Roger Rathburn

Kitty, Sherlock's new apprentice, lets jealousy get the better of her when Holmes and Watson investigate a double homicide.

Newberg's step-daughter turns up at the hospital with a condition directly related to her relationship woes, and Divya tries to bring romance into her relationship with Raj.

Claire asks a dialect expert to interview Trevor, hoping to find out something about his background from his speech patterns. Also, Trevor transforms a masseuse from Queens into a cultured lady for her sophisticated uptown boyfriend.