Other presenters included: The idiosyncratic Bob Symes showcased smaller inventions in dramatised vignettes with themes such as "Bob Goes Golfing". These often presented challenges for film directors with whom he worked when a close-up was required as Symes's own invention-related exploits in the workshop had resulted in him losing parts of several fingers. It was hard to find a finger that did not look too gruesome to show on screen. Other regular features included "Whatever Happened to...", picking up on the oft-levelled criticism of the show that a significant number of inventions seemingly were never heard of again. In many cases the show offered the British public its first chance to see key technologies that subsequently became commonplace, notably: Perhaps the best-remembered item in the programme's history was the introduction of the compact disc in 1981, when presenter Kieran Prendiville demonstrated the disc's supposed indestructibility by scratching the surface of a Bee Gees CD with a stone. The show also gave the first British TV exposure to the group Kraftwerk, who performed their then-forthcoming single "Autobahn" as part of an item about the use of technology in musicmaking. Another programme concerning new technology for television and stage lighting featured The Tremeloes and the Syd Barrett-led Pink Floyd. Featured inventions that did not change our lives included a fold-up car that fitted into a suitcase, numerous gadgets such as a miracle chopping board for the kitchen, and collapsible knives and forks. Members of the public frequently sent in their ideas. By the late 1990s, the live studio demonstrations were dropped in favour of purely pre-recorded items. The final series, presented by Adam Hart-Davis, Kate Humble and Roger Black, attempted to revert to the original live format of the show, even using a remix of one of the theme tunes used during its more successful years, but ratings continued to fall, and with only three million viewers in the last series the BBC decided to axe the show. At the time they said that they would produce a number of science special editions under the "Tomorrow's World" "brand" from time to time. The "Tomorrow's World Roadshow" appeared in 2004 with Gareth Jones (co-host of CITV's "How 2") and Katie Knapman taking the helm as the last presenters of a show bearing the "Tomorrow's World" name, before a partial return to television in 2007. For the 1000th episode, a commemorative CD was produced by Nimbus Records.