Few mysteries on "Game of Thrones" are as long-lasting and potentially game changing as the identity of Jon Snow's mother. But, unless you're a deep-cut fan of the books and the active online fan theories surrounding the books, perhaps you're not aware of just how deep the mystery goes.
A video from YouTube user Alt Shift X does all the heavy lifting for you. If you want to hear all about one of the oldest and most compelling theories behind Jon's parentage, all you have to do is click the video below — but be warned, you're walking into a hornet's nest of (probable) SPOILERS.
Proceed with caution:
Is your mind blown yet?