Tonight is the final episode of this compelling music documentary which has taken a look back down to the roots of our musical culture. Presenter Mairead Ni Mhaonaigh will be examining the Irish tradition of keening - a form of vocal lament associated with mourning. She looks at whether or not it still resonates in today's music or if this bluesy part of our past is at risk of being forgotten. Plenty of great contributions tonight too including Declan O'Rourke, Muireann Nic Amhlaoibh, Maria Doyle Kennedy, Susan McKeown and the Voice Squad.