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I'm liking how the two-parters this season seem to be set up so that parts one and two are increasingly different. The last two episodes had the same cast and setting but were tonally different, now we have these episodes with one character but very different everything else. I'm guessing we aren't going to be seeing the last of Ashildr, either, given she seems to be this season's arc character.

I liked finally getting the link back to Fires of Pompeii, that was cool. The training stuff with the vikings was all gold, too. Honestly, there were only two things about this episode that didn't work for me. The first was how I kept waiting for the plot twist with Ashildr - I was expecting her to turn out to be Jenny from The Doctor's Daughter and was constantly looking for clues. The second was the villain's Monty Python and the Holy Grail bit. I love that movie and all, but that was just too silly.