Chicago Fire Season 2 Episode 20
A Dark Day (I)
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)
Guest Stars
Christine Evangelista
Allison Rafferty
Sammy Sheik
Nizar
Francis Guinan
Commissioner
Jesse Lee Soffer
Jay Halstead
Jason Beghe
Hank Voight