City of Death (note requires Real Player - actually it doesn't require it, but I just wanted to say such an anachronistic thing). Then he was commissioned to write six episodes. They got abandoned after three because of a strike. What Gareth Roberts has done here is write a novel based on all he could get hold of with those scripts.
Unfortunately I found that the combination was lesser than the sum of its parts. It's well written, but not as brilliant as I might have hoped. The story is quite slow, but not tedious and the ending doesn't disappoint. Maybe just for fans only.