Brynden “The Blackfish” Tully: The Blackfish (Clive Russell) makes his debut in Season Three. He is Catelyn Stark’s uncle and a skilled knight of House Tully. He provides invaluable support to Robb Stark as an adviser and captain of the outriders. Back Story:Brynden is the younger brother by five years to Lord Hoster Tully. He proved his bravery and fighting skill in a series of wars and is now renowned and feared throughout the Seven Kingdoms. He’s also just and honest.