Prince Doran Martell is a recurring character in the fifth and sixth seasons, although he had already been mentioned in the second and fourth seasons. He is portrayed by Alexander Siddig, and debuts in "The House of Black and White." Doran Martell is the head of House Martell, the ruling Prince of Dorne, and the Lord of Sunspear. He is the older brother of Elia and Oberyn Martell, and the father of Trystane Martell. He was murdered along with his heir, Trystane, by Ellaria Sand and the Sand Snakes in an act of retaliation for his inaction against House Lannister for their crimes against Dorne.