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 lifechanging secret.

Naomi seeks Fife's help with William's experimental treatment for ALS; Violet and Amelia treat a woman with a brain tumor; Sheldon goes after Charlotte's affections.

A woman and her husband want to harvest their unborn baby's eggs; a woman threatens suicide if she tests positive for Huntington's disease; Fife returns to share his feelings with Naomi.

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.

Henry teams up with a Marine veteran to fight for legislation that helps Veterans Affairs provide better mental health care, but he encounters surprising resistance from Vice President Carlos Morejon. Also, Senator Hanson (Wentworth Miller) questions Daisy about an arrest in her past.

Cooper and Charlotte second-guess their wedding plans; an investigator visits the practice to question the doctors about Violet's case.