Gus walks out of the room, adjusts his tie, and the camera pans to reveal half of his face has been blown off. He falls dead. Walt walks into the lab, calls Skyler, and says the words he has been waiting four years to say: "I won."
Walt lies to his family about his "gambling debts," kills two men (Krazy-8 and Emilio) in cold blood (his first murders), and establishes a shaky alliance with Tuco. By the finale, he isn't just a cancer patient; he is a survivor. But the monster has only opened one eye. Breaking Bad -Seasons 1 to 4 - Complete-