and I think Moffat is aware of that sort of thing. I have always thought of him as a counterweight to the Davies school of thought (which only embraces the mainstream baddies). While I did first think that the voice sounded like Davros, I really hope it is not.

I also have issues with the Valeyard theory. The Dream Lord was the product of psychic pollen, and should have no effect on the real world. His only function would be as a foreshadowing. But that foreshadowing would also mean that if the Valeyard or something similar is the big bad, the Main Problem is basically a repeat of what has gone earlier in the season (or in the former season if this becomes the topic of a whole 6th rather than just something for the Christmas Special). I suppose we are nearing the time when the Valeyard would show up, but I don't know. Wasn't that dealt with?

Edit: I forgot to comment on your Guardian objection. The Black is balanced by the white, yes, but he does not have to show himself beforehand. I always took the appearance of the White guardian at the beginning of Key to Time to be an illusion made by the Black in order to get the Doctor to do the thing. Even if that is not the case, there cannot be a rule which states the one must be visible before the other can act. Or are you referring to something I have missed?

I will admit I see Guardians everywhere. I thought the Woman in White in the final Tennant episode might be the White Guardian at the time. I don't think so now.