Philip Dodd talks to historian Orlando Figes about the new exhibition of Masterpieces from Russian Museums at the Royal Academy in London, the subject of recent diplomatic tension between London and Moscow. On the eve of the World Economic Forum in Davos, the programme asks whether attempts by world leaders to use YouTube to explain policy are merely a gimmick. Pyschoanalyst Darian Leader and art historian Griselda Pollock discuss the place of mourning and grief in contemporary culture. Plus a review of the new Royal Court production of The Vertical Hour, David Hare's play about the Iraq War.