Mastermind 2012/13 Episode 28 Episode 28 ( Air Date 2013-03-15 ) Genre Talk category. Overview "Five more contenders vie for a place in the grand final as John Humphrys invites them to return to the black chair in another semi-final. Subjects are the life and films of David Niven, Edward III, the Pixies, The Life of Giuseppe Garibaldi and the Flashman novels of George MacDonald Fraser.".