This one was all about making choices and the relationships between the characters. The plot was irrelevent and wasn't meant to be the focus IMO. Amy getting out-of-time could have happened any number of ways. I think it also sets up Amy & Rory's departure from the series.
Oh, I agree the character work was excellent. And the makeup on future Amy was incredible.
Yep - I certainly can't think of a better example off the top of my head.Best, most realistic 'aged' makeup I've seen on anyone, anywhere.