Warning: major spoilers are ahead for NBC's latest One Chicago crossover in the 2026 TV schedule, called "Reckoning" and available streaming now with a Peacock subscription.
One Chicago always raises the stakes for crossover events, which has meant uniting the heroes of Chicago Fire, Chicago P.D., and Chicago Med for a possible city-wide infection, an explosion so big that it freaked out the locals in real life, and – as of 2026 – a passenger jet bringing a deadly chemical to the Windy City and the clock ticking until many more people would die.
