Chicago Fire (2012)

S02E20 A Dark Day (I)

Lt. Casey and Dawson step up to assist with a charity run at Chicago Medical, but their plans are thrown into disarray when a huge explosion rocks the city. With one of their team members unaccounted for in the aftermath, the firehouse faces its biggest challenge yet. The crossover carries on in Chicago P.D. S01E12 at 8:30 PM (II).