Holy shit that White Walker scene was insane!
The books haven't even shown us that much yet.
I knew they were going to have to drastically add to Bran's story to buy him some time, but I wasn't expecting them to go in this direction with his story. I'm not complaining though, as I really liked his scenes. It was hard watching Hodor get tortured, though. Felt a bit odd that Sam told Jon about Bran, though.
I loved the scenes that Jaime shared with Tyrion and Brienne. Lots of good stuff coming up with all of those characters.
The opening in Mereen was also really great as well.