Bronwen Hughes Summary: Walt shaves his head due to chemotherapy side effects. He and Jesse attempt to sell their product to Tuco, but the deal goes south when Tuco assaults Jesse. Walt returns to Tuco’s office (using the alias "Heisenberg") with a fulminated mercury explosive disguised as meth. He blows up Tuco’s office to intimidate him into paying. Key Moment: The "This is not meth" explosion. Memorable Quote: "You got the first part right, but the second part... I’m gonna give you $30,000." – Tuco Salamanca