The family is under the impression that Tara’s parents, Bev and Frank, are visiting to celebrate Charmaine’s birthday but when Frank approaches Max about taking the kids to live with them, Max does everything he can to prevent Tara from switching. At the party that night, Tara learns of her parents’ plan and is hurt that they think she is an unfit parent. Sweeping her feelings under the rug, she remains calm however, later that evening, Max wakes to find something that changes everything.

Tara decides to check into an in-patient facility that specializes in dissociation. There, Tara meets a new doctor, Dr. Holden, a charismatic expert, who pushes her to recover lost memories. The facility has support groups for significant others too, but Max is wary. As Tara tries hard to delve into her past, her alters are resistant to allowing the truth to surface, and Max learns he’ll have to be stronger than ever to help Tara take the next step in her recovery.

With Max and Dr. Holden’s help, Tara meets face-to-face with an important person from her past. This meeting, while difficult, leaves Tara feeling conciliatory and expansive. Marshall finally reconciles with Tara and gives her his full support. The family, now reunited for the first time since Tara checked into the hospital, decides to partake in a family tradition – bowling but as Tara looks around at her family, she realizes she’s not who she is in spite of her alters, but BECAUSE of them.

Tara sets out to find a new therapist as Max struggles to come to terms with Buck’s affair. Marshall and Courtney take their relationship to the next level. Tara and Max disapprove of Kate’s friendship with Lynda. Charmaine tells the family some big news. A new alternate personality is born.

An upcoming visit from a social worker has its effect on Max. Disapproving Kate's friendship with Lynda, Tara interferes while Neil learns that Charmaine is pregnant.

Her psychology professor humiliates Tara when she transitions in his class. Meanwhile, Kate considers giving English lessons in Japan and Max gets a business offer.

A new alter comes to light that put Charmaine's new baby at risk. Soon later, Alice visits Dr. Hattaras and intrigues him in Tara's case again. Kate, Max and Marshall fly to New York where they get to meet Kate's new friend Evan and his son.

Tara re-emerges but the task now is to repair broken family relationships, particularly with Marshall who is fed up with it all. Rather than go into a local mental health facility, she decides to follow Dr. Hatteras' advice and see a specialist in Boston. Neil and Charmaine are moving to Houston and offer to take Marshall with them. Kate receives an offer to move to St. Louis. As a new family dynamic emerges, everyone contemplates and wonders what the future may hold.