The first feature film made about the design and deployment of the atomic bomb, The Beginning or the End (1947), begins with fake newsreel footage depicting the burial in a time capsule of a copy of the film and a projector to show it on. The scene, with its funereal overtones yet grim optimism that, even in the face of catastrophic destruction, the germ of civilisation will endure, recalls the ceremonies surrounding the interment of the Westinghouse time capsule at the New York World's Fair in 1939. Time capsules, this article argues, stand in a complex relation to war and temporality, seeking to at once anticipate and work through the challenge posed to futurity by the threat of global conflict. As a container, the capsule attempts to de...