Liked it. Not perfect, and treading ground that's a little familiar after The Lodger
, but a nice little story about the relationship between the three main characters. Enjoyed the one-to-one between Amy and the Doctor, and it was nice to see the nod to Lethbridge-Stewart. The Freak Of The Week was a bit generic, but since it was little more than a McGuffin that's hardly a crippling failure. This is one of those episodes, like Dinosaurs On A Spaceship
, that feels like it would stand up to repeat viewings.
So even with a bit of a dip in quality last episode, I think that's four-for-four this season.
They made the mistake of taking a show that kids could watch too, and turning it into a kids show that adults can watch too. There's a difference there, and we're seeing it.
Personally, I think that under Moffat the show is as smart as it's ever been. And wasn't it originally conceived as a kids' show that adults could watch with them?