Only God Forgives; Nicola Benedetti; Walter De Maria; Mass Observation

With John Wilson.Ryan Gosling and Danish director Nicolas Winding Refn (Drive, Pusher) team up again for the crime thriller Only God Forgives. Set in the Bangkok underworld, the film has divided critics with its use of violence and an unconventional narrative structure, and even Gosling has admitted the film could alienate audiences. Crime writer Dreda Say Mitchell gives her verdict.Violinist Nicola Benedetti nominates a favourite concerto for Cultural Exchange, in which leading creative minds share an artistic passion.Sculptor Antony Gormley pays tribute to fellow artist Walter De Maria, who has died at the age of 77. Walter De Maria's most renowned work is The Lightning Field, in which he placed 400 stainless steel poles in a vast grid in a remote area of New Mexico. Antony Gormley share his memories of De Maria, who became a reclusive figure, and was rarely photographed or interviewed - although he performed as a musician alongside Lou Reed and John Cale in New York in the 1960s.A new exhibition Mass Observation: This is Your Photo offers an examination of the role of photography in the Mass Observation Archive. Mass Observation was founded in 1937 as a radical experiment in social science, art and documentary to create a kaleidoscopic view of 'ordinary life'. Iain Sinclair responds to the exhibition at the Photographers Gallery in London.