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

Clive Myrie hosts, and the subjects are the life of Oscar Wilde, Barack Obama, the 1943 Dambusters Raid and the Spanish football club Real Madrid from 2000 to the present.

The search for the nation's Mastermind continues as Clive Myrie tests four more contenders on their specialist subjects and general knowledge.

The specialist subjects are the comedian Bob Mortimer, dolphins and porpoises, the singer Eva Cassidy and the England cricket team under Michael Atherton.