Michael Patrick Thornton

Holmes' former protégé, Kitty Winter, warns him of a killer who is eliminating everyone involved with a case they worked on together in London. Watson discovers that Kitty has a life changing secret.

The doctors venture into controversial territory when an unexpected new hire at Pacific Wellcare causes Naomi to struggle with the idea of genetically designing babies. Meanwhile, Violet decides to try electric shock therapy on a patient.

Sam convinces Violet to help plan Maya's wedding when Naomi refuses to take part, tensions between Addison and Sam rise.

A husband's decision to pull the plug on his pregnant wife is overruled by a judge, forcing the hospital to keep her on life support until the fetuses she is carrying as a surrogate are able to survive.

When famed neurosurgeon Dr Ginsberg and her team pay a visit to St Ambrose to save the life of Kayla, Addison is shocked to see Derek's younger sister on the team.

Addison, Amelia and Fife try to save Maya and her unborn child, Sam makes a grim discovery and Cooper makes a valiant effort with Charlotte. Later, an unexpected death leaves everyone stunned.