Walter White (Bryan Cranston) has followed a dark and meandering path over the course of the series. Initially he was an purer version of the antihero, a man driven to go against the law by his circumstances. In an era with a toppling economy and a flailing health care system, it was easy to like Walt, and to see how he might be pushed into making the choices he did. He might have been cooking meth, but it was for a cause. You could understand how he might find himself backed into that corner, and in a sense, you rooted for him, even as he was contributing to a critical emerging public health crisis. After all, it was only a little bit of meth.