SuspicionThe child, Amy and Rory's daughter, is River.

Amy was right to be concerned about the effect of time travel on a pregnancy. It is where River gets so much of her oddities. And River was the one in the spacesuit who shot the Doctor at the beginning of the episode. Trapped in the suit, frightened and alone most of her life, the Doctor discovers who she is, that she is both River and Amy's daughter, and goes to help her. He confronts her with her past and future at the same time, and she freaks and kills him.

Then, when she is forced to watch it all happen again, without interfering, she gets mad at the Doctor and slaps him.

Also, does no one else think that the Silence was a red herring? I mean, all the lead up, the ties to the destruction of the Tardis, and it turns out to be a single race that is discarded at the end of the first two episodes? I highly doubt that. Maybe they are agents for the Silence, or controlled by it, or even just trying to herald in the Fall, if the Silence is more a force or concept than anything alive. But there is far more to the Silence than what we are shown.

And, as an aside, it is rather annoying that every time I hear this music, I have an urge to go load up Mass Effect 2 and fight Collectors.