Hal-Con 2013

Throughout the series, each of the Doctor's incarnations has had a different personality and, therefore, a different opinion on how steadfast or flexible his moral guidelines are. The most recent series' have put the Doctor up against some of his toughest challenges and pushed the limits of his mercy. But how merciful is he really?

Showrunner Steven Moffat has been making a point of showing us how the Doctor's legend is not always that of a hero. His past is mysterious and blood-soaked; he spends his whole life running from it, doing everything he can to avoid having to look back. The revelation of a hidden incarnation of the Doctor--a "dark" Doctor--proves that he has more skeletons in his closet than he is willing to admit.