Oz and James cross the Irish Sea to Dublin in search of the best drinks of modern Ireland. Having had enough of whisky in Scotland, they decide to concentrate on Irish beer. Things take a turn for the worse when they order their first pint of 'the black stuff' and Oz claims that he knows all about the Irish drinking culture because he is, of course, Irish himself. But before they get into an argument about his claim, the pair head to a Dublin landmark, the Guinness brewery. The problem is this is one drink that James really does not like. Oz thinks he knows the way to the famous brewery, but they get lost and end up in a tunnel. James challenges Oz to tell him the concise history of stout and porter in the time it takes to walk through the tunnel. Oz and James then meet brew master Fergal Murray, who teaches a wary James how to sink a pint in true Irish fashion.