 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.After a period of split chairmanship in the first series, Humphrey Lyttelton ("Humph") served in this role from the programme's inception until his death in 2008.