Here's the difference between White Walkers and wights on 'Game of Thrones'

HBO Warning: Spoilers ahead for "Game of Thrones." "Game of Thrones" has delivered several horrifying scenes of the Night King and his White Walker captains waging battles against men (usually with Jon Snow in their midst). In the latest showdown, the Night King surrounded Jon and his companions in "Beyond the Wall," and we watched as a flurry of wights were killed by the small group of men. But one thing that might not be clear to all show-only fans is the difference between the White Walkers a...