This paper presents a case study that aims to further our understanding of the relational and embodied aspects of the psychotherapy process. One psychoanalytic session is examined on multiple levels, including talk, participants' physiological arousal and interactional attunement, ruptures in the therapeutic alliance, postural congruence and facial expression of affect. Implicit processes of non-verbal attunement seem to play a role in resolving ruptures and in fostering exploration and the creation of new meanings. Embodied attunement was found to be at its highest at points in the session characterized by verbal disjunction and ruptures in the therapeutic alliance. The therapeutic dyad was 'in sync' non-verbally until tension was resolved, at which point, synchrony was relaxed, and therapist and client were able to proceed with their respective 'tasks', secure in the knowledge that the other is there for them. It is argued that attempts to describe the complex and nuanced processes of psychotherapeutic change would benefit from attending to both explicit/semantic and implicit/non-verbal domains of interaction. This paper is based on a presentation at the 'Peripheral Visions' conference organized to celebrate the work of Jeremy Holmes. The word periphery in its original Greek «περιφέρεια» denotes that which is at the margins rather than the centre; also, it refers to the circumference of a circle or any curved line that encloses a circular shape, with associations with space, boundaries and form. In line with the spirit of the conference, this paper explores that which lies on the periphery of conscious awareness, but which arguably is central to the process of therapy.Despite the proliferation of theories of change in psychotherapy, there is relatively little in-session research that explores in detail the processes through which change takes place. In this paper, we present findings from an exploratory, mixedmethods case study, which aims to describe aspects of therapy process by examining the minutiae, and from multiple perspectives, a brief interactive event from one session of a psychoanalytic treatment.