<P> Almost every edition of Tiswas was transmitted live and only recorded in case of any future IBA investigation (as was standard practice at the time). Accordingly, they suffered the same fate as a number of 1970s children's series in that they were thought to have no further commercial use (the idea of home video entertainment was still in its infancy), and therefore many master tapes were wiped for re-use . As a result, very few programmes officially exist in their entirety . Those that were kept were often stored in poor conditions, which led to severe picture deterioration, so they are no longer of broadcast quality . </P> <P> However, some did survive; many viewers made their own recordings and in many cases these are the only existing copies of the programmes . Members of the production team and performers on the show would also record their appearances, leading to many episodes existing in private hands . In 2006, ITV began a search for many missing ITV programmes, including Tiswas, for their Raiders Of The Lost Archive series broadcast in 2007 . </P> <P> Their website reveals that only 22 episodes are known to officially exist in their entirety: episode 60 from 30 August 1975, four episodes from 1978, two episodes from 1979, two episodes from 1980, five episodes from 1981 and nine episodes from 1982 . Incomplete segments from show 151 (broadcast on 10 December 1977), an episode from 1978 and two episodes from 1979 are also known to have survived . </P> <P> The prolific TiswasOnline fansite features an in - depth episode guide for the whole series, detailing where an episode is known to exist, whether as a private home recording or in the official archive . ITV plc has confirmed to TiswasOnline that many more programme elements (other than those officially known to exist) have been kept, but as yet these have not been fully catalogued . This may include insert material such as animations and graphics or filmed clips . Furthermore, the Tiswas Reunited programme in 2007 resulted in the discovery of further footage . </P>

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