Starting over isn’t easy, especially for small-town guy John Nolan who, after a life-altering incident, is pursuing his dream of being a police officer.
Talia forces Nolan to confront his personal moral instincts in order to be a good cop after he encounters a kidnapping victim. Meanwhile, Lucy is temporarily placed with a new training officer who tests her patience, and Jackson must confront his failures head-on if he wants to be an officer.
After Nolan and Talia lose control of a crime scene, they begin to debate whether people are fundamentally good or bad and what that means for a police officer. Meanwhile, Lucy is concerned Tim is enabling his wife’s destructive behavior and not taking care of himself.
The rookies are temporarily paired with new training officers, and Officer Nolan is paired with Officer Lopez. When Nolan and Lopez track down an escaped criminal, they discover a little kindness goes a long way. Meanwhile, Jackson is forced to face his fears when he is partnered with Officer Bradford, while Officer Chen and Nolan must face a hard truth.
Nolan, the rookies and their training officers get involved in a competition that pits them against each other. Officer Lucy Chen notices Officer Tim Bradford is obsessed with winning at all costs.
Nolan and the team must help capture a cop and his former mentor from the academy after he becomes a fugitive following an assault. Meanwhile, Officer Tim Bradford needs Officer Lucy Chen to learn to predict the moves of criminals in order to capture them.
Sergeant Grey informs Officer Nolan and Officer Bishop that they are going to have a movie director as a ride-along during their patrol after a fun afternoon granting the wish of a Make-A-Wish kid as honorary police officer Kaydence Patton. Meanwhile, Officer Bradford is tested once again after he learns that his wife, Isabel, has been arrested for drug possession.
Officer Nolan and Officer Bishop respond to a silent alarm call at a local convenience store where two men are attempting to rob the place. Officer Nolan pursues one of the suspects on foot and is forced to make a split-second decision that will affect both of their lives. Meanwhile, Officer Bishop helps coordinate a drug bust that hits a little too close to home for Officer Bradford.
Officer Bradford’s wife is found shot but alive, and he vows to track down the man responsible. Officer Nolan must protect his home and the truth after a home invasion attack.
On Captain Andersen’s orders, Officer Nolan and Sergeant Grey are paired up for the day on patrol. Additionally, Nolan’s son and Grey’s daughter visit their dads on the job and see them in action. Meanwhile, Officer Chen is paired up with Captain Andersen, and Officer Bradford tells Chen to protect her at all costs.
An unscheduled visit by the vice president of the United States puts the station on high alert. The Secret Service tasks Nolan and Bishop with checking out a possible threat to the vice president while the rest of the team tries to keep the streets safe for his visit.
The most dangerous day of the year – Valentine’s Day – has the team on high alert, and Officer Nolan invites everyone over for a party now that he is single.
The rookies become the prime suspects after a large sum of money used in a drug bust goes missing.
The rookies are really put to the test when their training officers accompany them out of uniform for Plain Clothes Day, which forces them to make all the decisions while on patrol. Officer Nolan tries to prove he has been progressing faster than the other rookies to justify his desire of becoming a detective within five years.
When a prison bus crashes, all units must respond as some inmates face severe injuries while others seek an opportunity to flee. In the wake of the accident, Officer Nolan tries to impress an FBI hostage negotiator while tracking down an escaped convict.
Officer Nolan gets a lesson in respect after his arrest of a gang member leads to a free-for-all on his life. Officer Chen and Officer Bradford pull over Mario Lopez, who thinks he can talk his way out of a traffic violation.
A massive earthquake rocks the city and throws everyone’s patrols and its citizens into chaos. Agent Russo recommends Officer Nolan for a protective detail of Brad Hayes, a man whose dealings have put a target on his head.
When one of their colleagues is arrested by Internal Affairs for lying on the witness stand, it leads to the release of three felons whose cases he worked on and the team being asked to check in on them now that they are free. Meanwhile, Officer Nolan finds out he is being sued by a man who claims he used excessive force which led to an injury.
Sergeant Gray informs the rookies that they must track down a specific set of crimes in a 48-hour period in order to qualify for their final exam. Officer Nolan and Officer Bishop answer a silent alarm call at will.i.am’s house.
As the rookies prepare for a big exam to see who moves on to the next stage of training, Officer Nolan and Officer Bishop are called to the scene of a murder and learn that the victim may be tied to a potential terrorist attack on the city of Los Angeles.
