Actor John Michie takes to the road to explore Scottish icons that are celebrated the world over. In this edition, John designs his own tartan - and discovers a skeleton in his family closet. David Hayman visits Islay to sample the creme de la creme of malt whiskies. Lorraine Kelly is in her adopted home town of Dundee to find out just how inventive the City of Discovery is, and Sanjeev Kohli aims to uncover the secret of Scotland's other national drink at the Barr's factory in Cumbernauld.