BBC Radio 3's annual Free Thinking festival of ideas continues its summer of activity around the country. In the first of 2 programmes from Derry-Londonderry Matthew Sweet celebrates the city's status as City of Culture 2013 and explores its cultural past and present with a series of discussions, events and interviews recorded at The Playhouse. Writer Owen Hatherley, Derry-based architect Mary Kerrigan and local crime writer Brian McGilloway reflect on the architecture and landscape of Derry and the lives of its citizens.