Danger is ever-present as the officers of the Mid-Wilshire precinct grapple with the aftermath of a plotted attack on the city of Los Angeles, leaving Officer Bradford fighting for his life. Flash forward two weeks and the rookies receive the shocking results of their latest training exam, leaving one officer questioning what the future holds. Meanwhile, tension develops at home as Nolan and Lopez advance in their relationships with Jessica and Wesley.
Nolan teams up with new night detective Pablo Armstrong for a murder investigation case that results in an unexpected reunion with a former love interest. Bradford reluctantly accepts help from Chen as he prepares for his sergeant exam. West pursues an unconventional move after finding himself in need of a new home.
Nolan navigates building tension in his relationship with Jessica and a developing rapport with Grace, while working a high-stakes criminal case involving an undercover homeland security agent. Chen meddles with Bradford’s love life. Lopez learns some surprising news about Wesley.
Nolan gets off to a rocky start after being introduced to his new training officer, who has an unconventional approach to police work after her stint as an undercover detective. Bradford struggles to think of an appropriate birthday gift for Rachel. Lopez finds herself navigating a case that triggers a personal memory.
As part of their second phase of training, the rookies are asked to develop their first confidential informants. Nolan soon discovers that no two informants are the same and struggles with his newest task. Chen’s mother complicates her home life when she comes to stay with her.
An emergency alert of an impending missile attack sends Los Angeles into chaos and uncertainty, while the officers each try to keep the peace and deal with their own disasters.
John and Jessica’s relationship gets a lot more complicated after she delivers some surprising news. Bradford and West are assigned a community policing project helping out the Watts Rams as volunteer coaches at their Fall clinic.
Nolan kicks off his birthday by babysitting a crime scene at a law office. Bradford and West are set to receive special awards, and Sgt. Grey rides patrol with Harper after she requests an early annual evaluation.
Nolan’s trust is tested when he tries to help the previous owner of his home reconnect with his family. Harper has finally earned an overnight visit with her daughter that is put into jeopardy when her past undercover life resurfaces again.
Nolan and team are charged with escorting a notorious female serial killer to the graves of her previously unrecovered victims. However, when they arrive, they unearth even more than they expected. Chen meets a seemingly perfect man who sparks her interest, and Lopez worries about Wesley as his PTSD continues to increase.
Nolan and the entire team are in a desperate search to rescue Chen after her abduction, and must attempt to get Rosalind to help them in their search. After Lopez discovers Wesley unconscious from a dangerous cocktail of alcohol and pills, she is forced to keep him close by.
Nolan takes his son’s fiancé on a ride-along after she shows an interest in becoming a police officer. Jackson’s relationship becomes complicated at work.
Nolan is given some life-changing news and invites Grace over for a homecooked meal in his newly remodeled kitchen. Each unit is tasked with following up on dormant cases in the hopes they can uncover new leads.
Nolan and Harper investigate a murder which may have national security implications. Bradford must confront his past when he crosses paths with a homeless veteran.
Nolan is having a particularly bad day after learning his identity has been stolen and could jeopardize his position as an officer. Grey must confront his past and testify at the parole hearing of the man who shot him and murdered his partner.
Officers Chen and Bradford respond to a call at the Los Angeles auditions of American Idol and Officer Chen ends up facing Ryan Seacrest and the judges. Chen befriends a reporter whose motives are not clear.
Nolan’s relationship with his first confidential informant is tested when he discovers her back on the street dealing drugs. Lucy’s fear of dating following her abduction and her intrusion into Jackson’s relationship is beginning to threaten their friendship.
Nolan and Harper escort 4 juvenile offenders to a Scared Straight program at a correctional facility that quickly becomes a riotous situation. Nolan is uncertain about his relationship with Grace after she fails to introduce him to her ex-husband.
Their rookie year is coming to an end and Nolan, Chen and West are about to be squeezed harder than ever before as their training officers evaluate whether they are truly ready for the job. After one of their rookie classmates is involved in a shooting, the team uncovers some unsettling evidence.
Nolan’s discovery goes much deeper than he expected and could put his life and career in jeopardy.
Nearing the end of his training, Nolan now faces his biggest challenge as a police officer yet when he must come to terms with the choices he has made in pursuit of the truth.
Officer John Nolan and Officer Nyla Harper are assigned to a community policing center to help rebuild their station’s reputation in the community. Nolan is determined to make a positive impact but Nyla has her doubts.
Officer John Nolan’s mom makes an unannounced visit that complicates his life, and Sergeant Grey considers retiring.
