I liked this episode of Doctor Who. Even though it was a bottle episode and had only one character in it. Also Peter Capaldi is a great actor and he seemed to have great fun doing this. I also like the visuals of the clockwork castle. It was very opening credits like.
[Spoiler (click to open)]I figured out it was a loop by the time Doctor found the clothes but it was a nice look at how much work Doctor puts in figuring it all out. And also at his ego - even in his imagination he needs audience to impress.
There are few recurring themes this season. The frenemy part - after long enough time you can't always tell the difference - Missy, Davros, Ashildr (Me) but now it also seems to include the Time Lords. Then there is how they keep teasing us with Clara's death - it basically happens in every story she's in (Daleks, Zygons, now the Raven) - it's getting hard to imagine how the real thing is going to be like. And now we have the whole thing with the will and testament being the forced confession. A torture device meant for extracting all the deepest secrets. Even if it takes billions of years.
But we are back at Gallifrey. Finally, some answers! Like who is that old woman.