The police procedural series that premiered in 2014 as a spin-off of Chicago Fire was Chicago P.D. The NBC drama premiered on January 8, 2014, and became the second television series in producer Dick Wolf’s Chicago franchise.
The series centers on the fictional 21st District of the Chicago Police Department. Its stories follow both uniformed patrol officers and the elite Intelligence Unit as they investigate serious crimes across the city. Jason Beghe plays Sergeant Hank Voight, the central leader of the Intelligence Unit for much of the series.
Chicago P.D. was introduced through a backdoor pilot in the second season of Chicago Fire. The two shows then continued to share characters and crossover storylines. Chicago P.D. also helped establish the wider One Chicago universe, which later included Chicago Med and the short-lived Chicago Justice. A common mix-up is identifying Chicago Med as the first spin-off, but Chicago P.D. premiered earlier.