NBC’s One Chicago is airing its first crossover in five years tonight. Here’s how to watch the epic event featuring "Chicago Fire," 'Chicago Med," and "Chicago P.D.."

T he hours are counting down until the three shows of One Chicago come together for the very first crossover since 2019, and the event in the 2025 TV schedule is going to need all

One Chicago has a lot of characters and storylines to keep track of. It would be a disservice to the flow of a good crossover is every single person was accounted for, which means that some of them are going to have to sacrifice screen time for the greater good.