Loved it. Agreed that perhaps story wise this wasn't the best ever, but the execution of it was brilliant. Loving Capaldi again, but Mackie is really suprising. Awesome companion. My girlfriend, who's been a huge Who-fan for years now, was getting really bored with Moffat's stuff from the last two years, but has said that the last two episodes are really getting her back into it. And I couldn't agree more. Really entertaining tv.