In the Name of the Grandfather - S20.E14

The Simpsons travel to Ireland so that Grampa can have a final drink at O'Flanagan's Pub - an old watering hole of his. But when the small town of Dunkilderry isn't quite what Grampa remembers it as, and O'Flanagans has become a rundown and empty pub, he and Homer decide to buy it and fix it up.