Sorry; busy week, and I'm just catching up now.
Here's what I posted on my FB page, for reference:
"Here in the States, BBCA is running promo ads for this season that say "every story has a beginning, a middle, and an end - but not necessarily in that order." I think that's the key. This season has been running backwards. Episode 1 is last chronologically, but first in broadcast order. Last night in ep 4, we saw the three of them under Henry VIII's bed. In ep 3 last week, the Doctor mentions Rory leaving his phone charger in Henry VIII's ensuite. In ep 2, Neffi asks Amy if she's a queen, and Amy says yes - because she said "yes" to Henry VIII by accident in ep 4. We know the Angels send people back in time; I think that has something to do with the episodes going back in time."
Followed by: "Plus, at the end of ep1 when the Doctor isn't recognized by the Parliament of the Daleks, WHERE ARE THE PONDS? They are not there when he's twirling around the console. In ep 4, the Doctor says "I'm running to you before you fade. I've known it for a long time." And we know we'll see River next episode; the Doctor knows when River is going to die (even though 10 does not), and it's something similar with River's parents. Moffat was right; Amy and Rory both die next episode. Or something mind-warping will happen."
It's not perfectly linear; indeed, Brian definitely meets the Docotr in ep2, and is comfortable around him in ep4. Another interesting thing I noticed when I rewatched ep4 is when they come back into the TARDIS and Brian is still watching the cube. The Docotr says something along the lines of "you've been here three days," and Brian says something like "time flies when you're concentrating." I'm wondering if there's a time gap in there; what if Brian's really only been there for a short while (maybe a few hours)? Or does he know the TARDIS well enough to find the nearest loo? Something about his reaction there, and his reaction when he tells Amy and Rory to go adventuring at the end, just screams out that he knows more that he's letting on, even to the Doctor. Or maybe I'm reading too much into it.
At any rate, I've really enjoyed the common threads through all the episodes so far. (Lights off/eggs/Christmas/memory and "remember") There's too much for there not to be a payoff, either Saturday or further down the road in Season 7.