Martin and Paul head north to Co. Louth's Cooley Peninsula and the medieval town of Carlingford. They're challenged by Queen Maeve's army on the hunt for the Brown Bull of Cooley so Paul takes inspiration and decides beef is his turf ingredient. He's determined to win this challenge but cannot make up his mind which cut of beef to cook. Martin opts for the famous Carlingford oyster but can it beat the best of Irish beef?