The utilization of the ex-addict as a member of the therapeutic team in the treatment and rehabilitation of narcotics addicts is a relatively new development. In the following article, the authors attempt to evaluate the ex-addict's potential for success in this new role and how he is affected and affects the other members of the therapeutic team, particularly the psychiatric clinical nurse specialist. A description of the ex-addict's role is given, as well as the way in which he is utilized in New York City's Addiction Rehabilitation Program coordinated by Dr. Efren Ramirez. The central thesis is that there are certain functions which the ex-addict can perform more effectively than the professional. However, professional members of the team must recognize and accept the ex-addict if he is to successfully aid in treatment and rehabilitation.