SPOILER ALERT

- The fish fingers and custard thing. I thought that was going to be the cure for the poison, and I thought he went back to young amelia to get those (and he was faking dying the whole time). I also noticed that he had the same clothes he wore to Amy's wedding.

- In line with the above, there was a scene in The Eleventh Hour where it looks like the doctor came back to amelia in the morning (just a scene of her looking up to something while the TARDIS landing sounds are going on). It didn't fit in with anything from that season, and was never revisited in the Big Bang.

- Maybe the doctor wasn't really dying? And it's just a trick to get River to give up her remaining regenerations.

- Also, does this mean the doctor now has more than 1 regeneration left (since River used up all of hers to revive him).