It's like, you're going through your post-Game of Thrones week minding your own business and casually reading fan theories, when all of a sudden the internet pulls a "hey there, Catelyn Stark is a zombie and she was in Sunday's episode." 😱
But let's back up. Remember the scene from Episode 7 when Arya tells Brienne of Tarth "you swore to serve both my mother's daughters?" Well Reddit noticed that right when she said that, a woman with a green dress and long red hair walked in the background. You can watch the moment in the video above, but there's also a handy GIF:
Fans of George R.R. Martin's book series will remember that Catelyn Stark came back as a zombie, a plot twist that the show seemed to move away from. So this could either be a brief homage, an indication of zombie-like things to come, or literally nothing. Either way, we will no longer be sleeping well at night.