A Dark Day (I) Chicago Fire : Season 2 Episode 20

TV-14 NBC 43m int(0)

Aired: April 29th, 2014 @ 9:00 PM EST on NBC

Lt. Casey and Dawson volunteer to help at a charity run at Chicago Medical when a massive explosion sends Chicago into chaos. With one of their own missing in the blast, the firehouse is tested like never before. The crossover continues on Chicago P.D. S01E12 8:30 PM (II)