By now, we've devoted countless hours of our lives to figuring out the eternal mystery on Pretty Little Liars [1]: who the hell is "A" [2]? We've thought over every theory, blamed every character, and looked everywhere we thought to look — except one place. You know what they say: trust no one. That's why we're asking: are you "A"? Take a look at this checklist before season five premieres on Tuesday — just to be safe. We'll take you off our suspect list after you do. Maybe.