The BBC Press Office have released the synopsis for the final episode in the current run:
The Doctor's heart-breaking farewell to Amy and Rory - a race against time through the streets of Manhattan, as New York's statues come to life around them...
With Rory's life in danger, the Doctor and Amy must locate him before it's too late! Luckily, an old friend helps them and guides the way.
Guest stars: Mike McShane, Alex Kingston and Rob David
Written by Steven Moffat
Executive produced by Steven Moffat and Caroline Skinner
Directed by Nick Hurran
Produced by Marcus Wilson