Writer and actorMark Gatissloves horror so much he once hosteda history of the subject for the BBC.
But we didnt really.
[Laughs] For me, the DNA ofDoctor Who, from my childhood onwards, is fear.

Credit: BBC America
But its really crucial to me that you get proper scares.
For kids, its wonderful to be frightened.
I still have that.
One of my abiding joys in life is a good scare!
If the showdoescause you to have sleepless nights, you could blame Gatiss own insomnia.
Im very interested in the mechanics of sleep and the idea of one day getting some, he chuckles.
It was going to be a two-parter, and all that back-story was part of that.
In the end, I crunched it down once it became found footage.
Sleep No More will screen onBBC America, Nov. 14, 9pm ET.
you could see a trailer for the episode, below.