This chapter explains the links between the Intersystem Approach (IA), attachment theory, and clinical practice. It begins by introducing the integration of attachment into the IA, using a new figure called the IA and the Intergenerational Transmission of Attachment. The chapter presents an introduction to the comprehensive methodology for developing therapeutic posture (TxP). Then, it explores the use of terms that exist to describe childhood attachment, adult attachment, and intergenerational family scripts. The chapter also presents a clear model for using these various terms to help clinicians in the comprehensive application of the IA. The IA with its particular emphasis on attachment patterns serves as the new theoretical foundation for the focused genograms (FGs). Finally, the chapter describes a number of FGs that provide a way to further explore particular issues and problems through the attachment construct.