Nancy follows the tunnel in the back of the maternity shop and sees something she shouldn't at the other end. Dean takes a new job, leaving Isabelle to live with Celia. Meanwhile, Silas flirts with Lisa, and Doug falls in love with a vision of beauty who washes up on the beach.

When Nancy is denied a share of the incoming pot by Guillermo, she decides to go over his head to Esteban. Celia discovers the cheap medication at Mexican pharmacies. Silas and Lisa get intimate, while Shane discovers some shocking photos. Andy and Doug begin interviewing for their human smuggling operation.

A spontaneous date ends in near-violence for Nancy and Esteban; Silas reveals to Lisa that he grows pot, and she makes him a tempting offer; Andy and Doug smuggle their first customer across the border; Celia develops an addiction.

Despite their busy schedules, Nancy and Esteban try to find some time for each other. After finding out about Shane's fantasies and Silas's new and much older girlfriend, Nancy also has to talk to both of her sons. With their relationship going on, Lisa and Silas add some special offerings to her cheese shop.

Nancy learns that the tunnel is being used for more than drugs. Esteban puts her fears to rest as well as her nagging headache with a strong remedy. Celia's family stages an intervention in order to force her into rehab. Andy finds Maria and takes her across the border to an awaiting Doug. Silas babysits while Shane explores new territory with his two girlfriends.

Nancy must deal with the aftermath of Shane's exploits, her Ayahuasca trip, and more confrontation with Guillermo. Celia's struggles with her rehab partner, Barry, force her to find a new rehab facility. Doug and Maria's relationship quickly goes south and they both turn to Andy for help. Meanwhile, Silas's "sandwich" business has grown too big, forcing him to turn to Nancy for help.

A fed up Nancy squeals to the DEA to bust the tunnel while she plays it cool with Esteban. Embracing rehab, Celia sets out to make amends with her family. Andy succumbs to Maria's advances, and later comes clean to Doug. Shane impresses his girlfriends with his drug scoring abilities.

Nancy is visited by DEA agent Roy Till who has gone rogue and homecomer Celia moves into Nancy's garage. Meanwhile, Andy tries to access his brother's old bank account.

Nancy talks with her obstetrician about ending the pregnancy. After his teacher took his pot, Shane needs some help to get it back. Andy is still trying to get access to his late brother's bank account. Meanwhile, Silas and Doug need to see "The Wizard" to make their pot selling dreams come true.

It's six months since we last saw everyone and Nancy is in full bloom. Esteban proposes, and all seems right with the world until Nancy discovers there's another woman in Esteban's life. Andy, meanwhile, has gone on a spending spree and let himself go. Now he must come to terms with the new order of things. Celia, unhappy in her job at the mall, discovers an opportunity in the world of cosmetics. Shane spends an eye-opening day with Ignacio. Silas and Doug's medical marijuana dispensary is in full operation. But Deputy C.P. Jones continues his meddling ways.

With the arrival of new enemies, Shane and Silas needs Nancy's protection. Meanwhile, Andy plans his future with Audra, while Doug and Dean make a plan to put an end to Celia's marijuana business.

Nancy, Andy and Cesar team up to look for Esteban when he goes missing. In the meantime, Dean and Doug start their scheme of revenge against Celia, while Silas and Shane develop a need to protect their new stepsister.

Nancy learns of Esteban's fate and takes action to preserve her own. Andy makes a big change in his life. Dean, Doug and Celia find common ground. Silas helps Adelita with a disturbing medical issue.

Nancy becomes a scab labor in a Seattle hotel while Shane looks after Stevie and Doug goes back to Ren Mar

Nancy makes a deal with the concierge and Shane becomes part of a mommy group. Meanwhile, Doug is questioned by Cesar and Ignacio.

The Botwins' flight continues after a parking violation and Doug gets into a hostage situation.

Nancy brings her son back while Andy and Silas wait in a diner.