Line of Duty follows Detective Seargent Steven "Steve" Arnott (

On the streets of San Francisco a team of the Federal Bureau of Investigation's Behavioral Analysis Unit use profiling to catch some of the most horrific serial killers and unidentifiable subjects.

Based in Quantico, Virginia, the Behavioral Analysis Unit (B.A.U.) is a subsection of the F.B.I. Called in by local Police departments to assist in solving crimes of a serial and/or extremely violent nature where the perpetrator is unknown (referred to by the Unit as the unknown subject or "unsub" for short), the B.A.U. uses the controversial scientific art of profiling to track and apprehend the unsub. Profiling entails coming up with basic characteristics of the unsub and the victims (referred to as the victimology), using evidence from the case and matching that information to historic precedents and psychological analyses as a means to solve the case. Because of the nature of the work conducted by the B.A.U. - the work being time consuming and psychologically demanding - its members are fiercely loyal to the Unit and to its other members. Also because of the work's overall demanding nature, not many members of the B.A.U. have been able to maintain a happy or stable family life.

Blue Bloods follows the lives of the NYPD's First Family of Law Enforcement: the Reagans. Frank, the Police Comissioner and son of former PC Henry Reagan, must balance his duties of running the largest police force in the world and being his kids' boss. His daughter Erin is an Assistant District Attorney, son Danny is a senior detective and fellow Marine Veteran, and new Harvard Law grad turned cop, Jamie all swirl through this family drama and passionately defend their city from harm. The Irish-American family is deeply rooted in their patriotism, passion, and love of family.

This "Closer" spinoff follows cases handled by the Major Crimes division of the LA Police Department. The 7-member team is headed by Capt. Sharon Raydor, whose intellectual smarts combined with a calm, even temperament help a team of experts solve high-profile murder cases. In addition to running the show, Raydor helps guide and protect her teenage charge, a witness in a horrific crime, who finds a safe refuge among members of the major-case squad.

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