Board Thread:TV Show Discussion/@comment-1399600-20160629121258/@comment-5308269-20160826145014

61.173.73.204 wrote: If that is the case, how came Benjen ended up parting ways with Bran and Meera when they were closing into the Wall? Like you said, a wight was brought into Castle Black without anyone knowing in Season One.

Perhaps Benjen would have dropped dead upon passing through. But this does not alter the fact that a wight was re-animated on the OTHER SIDE of the Wall, where most of Castle Black is situated. There may be a magical field protecting the Wall, but it clearly isn't working as well as it should. The Wall is much bigger than the Cave of the Three-eyed Raven, so the structure itself is the real defensive measure, whereas as the magical wards in the Wall are clearly out of working order. The White Walkers might get in by sending their undead foot soldiers up the Wall, before re-animating them again if they collapse on the other side of the barrier. In any case, for the reasons I just mentioned, Bran is not part of the Night King's plan to come through the Wall. They came into that cave specifically to kill him, which is why they pursued them out of the cave and into the woods.