Dizi Adı: Chicago Fire
Bölüm Adı: A Dark Day
Sezon/Bölüm: 2. Sezon 20. Bölüm
Yayın Tarihi: 29 Nis. 2014

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.