Oberyn Martell is a major character in the fourth season. He is portrayed by Pedro Pascal and first appears in "Two Swords". He's a member of House Martell, the ruling family of Dorne. Oberyn is well known for his fighting skills, passionate temper, and sexual appetites. Prince Oberyn, known as the Red Viper of Dorne, is the younger brother of Doran Martell, the Prince of Dorne, and the late Elia Martell, wife of Rhaegar Targaryen, the late Prince of Dragonstone and heir to the Iron Throne. Traveling to King's Landing to attend Joffrey's royal wedding in his brother's place, Oberyn's real motive is to seek revenge for the murder and rape of his sister by Tywin's bannerman, Gregor Clegane. Oberyn gets an opportunity to kill Clegane when he volunteers to champion Tyrion Lannister in a trial by combat; although he manages to severely wound and poison Clegane, he is ultimately killed.