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