I'm Sorry I Haven't A Clue20/04/2011BBC Radio 4 Extra Duration: 30 minutesFirst broadcast: Wed 20th Apr 2011, 09:30 on BBC Radio 4 ExtraLatest broadcast: Thu 21st Apr 2011, 01:30 on BBC Radio 4 ExtraComedy panel game with Humphrey Lyttelton, Willie Rushton, Barry Cryer, Graeme Garden and Tim Brooke-Taylor. From May 1982.GenresComedyFormatsGames & QuizzesBrandI'm Sorry I Haven't A Clue Source: BBC Online