Bill Clinton's visit to Northern Ireland marked the first time a sitting president visited the troubled province.
In reality, when Bill Clinton was scheduled to visit Northern Ireland, the show's writer and producer Lisa McGee once wrote a letter to Chelsea Clinton at the age of 13, hoping to make a new friend. In that letter, she invited Clinton to Derry. She never received a reply. McGee incorporated this experience, albeit slightly altered, into this episode.
During the taxi ride, you can see a mural of Annette McGavigan, a 14 year old girl who was fatally wounded by crossfire between British soldiers and the IRA in 1971
It is mentioned that Uncle Colm got to meet President Kennedy when he visited Ireland. This is likely a nod to Kevin McAleer who plays the character and has been writing a novel about JFK for at least ten years.