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.."

One Chicago has once again shown why it's one of the most beloved franchises on television. The recent crossover event, which took place on Wednesday, January 29 on NBC, drew in millions of viewers, setting audience records for the season.

For the first time in five years, “Chicago Med,” “Chicago Fire” and “Chicago P.D.” are crossing over on Jan. 29. Here's how to watch the episodes and the order they're in.

P.D.' showrunner Gwen Sigan promises 'some really fun character pairings between all three shows that are unexpected.'

NBC has a short break on the schedule this month. The shows are taking some time off after the new Chicago Med, Chicago Fire, and Chicago P.D. episodes on February 5. Luckily, it appears that it’s just a one-week hole in the schedule,