The Final Five

For 17 years Boswell Taylor has supervised, co-ordinated and edited all the specialist questions for Mastermind yet he denies that he's the fount of all knowledge that some might believe. There are five people who'd like to know what he's set them for the final. They are only one step away from taking home the Caithness bowl, the coveted Mastermind Trophy. How are they preparing for their final? And how does Boswell find the questions?