sentences:  It was still under consideration in April 1981, when Jack Gardner was asked to expand "The Dogs of Darkness" into full scripts for the Fifth Doctor for Season 19.Written by Andrew Stephenson, a scene breakdown for this four-part story was commissioned on 18 March 1980.Written by James Follett, this involved monsters attacking a race of beings who live inside Halley's Comet, unaware that there is anything beyond it they believe that their world is the sum and total of the universe.