Nora

Although Nora is initially against finding Ryan, she later changes her mind and goes to meet Ryan and invites him to stay with her. However, it is made apparent later in the season that Ryan may have had ulterior motives for agreeing with Nora's request. He also causes problems between Justin and Rebecca after developing feelings for Rebecca and encouraging her distrust in Justin.

Nora also decides to start a nonprofit center for families of patients with illnesses and becomes attracted to her architect, Roger. The two begin to see each other; however, things become complicated when Nora discovers Roger is married, but he and his wife share an open relationship. After trying to feel comfortable in this modern relationship, Nora tells Roger that she can no longer be with him and that he should go back to his wife.

Sarah

Sarah is having trouble finding work as a single mother after leaving Ojai, while her decision to leave the family business has created uneasy feelings within the family, especially with Tommy. Eventually, she decides to risk putting her money into helping 'Greenatopia' a small internet business company which two young, recent college graduates run out of their apartment. After Tommy disappears and Ojai is put in jeopardy, Sarah eventually goes back to the family business and must learn to work alongside Holly. She also faces new problems as her daughter, Paige, begins to grow up.

Kitty & Robert

Kitty and Robert move forward in their decision to adopt a child, while at the same time Robert has secretly decided to run for governor. Kitty writes a tell-all book about her time in politics and working for Robert, and agrees that she can no longer work for him. Robert has a heart attack the same day their new son, Evan, is born, leaving Kitty to take care of them both and causing a rift in their marriage. Kitty becomes close to a single dad, Alec, whom she meets in the park. However, after a near car accident leaves Kitty and Alec with similar wounds, Robert realizes what is happening. He tells Alec to stay away from his wife and Kitty that she must make a choice. Although Kitty decides to stay with her husband, their relationship is strained for the rest of the season.

Kevin & Scotty

Kevin accepts a job offer from Robert as lawyer and press secretary after he was passed over for partner in the prestigious law firm he worked for. As well as trying to handle his new job, Kevin must adjust to married life with new husband Scotty, who frequently feels caught in the middle of troubles between Robert and his sister Kitty, whom he misleads at Robert's request.

Justin & Rebecca

Rebecca and Justin struggle to begin a romantic relationship, as they adjust from thinking they were family and as they try to keep the feud between their families from affecting them. Justin finally decides his path in life and applies to medical school. After a fight with Justin, Rebecca flies to New York and meets up with David. After spending some time together, David surprises Rebecca at the airport and tells her he has decided to join her on the same flight back to LA. Holly and David decide to get back together and be a family.

After a brief separation, Justin and Rebecca get back together and become engaged at the end of the season.

Tommy & Julia

After driving Sarah and Saul from Ojai, Tommy decides it's time to get rid of Holly but engages in an illegal transaction to do so. Once he is discovered, Tommy flees to avoid going to prison. After spending time waiting for him to return, Julia leaves with Elizabeth to start a new job in Seattle. The Walkers go to Mexico to find Tommy at the end of the season but he decides to stay as he's in a good place and helping people. The family says goodbye and leaves him in Mexico in the final moments of the season.