This chapter presents the main features of voice-over and off-screen dubbing in relation to non-fictional genres, from traditional documentaries to factual television. It first proposes a definition and categorization of voice-over and off-screen dubbing, and then reports on the main research approaches to the topic, including cultural and linguistic aspects, translation and synchronization techniques, ideology and manipulation, and the role of technology. Didactic implications are also considered before closing the article with a summary of possible future research.