Woo-hoo! The Simpsonsare coming. On St Patrick’s Day Homer and Grampa will come home in an episode being broadcast in Ireland ahead of its transmission in the US for the first time in the 20-year history of the show.

In The Name of the Grandfathersees Homer make Grampa’s dream of a final beer in a pub in the village of Dunkilderry come true.

Homer is prompted into the out-of-character act of kindness for Abe Simpson after forgetting to join him in the father and son three-legged race at Springfield Retirement Castle’s seniors’ sports day.

After a scolding by Marge, Homer takes Grampa across the water to O’Flanagan’s where he claims to have spent the best night of his life. On arrival, however, the village isn’t quite how he remembers it.

Father and son inevitably drink too much and end up buying the pub off Tom O’Flanagan, whose voice has been provided by Colm Meaney.

In news which will either be greeted with joy or horror by Fáilte Ireland, the pair also stop off at several Irish landmarks including the Giant’s Causeway, the Blarney Castle and, obviously, the Guinness Brewery.

To mark the broadcast, the executive producers of the show Al Jean and James L Brooks, along with Nancy Cartwright, the voice of Bart, will also travel to Ireland for an exclusive screening of the episode while Homer Simpson has been drafted into to edit the March edition of Sky Magazine.

Jean, Brooks and Cartwright are also scheduled to feature in Dublin’s St Patrick's Festival Parade and are expected to be on a Simpson’s float which is in the process of being hastily assembled.

The Simpsonsis the longest-running primetime animated series ever and the longest-running comedy series in television history. With countless awards to its name, the show has become legendary for its sharp humour and unparalleled celebrity guest list over the years.

The episode will be broadcast on Sky1 and Sky1 HD St Patrick’s Day, Tuesday 17th March at 7.30pm.