Plot: Liverpool University, venue of the first-ever Mastermind in 1972, plays host to four would-be finalists in this third semi-final match. The contenders are BILL BENT, lecturer, The geography of England AUBREY LAWRENCE, librarian, History of Rhodes up to AD 1522 DAVID MCKIBBIN, teacher, History of World War I JOHN STRATHEARN, teacher, Military operations of the 1745 Rebellion