Summerton Mill (2005)

When it rains up at the hill, the ruined watermill starts to turn and a little bit of magic takes place, and, for a little while, the Summerton Mill returns to its original state, complete with its former inhabitants Dan, Dr. Naybhur and Mrs. Naybhur. A the end of the episode, the watermill slows down, and Summerton Mill returns to its present state.