Callie, Bailey and Richard present pivotal surgical cases from their pasts when Derek restores the hospital lecture series.
Jackie's back to using again, but she's doing it differently this time: maintaining a clean and sober cover, going to 12-step meetings - even finding herself a sponsor - all the while getting her drugs from the towel girl at the gym.
When Aunt Vi is the lone juror on a murder trial who believes the defendant is innocent, McCall covertly investigates the case to find proof that Vi's instincts are correct.
The hospital staff struggle to save an NYPD officer who was hit by a car on the job. Meanwhile, Kapoor and Iggy try to help a patient struggling with effects of a previous surgery.