The question had to be how could the possibly build on last week's Extremis, this episode promised so much, and for the most part I felt it delivered. You can't watch it without being incredibly aware of the huge political message being driven, the possibility of World War Three.
OK, the Monks made a good adversary, I liked them, creepy, measured, and a matter of fact element to them, no shouting or berating, just a clear message, domination. I loved their illuminated strands that could tell the future, and there's also a question mark hanging over the possibility that we're actually in another simulated world.
Absolutely loved Erica, played by the brilliant Rachel Denning, how nice would it be to see a return from her. Pearl Mackie was excellent as always, but I wasn't too convinced about the mix of Generals and Colonels.
Elements of the story have been done to death, the countdown timer, the viral bacteria, so it loses a couple of marks for originality (lack of)
I know the FA cup final was on, but they've started changing the broadcast time every week again, come on BBC, that's not on.
A little down on par compared to the very high standard set this season, but it still has a quality, I am left with a sense of intrigue as to how the trilogy concludes, and what impact Missy has.