released on audio by Big Finish Productions in 2010 as part of the Lost Stories series, with actress Jean Marsh reprising the role of Sara. There was some discussion about spinning off the characters of Henry Gordon Jago and Professor George Litefoot from the 1977 serial The Talons of Weng-Chiang into their own series, but this was not taken forward on television (although it has been produced on audio). The concept art for an animated Doctor Who series was produced by the Canadian animation company Nelvana in the 1980s, but the series was not produced. CBBC originally expressed an interest in a Young Doctor Who series, chronicling the childhood of the Doctor. Russell T Davies vetoed this concept, saying "somehow, the idea of a fourteen-year-old Doctor, on Gallifrey inventing sonic screwdrivers, takes away from the mystery and intrigue of who he is and where he came from,". He instead suggested The Sarah Jane Adventures (see above). A further spin-off of Doctor Who—Rose Tyler: Earth Defence, a 90-minute special that could possibly become an annual event—was cancelled by Davies at a late stage of its development. He considered it to be "a spin-off too far", despite the production having been commissioned and budgeted by the controller of BBC One. Prose fiction Novelisations Novelisations based upon individual Doctor Who serials were first published in the mid-1960s, the first being Dr. Who in an Exciting Adventure with the Daleks by David Whitaker, a loose adaptation of the show's second serial, The Daleks. Doctor Who novelisations became something of a tradition beginning in the early 1970s when Target Books (initially published by Universal-Tandem, later to become part of W.H. Allen & Co and then Virgin Publishing) began publishing them on a regular basis, initially based upon the then-current Third Doctor's episodes, but soon expanding to include all past Doctors as well. The initial three novelisations had been published in various editions both inside and outside the United Kingdom (editions appeared in the Netherlands, Canada and the United States). Further foreign editions of the novelisations appeared from the 1970s, with the books being translated for readers in the Netherlands, Brazil, Turkey, the US (where the texts were slightly tweaked to eliminate unfamiliar Anglicisms), Japan, West Germany, Portugal, France and Finland. By 1994, when the final Target book was published, all but six of the broadcast Doctor Who serials had been novelised, as well as a