Plot summary
Nancy walks through the tunnel, but she is dragged back to the US when Cesar discovers her. The next day, she and Celia discover Ignacio, a Mexican drug-syndicate goon, guarding the tunnel. Shane tries to sell Bubbie's possessions. Rad's mom, Lisa Ferris, meets Silas and takes a liking to him. While at Imperial Beach, Doug meets and takes a liking to Maria, an undocumented immigrant trying to sneak in across the ocean border. However, she is quickly captured by the border patrol. Isabelle moves to Ren Mar with Celia. Nancy is kidnapped and meets Esteban, Guillermo's boss. He gives her a lecture and then flirts with her. Nancy later discovers that Esteban is the mayor of Tijuana.
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.