Mack makes a drastic decision when he realises that his infidelity has shattered his marriage with Dee. Hurt and distraught that their marriage could be over, Dee falls into the arms of Turlough! Máire and Pádraig's advice gives a disheartened Laoise the confidence to realise that she deserves to be someone's number one. She resolves to put Colm in his place and give him a taste of his own medicine! Gráinne and David are keen to stay involved in making Séamus Mhicil Tom's poitín, but Tadhg concocts a crafty plan to make them feel that they're not up to the task!