Kaye Adams, Simon Rimmer, Danny Wallace and Nicholas Parsons sit in the dreaded black chair as John Humphrys asks the questions.

John Humphrys asks the questions in this celebrity version of television's toughest quiz. The famous faces being quizzed on their specialist subject and general knowledge tonight are Wayne Sleep, Yvette Fielding, Spoony and Brian Sewell. Subjects include Henry VIII and Ray Charles.

John Humphrys puts the questions to the famous contenders in a Celebrity version of Britain's toughest quiz. Tonight's contenders are Steve Cram, Anjum Anand, Tony Hawks and Bill Kenwright. Subjects include Sunderland FC and the partition of India.

Four more celebrities face John Humphrys and try to answer questions in the black chair. The contenders hoping to show off their knowledge tonight are Ade Edmondson, Bill Turnbull, Jan Ravens and Benjamin Zephaniah.

A new series of the celebrity version of Britain's toughest quiz. John Humphrys invites four famous faces to answer questions in the infamous black chair. Tonight's contenders are actor Paul Bradley, presenter Dan Snow, comedian Peter Serafinowicz and quizmaster William G. Stewart.