Equipped with space suits, golf clubs and a flag, the Doctor and Rose are planning to live it up, Apollo mission-style, on the Moon. But the TARDIS has other plans, landing them instead in a village on the south coast of England; a picture-postcard sort of place where nothing much happens. Until now...

An archaeological dig has turned up a Roman mosaic, circa AD 70, depicting mythical scenes, grapes and a Dalek. A few days later a young woman, rushing for work, is knocked over and killed by a bus, then comes back to life.

It's not long before all hell breaks loose, and the Doctor and Rose must use all their courage and cunning against an alien enemy and a not-quite-alien accomplice who are intent on destroying humanity.