Plot: Mark Kermode interviews film director Nick Roeg, who turns 80 in August, and whose new film Puffball, based on the novel by Fay Weldon , has so far been panned by critics in advance of its release next month. Plus Peep Show writers Sam Bain and Jesse Armstrong discuss their influences, and Tim Samuels saturates the village of Comrie in Perthshire with hundreds of copies of the novels shortlisted for the coveted title Best of the Booker, due to be announced on 10 July