In the Name of the Grandfather

S20, E14: The Simpsons let Grampa down and agree to do one thing he's always wanted. They fly to Ireland to visit a pub Grampa loved as a young man, and wind up buying it, only to find that the Irish no longer want to hang out in pubs. The Simpsons bring Moe over to give them advice, and he suggests they allow smoking in the pub, which runs them afoul of Irish law. Featuring the guest voices of Colm Meaney and the stars of "Once."