Kirsty Wark and guests Paul Morley, Aminatta Forna and Professor Sarah Churchwell review Kenneth Branagh's performance as Macbeth at the Manchester International Festival; Oscar-winning filmmaker Alex Gibney's documentary We Steal Secrets: The Story of WikiLeaks; the first major London exhibition of paintings by LS Lowry in over 30 years; and new comedy series from Christopher Guest and Graham Linehan. Plus, music from The xx. Show less