In the sixth season of this family cop drama, Frank becomes convinced that New York City is the next target for a terrorist attack. Meanwhile Frank discovers Mayor Poole has been involved in illegal activity. Danny tracks down a serial killer after finding several women dead. A journalist who is riding along with Jamie and Eddie is shot. Erin feels guilty after a man she released is arrested for killing a cop. When an NYPD officer is not indicted for shooting a teenager, the public outcry puts every cop in danger.
