CRAZY HOLLY THEORY
Is it possible that Holly isn't Walts? I mean it could be that Holly is Ted's daughter. Afterall, it seems that the series is going to end with Walt doing something hanus to his family. There have been numerous instances of foreshadowing both the death of Holly and Skylar. Maybe Walt finds out Holly is Teds child kills Skylar, Holly, Walter Jr. and then goes after Hank. Breaking Bad is a tragedy therefore I think something sick and twisted is going to happen, especially when it comes to Walt hurting his family.