I have a bit of a question, actually- in re. things going back to how they were after Donna actually does turn left. Specifically, I'm thinking of Lucy. Just because, during the time this would be occurring, if things go accordingly, Lucy will be being kept in a cage on an island, tortured and fed fish biscuits. Obviously, if she'd never met the Master, this would never have occurred, so in the alt!verse week, she'd go back to being a nobody editor at some London publishing firm. When the week is over, then, would she then go back to being on the island, just as if no time had passed?