In this paper I briefly outline sources of understanding transformative human relationships, including quantitative and qualitative research and ethics. I present an argument for drama as another useful source of understanding such relationships. I then explore Rogers' (1959) necessary and sufficient conditions of therapeutic personality change (the core conditions) vis-a-vis the television series Buffy the Vampire Slqyer. I present scenes from Buffy the Vampire Slayer as case studies, and analyse them to reveal what can happen when the core conditions break down or are not present in a transformative relationship. I also use material from these scenes to demonstrate the transformative power of the core conditions when they are fully present.