abstract:Slipback is a radio audio drama based on the long-running British science fiction television series Doctor Who, produced by the BBC and first broadcast in six episodes on BBC Radio 4 from 25 July to 8 August 1985, as part of a children's magazine show called Pirate Radio Four. It was later released on cassette and CD, most recently by BBC Audio and free with the 27 April 2010 edition of The Daily Telegraph newspaper via WHSmith.