Pedro Pascal played the character Oberyn Martell, also known as the Red Viper, in the fourth season of the HBO series Game of Thrones (2014)
. Oberyn Martell is the younger brother of Doran Martell, the Prince of Dorne, and is known for his quick wit, keen intellect, and skilled combat abilities
. He comes to King's Landing to attend the wedding of Prince Joffrey and seeks revenge against the Lannisters for the murder of his sister Elia Martell and her children
. Oberyn volunteers to fight as Tyrion Lannister's champion in a trial by combat against Gregor Clegane (The Mountain), where he initially gains the upper hand but is ultimately killed in a brutal fight
. Pascal's portrayal of Oberyn Martell received critical acclaim and was a breakout role that significantly boosted his career