Officer Jackson West’s relationship with his new training officer escalates, and he works with Sergeant Grey to find a solution.
Nolan is taken hostage by a man with nothing to lose while the station goes on lockdown and races to identify the suspect before time runs out. Jackson and Stanton reach a tipping point in their relationship that could end Jackson’s career.
Nolan’s decision to return to school in order to become a training officer is proving to be much harder than he expected. Chen considers going into undercover work after getting a taste of the job when Harper’s former colleague needs help.
The team gets the true crime docuseries treatment when they analyze a recent case featuring a former child actor whose adult life has garnered him a cult following.
Nolan, Harper and Lopez are assigned to the kidnapping of the son of a criminal court judge who has a long list of enemies who could possibly be involved.
An Amber Alert sends the team on a race against time to find a newborn infant who was stolen from a local hospital. Jackson and Chen work their last shift as rookies as Nolan continues on for 30 more days.
Harper and Nolan respond to a bank robbery in progress and realize the motives of the thief run much deeper than just needing money. Jackson and Chen’s first day riding without training officers isn’t what they thought it would be.
When Professor Fiona Ryan’s car window is smashed following a series of mysterious notes, Nolan volunteers to guard her house overnight. Lucy notices that Tim is being much nicer to his new boot than he was with her and she does not like it.
After rushing his son to the hospital following his collapse, Nolan is reunited with his ex-wife and they must come together to help their son. Detective Lopez discovers "La Fiera" is in the same hospital and wants to find out exactly why.
Nolan and Bradford hope they can de-escalate a drug war before any innocent lives are lost. Harper hopes she can get Officer Chen ready to go undercover.
Officer Nolan mildly injures himself while chasing down a shoplifter and the local DA wants to charge the suspect with assault despite Nolan’s wishes. Meanwhile, Lucy goes undercover, Lopez’s wedding venue is seized by the FBI, and Nolan meets his new neighbor.
Nolan and the entire team race against the clock to locate Lopez after she is kidnapped on her wedding day, not only to save her life but her unborn child’s.
Officer Nolan and Officer Chen’s run-in with an infamous thief tips them off to a potentially big heist surrounding the Getty’s big gala event. Meanwhile, Nolan works up the courage to ask Bailey out on a date.
Officer Nolan and officer Chen report to a structure fire and suspect that there is more to the situation than meets the eye. Meanwhile, after witnessing a sniper shooting, the team searches for the shooter and discovers that the perpetrator has a connection to one of their own.
Officer Nolan and Officer Chen search for a missing person who may have international ties that puts everyone’s lives in danger. Meanwhile, Harper continues the search for a serial arsonist after responding to a report of an injured cyclist, and Wesley must overcome an impossible task.
When a new designer drug hits LA streets, it turns users into “zombies,” and Officer Nolan and the team have a Halloween they won’t soon forget. Back at home, Lucy questions whether her apartment building might be haunted.
Officer Nolan and team are on a hunt to retrieve a buried stash of gold before any treasure seekers get hurt. Meanwhile, Bradford is tasked with encouraging the oldest cop at the station to retire and invites him to ride with him.
In the aftermath of Fred’s house explosion, Officer Nolan and Bailey discover there’s more to Fred’s death than meets the eye. Meanwhile, Officer Chen and Officer Bradford demand a treasure hunt rematch and enlist Officer Grey to help set the terms to a new bet, all while they arrest a series of wealthy female criminals. Elsewhere, Wesley struggles to keep it together under the pressure of his debt to Elijah.
The team goes on a city-wide hunt for an individual who is threatening a mass casualty event. Meanwhile, Tim’s sister Genny shows up unannounced with some surprising news, and Lopez continues her inner struggle over Wesley’s deal with Elijah and tries to come up with a plan to get them out of it.
Desperate to break free from his connection to Elijah, Wesley tries to plant a listening device in his office to incriminate him. Meanwhile, Officer Bradford and his sister, Genny, learn an unsettling truth about their father.
Now that Nolan knows about Bailey’s past, he must decide if they still have a future. When a plane crashes in the middle of the city, the team races to find out why.
The team must rely on a criminal for his expertise to help take down an even bigger threat. Meanwhile, Officers Chen and Bradford investigate the murder of an unhoused teenager who used to be friends with Tamara.
The team responds to the report of a severed hand washing up on the beach and are on the hunt to find its owner. Meanwhile, Tim attempts to prove he isn’t a control freak to Lucy and invites her on a double date with him and Ashley.
