Story : Memory, recall, speed, concentration. These are just some of the qualities required of a contestant entering Mastermind. Four such Masterminds appear tonight in this fourth heat which comes from the City University in London. The contenders are: ANDREW WOOD, sales assistant - Life and Works of Dante Gabriel Rossetti GEOFFREY REYNOLDS, image intensifier tester - Life of Sir Francis Drake HAZEL margin, project engineer - Lady Members of the House of Commons SIR DAVID HUNT, retired ambassador - British Campaigns in North Africa -World War II