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.."

The crossover starts at 8 p.m. with "Chicago Fire" followed by "Chicago Med" at 9 p.m. and "Chicago P.D." at 10 p.m.

The highly anticipated crossover event for the One Chicago shows arrives Wednesday, January 29. This is the first crossover since 2019 and fans are excited to see what happens when the first responders come together to save the city from another huge emergency. However, there's a slight schedule change to be aware of ahead of the crossover event.

T he One Chicago universe is about to experience an unprecedented crossover event, promising to be the most ambitious in the franchise's history. For the first time, on January 29

It's the One Chicago crossover, and all signs point to it being the biggest one yet. There is an unprecedented level of integration in this 2025 event, in terms of combining characters from different shows,

LaRoyce Hawkins of "Chicago PD," "Chicago Fire's" Miranda Rae Mayo, and Darren Barnet from "Chicago Med" talk about the first Wednesday night "One Chicago" crossover event in more than five years. The casts of all three shows will combine for a full three hours of pulse-pounding prime time action.