Blow-up (Season One, Episode Six: "Crazy Handful of Nothin'")
Sometimes a high point can be a low point, too. Take Walt's initial confrontation with Tuco, the meth-addled psychopath who beat Jesse to a pulp before stealing his money and drugs. To the world, it looks like a daring daylight raid on the enemy compound, featuring the debut of Walt's hat-wearing Heisenberg alter ego and a don't-you-know-I'm-loco use of explosives. Walt certainly sees it as a victory, growling like a triumphant predator over a fresh kill and pounding the wheel of his car in celebration as hundred-dollar bills flutter all around him. But a win for Heisenberg is a loss for the man Walt used to be, and his sheer enjoyment of coming out on top is proof that something very bad inside him has been waiting a lifetime to get out.