Mastermind 2011/12 Episode 31 Grand Final ( Air Date 2012-05-11 ) Genre Talk category. Overview "John Humphrys asks the questions as six contenders battle it out to become the nation's Mastermind in this series' Grand Final. Subjects include: the life and works of JMW Turner; alchemy; the life and music of Tom Lehrer; the Diggers; whales, dolphins and porpoises; and the history of Azerbaijan 1917 - present day.".