TV

Arrow
1x17 The Huntress Returns

Game of Thrones
2x09 Blackwater
This episode has been hyped since I-don't-know-when; certainly, long before season two even began airing. But it lives up to all expectations, because it's phenomenal. The action is quite incredible, but also the drama within the city's walls. It's a shame it cost them so much (a bonus on top of the season's regular budget) that we're not likely to see it repeated, because they can clearly pull off a battle incredibly well given the money.