In another heat, four contenders take on the famous black chair, answering questions on their chosen specialist subjects to earn a place in the semi-finals.

Clive Myrie hosts and asks questions on the Welsh politician Aneurin Bevan, the musicals of Stephen Sondheim, the classic television series Upstairs, Downstairs, and Jigoro Kano and the origins of Judo.

Four more contenders face the black chair under the spotlight and the ticking clock in an attempt to become the next Mastermind champion.

Clive Myrie hosts and asks the questions on the contestants' specialist subjects, which this time are the planets of the solar system, the films of Kirsten Dunst, the song cycles of Franz Schubert and the BBC crime drama series Shetland.