The Ghosts of N-Space is a radio drama based on the long-running British science fiction television series Doctor Who. It was recorded in 1994 and finally broadcast in six parts on BBC Radio 2 from January 20 to February 24, 1996. This was the second Third Doctor radio play, following The Paradise of Death in 1993. Plans for subsequent serials were abandoned after the death of Jon Pertwee in May 1996. It was written by Barry Letts, and featured Jon Pertwee as the Third Doctor, Nicholas Courtney as Brigadier Lethbridge-Stewart and Elisabeth Sladen as Sarah Jane Smith.