In the Season 5 finale, 15 Division officers track down the car-bomber but realize he has more targets set to explode.
Duncan is back on duty and trying to patch up things with Andy - something she's not eager to do. When a bomb explodes in a downtown parking garage, 15 Division sets out to find the source of the threat and stop any further actions.
As part of a community outreach program, 15 Division is tasked with helping tenants move out of a subsidized-housing complex so it can be torn down. When Andy and Chloe find a severely beaten man in one of the empty units, their investigation uncovers a brutal criminal operation.
Chris's addiction problems come to a head when a simple call puts Dov and Chris in the center of an iffy home invasion inquiry. When the victim's secrets surface, Chris and Dov end up in a struggle for their lives.
In the midst of a chaotic day at the station, Oliver helps Andy get ready to defend herself at Duncan's dismissal hearing. The hearing has been moved up leaving them only two hours to prepare. But, when Duncan produces new evidence that shifts all the blame to Andy, Oliver must decide if he's willing to compromise his professional integrity – and his friendship with Andy – to save her career.moreless
As the officers of 15 Division look for the killer of Brian Gowdy, Andy and Sam go on the road to interview a list of inmates at Millburn Penitentiary. All are known associates of the prime suspect and one person on that list happens to be none other than Sam’s elusive father.moreless
Dov gets suspicious when Chris's behavior turns erratic while 15 Division is undercover looking for illegal handguns at a club-land bar. Andy helps Sam with his missing person's case after learning Duncan has made serious professional accusations against her.
The discovery of an executed gang leader sends 15 Division into overdrive to find the killer before a gang war erupts. Andy and rookie Duncan are put to the test when the murderer zeros in on the lone witness.
With Fite Nite approaching, Inspector Jarvis sends the officers out to seize anything purchased with money earned illegally. Andy and Nick's seizure at an illegal gambling establishment also gets a dubious confession which has Andy asking Sam for help in sorting things out and finding the money.
Inspector Jarvis promotes Oliver to Acting Staff Sergeant with Frank's dismissal. Duncan Moore is the new addition to 15 Division and Andy, feeling she's up to the challenge, asks to be his Training Officer. When their first case is a messy homicide at a pawnshop, Andy has to show Duncan how to handle a crime scene and not compromise the case. Sam's sister, Sarah, is ready to head out but gives Andy some instructive words on what to expect in the long run with Sam.moreless
Sam is headed for an operation and Chloe is in critical care, so Andy and Dov try to take a break and "not be cops tonight" at an all night diner. Instead of some down time, they are faced with two violent people who hold up the diner. All the exhausted officers of 15 Division do their best to contain the collateral damage under the watch of new Inspector John Jarvis. Nick neglects his station duties to track down Sam's next of kin. Andy has to share a heart-wrenching decision with the two men she cares about.moreless