Was the show hinting that Bran could possibly change the past through his time wargs? It seemed like Ned did hear Bran when he yelled and then the three eyed raven warned that the past was already written...but he looked scarred when he said that as though he knows it's possible but he was warning Bran because the consequences of changing the past could be horrific.
(NOT A BOOK READER BUT I DON'T CARE ABOUT "SPOILERS".)
(NOT A BOOK READER BUT I DON'T CARE ABOUT "SPOILERS".)
