Walter and Jesse escalate their operation to meet Tuco's demand for two pounds of meth weekly, but their usual pseudoephedrine supply can't support that volume. They steal methylamine from a chemical warehouse and cook in Jesse's basement during a real estate open house, producing their signature blue product. When they deliver to Tuco, he's pleased with the quality but brutally beats his associate No-Doze to death in front of them for speaking out of turn, while Skyler discovers Marie has been shoplifting expensive items.

This episode marks Walter's transition from small-scale cooking to industrial theft and production, establishing the blue meth that becomes their trademark. Walter witnesses lethal violence as a direct consequence of his business relationship with Tuco, yet continues the partnership for the money. The contrast between Wal ...