Officers John Nolan and Lucy Chen must fulfill three quests if they want to get a stolen police helicopter back safely from a teenage thief. Meanwhile, Officer Nyla Harper and Aaron Thorson must guard a convicted cop killer in the hospital following a prison riot.
Officers Nolan and Harper help Skip Tracer Randy on his first bounty hunter case. Meanwhile, Officer Chen and Sergeant Bradford are on the hunt for a perpetrator on a citywide crime spree.
Officer Harper puts Officer Aaron through “Plain Clothes Day,” but the exercise is interrupted by an unsuspected visitor. After two witnesses for an upcoming grand jury case are murdered, the team must track down the killers before it’s too late.
Desperate to reset the way the world sees him, Officer Thorsen reluctantly decides to be a part of a reality show to help rebrand his image, only to be thrust back into yet another deadly situation. With cameras rolling, the show’s producer is found murdered and the team must investigate before Aaron is made suspect number one.
Officer John Nolan and the team feel they must negotiate with a distraught man who is holding a hospital hostage to ensure his wife receives a lifesaving surgery.
After the robbery of a train filled with valuable auction items turns deadly, the team is called to investigate. Meanwhile, Officer Chen has doubts about being Sergeant Bradford’s aid and is upset when he doesn’t give her the recognition she deserves. Elsewhere, Officer Harper takes matters into her own hands and makes a life-changing decision about her personal life.
Officer Nolan and the LA division of the FBI enlist the help of FBI trainee Simone Clark when one of her former students is suspected of terrorism following an explosion at a local power station.
The team alongside the LA Division of the FBI are in a race to stop bombs that have been scattered throughout the city by a suspected terrorist. The joint task force is suspicious of the CIA’s involvement in the situation.
Sergeant Grey supports Officer Nolan’s desire to become a training officer and offers to ride with him for the day to get him ready. Meanwhile, Tim and Lucy must manage expectations in their respective relationships as they decide on their plans for Mother’s Day and a romantic vacation.
Officer John Nolan is forced to spend a week in solitary confinement in a quiet border town with a young local officer who is in need of some training. Meanwhile, Sergeant Bradford and Officer Chen discover that looks are deceiving and go undercover together in a possible drug trafficking case.
Officer John Nolan’s is once again face-to-face with serial killer Rosalind, and she wants him to know she’s not done with him yet. Meanwhile, officers Bradford and Chen work undercover with Detective Lopez and the Las Vegas Police Department to arrest leaders of a major criminal enterprise.
Officer John Nolan is moving closer to his new role as a training officer. In preparation, he is tasked with overseeing Officer Aaron Thorson and must uncover the truth about another officer’s suicide. Meanwhile, Lucy’s successful undercover assignment earns her an invitation for specialized training in Sacramento and she must decide if this is the path she wants to take.
Officer John Nolan is assigned his first rookie, Officer Celina Juarez, whose unconventional approach to police work poses a unique challenge for him.
Rosalind returns with a vengeance and Bailey’s life is left hanging in the balance. With a ticking clock, the LAPD and the FBI join forces, and Officer John Nolan is forced to make a deadly decision after a harrowing ultimatum.
Officer John Nolan and Officer Celina Juarez are on the hunt for a fugitive after a car incident goes awry. Meanwhile, a past injury comes to haunt Tim and Lucy comes through during his time in need in more ways than one.
Nolan and Celina investigate a cash deposit linked to an old DEA case.
Officer John Nolan and Celina witness a shooting, realize the victim was already dead, and investigate further. Back at home, Bailey has been feeling off-center ever since the proposal, leaving Nolan to wonder what he can do to make her feel more comfortable. Elsewhere, Lopez and Harper enlist Lucy’s help to investigate the gang-related murder of a local shopkeeper.
Officers John Nolan and Celina Juarez are in a race against time to stop the source of an explosive rampage.
Officer John Nolan and the team investigate the unexpected death of a suspect in police custody. Their search also uncovers a very delicate loose end that could jeopardize Officer Celina Juarez’s career. Meanwhile, Sergeant Grey and his wife, Luna, go to New York to visit their daughter, Dominique, only to realize she never made it home from the night before.
Detective Nyla Harper and James find themselves in the middle of a bank robbery which leads the entire team on a citywide manhunt. Meanwhile, Tim and Lucy finally go on their first date, but it does have a few complications.
