Stephen Moffat's Doctor Who difficulty
Stephen Moffat finds penning 'Doctor Who' an ''exhausting'' process because he is always trying to write for someone with an ''extraordinary'' mind.
Stephen Moffat finds writing 'Doctor Who' "exhausting".
The producer - who has also penned episodes of 'Sherlock' - admitted while he has fun writing for the BBC One sci-fi show's titular character, he finds the process difficult because he is trying to write for a person with an "extraordinary mind".
He said: "The Doctor is brilliant fun to write, but he's exhausting, because you're constantly trying to write somebody who's got an extraordinary mind, when you've only got an ordinary one.
"I have to do that with Sherlock Holmes as well."
Stephen also revealed there is "nothing" he won't do when it comes to 'Doctor Who', which is why he decided to introduce a mid-series break for the first time in the show's history to avoid a "sag".
He added to Doctor Who magazine: "I wanted to avoid the mid-season sag. Not a sag in quality, but a sag in event status. It was particularly noticeable last year.
"There is nothing I won't do. No, I kept saying, 'We should have a big event in the middle of the series. We should have something that really attracts attention, so there isn't that sag'.