Cut to Saul talking to Walt by an old abandoned building about Casa Tranquila, an old-folks home where Jesse says Gus took him a while back to see an old acquaintance of theirs: Tio Salamanca. Saul starts to describe Tio, with the chair and the bell, but Walt remembers. Saul relays the story about how Gus went there and taunted Tio with news of the slaughter in Mexico. Later, Gus apparently told Jesse (in a moment of mentorly closeness, guys!) that Hector murdered someone close to him once. Walt connects what few dots are left to connect: Gus and Tio are enemies. Walt thinks he can use this.
Walt pays a visit to old Casa Tranquila. He passes the Old Folks Bingo to find Tio, who does the screwed-face scowl when he sees Walt. "I know you despise me and want me dead," Walt tells him, "but I bet I know a man you hate even more. I am offering you an opportunity for revenge." Scowl sliiiightly downgraded.
After the break, Tio summons his caregiver (who's wearing some sad lime-colored pants) with that infernal bell. It seems they've worked out a system where one ring of the bell means "yes," zero rings means "no." But the y/n questions aren't doing it for Nurse LimePants, so she gets the board. The board is a grid with letters on it, and their system works like this: each line starts with a vowel. Nurse LimePants reads each vowel out, and Tio rings the bell when she gets to the correct line, then rings again when she gets to the correct letter in that line. It's a very time-consuming process, so it's a good thing he's barking monosyllabic orders and not writing his memoirs. So through this process, Tio spells out "N-E-E-D D-E-A." The nurse doesn't get it and assumes Tio needs another letter at the end of the word. Is it "dear"? Deal? She finally looks at him: "Honey, 'dea' ain't a word." Oh, LimePants.
Walt waits in a car outside the home and gets a call from an agitated Junior, who wants him to take this situation seriously and get to Hank's. And if you think Junior's agitated, try Marie, who can barely stand still. She finally gets Junior to hand her the phone, at which point she upbraids Walt for thinking a day at the car wash was more valuable than his family's peace of mind. I love Marie, have I mentioned that? Walt feebly tries to make his case, but it's not much of an argument. Marie turns to Skyler, like, "Do you have anything to add?" Skyler says helplessly that he'll get here when he gets here. Marie hangs up, and then gives Hank shit for not helping. He's not even paying attention.