Sep. 20, 1999
Returning Series
60 min.
NBC TV Network

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Law & Order: Special Victims Unit » Season 18
Law & Order: Special Victims Unit - 18x15 Know It All

18x15 Know It All

3.75/5 (4 votes)
First Aired: Apr. 05, 2017 on NBC
Summary: A man under investigation for rape and murder threatens to expose the secrets of those working the case.

Watch Episode On:

- VUDU (purchase)
- Verizon On Demand (purchase)
- Amazon (purchase)
- NBC (tv_everywhere)

Series Main Characters


Guest Stars

Olivia Benson played by Mariska Hargitay
Amanda Rollins played by Kelli Giddish
Odafin Tutuola played by Ice-T
Dominick Carisi Jr. played by Peter Scanavino
Rafael Barba played by Raúl Esparza
David Willard played by Chris Diamantopoulos
Det. Marcus Perry played by Jason Bowen (III)
Laura Knowles played by Megan Murphy

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Episode Quotes

Olivia Benson: [at a crime scene] Rollins, is it?
Amanda Rollins: It looks like it. Number four. Same victim profile. It's the same staging, same binding, same rope.
Det. Marcus Perry: And he took his trophy. Shaved a chunk from the base of the neck.
Dominick Carisi Jr.: Yeah, head trauma, no pool of blood. She wasn't killed here.
Olivia Benson: If it follows pattern, there won't be any DNA. Let's check security cameras.

Olivia Benson: Hold everybody back.
Amanda Rollins: She deserves that much.

Amanda Rollins: Let's go, guys.
Det. Marcus Perry: This is our guy, and he's early.
Dominick Carisi Jr.: Yeah, by over a week.
Olivia Benson: He's accelerating, which means it's only gonna get worse from here.
Rafael Barba: Word is Willard's attorney's already scrambling to make a deal.
Olivia Benson: Look, unless he pleads to murder, I say try the case.
Rafael Barba: Me, too, but I have no input. I'm off the case.
Olivia Benson: I'm so sorry about all of this, Rafael.
Rafael Barba: What I did was wrong, but the truth is I'd do it again. Not everything done in the dark is shameful.
Olivia Benson: So now what?
Rafael Barba: I have a meeting with the D.A. in five minutes. He'll tell me what happens next. You know, I love this job. Oh, I really do, but sometimes...
Olivia Benson: Oh, I know.
Olivia Benson: We're three days in, and we got a week and a half if he stays on pattern.
Det. Marcus Perry: I can't afford another one. COMPSTAT counts these against Homicide. I got three unsolveds over my head.
Olivia Benson: So we'll flood the streets. We're gonna flood social media, get this sketch out there. Make sure that everybody knows.


  • Goof (incorrectly regarded as a mistake): Lieutenant Benson says that the suspect has killed the victims "every two weeks for a month." To have three victims, one might assume the suspect would have needed six weeks, with a victim every two weeks. But actually, "every two weeks for a month" produces three victims, when counting the month from the date of the first victim's death to the date of the third victim's death. If the first victim is killed on the 1st, then two weeks later, on the 15th, the second victim is killed. Another two weeks later, on the 29th, the third victim is killed. Therefore, in one month, there are three victims, killed every two weeks.


  • This is Fin's first episode as a Sergeant.
  • The ending scene is the first time Benson has addressed Barba by his first name.
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