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
I'm Sorry I Haven't a Clue story became a favourite of Lyttelton's, who claimed in interviews that the "distinguished actor" had never actually been named on the show. Since 18 May 1985 (in the same episode as Kenny Everett made his debut) the show has included a fictional and completely silent scorer "whose job is eased by the fact no points are actually awarded", usually "the lovely Samantha" who sits on Humph's left hand. There is a seat with a microphone next to the Chairman which is "used" by Samantha. During the introductory music Humphrey Lyttelton would stand up and "help" Samantha into her seat. In