Mm - worse than last week's, feeling laboured and foolish, with far too many inconsistencies and questions. In this I think that the one-episode plots are working against the stories. And awful dissonance between the jokey 'fun' and the fact that this is set during the Blitz and that so many millions will die and the Doctor is refusing to help as if that's all a lark.
Plus the Doctor periodically appears to forget that he's a time traveller.
The over-emphasis on the season arc appearing at the end of every episode is beginning to annoy me. They should have it appear in the background at some point during the episode rather than this laboured underlining. The Master becoming Prime Minister arc in the earlier season worked so much better.