3. He Is The One Who Knocks
"A guy opens his door and gets shot, and you think that of me? No...I am the one who knocks." After several instances of bumbling through thin lies, playing the victim and making excuses, it is in "Cornered", the sixth episode of season four, that Walt finally takes off the kid gloves with Skyler and lets her see what he has become. Skyler, who is at this point aware of Walt's extracurricular activities, still believes that he is merely a naive chemistry teacher who is in over his head. This triggers Walt's dark side as he explains to her that he is not in danger because he is the danger. Walt's speech to Skyler is delivered with such unflinching conviction that it becomes clear that Skyler understands that Walt is no longer the man she once knew and loved. During the first few seasons, Walt gradually embraces what he becomes but always kept up a front for his family. Once he pulls back the curtain in front of his wife, there is no turning back.