I had to look her up and WOW. Why wasn't this part of the show?
EW has an excerpt from an upcoming book called
Fire Cannot Kill a Dragon, which follows the behind-the-scenes details of
Game of Thrones, and Benioff explained that “there was never really much debate” about including Lady Stoneheart in the show. He acknowledges that there’s “that one great scene” of her in the books, and Weiss agrees. “
That was the only debate,” he said. “The scene where she first shows up is one of the best ‘holy s—‘ moments in the books.”
But there are three reasons they ultimately decided not to include her. “Part of the reason we didn’t want to put it in had to do with things coming up in George’s books that we don’t want to spoil [by discussing them],” Benioff said.
Second, the showrunners feared that including Stoneheart when Jon Snow’s resurrection was coming up might be leaning a bit too much on the resurrection angle. “We knew we had Jon Snow’s resurrection coming up,” Benioff said. “Too many resurrections start to diminish the impact of characters dying. We wanted to keep our powder dry for that.”
And finally, actress
Michelle Fairley gave such a powerful, stunning performance during the Red Wedding episode, breaking hearts with her primal screams and her matter-of-fact assassination in the final seconds, that the showrunners didn’t want to take away from that memorable final impression. “Catelyn’s last moment was so fantastic, and Michelle is such a great actress, to bring her back as a zombie who doesn’t speak felt like diminishing returns.”