Always happy to see little snippets of Gallifrey and nods to the old Timelords.
I didn't like the Dalek episode much - an opportunity wasted IMO. All that back-story and history with the Doctor and The Daleks gave Moffatt so much potential for some great dialogue but it didn't happen.
Can't say I overly enjoyed Robots of Sherwood much. The ending was really, really naff.