(continued...accidental post) save his own skin, yet Hodor followed him all this time with probably at least some subconscious knowledge (or full) that he'd end up holding that god damn door. and he held that god damn door.
One thing/someone that has not been in the show (kinda) yet but was in the books is most likely Meera & Brans' out BTW. I won't spoil it for those of you who don't want theory or book spoilers.