While working a case of a nanny accused of abuse, Erin disagrees with the psychiatric consultant, Dr. Alice Dornan (Jennifer Bowles), regarding her diagnosis and punishment suggestion. Also, Eddie confronts her boss who has a personal vendetta against the commissioner and the Reagan family name; Mayor Peter Chase (Dylan Walsh) pushes Frank to make staffing changes he is skeptical about; and Danny goes undercover on a case when a woman claims to have heard someone plotting a murder