"This is the most intense piece of filming I've done for 'Game of Thrones,' " actor Kit Harington declares about the Battle of Castle Black. The episode's velocity resonated with critics: Entertainment Weekly calls 'The Watchers on the Wall' "an intense rousing hour of heroism and heartbreak that set a new bar for what this show – and TV – can do."Read More
Sunday's episode is titled 'The Watchers on the Wall.' How up to speed are you on the ancient order? Test yourself on crow culture, tradition and happenings with the quiz below. Then tweet a screenshot of your results using #NightsWatchQuiz for a chance at swag.