Multi-episode crossover events were once an annual tradition for the One Chicago world on NBC, but that changed for a few years due to production complications. After a three-parter in 2025 that was Avengers-esque in the scale of the massive Windy City's gas line explosion that needed heroes from all three shows to contain, the next event in the 2026 TV schedule could be the deadliest yet for Chicago Fire, Chicago P.D., and Chicago Med. And not too many episodes are left before the crossover!
