Akalitus forgets to hire an escort for a psych patient who then lays waste to the pharmacy; Frank cancels a lunch date with Jackie; Zoey hears Coop and Carrie having sex; Jackie worries about Frank when she learns that a cop has been shot.

Kevin demands full custody. A bus crash patient returns after contracting sepsis. Coop threatens to quit.

It's Jackie's one year anniversary of sobriety and she and Frank fight about their relationship. Zoey acts very professional and rigid around Prentiss after their intimate evening. Carrie's peer review does not go well. Grace has a breakdown about Jackie. Jackie takes something she shouldn't have.

Picking up with her arrest, Jackie suffers through detox.

While Cruz is in care, Jackie goes over his head to get the ER under control, resulting in her dismissal from All Saints for insubordination. Jackie pulls Grace out of Catholic school. O'Hara goes into labour and Jackie returns to All Saints in spite of Cruz. Charlie arrives at the ER and Cruz asks Jackie to help him save Charlie's life.

Coop gets a surprise. Jackie hits the road. Season finale.

Kevin interrupts Jackie and Frank's night. Akalitus' blood results are in and her memory loss is a result of a medication she's been taking. Zoey helps Prentiss organize his disaster of an office. Meanwhile, Jackie is convinced that Grace is sneaking behind her back to see Danny, but Grace assures her they broke up. Frank urges Jackie to work on her issues - so she attends an AA meeting.

In the season finale, Jackie returns to All Saints where she must confront everyone.

Jackie reluctantly attends Kevin's wedding. Carrie makes demands on Coop.

Jackie and Grace recover from their nights of indiscretion; Carrie uses flashcards to strengthen her skills.

Jackie and Frank have sex for the first time and he tells her he loves her. Akalitus has an extra spring in her step. Coop wants to take his mentoring of Carrie to the next level. Kevin and Grace show up at the hospital after Kevin finds a bag of pills in Grace's bag.

Jackie breaks up with Frank and tries to separate herself from the people closest to her so she can keep using drugs. Meanwhile, Carrie forgets Coop's 40th birthday; the DEA investigation intensifies; and Zoey decides to become a nurse practitioner.

Kevin invites Jackie to a midnight rendezvous in order to give her a new wedding ring; the comatose movie critic wakes up but his tastes have radically changed.

Jackie covers for Cruz when he has a panic attack; Zoey surveys her coworkers for the best ways to conduct a breakup; Akalitus enlists the staff in an elaborate charade when her mentor is admitted with dementia.

Things get out of control in the emergency room due to the recent firings and an overflow of patients who have been diverted from another hospital, causing Cruz to suffer a pulmonary episode and Jackie to step in. At home, a rebellious Grace refuses to go to class unless Jackie transfers her to public school.

Jackie is caught off-guard when a nurse (Judith Ivey) she used to work with, who is dying of lung cancer, asks Jackie to help end her life. Meanwhile, Coop’s mother (Blythe Danner) is admitted with a gall bladder attack. We learn that he is the only son of lesbians…a fact that delights Jackie and O’Hara.

When HR demands urine samples from all the nurses, Jackie tries to avoid it as long as possible as well as her husband, who seems to have found out about her affair with Eddie.

When Cruz learns about Jackie's rehab, he takes revenge on coworkers who have been covering up her drug problems. Meanwhile, Eddie is deposed by Kevin's lawyer; a dumped Lenny decides to take off for Europe; and Coop accompanies O'Hara to her ob-gyn appointment.

Jackie's fake identity is compromised when it's learned that Carrie's DEA number has been stolen by a woman named Nancy Wood. Meanwhile, Jackie worries about her dwindling bank account and lack of pills; and Prentiss gives Zoey a shocking message.

After their custody meeting, Jackie rear-ends Kevin and wakes up as a patient in her own ER. Kevin accuses her of using. Coop begins covering for Carrie and taking on a lot more work. When Carrie checks on Jackie, she writes her a prescription for Oxy, unaware she's an addict. The most unlikely person asks Jackie out on a date.

A heavily medicated Jane Doe is brought into the ER and Jackie tasks Zoey with finding out who she is. Coop invites Carrie to dinner. Jackie faces conflict with both her daughters - Fiona has been acting out in class while Grace sneaks around the city with her older boyfriend.

Jackie is nervous about her date with Frank, so Zoey and Thor help her get ready and Eddie offers some friendly pointers. Prentiss misdiagnoses an injured dancer, but Akalitus and Coop catch his mistake before the patient leaves. Mike Cruz calls Jackie in a moment of need.

Jackie is ambushed by Antoinette. Coop's dream finally comes true.

Jackie gets inventive, setting her sights on returning to All Saints.

Jackie's back at All Saints - but back to square one in a new role.