FBI Agent Kate Moretti- Rachael Leigh Cook
FBI Agent Kate Moretti (Rachael Leigh Cook) is Pierce's former student and the person responsible for recruiting him as a consultant to the FBI. Her sharp mind and intuition made her one of Pierce's star pupils. Now she uses those skills to solve crimes, and Moretti looks to Pierce for help with solving difficult cases involving psychiatric or neurological components. This season, Pierce and Moretti's mutual attraction causes friction between Moretti and the Assistant US Attorney – who also happens to be her soon-to-be ex-husband (guest star Scott Wolf).