John Humphrys puts Dr Ranj Singh, Jessica Wright, Alan Johnson and Katy Brand to the test in the classic quiz where celebrities brave the famous black chair.

John Humphrys asks the questions as four famous faces, aiming to help their chosen charities, go under the spotlight and brave the black chair in another episode of the classic quiz. TV presenter Radzi Chinyanganya, actress Ruth Madeley, politician Ann Widdecombe and TV personality Tom Read Wilson answer questions on Olympic sprinters, Will & Grace, the escape of King Charles II and My Fair Lady.