Frankie McGuire, one of the IRA's deadliest assassins, draws an American family into the crossfire of terrorism. But when he is sent to the U.S. to buy weapons, Frankie is housed with the family of Tom O'Meara, a New York cop who knows nothing about Frankie's real identity. Their surprising friendship, and Tom's growing suspicions, forces Frankie to choose between the promise of peace or a lifetime of murder.

A renegade FBI agent sparks an explosive mob war between gangster crime lords Legs Diamond and Dutch Schultz.

In cases ripped from the headlines, police investigate serious and often deadly crimes, weighing the evidence and questioning the suspects until someone is taken into custody. The district attorney's office then builds a case to convict the perpetrator by proving the person guilty beyond a reasonable doubt. Working together, these expert teams navigate all sides of the complex criminal justice system to make New York a safer place.