The semi-final stage of this year's competition opens tonight at the University of East Anglia in Norwich. Four winners of the first round heats compete for a place in the final of Mastermind 1984. Robert Foulkes (schoolteacher) Mars novels of Edgar Rice Burroughs Richard Joby (lecturer) Life and career of Isambard Kingdom Brunel Malcolm Parnell (publicity manager) Novels of Evelyn Waugh Primrose Wood (physiotherapist) Life of Sir Francis Drake Director