Amy's past comes back to haunt her when a desperate father sacrifices everything to secure his daughter's heart transplant.

Amy struggles with memories during treatment of an expectant mother's puzzling illness. Her mentor Dr. Joan Ridley makes a visit to Westside.

Amy faces medical tourism challenges through a patient; TJ assists a veteran with prosthetics; Joan reveals shocking news.

An old medical proxy form causes conflict between a patient's ex and current partner. Meanwhile, Amy, Jake and new intern Hannah look into why a college student suddenly went blind.

A popular weight loss drug reveals the cracks in a couples' relationship. Two sisters face an unexpected diagnosis.

Amy treats a Chaplain who helps her reconcile with the past, while Michael is under investigation for his actions during the hostage crisis. Also, TJ returns to work and treats a prisoner and Hannah's brother shows up with a plan.

Amy and Gina help a domestic abuse victim with Jake's support. TJ, Sonya and Liz treat a social media star. Hannah and Charlie plot against Amy.

Jake defies other surgeons while fighting for a terminal patient. Amy's neurological examination triggers memories of Danny, causing her to overexert herself.

At his father's funeral, Jake processes grief and his feelings for Amy. A flashback reveals his old plans to leave Westside and why he stayed. Charlie's scheme against Amy becomes extreme.

A hospital hack coincides with three patients showing similar symptoms. Two are connected, one homeless. Michael faces marriage troubles. Sonya refuses Larsen's test suggestion. Clark discovers hack delayed diagnosis.

After a deadly hack, the FBI hunts the hacker. Sonya and T.J. help a student in need, while Amy secretly searches hospital files during a poisoning case, alarming Hannah.

Hannah learns her father is the man she remembers and assumes she's behind the hacking. The board orders an inquiry as some want Amy fired, believing Hannah blames Amy for her father's suicide. Amy may have made him quit or fired him.

Joan has Amy and Sonya evaluate each other's cases as the Chief resident competition intensifies. Amy treats a politician with a disability who has health issues. Sonya searches for answers to her patient's severe abdominal pain.

Amy and Jake treat a pregnant robbery victim with shocking results. Katie's therapist brings Michael and Amy in for a session. TJ and Sonya help Julie with a puzzling illness and surprise romance.

Amy treats a critically ill patient with a secret while processing Katie's news. Gina and Jake evaluate a poker player's mental state as Jake hides Rachel's health crisis from Amy. Sonya and TJ investigate Joan's absences. Richard returns.

Richard faces cold reception and seeks redemption while caring for an exhausted delivery driver. Sonya and TJ get Jake involved in handling Joan's sensitive matter. Amy and TJ treat a prominent malpractice attorney with unforeseen results.

Richard seeks redemption after a hostile reception, treating an exhausted delivery worker. Sonya and TJ get Jake's help with Joan's sensitive matter. Amy and TJ treat a prominent malpractice attorney, causing unforeseen issues.

Amy and Michael take Katie to college orientation. They stop at a familiar campsite to hike but find an injured man in critical condition. With no cell service in the remote area, the three must find a way to save him.