In a series that's been full of mythical beings, prophetic dreams, wights, and dragons, this week's episode of Game of Thrones tipped the balance more firmly into the supernatural camp, giving us to date possibly the most visceral (and disturbing) reminder that magic is slowly creeping back into the Seven Kingdoms Westeros. Our reaction to that as viewers takes two directions: one is excitement, the other is dread. Some have convinced themselves that this isn't a fantasy series, and that's perhaps the wrong approach. While Game of Thrones is certainly populist fare, it's rooted in the fantasy genre and its slow integration of supernatural elements is to be applauded, though they were part and parcel of the series from the very first scene. The White Walkers have always posed a threat to the Seven Kingdoms and therefore to the realm of man. Whatever happened thousands of years earlier to drive the White Walkers beyond the Wall and also end the reign of the Childr