We watched "The Empty Hearse" last night and enjoyed everything short of the end. The plotline of Watson coming to terms with Sherlock being alive was very good, and I liked the addition of his fiancee to the cast. Same goes for the various theories on how Holmes survived his fall from the building.
SPOILER:
The solution to the bomb threat was weak. Oh, so they all just happen to have an off-switch, do they? How convenient for the great detective...