show itself, tell a similar style of story and feature ex-Doctor Who stars in roles similar to those they played in the series; these include a direct-to-video series starring Colin Baker as "The Stranger", and a separate series of audio dramas starring Sylvester McCoy as "The Dominie". In later episodes of The Stranger, it was made clear that not only was the Stranger not the Doctor but that their backgrounds were not even remotely analogous. Some of this clarification appears to have been the result of BBC pressure. Next to this they also released: Doctor Who parodies (Do You Have A Licence To Save This Planet?) Films and Audio Books that use elements that are very close to Doctor Who, but the names were changed to keep the BBC at bay (video: Cyberon, The Stranger; audio: The Dominie and Alice, Fred , Cyberons, Infidel's Comet, The Pattern) Films that have no connection to Doctor Who besides the actors: The Airzone Solution (Colin Baker, Nicola Bryant, Peter Davison, Sylvester McCoy, Jon Pertwee), Souls' Ark (Colin Baker, Wendy Padbury, Carole Ann Ford) Some contributors to these independent productions in the 1990s later contributed to the television series after its return. They include writer/performers Mark Gatiss and Nicholas Briggs and novelist/modelmaker Mike Tucker. Audio Many audio productions based upon Doctor Who have been produced over the years. The first, in 1976, was a children's audio adventure entitled Doctor Who and the Pescatons by Victor Pemberton. In 1985, during a period when the series was on a sabbatical at the BBC, BBC Radio hired Colin Baker and his TV companion Nicola Bryant to reprise their TV roles for a new production called Slipback. In the 1990s, the BBC began issuing the soundtracks of serials from the 1960s on cassette and compact disc; initially these were the "lost" episodes, but have also included serials from the 1970s and 1980s. There were also two further radio dramas: The Paradise of Death (1993) and The Ghosts of N-Space (1996), both featuring Jon Pertwee, which like Slipback were first broadcast on BBC Radio. Beginning in 1999, Big Finish Productions, under licence from the BBC, began a range of audio plays on compact disc, with one released every month. Big Finish have also produced a limited-run series of audio plays based around one of the Doctor's former television companions, Sarah Jane Smith, as well as a limited Doctor Who