Top 5 films to watch this week: May 7-13

Winner of best documentary at this year's Oscars, Laura Poitras' breath-taking portrait of NSA whistle-blower Edward Snowden is a paranoid thriller with genuine historical significance. (Opens May 7)

An early testament to Woody Allen's genius, this 1979 classic blends wit, humour and George Gershwin's timeless score to make one of the definitive romances set in New York. (May 10, part of Cine Fan programme)

With rendering inspired by Tove and Lars Jansson's original comic strips, this delightful animation follows the Moomin Family as they learn to appreciate the small joys in life. (Now showing)