The Tardis lands in a forbidding castle in a time of religious upheaval. The old god has been overthrown, and all heretics are to be slaughtered. Obviously it isn't the sort of thing which would happen there every day - just every few years or so. And when the Doctor and Frobisher are hailed as messengers from heaven, they quickly become vital to opposing factions in their struggle for power. But will they be merely the acolytes of the new order - or will they be made gods themselves?
"Down the Rabbit hole."
Luther battles against the Disruptors in a parallel world where many things are familiar - but nothing is the same. The alternative England where Luther fights the Disruptors did not see the monarchy restored after the English Civil War and has been under the rule of the Puritan Parliamentarians for hundreds of years. Led by a direct descendant of Oliver Cromwell, England is ripe for the taking by European superpowers that are preparing to invade.