Rose Weasley is stuck in Fred's World and the Doctor knows that getting her back is impossible. But then again, doesn't the universe just love to prove him wrong? Meanwhile, in her parallel universe, trouble is brewing for Rose on the other side of the wall. (Sequel to Clarke's Third Law.)

Muggles say that any sufficiently advanced technology is indistinguishable from magic. Rose Weasley would beg to differ. So what happens when this witch meets the last of the Time Lords? Things become a tad confusing and more than a bit fantastic (AU snapshots of series 1 and 2).