Critics have already taken issue with how loosely "Reign" seems to be based on historical fact. Francis, for instance, is a robust womanizer in the show, as portrayed by Toby Regbo, when in fact he was physically fragile and sickly. Nostradamus, advisor to Francis' mother and author of the famous book of prophesy, is young and hunky in "Reign" instead of fiftysomething and spooky. And Francis' bastard brother, Sebastian, played by "Tudors" alum Torrance Coombs? He never existed.