Outside of the Night King, there is one White Walker that everyone recognizes. Though he is often confused with the walker that Jon Snow fights and kills at Hardhome, this particular walker is the one seen on horseback with the ice spear early on. He’s appeared in several episodes between season two and season four and he appears to be a lieutenant or commander of some sort. The actor underneath all that makeup and prosthetics is Ross Mullan, a man that is no stranger to wearing masks in film and on TV. He’s portrayed a Stygian witch in Clash of the Titans, a werewolf in Howl, voiced Neville on Bear Behaving Badly, and has played a few characters on Doctor Who, including the Teller and, perhaps most famously, the Silence.