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)
| Title | A Dark Day (I) |
|---|---|
| Genres | Drama |
| Release Date | 2014-04-29 |
| Episode Runtime | 00 Hours 42 Minutes |
| Season Number | 2 |
| Episode Number | 20 |
| Production Companies | Universal Television, Wolf Entertainment |
