Addison treats two pregnant women who unwittingly share the same husband; Violet confronts Charlotte about her liaison with Cooper; Dell reveals a special woman in his life.

When Cooper's patient contracts measles, everyone at Oceanside Wellness must be quarantined. Meanwhile, Naomi tries to talk Addison into working with her rival, Wyatt; Violet and Pete contemplate their friends-with-benefits relationship; and Dell fights for custody of his daughter.

A disturbed pregnant patient has lost her baby, and Violet must convince her that her baby needs surgery. Meanwhile, Cooper must tell a patient he needs part of his jaw removed due to a fast-growing cancer. Dell must cope with his daughter's absence when his ex has to move for a new job Sam and Addison must hold back their feelings for two unattainable people.

As Violoet chooses between Pete and Sheldon, she must also deal wtih a grief-stricken patient. Meanwhile, Dell worries about his daughter when Heather returns to town and Naomi debates moving to Pacific Wellcare.

When Pete discovers Violet clinging to live following a violent attack from a patient, he rushes her to the hospital where Addison and Naomi work together to save her life. Meanwhile, the location of Violet's baby are still unknown.

An explosion at Dell's house lands Betsey and Heather in the hospital. everyone is pushed to the limit in trying to save their lives.

The tensions between Addison and The Captain rise even more when her mother, Bizzy, shows up and a shocking family secret is revealed.

Desperate to help his pregnant daughter, Mark (Eric Dane) follows Addison back to Oceanside Wellness, Dell and Naomi struggle to raise their children under the same roof, and Violet and Cooper heatedly disagree on how to treat a patient on.

Maya and her unborn baby are fighting for their lives on the operating table, and Addison, Amelia and Fife try everything humanly possible to save them. Meanwhile, Sam operates on an incoming crash victim and later makes a grim discovery; Cooper makes an ill-timed but valiant effort with Charlotte, and the staff’s world gets rocked by an unexpected death.

Emotions are stirred up at the practice when Dell's daughter arrives; a pregnant woman experiences chronic pain.

When Betsey returns to the ER for a second visit, the concerned Oceanside doctors start investigating the foster family. Amelia struggles to stay sober while Naomi announces a life changing decision affecting her family.

The fate of Oceanside Wellness is on the line as the doctors decide if it's time to dissolve the practice. Addison's new admirer makes an enticing offer and things hit close to home for Charlotte with her latest case.