This article offers an overview of the expanding field of couple therapy, focusing on what the author considers to be new and even revolutionary in this field. In terms of outcome research, this article suggests that differential treatment effects are discernable. Emotionally focused therapy (EFT) appears to demonstrate the best outcomes at present. The most significant differences between research studies and everyday clinical practice may be the levels of therapist supervision rather than the essential nature of clients. The manualization of treatment is also viewed positively in this review. Areas of growth are the mapping of the territory of distress, understanding the process of change, couple therapy as an effective intervention for “individual” disorders, and the integration into couple therapy of clinical research, such as the research on gender and responses in therapy, and research on adult attachment. Practitioner-scientists can contribute to this evolving field by systematic observation and by reminding researchers of the need for clinical relevance. Couple therapy is now integrating description, prediction and explanation. As a result, theory, practice and systematic investigation are beginning to create a coherent whole.