9 Years Later, 'Chicago P.D.' Still Hasn't Recovered From Its Most Devastating Loss

The Intelligence Unit of the Chicago Police Department's 21st District, the focus of NBC's long-running Chicago P.D., has its share of characters that have been with the show from the beginning, like Sergeant Hank Voight (Jason Beghe), who has led the show for 13 seasons. The show wouldn't be what it is today without the romance between Kim Burgess (Marina Squerciati) and Adam Ruzek (Patrick John Flueger), or LaRoyce Hawkins' reliable Officer Kevin Atwater.