Swarek's gone missing and Andy tries to find clues that will help her and the rookies locate him before it's too late. Meanwhile, investigating this case will implicate one officer and threaten Andy's job.
Gail's stolen uniform has the rookies looking for a cop impersonator, but it's Chris and Dov who find clues that may offer up the motive. While undercover, Swarek finds himself in a life threatening situation when he and Andy can't stay apart.
Traci and Andy are sent out on an undercover training exercise. Meanwhile, Dov finds himself on a ride-along with a drug dealer and old friend of his deceased brother. Back at the station, Chris and Gail deal with a teenage boy they found tied up at a graveyard.
While working a kidnapping case, Andy and Swarek find themselves on the scene of a car accident. As Swarek and the rest of Division 15 pursue the kidnapper and missing child, Andy remains at the scene with a woman trapped+ in her car. A transgression involving Gail puts Chris at odds with Dov. Andy concludes that it's time to re-evaluate her life.
Swarek takes Dov and Gail on a stakeout operation to prevent an Asian gang from committing murder. Mounted Unit training day has Andy and Chris taking part in a competitive horse training event as Andy makes an effort to move on with her personal life.
Gail and Traci apprehend a man who mysteriously collapses at the station which in turn places Division 15 under quarantine. Andy and Swarek are after a brutal bank robber and his partner but it will take some out-of-the-box thinking to+ solve this crime. Dov goes out on a first date with the bomb tech who saved his life.
Detectives Callahan and Rosati are at odds over how to correlate and interpret the facts of two vicious crimes. Luke feels strongly that the latest woman attacked on her watch is connected to an unsolved rookie's murder, but his erratic+ behavior gets him kicked off the case. Andy may be in serious trouble when Luke urges her to follow through with his hunch on the crimes.
Indications are that the East Jameson gang was involved in the murder of a police informant, so solving the case will be difficult. The pressure is on when Superintendent Elaine Peck sets up at the station. Elsewhere, Andy is paired+ with Detective Rosati who unintentionally makes Andy privy to a secret that involves Luke. Stressed out with her mother at the station, Gail is tasked with protecting an eight-year-old boy who's the only witness to the crime.
Division 15 sets up a sting operation to catch suspects with outstanding warrants. One suspect, trying to cut a deal, puts Dov and Chris in a life and death situation. Luke helps out Jo on a job with surveillance and+ the tension about the past between the two finally reaches its limit.
The torching of a Laundromat is the latest in a series of arsons which the 15th Division must work. The list of suspects is long so Chris and Gail take to the streets while Traci interrogates a person found at+ the scene. Andy is left to deal with the widow who insists on entering the burnt-out building which ends with the two of them trapped inside.
Strange happenings and a full moon rattle the rookies. Andy and Sam investigate the theft of some severed heads from a medical lab. A particular man catches their attention as a suspect with his obsessive behavior. While trying to protect+ a young woman who could be the next target, Andy puts her life and Luke's in jeopardy.
Andy and Gail participate in a drug bust by going undercover as cocktail waitresses but things don't go smoothly. Traci finds herself drawn back to Detective Barber while a complaint is filed against Dov. Andy unintentionally speaks to Sam a little too freely and candidly about her relationship with Luke.
Andy's world explodes by a seemingly senseless act of violence during a concert shooting. When she sets out to unravel the details, she comes into direct conflict with Luke's former partner, Detective Jo Rosati, a new detective with Division 15.+ As Rosati investigates the case, sparks soon fly between her and Luke.
Andy and Chris inadvertently compromise a major drug bust. Andy and Sam go undercover to try to salvage the operation but unfolding events put their lives in danger. Dov must chose between police work and his girlfriend Edie.
There's a nervous tension in the air on Judgement Day for all the rookies at 15 Division who will have to undergo make-or-break assessments by Staff Sergeant Frank.
The rookies will soon learn how they did on their evaluations and whether they get to stay on the force. Andy has a terrible experience involving a suspicious death that makes her consider leaving.
Andy and Sam look for proof that Andy's dad didn't committ a murder while he was blacked out from drinking. A masked vigilante steals Chris and Dov's squad car which in turn unintentionally helps nab a drug dealer.
During a routine prison transport, Andy and Sam's frustrations over their strained personal relationship come to a head when the inmate escapes. Dov and Gail search for clues to an amnesiac John Doe. Meanwhile, Detective Barber has Traci and Chris help him recontruct some missing court case notes.
During the investigation of a highway accident, Chris and Gail find a license plate matches that of an Amber Alert. When disturbing secrets come to light after the parents are questioned, the entire division becomes involved in the search for the 9-year old girl.
Andy and Chris are in for a surprise turn of events while investigating a beating at a nightclub. The two are then forced to make a decision that could end their careers. Luke and Sam go head to head during a retraining exercise.
A severe heat waves hits the city along with the possibility of a serial killer on the loose. During a sudden citywide blackout, Andy finds she's on her own when dealing with a vicious predator. Andy also makes an unexpected decision regarding romance that will complicate her life.
A fatal traffic accident may not be all that it seems and after Andy objects to how Callaghan handles a young murder witness, their romance may be headed for its own collision.
A home invasion in an upscale neighborhood triggers a massive first response which ends up revealing many of the officers' personal secrets. While Traci leaves the scene to deal with a personal emergency, Andy is left alone to confront the armed intruder.
Andy participates in an undercover sting operation as a prostitute. But Andy and Dov's rookie initiatives, all to impress Sergeant Boyko, put an informant's life at risk leaving it up to Andy to try to save her.
The rookies prepare for the annual "Fite Nite" charity event while Andy must decide whether to break police protocol by keeping a promise she made to a domestic abuse victim.''
While searching for a missing informant with Detective Swarek, Andy learns something about undercover work. Even though she attracted to him, Andy finds Swarek's on the job rogue tactics troubling.
Andy ruins an undercover drug sting with a rookie mistake and then attempts to make up for it.
