sentences:  The story may have been considered to incorporate the Sixth Doctor.Written by Peter Ling & Hazel Adair, this story developed out of plans by producer Nathan-Turner to create a sequel to the 1960s soap opera "Compact", entitled "Impact".When, after drafting three or four scripts for the proposed "Impact", Nathan-Turner informed the pair that plans for the soap had been cancelled, the producer offered them the opportunity to write for "Doctor Who" as a form of compensation.