The Conversational Model of Therapy, which is also known as Psychodynamic-Interpersonal Therapy is an evidence-based psychological treatment. The model has a set of distinctive therapist behaviours, which can be taught and learnt in a short space of time. Although the model can be practised without an appreciation of the theory which underpins it, the theoretical basis of the model is rooted in psychodynamic ideas, and it shares many common theoretical approaches with other psychodynamic models. In this article, we describe the theoretical underpinnings of the model, include a description of basic model behaviours, an explanation of why these behaviours are important, and how they directly relate to and are derived from the theoretical stance. We also provide a case example, and show why the model can be practised without detailed theoretical knowledge to good effect, if its common guiding principles are followed.