"I'm Sorry I Haven't a Clue" is a BBC radio comedy panel game. Billed as "the antidote to panel games", it consists of two teams of two comedians "given silly things to do" by a chairman. The show was launched in April 1972 as a parody of radio and TV panel games, and has been broadcast since on BBC Radio 4 and the BBC World Service, with repeats aired on BBC Radio 4 Extra and, in the 1980s and 1990s, on BBC Radio 2. The 50th series was broadcast in November and December 2007.