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'll Read That Again the pilot programme having been broadcast on 30 December 1963 under the title "Cambridge Circus". The ninth, final series was transmitted in November and December 1973, with fewer episodes (eight instead of the earlier thirteen per series). An hour-long 25th anniversary show was broadcast in 1989. It is comically introduced as "full frontal radio". "I'm Sorry I Haven't a Clue", a spinoff panel game show, was first produced in 1972. The title of the show comes from a sentence commonly used by BBC newsreaders following an on-air flub: "I'm sorry, I'll read that again." Having the phrase used to recover