"You have got to be kidding me."
"I hate endings." More foreshadowing no doubt.
"He went to get coffee and ended up in a book. How did that happen?" "We're in New York."
"What was that?" "1938. We just bounced off it."
Rory's headstone. That's not just foreshadowing, that's labouring the point.
"Melody Malone. The detective who investigates angels."
"Get your wrist out without breaking it." "How?" "I don't know. Just do it. Change the future!"
"You changed the future!" "It's called 'marriage', honey."
"... I'm sorry, Rory, but you just died."
"What have we got?" "I won't let them take him. That's what we've got."
"I always wanted to visit the Statue of Liberty. I guess she got impatient."
This is the first Moffat-scripted episode for a while and it shows that he's been saving up the good stuff. The Statue-of-Liberty-as-an-angel is going to be one of the iconic Who images for a while now... And of course, with this whole what-bears-the-image-of-an-angel-becomes-a
Rory and Amy's leaving of the show was well played too. In particular that it was Amy's choice to leave and that it's strongly hinted that Amy and Rory keep living on their own terms in the future (for values of 'future' which probably begin some time around 1890).
In fact about the only wrong note tonight was that those blasted cigarette ads are back again.
... And in a much delayed afterthought, something makes me think that this story is going to have repercussions, even though Amy and Rory won't be around to be troubled by it. A common theme running through anything in the Doctor Who canon is that time paradoxes are seriously bad mojo. This is why things went so haywire in Father's Day, and why the Monk was much more of a threat than the trickster he seemed to be. So the Doctor (well, Amy and Rory, but you just know the Doctor's going to get blamed for it) is going to have seriously pissed off a lot of Weeping Angels by causing a paradox that imploded their nice little racket.