Television before TV rethinks the history of interwar television by exploring the medium’s numerous demonstrations organized at national fairs and international exhibitions in the late 1920s and 1930s. Building upon extensive archival research in Britain, Germany, and the United States, I analyse the sites where the new medium met its first audiences. I argue that public displays were central to television’s social construction; for the historian, the exhibitions therefore constitute crucial events to understand not only the medium’s pre-war emergence, but also its subsequent domestication in the post-war years. Designed as a transnational study, my book highlights the multiple circulations of artefacts and ideas across borders of democratic and totalitarian regimes alike. Richly illustrated with 100 photographs, I emphasize that even without regular programmes, interwar television was widely seen.