Is that what he said... When Mormont introduced Jon to one of the other rangers, the guy said "Oh, this the one that killed the Wight?" I thought he said White, as in White Walker.The mounted one was The Other, or White Walker. The "zombies" were Wights, normal folk brought back from the dead. That's why the Lord of Bones/Rattleshirt said to burn Qhorin HalfHand.
Looks like Brynden "The Blackfish" Tully (Catelyn and Lyssa's uncle) has been cast:
'Game of Thrones' casting: Is this the Blackfish? | Inside TV | EW.com
Agreed. Though it's the scene between Jamie and Brynden in book 4 that I'm more looking forward to.