The search for a missing boy leads the team into the middle of a dangerous drug war between two rival gangs.
Officer John Nolan and Celina are enlisted to stand guard at a hospital after a dangerous prisoner must have surgery and they suspect there’s more to it than meets the eye. Meanwhile, Aaron gets Lopez and Harper to help him investigate a string of home robberies, and Tim and Lucy consider how their new secret relationship will affect their work. Elsewhere, Lopez gets unexpected news.
In the midst of a heatwave and a citywide blackout, Officer John Nolan and Aaron follow increasingly large leads after they discover criminals hiding at the station. While on duty, Officer Chen makes an alarming discovery after being called to a scene where a pungent smell has wreaked havoc. Meanwhile, Lucy and Harper scheme to get Tim out of his new job and into a more exciting position.
Officer John Nolan and Bailey are on the hunt for a mystery gunman after a shooting hits a little too close to home. Aaron struggles to live within his means and joins Lucy to help Tamara when the mother of a child she babysits goes missing. Wesley suspects that a judge is taking bribes after he excludes valuable eyewitness testimony from a case.
With help from the FBI, Detective Lopez puts everything on the line to help Elijah Stone take down a gang leader in exchange for her safety. Meanwhile, Nolan and Bailey must deal with the secrets and shady dealings his late mother left behind.
The team must stop a militia from detonating a highly combustible truck in their possession. Meanwhile, Officers Nolan, Thorson, Juarez and Detective Harper search for three men who may have been exposed to Ebola and detain them for quarantine.
Now that Elijah and Abril have become allies, the team must rely on Monica, Elijah's lawyer, to uncover their plans; Officers Nolan and Juarez reopen her sister's case and discover a discrepancy that leads them on a new trail.
When Dim goes missing, Officer Chen and Sergeant Bradford, along with the CIA, set out to find him and enlist the help of Juicy.
The team investigates a pattern of kidnappings which leads them to a discovery that hits close to home with one of their own. Meanwhile, Lucy and Tim's relationship is put to the test as they begin to feel the hard hours of their jobs.
Officer Tim Bradford’s ex-wife returns and asks the team to help her save someone from her undercover past. Isabel’s return also creates additional pressure in Lucy and Tim’s relationship as they assist in the search.
Officer Lucy Chen goes undercover to infiltrate an illegal firearm operation, and Detective Harper and Officer John Nolan work together to solve a mystery involving severed limbs found around the city.
After one of their own is shot, the team suffers a series of close calls and realizes their division may be a target for a group of masked assailants.
In the aftermath of the assaults in the explosive season five finale, the team must now try to understand why they were targeted and if there is a bigger plan in place. Meanwhile, Nolan must survive his last shift before his wedding to Bailey.
The team comes together to celebrate John and Bailey’s wedding; meanwhile, Celina discovers a discrepancy in her case, leading to a new discovery. Elsewhere, Lucy and Tim’s relationship is put to the test.
Nolan and Bailey's honeymoon is more of a nightmare than a dream when it turns into an active crime scene. Meanwhile, Tim and Celina partner up and must uncover the identity of a John Doe.
It’s Officer Aaron Thorsen’s first day back since the assault, and he’s tasked with a series of high-stress cases to determine whether he’s ready to work. Elsewhere, the team investigates a homicide case with a potential tie to the pentagram killer.
When a toddler is found at the scene of a crime, John and Bailey must decide whether to let the child go to a shelter for the night or care for her themselves. Meanwhile, when someone from his past returns, Tim disappears and leaves Lucy in the dark.
Following their time as foster parents, Bailey has decided she wants to have a baby and forces John to reconsider their decision to not have children. Meanwhile, John and Celina discover a prison escapee whom they fear is out for revenge and race to find her before it is too late.
When two teenagers go missing, it is up to the entire team to find the girls and uncover the truth about their disappearance. Meanwhile, Lopez and Harper are on a different kind of investigation – the search for the perfect nanny.
After a mafia-related mass casualty, the team is tasked to keep the peace at the hospital. Lucy and Celina work together to investigate the suspects behind the attack. Meanwhile, Tim and Aaron embark on a metro ops mission.
Officer Nolan and Celina take on a special case; meanwhile, Monica enlists help to identify her attackers. Elsewhere, Lopez and Harper discover a connection to the trail of crimes.
Sgt. Grey helps the team prepare for their biggest mission yet. Meanwhile, Aaron, Lopez, Celina, Tim and Smitty discover a surprising connection in their case.
