Jon Snow may know nothing, but did you know that Kit Harington—the actor who plays him—is related to the guy who created the first flush toilet? It's true! As is the fact that one of Game of Thrones's most notorious villains was actually almost cast as the heroic, straight-and-narrow Jon Snow. You're probably wondering: Which notorious villain? Well, you'll just have to watch and see.

To help you count down the days until Game of Thrones is finally back, Mental Floss editor-in-chief Erin McCarthy—First of Her Name, Protector of Facts, and Mother of Cats—is dishing on some of the show's most surprising behind-the-scenes facts in this week's all-new edition of The List Show. You can watch the full episode below.

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