some of the american series I watch regular :-
Banshee - Lucas Hood (Antony Starr), an ex-con and master thief assumes the identity of a murdered sheriff where he continues his criminal activities. His past seems to haunt him by those he betrayed years earlier. This ex-con imposes his own brand of justice where violence erupts at every turn in the not so quiet Amish town, Banshee, Pennsylvania.
Blue bloods - Revolves around a family of New York cops.
Chicago fire - The story of firefighters in Chicago, both on a personal and professional level.
Chicago pd - Follows District 21 of the Chicago Police Department, which is made up of two distinctly different groups: the uniformed cops and the Intelligence Unit.
Crossing lines - A special crime unit investigates serialized crimes that cross over European borders and to hunt down criminals to bring them to justice. A global FBI is born.
Homeland - When Marine Nicolas Brody is hailed as a hero after he returns home from eight years of captivity in Iraq, intelligence officer Carrie Mathison is the only one who suspects that he may have been "turned".
The Blacklist - Elizabeth 'Liz' Keen, a new FBI profiler has her entire life uprooted when a mysterious criminal, Raymond Reddington, on the FBI's Top Ten Most Wanted List turns himself in and insists on speaking to her.