The Emerald Diamond is a documentary following the history of Baseball Ireland and the Irish national baseball team directed by John Fitzgerald and starring Chris Foy. It was released in 2006.Director John Fitzgerald financed the film almost entirely on credit cards while working freelance at various jobs in the TV and film industries. The film crew was made up of professionals from in and around Fitzgerald's hometown of Valhalla, NY, with each crew member coincidentally living in towns along the Metro North Railroad's Harlem Line – leading to the creation of Harlem Line Pictures and, later, Harlem Line Media.