A harmless enough episode I suppose. Somethings wrong with the Tardis and it won't land properly. The Doctor is stuck on earth and has to work out what's keeping it (and Amy) from landing. He moves into a ground floor flat as a lodger because there is something very odd going on upstairs. People are being lured in off the street to "help" the occupant upstairs. And then they disappear.
So there's lots of comedy about the Doctor trying to fit in, play football, interrupt romantic moments, etc. All well and good but frankly I'm glad it didn't overstay it's welcome.
Eventually we get to what's going on upstairs. Quite a nice idea actually. There is no upstairs, it's another Tardis like ship camouflaged like an upstairs flat. It's stuck on Earth and is looking for a new pilot to continue its journey.
So danger averted the other time ship implodes and the top floor disappears from existence. No mention of who's ship it was which is either deliberate or an oversight.
Minor plot niggle, why didn't the Doctor just go and investigate upstairs as soon as he arrived?
And yes, I know I skipped writing anything about last week's episode. Frankly it was fairly weak and I couldn't work up any enthusiasm about it.