For the life of me, I can't remember a scene in the book like the one with the sorcerer in the crate. I remember Varys telling his story of his mutilation, but not the special delivery.
That was definitely a surprise. I can recall Varys telling the story, but nothing to the effect that we saw in this past sunday's episode. But it does serve to demonstrate that Varys is a far more serious player than we've been led to believe.
I was a a little sad to see what happened at Craster's Keep. I knew it was coming, but you grow attached to characters like the Old Bear. And James Cosmo has done a great job portraying Lord Commander Mormont.
But the scene in Astapor where Dany acquired the Unsullied Army was the best scene of the episode. Again, it's a scene I remember from the books. But the kicker of that scene was when Dany started speaking Valyrian to the slave trader. She had known what he had been saying about her the entire time during their previous meetings and kept her composure. And of course, Drogon did the rest! But when she freed the Unsullied, and they started stamping the ends of their spears into the ground? THAT was powerful!