Behavioral Couples Therapy for Substance Abuse (BCT) is a family-based treatment approach for substance- and alcohol-abusing couples and their families. The assumption underlying BCT is that therapeutic interventions that are designed to address substance abuse problems while concurrently dealing with a patient’s family and relationship issues may provide a significant benefit because family and relationship factors appear to play a critical role in a patient’s abstinence from substance abuse and relapse after treatment. Involvement of intimate partners in the therapeutic process could increase the success of treatment and reduce the risk of relapse.