https://www.yahoo.com/movies/m/d8372210-b5a9-393a-a86c-834fcc899c7b/ss_doctor-who%3A-the-genius-of.html

Warning: contains spoilers for The Doctor Falls. Russell T. Davies, for all his many virtues as Doctor Who showrunner, was pretty relaxed when it came to continuity. In his own time he had as intricate and complex a headcanon as the next fan, including some pretty elaborate theories on w