Okay, this is what I am told: This episode is the one written by Mark Gatiss and is the fourth to be filmed but will be the third episode aired. Also:So you think that these pics are indeed from Episode 4, but that Gaiman has actually written Episode 3? I'll see if I can confirm that.
Gaiman has been saying for months that his episode is the third episode to be aired. As I say, I can't be 100%, but based on what's been said over twitter it certainly appears that way so any clarification that you can provide would be greatly appreciated.
Cheers.
There is a giant doll's house involved.
No confirmation (yet) on which episode will be Gaiman's.