I'm Sorry I Haven't a Clue show's longevity. On 18 April 2008 the producer of "I'm Sorry I Haven't A Clue", Jon Naismith, announced that, owing to hospitalisation to repair an aortic aneurysm, Humphrey Lyttelton would be unable to record the scheduled shows and that they would have to be postponed. The final show of the 2008 "Best of" tour on 22 April would be presented by Rob Brydon. Following Lyttelton's death there was speculation that the series might be cancelled because replacing him would be extremely difficult if not impossible. In a eulogy in "The Guardian", Barry Cryer did not allude to the future of
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