Andy and Dov become involved in a holdup at a diner; Nick searches for Sam Swarek's next of kin.
Oliver is promoted to Acting Staff Sergeant; a new rookie, Duncan Moore, joins the force.
Before Fite Nite, the officers have to seize all proceeds from crime.
Andy worries Duncan may not be suited to the job; Gail makes a harrowing discovery.
15 Division goes undercover at a bar that is supplying illegal firearms.
As the officers of 15 Division try to hunt down the killer of Brian Gowdy, Andy and Sam head to a prison to interview a list of inmates... a list which happens to include Jay Swarek, Sam’s elusive father.
At his dismissal hearing, Duncan reveals new incriminating evidence against Andy.
Steve tells Traci he's about to raid a gambling den frequented by her ex, Dex.
15 Division helps tenants move out of a condemned subsidized-housing complex.
When a car bomb explodes in a parking garage, Duncan goes rogue in an effort to prove himself.
A bomb goes off in the station's evidence room, with Andy inside.