Nancy Botwin just keeps moving up the food chain. As she gets closer to the source the stakes get higher. Her fuck ups will get her more jail time and her partners are more likely to kill her. Her family is on the run after last season saw Agrestic burned to the ground. Nancy's new partner, Guillermo (Guillermo Diaz), was the arsonist, showing just how far her new associates are willing to go.
Things get more sophisticated; Nancy is now running a front and interacting with smuggling operations. Doug and Andy strike off on their own ridiculous venture. Silas takes the next step in his drug world maturation, partnering up with an older woman to sell via a store front. Shane gets in on the ground floor. Albert Brooks makes a cameo as Lenny Botwin, Nancy's father in law and new landlord.
The show stays funny with Doug and Andy's money making schemes combined with Celia absolutely losing is under pressure.