I'm Sorry I Haven't a Clue down opportunities to work on it as he preferred to remain a listener. The official, authorised history of the show and ISIRTA, "The Clue Bible" by Jem Roberts, was published by Preface Publishing in October 2009. Humphrey Lyttelton, primarily known as a jazz trumpeter and bandleader, was invited to be chairman because of the role played by improvisation in both comedy and jazz music. In the first series Lyttelton shared the role of chairman with Barry Cryer but he made it his own (especially once Cryer replaced Cleese as a regular panellist) and continued as chairman until his death on
I'm Sorry I Haven't a Clue June 2009, chaired by Fry with the usual panellists and special guest Victoria Wood. Every series since then has been chaired by Dee. The regular panellists for much of the show's history were: The show has had a number of producers over the years: Early episodes featured Dave Lee, who provided piano accompaniment on "I'm Sorry, I'll Read That Again". However, Colin Sell now usually fills this role. He is often the butt of jokes about his musical ability to which he is unable to respond as he has no microphone. For example: "When music experts hear Colin's compositions, they