Timeboy's Speculation for xmas special

Lets inject some spoilers into the speculation!

Few spoilery tidbits from the opening two parter for everyone to ponder:

Towards the start of the episode we have the traditional "Where are we up to now?" conversation between the Doctor and River Song. This time, in a 1960s American Diner.

Expect timey-wimey antics on the scale of "The Big Bang"

Amy finds something out, and River Song asks for her word that she'll keep it quiet.

(I know nothing more than those brief nuggets at the mo, so can't expand, sorry!)