Behavioral Couples Therapy (BCT) is an evidence-based approach , also known as Integrative Behavioral Couples Therapy, or Behavioral Marital Therapy. BCT is designed for married or cohabiting individuals seeking help for alcoholism or drug misuse. BCT sees the substance using patient together with the spouse or live-in partner. Its purposes are to build support for abstinence and to improve relationship functioning.
► Here's the wikipedia entry on BCT