According to the Nice and Accurate Prophecies of Agnes Nutter -the world's only totally reliable guide to the future - the world will end on a Saturday. Next Saturday, in fact. Just after tea. Which means that Armageddon will happen on a Saturday night. There will be seas of fire, rains of fish, the moon turning to blood and the massed armies of Heaven and Hell will sort it outonce and for all. Which is a major problem for Crowley, Hell's most approachable demon and former serpent, and his opposite number and old friend Aziraphale, genuine angel and Soho bookshop owner.