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

NBC finally released the synopses for the upcoming One Chicago crossover episodes. Wednesday, January 29, will be an exciting night for Chicago Fire, Chicago Med, and Chicago P.D. As a reminder, the night begins with a new episode of Chicago Fire in a new time slot.

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.