I'm Sorry I Haven't a Clue new series rotating with the other Monday night comedy staples such as "The Unbelievable Truth", "The Museum Of Curiosity" and "Just a Minute". Excluding compilations and repeats, this totals 481 episodes, (excluding series 70). Some early episodes of the series, including the first, were wiped in the late 1970s. Following the BBC's Treasure Hunt appeal for missing material in 2002, several shows were recovered from off-air recordings made by listeners. In 2007, "I'm Sorry I Haven't a Clue: The Official Stage Tour" visited 9 locations across England. While the broadcast shows are recorded on location, this was the first ISIHAC
BBC Radio 2 significant amounts of comedy and sport. Notable broadcasters on Radio 2 in the 70s and 80s were Tom Edwards and Ray Moore who both singly presented the early breakfast show, Terry Wogan on breakfast, replaced by Ken Bruce and later Derek Jameson; Jimmy Young and his lunchtime news and current affairs show; 'Diddy' David Hamilton on mid-afternoons, John Dunn at what became known as drivetime. On Monday 6 January 1975, the broadcasting hours for BBC Radio 2 were reduced due to budget cuts at the BBC. The former 5am2am schedule was reduced to a 6am start up Mondays to Saturdays