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 Sorry I Haven't a Clue" version once employed the famous actress (and fan of the show) Dame Judi Dench in this role and the renowned television gardener Alan Titchmarsh. Each began by performing a mime illustrating their occupation, giving a cryptic clue to the panel (appearing to a radio listener as a short silence punctuated by exclamations from the panel and laughter from the studio audience), before fielding apparently serious questions from the teams (e.g. "Is that your own hair?" or "Do you kill people for money?"), who pretended not to know who they were. Musical games often involve incongruities