Box falls out of the sky. Man falls out of box. The is in no fit state to save the world today. He's only just regenerated. His sonic screwdriver is bust. The Tardis has crashed and burned, and lies wrecked in someone's back garden... But an alien convict have escaped. Planet Earth is in terrible danger. The patients on the coma ward of the local hospital in Leadworth, near Gloucester, have been seen wandering the village - how is that possible? And what's with that strange crack in the wall, curving like a crooked smile, and the distant, echoing voice coming from within?