The University of Bristol is the scene for the last of the Semi-finals. A chance for the four best heat-losers to gain the fourth and final place in this year's Mastermind Final. They are GAY SINCLAIR-GIEBEN, schoolmistress - The fictional novels of C. P. Snow DAVID FLOWER, applied mathematician - Physics JANET SAVAGE, medical social worker - The Gunpowder Plot DAVID WILSON, lorry driver - Life and works of Ibsen