Plot summary
Nancy turns her attention back to business. Guillermo breaks the taillight on Nancy's car and sends her to Mexico to have it repaired at Cesar's garage; he also orders her to buy inhalers from a pharmacy in Tijuana. Excited to go on her first international drug trafficking run, Nancy leaves her passport in Ren Mar. The US border patrol inspects Nancy's car and confiscates the inhalers, but they don't find any other drugs. It is revealed that Nancy had completed a dry run; Cesar did not put drugs in the car, though Guillermo did record Nancy's trip. Doug and Isabelle visit a distraught Celia in jail. Silas grows his strain of MILF weed in Andy's van. Shane tends to Bubbie, who regains consciousness and asks Lenny to kill her. Till sees a picture of Guillermo and Nancy standing together at the border.
Credits
Adapted from Wikipedia contributors, Weeds season 4. Exact episode table narrative; paragraph formatting adjusted; reference markers, illustrations, cast notes and title-reference commentary omitted.