This week's Mastermind comes from Perth City Hall, Tayside, where four more contestants answer questions put to them by quizmaster Magnus Magnusson. In the spotlight tonight are Robert Devlin, Dr Malcolm Walker-Kinnear, Roger Smith and Lesley Konopielko. Their specialist subjects include world heavyweight championship boxing, the seafaring novels of Patrick O'Brian, mountaineering in Scotland, and the life and career of John F Kennedy.