Tuco Salamanca drives Walt and Jesse to a remote shack in the desert where his elderly uncle Hector Salamanca, a former cartel enforcer now confined to a wheelchair and unable to speak, communicates only by ringing a bell attached to his chair. Tuco forces Walt to cook meth in the shack's crude kitchen, and Walt complies while secretly plotting to slip the ricin into Tuco's food. Jesse prepares a meal and manages to stir the ricin-laced meth into a burrito intended for Tuco. Hector, who has been watching them with sharp suspicion despite his paralysis, repeatedly rings his bell and knocks the plate off the table before Tuco can eat it. Tuco grows agitated and beats Jesse severely, dragging him outside. Walt realizes the poisoning plan has failed and begins calculating a new escape. Skyler, having not heard from Walt in over a day, calls Jesse's phone repeatedly and gets no answer. She contacts Hank in a panic, and Hank begins tracking Jesse Pinkman as a lead, discovering Jesse's car — the Monte Carlo with the CAPNCOOK license plate — parked at the compound where Tuco conducted business. Hank traces the car's registration and starts building a timeline of Jesse's movements. At the shack, Walt tells Tuco that Jesse is useless and suggests letting him go, but Tuco refuses, saying they are all going to Mexico together. Jesse, bloodied from the beating, finds a gun hidden under the porch of the shack. Tuco takes Walt outside to make him dig through the car, and Jesse emerges with the gun. A struggle erupts: Jesse shoots Tuco in the abdomen, and Tuco fires back. Walt grabs a large rock and strikes Tuco. The wounded Tuco staggers outside into the dirt road just as Hank arrives, having tracked Jesse's car and followed leads to the remote location. Hank and Tuco exchange gunfire in the open desert. Hank kills Tuco with a shot to the head. Walt and Jesse, hearing the gunfight, flee on foot into the desert before Hank can discover them. Hank, shaken but alive, calls in the shooting and does not realize his brother-in-law was ever there. Walt and Jesse separate in the desert, each making their own way back to Albuquerque on foot, knowing they must construct alibis for their disappearance before anyone connects them to Tuco's death.