This episode seemed kind of rushed to me. It felt like it could have been a two-parter, with a bit more meat given to each part of the invasion. More on UNIT, more varied attacks, more interaction with the Shakri. The Doctor literally just waved his screwdriver around at the screen and everyone was fixed and the space ship blew up.
So, if the season has been in reverse for the Doctor (the phone charger in King Henry's room basically proves it), how will the end of this episode be connected to something that already happened to the Ponds? Does he take them around for awhile, drop them off when they're tired, and then pick them up again for their trip to New York?