The Oscar-winning writer and producer Aaron Sorkin, acclaimed for The Social Network and The West Wing, talks to Kirsty Lang as the final season of The Newsroom airs. Kirsty visits Leighton House in London as paintings from The Pérez Simón Collection, the largest private collection of Victorian art outside the UK, go on display there, including some significant works by Lord Frederick Leighton now returning to the house where they were painted. We speak to Ali Smith, author of How to be Both, the winner of the Goldsmiths Prize 2014. And crime writer Dreda Say Mitchell joins Kirsty to talk about her new thriller, Vendetta - which features an undercover cop who falls in love with one of the members of the criminal gang that he has infiltrated.