So, it doesn’t feel like you’re done then?
MOFFAT: I don’t know that it ever does. If you get to the point on a show that you feel like you’re done, you’ve probably gone past the point that you should have stopped. You should stop full speed, as it were, and leap off the train while it’s still going, rather than letting it grind to a halt. We won’t do that. We would never do a series of this without it passing our inspection first. We have to be so excited about it, before we start talking to the others. But there are ideas, so who knows? We’ll see.
Source and more: Collider