The last three episodes have really shown how good this show can be - agree about the last minute or so, but everything up to Sally's last scene was amazing. I'm always a sucker for stories where they play with the metaphysics of time travel, rather than just using it to get the Doctor to a given place and time, and that one was particularly good. About as non-linear as it's possible for a story to get.
And next week the Captain is back!
