“It's very hard to keep the cast quiet, because when you're in Spain you must eat and drink, and so we brought in a few ringers. We have The Waif coming in because so many people think that Arya is dead and The Waif killed her. We have Jaqen, who's also another House of Black and White character. And we have the Night King here.” | Game of Thrones: The Last Watch
Source: faye-marsay