Ai Weiwei

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With Francine Stock. Artist Ai Weiwei reveals why he decided to make a feature length documentary, Human Flow, about refugee crises around the world and about his own life in exile. The Oscar winning writer of The Hurt Locker, Mark Boal discusses the ethics of depicting police brutality in his latest docu-drama Detroit, which shows three police officers killing and torturing suspects during the 1968 riots. Catherine Bray and Nadia Denton slug it out to get their directors into the The A to Z of film-makers. Comedian Rosemary Fletcher considers why there's only ever one woman in an action movie, and her task is almost always thankless.