The Doctor Falls ticked all the relevant boxes when it comes
to what makes a great Doctor Who finale. The stakes were higher than ever, with
the usual ratcheting up of explosions and emotions to keep the audience on the
edge of their seats.
As expected a number of threads from earlier in series 10 were neatly rounded off, such as Missy’s rehabilitation and the inevitable return of the Pilot to whisk Bill Potts away. Some however were completely ignored, with Bill’s imaginary mother being the most notable absentee, while others were intentionally left open-ended, such as the identity of Nardole, which remains a mystery even after Hazran’s gentle questioning.
The limitations of some of the clever plot devices - Bill still being Bill despite appearing like a fully converted Cyberman (with the audience’s point of view continuously shifting from Bill as she sees herself and Bill as others see her), time passing at different speeds across the ship, and the two Masters meeting, may have resulted in a story that would've been hard to get completely lost in, but for the fact that the cast were all at the top of their game constantly pulled us back into the moment.
If we were looking for closure, then like the Doctor himself we probably haven’t quite found it, and there are several outstanding questions to consider as we gear ourselves up to Moffat and Capaldi’s swansong.