Throwing out the Doctor with the Dark Water
"Dark Water," the 11th entry in a 12 episode series, trundles along with a certain amount of professional competence, but is very far from being good drama.
The episode bears almost all the flaws we have come to expect from Steven Moffat's latter oeuvre. A story with the density of rotten sea-ice that groans along at a glacial pace and tedious swaths of explanations that don't, actually, explain much at all.
The upside includes excellent performances by Peter Capaldi and Jenna Coleman and, especially, from Michelle Gomez as the mysterious Missy.
Want more? Throwing out the Doctor with the dark water includes spoilers as per usual, including a couple of Big Reveals; click at your own risk if you haven't seen it yet.