Howling:Questions from Season Five

As much as I have liked the recent story arcs, I am still a little confused about a handful of points. I guess the writers will expand on them as further seasons allow, but I wanted to make sure I was not missing something.

Who is the “silence will fall” voice and what is there relationship to the The Silence? – At the time I thought this to be a threat, and the tone of the voice fitted that (the threat being the silence at the end of the universe). But knowing the silence must fall is a prophecy; it does not make sense any more.

Who visited Amy’s house the night before her wedding? Was it the speaker of “silence will fall”, or was it the Silence? Why were they there? To carry out the attack on the Tardis, or to check on Melody Pond (would she be there in this version of reality?)

Whilst they were at it, why didn’t they take revenge on River for her failure to kill the doctor? They had her in the Tardis and could have killed her.

The Silence appear to be rooted in this universe, so the plan to destroy it with the cracks and to unite the doctors enemies to stop it seems high risk (whether it was the Silence, or their mysterious ally.)

I am also confused with the clerics. In Crash of the Byzantium they seem to want the help of the doctor and consider him an ally. Yet earlier in the story line for them, they are fighting the Doctor in A Good Man Goes to War.