I just found out Chicago PD has a cool connection to other NBC series Hill Street Blues

Hill Street Blues aired on NBC in the '80s, but the procedural has a cool connection to Chicago P.D. that I never knew about.
Yahoo

One Chicago Sets Fire, Med, PD Crossover Release Date & Synopsis

NBC is gearing up to merge its three Chicago dramas for another crossover episode. It will bring together Chicago Fire, Chicago P.D., and Chicago Med for a single, high-stakes storyline. The franchise ...
collider

Two 'Chicago P.D.' Favorites Will Return for Upcoming One Chicago Crossover Event

Makuochi Echebiri is a News Writer for Collider. He has been interested in creative writing from as far back as high school, and he would consume pretty much anything that’s film or TV. However, his ...
Variety

‘Chicago Fire,’ ‘Med’ and ‘P.D.’ Set Crossover Episodes on NBC in March

NBC has set a crossover event between the three series in its “One Chicago” franchise: “Chicago Fire,” “Chicago Med” and “Chicago P.D.“ On March 4, the “One Chicago” series will air back-to-back ...
AOL

One Chicago Boss on Why [Spoiler] Had To Die in Crossover Episode

The 2026 One Chicago crossover event between Chicago Med, Chicago Fire, and Chicago PDsaw several crucial developments take place across the three dramas, including the unfortunate demise of a ...
The Cheat Sheet

NBC Renews ‘Chicago Fire,’ ‘Med,’ and ‘PD’ Following Successful Crossover Event

“We’re not going anywhere! One Chicago returns this fall on @NBC and Peacock,” the official One Chicago Instagram account wrote alongside a video of some of the cast reacting to the renewal news. The ...