America's Meth Kitchen. Walt and Jesse are cleaning up from the latest cook. Walt asks for a hand within the tank, and when their heads are both submerged in the tank, Walt asks for a progress report on the whole "murder Gus" mission. Jesse lies that he hasn't seen him. They go back to cleaning, but Walt's got a distrustful look on his face.
At the DEA offices, Hank and Marie arrive and warmly greet Agent Gomez, Hank's old partner. Hank, tellingly, is taking great pains to walk with the aid of merely a cane, not the rolly-walker he had earlier. He's profane and jocular with Gomez as usual -- working overtime to appear as the same old Hank. Back in a conference room, Hank and Gomez are met by Agent Merkert, who is effusive about Hank's road to recovery. Hank congratulates Gomie on his promotion, but soon it's time to get down to business. He presents the Gale Boetticher case to the two men, stressing the fact that this "nerd's nerd" is also a world-class meth cook. Connects Gale to the blue meth and says he thinks he's Heisenberg's cook (thanks, Walt!). He shows them the Pollos wrapper, and says he tracked down the number scrawled on it and connected it to the product number for an industrial-strength air-filtration system that costs about 300 grand. He tracked the system down and learned it was delivered to Gale, but no record of payment. Still digging, he found that the manufacturing concern that made the system, Madrigal Electromotive, is highly diversified, and one of those diverse holdings is a humble local restaurant chain: Los Pollos Hermanos. Now he mentions the incongruity of finding a fast-food wrapper at the vegan nerd's house. What if, instead of a meal, Gale was there for a meeting? Hank finally arrives at his hypothesis -- he points to a photo on the wall of this very conference room: Agent Merkert shaking hands with one Gustavo Fring. Awfully convenient theatrics, Hank, but I like it.
Hank asks: what do they really know of Gus? He's got the money to run a meth business of Heisenberg's size; maybe he's got the connections too? The friend-of-law-enforcement thing is a good cover, after all. Merkert thinks he's really reaching, and Gomez is like, if the meeting was at KFC, you wouldn't suspect Col. Sanders, right? Then Hank does this hilarious Columbo thing, where he's like, "I guess you're right. What was I thinking? ...Only, one more thing -- why are Gustavo Fring's prints found in Gale's crime-scene apartment?" BOOM. Y'all just got HANKED!