It's a self creating paradox: he wasn't sat there wondering how to set the plan in motion because it already was in motion. This is not the first time this premise has been used in a science fiction story. It's been used in one form or another for decades. Ever see Star Trek IV, in which a time travelling Scotty gives a scientist the formula for transparent aluminium since he knows the guy was due to invent it anyway?
Why would they take it from him? He couldn't move and even if he could, the Sonic couldn't open the prison from the inside, only from the outside.
Why would he? He had no idea what was in it, only that it was supposed to contain something dangerous.[quote]

The whole story was riddled with problems like this... Oh can anyone tell me where young Amelia went to at the end. Amy and her younger self were together and then they weren't... [/QUOTE As the Doctor explained in that very same scene, she was erased as the cracks were catching up with the present.
Sorry, but I think you missed a lot of what was going on. It was all quite clearly explained, it did actually make sense.

I see the majority of people liked it anyway Tony so that's all that really matters.

I personally enjoy it when clever things happen in plots that I think I should have worked but didn't. It's something I was hoping for but it all arrived in a rather contrived manner, I feel...

I did like the 'something blue...' wedding idea though.

Just one word to describe: ..... Brilliant

And here's a few more .... Moffatt, Matt Smith & Karren .... awesome series ... MS is just brilliant as the Doctor ... been so pleased and the finale was just superb. Roll on the Christmas Special and the Next Series

Like the bit in the museum when someone said 'Where's Amelia?' and they ran round looking...and the Doctor explained...

I liked the use of time travel in the episode.

1> http://en.wikipedia.org/wiki/Predestination_paradox used in a lot of sci fi time tavelling.

2> I doubt the alliance see the sonic as a weapon as it isn't. It is a tool so not anything that will help the Doctor defeat them.

3> The Doctor wouldn't have just gone ahead and opened the Pandorica as he didn't have a clue what was in it. Even he is not that cocky to open a box supposedly contaning the 'most feared being ever' without a clue what was in it.

4> The univese was being erased. She disappeared. This was explained in the episode when they realised she was gone.

I'm not really looking to start a long running debate here with people who are a bit over protective of it...

It's a good show and I did enjoy but I was hoping for a bit more pay off that's all.

A few people have mentioned now that the Amelia and Amy thing was explained in the story so thank you for that.

But the way the Doc got out of the Pandorica was a cop out for me. Thanks to those people who have pointed out that the idea has been used in other shows but I'm afraid all that means to me is that they did a cop out too...

I must stress though it did achieve what it was meant to and that is it was entertaining. I just wanted to be challenged a bit more that's all