From Doctor Who TV:
Neil Gaiman has explained that he really wants to terrify fans should he write another story of Doctor Who, feeling that Nightmare in Silver didn’t quite deliver on that front.
Speaking about the pros and cons of returning he said:
On the one hand I don’t have time to write Doctor Who. It doesn’t pay very well, but you also have to rewrite it and rewrite it and rewrite it and never get paid, whereas in America you get paid for every rewrite… And there are lots of things including movies, novels, an HBO series that I should be doing…
On the other hand I haven’t done an episode set on Earth yet, and I haven’t created a new monster. And there’s part of me that feels… I haven’t scared anybody yet.
‘The BBC website used to mark out of ten how scary an episode would be [Fear Factor]. The Doctor’s Wife was probably only a 2, maybe a 3. The Cybermen has a few little scary bits but it’s running at about a 5 or 6. I’d love to a 9. I’d love to do something that sends adults behind the sofa too and makes them wee. Pools of wee.”