We first met the Lord of Bones (also called Rattleshirt) in season two after Jon was captured by the Wildlings. Later, in season three, the Lord of Bones presented Jon to Mance Rayder, the King Beyond the Wall. During this second meeting, the character took off his skull mask for the first time and we got to see his face briefly. At this point, the character was played by Edward Dogliani. Later, in season five, when Tormund and the Lord of Bones meet again at Hardhome, Dogliani had been replaced by actor Ross O’Hennessy. O’Hennessy is best known for playing Commander Quattrone on Da Vinci’s Demons. In this sequence, the Lord of Bones’ only function was to piss Tormund off and die. O’Hennessy totally nailed it.