Documentaries play a significant role in shaping public understandings of genocide and are the most common film genre on the subject. Yet, film scholarship has typically taken a narrow approach to depictions of genocide, reading atrocities separately, analysing only a small subset of often well-known films, focusing on the depiction of victims only, and paying little attention to the production context. By contrast, my project is a wide-ranging comparative study that analyses how numerous genocides and their perpetrators have been presented in documentary film. Spanning seven 20th-century genocides across three continents and combining interviews with filmmakers, distant reading methods, content analysis, and historical research, my project tracks the multifaceted representational strategies of over 200 films, addressing both the local and global contexts impacting their production. I highlight and critique dominant trends in documentary representation, proposing a broader and methodologically innovative approach to studying the depiction of atrocities that provides an encompassing framework for understanding genocide documentaries and their discursive and socio-political impact.