I'm Sorry I Haven't a Clue, sometimes abbreviated to ISIHAC or simply Clue, is a BBC radio comedy which has run since April 11, 1972. Since then, the programme has had several series each year, being broadcast on BBC Radio 4, BBC 7 and the BBC's World Service. The show, introduced as "the antidote to panel games", consists of a panel of four comedians, split into two teams and "given silly things to do" by a chairman.
The show was conceived as a parody of the then-ubiquitous radio panel game, and includes elements that satirise such shows, both on radio and television. The start of the 50th series of the show aired on Monday November 12, 2007 on BBC Radio 4 at 6.30pm.