Oberyn Martell enters the fray in season 4. Also known as the Red Viper he is Dornish Prince who comes to King’s Landing as part of the deal struck by Tyrion in Season 2 which saw Princess Myrcella dispatched to Dorne, ostensibly to keep her safe from the oncoming war. In the books Oberyn arrives in Kings Landing to join Joffrey’s Small Council as part of that deal.
“This was a tough one,” say showrunners David Benioff and Dan Weiss about the casting. “The Red Viper is sexy and charming, yet believably dangerous; intensely likable, yet driven by hate. The boys love him, the girls love him, and he loves them all back. Unless your last name is Lannister. We found a fellow who can handle the job description and make it seem effortless. He wasn’t easy to find and he won’t be easy to stop.”
Pedro Pascal is a chilean actor with a host of television and movies credits to his name. You may recognise him most recently from the Adjustment Bureau.