With Magnus Magnusson from the University of Lancaster's Great Hall. Mastermind is back for its 18th series with the first of this year's 64 contenders for the title Mastermind 1990.Who will win the, first place in the semi-finals?Anthony Wilkinson (police officer) Roman conquest of Gaul, 58-50 BC; Arfor Wyn Hughes (art teacher) Impressionist and postimpressionist painting, 1830-1914; Hilary Forrest (teacher) Life in the English country house, 1550-1830; Jack Clark(retired chief copytaker) Diary of Samuel Pepys , 1660-1669.