Michael Patrick Thornton

Naomi struggles with the idea of genetically designing babies; Violet suddenly decides to try electric shock therapy on a patient.

Maya's announcement shocks Sam and Naomi; Pete challenges Fife on a patient with a cutting-edge bionic arm.

Addison's father's arrives in Los Angeles, which rattles her; after refusing to cooperate in a case involving a longtime patient, Cooper is arrested; Pete fights to keep a terminally ill patient alive long enough for him to meet his new daughter.

When a famed neurosurgeon and her team visit St. Ambrose, Addison is surprised to see Derek's younger sister on the team; Charlotte and Cooper try to figure out how to work together.

The hospital must keep a surrogate mother on life support until her fetuses are able to survive; Naomi discovers that Addison and Sam have feelings for each other.

Naomi refuses to take part in planning Maya's wedding; tensions rise between Sam and Addison; Pete and Cooper treat a teenager with a mysterious bite mark.