Contestants test their grey cells; Quiz.
Should your mind go blank the moment you sit in that famous black chair, there's a good chance you could find yourself in the papers like recent hopeful Kajen Thuraaisingham who made the headlines after scoring just five, the lowest mark in Mastermind history.
Still, we probably shouldn't judge him too harshly. Many people who normally cruise to victory in their local pub quiz or shout out the answers while sitting at home would dry up if they were faced with the lights, cameras and question master John Humphrys.
Hopefully, they won't have too bad an effect on the latest bunch of participants, who will be answering questions about Lester Piggott, Preston Sturges, the Weimar Republic and Edward Marshall Hall, proving once again that while Mastermind may be difficult, it's also very eclectic.
Host: John Humphrys.