Plot summary
Nancy, pretending to use Celia as a partner, convinces Guillermo to spare Celia's life. Guillermo makes Nancy the manager of a maternity store along the US/Mexico border. Silas moves his plants into the house, and he and Shane disturb a bee colony in the process. Andy liberates himself and a group of immigrants by shooting their coyote. Over dinner, Nancy acknowledges Andy's contribution to the Botwin family, recognizes that Silas is a pot grower, and apologizes to Shane for ignoring him. She also allows Celia to stay at the Ren Mar house and hires Celia for a minimum-wage job at the maternity store.
Nancy uses her knowledge of Peter to convince Till to release Celia from his service. While closing the store one night, Nancy discovers a hole in the floor of the store's backroom. It is revealed that the hole leads to a tunnel under the Mexican 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.