The first three-hour crossover in more than five years unites the crews from 'Chicago Fire,' 'Chicago P.D.' and 'Chicago Med.'

The following reveals major plot points from tonight’s NBC’s One Chicago crossover. NBC’s Chicago Med, Chicago Fire and Chicago P.D. came together for an epic crossover event taking the franchise to the next level.

What did you think of the epic One Chicago crossover "In the Trenches"? Read our full review of the three-hour spectacle now.

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.

There's an explosion near a government building, which causes the ensemble casts of all three One Chicago shows to arrive on the scene. There are injured and trapped victims all a