Martha Kearney and her guests look ahead to two of 2014's major film releases - Mandela: Long Walk to Freedom, which stars Idris Elba as one of the 20th century's most important political icons, and Inside Llewyn Davis, the new film from the uncategorisable Coen Brothers, an homage to the New York folk scene of the early 1960s. They also review the National Theatre's adaptation of Erich Kastner's classic children's book Emil and the Detectives and the Serpentine Gallery's survey of the work of the provocative artistic siblings Jake and Dinos Chapman. Show less