When the Doctor realises Clara is inside that Dalek casing and he is so angry with Missy he tells her to run and Missy actually does run because she knows she’s awoken a beast but he can’t even take his eyes off Clara. That moment broke me.
Nobody’s ever safe. I’ve never asked you for that, ever. These have been the best years of my life. And they are mine. Tomorrow is promised to no-one, Doctor, but I insist upon my past. I am entitled to that. It’s mine.