Bill being saved by the water chick from episode 1 could be seen from a mile away (or a week away). Since there's not much hope for her once she was converted to a cyberman, that was pretty much what I was expecting since last week's ending. That's two season endings now that the companion has had a bittersweet ending with them buggering off into space with another chick.
You could also see Missy being stabbed in the back by the Master as that whole scene unfolded... but that was quite satisfying to watch unfold none the less.
Guess they must be thinking that they can't keep the secret long enough for us to know from just watching the show.
With this whole, "I can't keep being someone else" thing, and the fact that we know that he'll regenerate into past incarnations down the track, I was hoping that we'd get to see Paul McGann take another crack at the role. His performance in the pre-anniversary short to give him his regeneration was great. Wouldn't mind seeing that sort of performance for a few seasons and it would come off quite nicely with the tone that Capaldi is leaving the Doctor on as a man who's ready to give up everything to help others.
I swear, that running gag just rules out all red heads from ever becoming the Doctor.
Either way, we may need to wait till 2019 to get the next season. 2018 is gonna be a dry TV year for me since there's no GoT and maybe no Doctor Who. They're literally the only two TV shows I currently watch. May have to catch up on other shows like Westworld and Stranger Things.
Got to laugh at some of the comments out there about this ,people had no problem with the Master being Missy but for some reason the Doctor can't do the same - I'm going to wait and actually see how it plays out and what the stories are like!