White Walker (Valar Morghulis)

A White Walker is an minor character of White Walkers in the second season. He is played by guest star Ross Mullan and only appears in "Valar Morghulis."

Background
This White Walker is the one who leads the army of Wights.

Season 2
While Edd, Grenn and Sam, gathers flammable stuff in the snow, they hear three blast. Edd and Grenn run and forget about Sam. Sam hide behind a stone, when he saw a White Walker on horseback. He's looking on Sam and when ignores him. He leads the army of Wights further away.