Kitty Walker returns to her family home in California after having little to no contact with her mother, Nora, in nearly three years. Meanwhile, William Walker takes Sarah under his wing in the successful family business, but she soon uncovers some financial discrepancies that could damage the Walkers' way of life forever.

After the death of the family patriarch, the reading of William Walker's will shakes the Walker family to the point where the family is nearly torn apart.

William Walker's hidden indiscretions are made public. Nora reveals to the Walker family that she's not as naive as her family thinks she is. Meanwhile, each of the Walker siblings wrestle with secrets of their own.

Kitty finds herself forced to choose between the two men in her life as Justin finds that his new job entails more than he bargained for. Meanwhile, Sarah and Joe face their greatest parenting challenge yet when Paige is hospitalized.

Nora goes on a date with a younger man, but their date is interrupted by several surprises, one of which leads to an awkward double date.

The personal, financial, and business struggles that the Walker family are undergoing end up exposed to the world in an embarrassing way. The Walker family have to come together to deal with their exposure.

Kitty and Warren's weekend away ends up not being much of a vacation. Meanwhile, when Tommy and Julia realize that they are unable to have children, they discuss other ways of having children.

The Walker family must deal with the devastating news that Justin received a letter from the Army telling him that he is being shipped back to Iraq. As Justin and the Walkers attempt to cope with the realization that Justin will be going back to war, Kitty stumbles into an opportunity that could keep Justin out of Iraq, but jeopardize her career.

Sarah, Kevin and Thomas head out on an ill-fated road trip that ends up bringing to light more shocking information surrounding William Walker's secret life. Meanwhile, Kitty interviews Senator McCallister and Justin admits to why he joined the service after returning home from a hospital stay.

Sarah, Tommy, and Saul try to get their hands on some money to save the family business, but in doing so the trio makes a huge mistake. Meanwhile, Nora goes over the top in holiday decorating and in holiday cheer to compensate for all of the loss the Walker family has endured during the year. Elsewhere, Kevin and Justin go up against the U.S. Army in order to keep Justin home.

The Walker family unites for Justin's Family Day at rehab. However, it turns out the Walkers need more therapy than Justin. Meanwhile, Sarah and Joe butt heads over how best to discipline Gabe after he is caught stealing alcohol. Elsewhere, Nora tries to help at the company, but only causes more grief; and Kitty debates whether or not to work for Senator McCallister.

Kevin falls head-over-heals for a soap opera actor, but isn't sure whether or not the feelings are mutual. Meanwhile, Nora and Kitty attend a matchmaker's presentation.

The family throws a party to celebrate Nora's 60th birthday. But chaos ensues when her mother ruins the surprise, part of the family comes down with the flu, and a video tribute doesn't go as expected.

It's Valentine's Day and love is in the air, making it hard for Kitty and Senator McCallister to resist each other. Meanwhile, Kevin finds that he has more companionship than he had planned. Elsewhere, Nora has Valentine's dinner with a friend, but their night together could land her in hot water.

Sarah and Joe decide to get help with the mounting tension in their marriage by seeing a therapist. The rumors and grumblings within McCallister's staff, as well as an office poll, force Kitty to rethink her relationship with the Senator. Meanwhile, Tommy runs into a distant relative and Julia learns of a surprise addition to the Walker family.

When it is revealed that William Walker and Holly Harper had an illegitimate daughter, Rebecca, the ramifications shake the Walker family.

Trying to get the family back to normal, Nora decides to invite her deceased husband's illegitimate love child, Rebecca, to a family dinner. Later, Nora has a romantic encounter with a college professor. Meanwhile, Senator McCallister gives Kitty a surprise introduction that leads Kitty and the Senator to rethink their relationship.

Nora's love life begins to look up when her intelligent, charming professor asks her to a faculty event. Kitty is sent to Senator McCallister's hometown to interview people who knew the Senator, including his high school sweetheart, and Sarah tags along for a weekend away. Meanwhile, Chad is able to come to grips with his sexuality -- at Kevin's expense -- and Justin steps up as an older brother in order to protect his half-sister, Rebecca.

The Walker family goes head to head with long-time rivals, the Jones family, for game night rematch. Rebecca is invited to play as a Walker and during the game, the Walkers begin to bond with her as a sister. Meanwhile, Kitty introduces Kevin to Senator McCallister's brother, Jason, but soon regrets doing so.

Nora shifts between elation and reluctance when asked to go on a date with Mark, her professor, especially with the unique way he asked her out and her realization that Mark often takes dates to the restaurant he takes her to. Meanwhile, Sarah has a tough time dealing with her husband's alleged cheating, and Kitty and Robert reach an impasse following a tragic accident.

The family comes together for the opening of Tommy and Holly's newest business venture -- a vineyard. Nora and Mark's relationship continues to grow, but Mark makes a potentially devastating mistake when he kisses Holly.

Tommy and Julia have to make the hardest decision of their lives concerning their newborn twins. Meanwhile, Sarah and Joe face the reality of their broken marriage. Elsewhere, Justin prepares to return to Iraq and finds help facing the upcoming return in an unlikely person.

As the day quickly approaches when Justin has to return to active duty, he prepares himself to go back to the army by reaching out to each of his family members. Meanwhile, Nora puts together an engagement party for Kitty and Kitty announces that she'll be moving out. Lastly, more about Saul's secret romantic life is exposed; Sarah attempts to deal with the problems in her marriage; and the McCallister family and Walker family come together.