outside of the field put forth. Yet, if we were to rely as heavily on evidence-based practice in our roles as clinical supervisors, research mentors, and course instructors, we would not get very far! Given that training clearly involves planting and tending to the seeds of tomorrow's professionals, it seems imperative that we at least actively "sit with" questions about why this is the case and consider some attempts to move forward in addressing this neglected set of topics. In his address upon receipt of the APA Award for Distinguished Career Contributions to Education and Training in Psychology, Rex Forehand (2008) speaks of the "art and science of mentoring in Psychology" and aptly summarizes the sparse literature on this topic. Forehand's article is an inspiring call for greater attention to the mentoring process. It is limited for our purposes, however, by its focus on "producing the next generation of scholars" (p. 744); this review clearly pertains to practices related to training students in PhD programs poised for positions in academic institutions. Although much of the literature that Forehand presents may be relevant to working with trainees with more diverse aspirations, this in and of itself involves a host of empirical questions. Furthermore, with the growth of PsyD programs with various emphases, the reality that master's-level practitioners currently provide a high percentage of psychotherapeutic services, and the fact that training in ways of thinking about evidence-based practice can begin during undergraduate years and span through internship and postdoctoral training (and beyond; see Kazdin, 2008), it seems that exploration of these topics by individuals who are involved in training across various types of programs and levels of training is warranted. Mentoring: A Privilege and Responsibility Williams-Nickelson (2009) offers a definition of mentoring that is useful for our purposes. It emphasizes a mentor as an individual who is in the mentee's chosen profession, who actively works to integrate that person into a professional role, and who feels a sense of responsibility for the development of the mentee's career. …