The concluding part of the BBC television documentary series Pandora's Box, A is for atom elucidates on the history of nuclear power in the US, Great Britain and the Soviet Union. The documentary covers the history of men’s harnessing of the atom as it began with the apocalyptic atom bomb, to later more peaceful uses of the same technology. The documentary consists of archival footage accompanied by narration and interviews with those who were involved in the respective scientific, political and economic administrations.