|Remember the Devil|
|Season 4, Episode 17|
|Airdate||March 22, 2017|
|Written by||Mike Weiss|
|Directed by||Rohn Schmidt|
Little Bit of Light
Remember the Devil is the seventeenth episode of the fourth season and the 78th overall episode of Chicago P.D.
The Intelligence unit investigates a woman being held captive in a shipping container who refuses to help find the suspect involved. When a video goes viral, the team realizes that there is a second hostage, and they race against time to find her Meanwhile an ex-girlfriend of Halstead's turns up in Chicago and drops the bombshell that they are still married, and Olinsky returns to work following his daughter's death.
- Jason Beghe as Sergeant Hank Voight
- Jon Seda as Detective Antonio Dawson
- Sophia Bush as Detective Erin lindsay
- Jesse Lee Soffer as Detective Jay Halstead
- Patrick John Flueger as Officer Adam Ruzek
- Marina Squerciati as Officer Kim Burgess
- LaRoyce Hawkins as Officer Kevin Atwater
- Elias Koteas as Detective Alvin Olinsky
- Amy Morton as Desk Sergeant Trudy Platt
- Laura Slade Wiggins as Juliana Parks
- Marceline Hugot as Geraldine Crane
- Stephanie Fantauzzi as Abby McSweeney
- Marcus Choi as Daniel Jung
- Conor Woods as Sam Driscoll
- Sam Pearson as Marcus Walker
- Andrew L. Saenz as Anthony Ochoa
- Celeste Cooper as Medical Examiner
- Dylan Jost as Austin Forchette
- Jillian Mitchell as Shanee Wallis
- Eric Lynch as Officer Dichter
- Cesar Jaime as Paramedic Cesar
Ruzek: Well, I'm confused. Was the husband the mastermind or was it her the whole time?
Olinsky: Kid, what are you looking for? They can tell you all day long why they killed someone, you're still not going to sleep any easier.
Ruzek: Are they cool?
Atwater: I don't know, ask her.
Ruzek: No sir, you ask her.
Atwater: No thanks.
Olinsky: Ruzek, let's go. Let's see if she can enlighten us on this mystery buyer.
Burgess: C'mon, did I do something wrong?
Olinsky: No, you're eating. It's cold out.
Ruzek: I'm eating too.
Olinsky: But I don't care about that.
Burgess: Zip up!
Halstead: I'll meet you inside.
Lindsay: What, are you signing autographs?
Halstead: I'll explain later. I'll meet you inside.
Platt: Hey Alvin?
Platt: If you ever want to not talk about it, I'm your gal, okay?