Game of Thrones Season 5, Episode 8 -- a.k.a. "Hardhome" -- gave viewers one of the most epic, spine-chilling battles of the show's run.
Jon Snow and Longclaw were the scene's heroes, managing a close escape from the wights and White Walkers. But the real work was done behind the scenes by the special effects gurus at El Ranchito Imagen Digital. In this clip, they document the meticulous process of green screens and VFX that went into raising an army of undead -- and this dude: