This was a fun episode, but once again the new creative minds behind Matt Smith's Doctor were swollen on enthusiasm and good ideas, but starved on time. It's a real shame, because there is so much genuine good energy in this new series, but the hour time-slot just isn't a big enough canvas, and as a result, the finished product once again felt rushed.
Moffat should stick to two-parters. The previous Stone Angels two-episode story was wonderful; the pacing fit the amount of material. But Vampires, while not as horribly crammed as "The Beast Below", still suffered, particularly in the last quarter.
I want to point out that just because there is a lot of good intention and obvious skill in these new episodes, it should NOT be taken as a free pass. Episodes 2 and 3 of this current season of DW were so bad it actually hurt to watch them. They could have been brilliant, but instead they were disasters of which the creators should be ashamed.
Vampires was nearly good enough, worth a 7 out of 10, but it would have been an easy 9 had it been stretched out for another fifty minutes.
I shudder to imagine what this episode must have played like on American TV where an extra five minutes was cut out to make room for more advertising!