The team is still reeling from Jimmy being shot, but now they have a witness they're hiding; under Yolanda's capable leadership, the team is given a special commission to work in all five boroughs, starting with a serial killer and sexual predator.
Chief Wryles breaks his silence and give a glimpse into his master plan, but his world goes sideways when Darius resurfaces and blackmails him; SIU has its hands full with a bizarre murder triangle involving a high-end fashion model.
The SIU's sins come back to haunt them; a highly intelligent and crusading vigilante kidnaps a team member.
Jimmy is up and about, and staying away from SIU; Argon and Han's plot unfolds; Darius and Argon continue their "business" partnership with Darius' daughter held as a bargaining chip; the team is falling apart.
Team members' personal and professional lives collide; Argon manipulates SIU to his own ends; Tess and Tarik try to hold down SIU as Yolanda becomes more erratic; Jimmy and Darius finally meet, but it can only end at gunpoint.
An elite task force tackles New York City's most complex and demanding cases.
A new detective joins the team after lending a hand on a previous case; the mayor's son is missing and SIU is brought in to solve the case quietly and quickly.
The SIU team is called in when a former Russian diplomat ends up dead, and the team members suddenly find themselves pawns in an international conspiracy involving money laundering, CIA spooks and former KGB hit men.
A new designer drug is killing kids and the team turns the city upside down looking for the dealer; lives are torn apart as the head of the Albanian mob finally discovers who took his money.
Everything comes to a head as Argon closes in on Jimmy and Darius; Jimmy starts to crack as the world closes in around him.
Jimmy Blue is shot and the team reels from shock; Tarik, Yolanda and Tessa throw themselves into solving the case; Miriam claims to know who shot Jimmy.
Yolanda and SIU throw themselves into solving Jimmy's case and find themselves working with Miriam and outside the system.