 It is a single CD which consists of pieces of various past versions of "Tubular Bells" albums; "Tubular Bells" (1973), "The Orchestral Tubular Bells" (1975), "Tubular Bells live" (1979), "Tubular Bells II" (1992), "Tubular Bells III" (1998) and "The Millennium Bell" (1999).The album has been re-edited so that the changes between most of the different parts of "Tubular Bells" are seamless.It was advertised on television in 2001, where the actor Tom Baker, known for his role as the Doctor in "Doctor Who", provides his voice-over.