This tense, dramatic and highly-rated quiz competition embarks on its fifth series to discover the ' Mastermind ' for 1976.The contenders for the title are faced with a formidable challenge to their intellect, requiring them to be complete masters of their chosen subject and have a wide general knowledge.Contenders:ROBERT ORR, student, Russo-German War, 1941-1945;ALWYN JAMES, freelance editor, Life and Works of Dylan Thomas;MARY KEAN , housewife, SwitzerlandMICHAEL DYCHE, RAF navigator, Captain Cook