Four more heat-winning competitors take up the challenge to gain a place in this year's Mastermind Final.This is the second of the four Semi-final matches which comes tonight from the University of Surrey.The four contenders are :SUE JENKINS, student teacher - France in the 17th century TIMOTHY, BEAUMONT freelance journalist - The History of the Liberal Party since 1877John MCKEAN, licensee - Venomous reptilesPETER RICHARDSON, production manager -Tolkien's fiction