Thirty years after the creation of the first Secretary of State for Northern Ireland - considered the least desirable job in government - four former incumbents explain how their perceptions of the job, the people and the place were confounded or confirmed by their experiences.
Mo Mowlam was in charge of the delicate negotiations which eventually bore fruit with the signing of the Good Friday Agreement in 1998. Last of the series. Repeated on Sunday at 10.45pm