At the end of last year, we told you that English actor Ian McShane had been cast in the next season of Game of Thrones.
He didn't say much, but what he did say could have huge ramifications on the show:
And if that didn't mean much to you, maybe this will:
The evidence for this theory – known as the Gravedigger theory – can be examined in much more detail in this video:
And you can see Ian McShane's full explanation of his role below: