This chapter develops a conception of necropolitics as a power/knowledge assemblage by focusing on the games of truth and regimes of knowledge produced around death in the cases of mass graves and disappearance in Turkey. In particular, I am interested in the relations drawn between death, memory, and knowledge in necropolitical spaces, in spaces where life and the living are subsumed under the active production, regulation, and optimisation of death. The chapter consists of three parts: the first part analyses the relation between necropolitics and knowledge production, in order to establish necropolitics not only as a political technology, but also an epistemic one. The second section investigates the specific techniques of knowledge deployed in necropolitics, i.e., necro-epistemic methods, which target the temporal and logical coherence of memory in necropolitical spaces. The last section focuses on the practices of epistemic resistance, which work through mobilising perplexing realities in order to instigate counter-discourses. Overall, I argue that these counter-discourses, which I call ‘nightmare-knowledges,’ constitute necropolitical spaces as spaces of epistemic agency.