I've avoided spoilers all season and don't watch previews online (I live in the UK and have wanted to avoid any spoilers), so forgive me if this has been said or is just really stupidly obvious. I'm thinking that the explosion in the last episode will lead to the zombie apocalypse and people really knowing they exist. Obviously Natalie is dead since she's not a zombie anymore, and maybe some others, like Harley, were blown to bits. But if Harley really wanted to kill them all, a bomb would not be effective because it's not a bullet to the head. So I think the ones who aren't in a million pieces now will maybe end up just being in full-on zombie mode all the time or something, and that will lead to the real zombie apocalypse. I'm a little anxious to see the finale just because I haven't really been as into this season. (Kind of knew I wouldn't be because I wasn't crazy about how season 2 ended or just the general concept of Fillmore Graves. I'm a bit worried about season 4 now, though I am glad it was picked up...)