The Rookie

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.

The president visits Los Angeles.

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 trainee than he was with her and she does not like it.

Nolan makes a quiet arrest; Lucy and Celina race to rescue a kidnapping victim; Harper and Lopez help outsmart a killer; Miles visits a familiar face.

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.

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.

Officer Lucy Chen goes undercover to infiltrate an illegal firearm operation; Detective Harper and Officer John Nolan work together to solve a mystery involving severed limbs found around the city.

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.

The team investigates a pattern of kidnappings, which leads them to a discovery that hits close to home with one of their own; Lucy and Tim's relationship is put to the test as they begin to feel the hard hours of their jobs.

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.

Officer Nolan learns his identity has been stolen and could jeopardize his position as an officer; Sgt. Grey must testify at the parole hearing of the man who shot him and murdered his partner.

Harper and Miles feel the weight of their recent mistakes, while Harper is tasked with training Miles; Nolan and Celina are dispatched to a robbery call where Nolan encounters a familiar face.

Officers Nolan and Harper investigate a murder which may have national security implications; Officer Bradford must confront his past when he crosses paths with a homeless veteran.

Harper and Lucy go undercover in Baja while investigating the murder of two young women; Nolan and Bailey navigate their long-distance relationship.

Nolan is given some life-changing news and invites Grace over for a home-cooked meal in his newly remodeled kitchen; each unit is tasked with following up on dormant cases in hopes of uncovering new leads.

It's Valentine's Day, and the team is on the hunt for someone who is setting more than hearts on fire; Celina thinks Miles' recent string of bad luck is the result of a curse, and she's determined to break it.

Nolan takes his son's fiancée, Abigail, on a ride-along after she shows interest in becoming a police officer; Jackson's relationship becomes increasingly complicated.

Officer Nolan and the entire team are in a desperate search to rescue Officer Chen after her abduction; Officer Lopez discovers Wesley unconscious from a dangerous cocktail of alcohol and pills.

Officer 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 is beginning to threaten her friendship with Jackson.

Officer Nolan and the team are charged with escorting a notorious female serial killer to the graves of her victims; Officer Chen meets a seemingly perfect man who sparks her interest; Officer Lopez worries about Wesley.

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; when someone from his past returns, Tim disappears and leaves Lucy in the dark.

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; the team investigates a homicide case with a potential tie to the pentagram killer.

Nolan and Bailey's honeymoon is more of a nightmare than a dream when it turns into an active crime scene; Tim and Celina partner up and must uncover the identity of a John Doe.

The team must stop a militia from detonating a highly combustible truck in their possession; Nolan, Thorson, Juarez and Harper search for three men who may have been exposed to Ebola.

The team comes together to celebrate John and Bailey's wedding; Celina discovers a discrepancy in her case, leading to a new discovery; Lucy and Tim's relationship is put to the test.

The team must try to understand why they were targeted and if there is a bigger plan in place; Nolan must survive his last shift before his wedding to Bailey.

With help from the FBI, Lopez puts everything on the line to help Elijah Stone take down a gang leader in exchange for her safety; Nolan and Bailey must deal with the secrets and shady dealings his late mother left behind.

Desperate to break free from his connection to Elijah, Wesley tries to plant a listening device in his office to incriminate him; Officer Bradford and his sister, Genny, learn an unsettling truth about their father.

Officer Nolan and team are on a hunt to retrieve a buried stash of gold before any treasure seekers get hurt; Bradford is tasked with encouraging the oldest cop at the station to retire and invites him to ride with him.

The team goes on a city-wide hunt for an individual who is threatening to cause a mass casualty event; Tim's sister shows up unannounced with some surprising news; Lopez continues her inner struggle over Wesley's deal with Elijah.

When Dim goes missing, Officer Chen and Sgt. Bradford, along with the CIA, set out to find him and enlist the help of Juicy.

John and Harper work together to catch Oscar; Angela investigates a bank robbery; Lucy and Tim learn to adapt to her new schedule; Miles' first date takes an unexpected turn.

The team helps skip tracer Randy when his new love interest is kidnapped; Angela and Nyla enlist their moms to help catch a con artist; Wesley is threatened to drop a case.

The team has mixed feelings when a familiar face returns hoping to prove himself; an influencer gets his fans to come after Wesley; Tim supports Lucy as she prepares for the sergeant's exam.

Documentary filmmakers interview the LAPD on a complicated missing person's case connected to John.

Tim receives a strange message, launching a larger investigation into the dark web; Celina works to take down a popular podcast; Miles helps update the department's training videos.

When anti-LAPD billboards emerge throughout the city, the team searches for who's responsible; a car bombing prompts an investigation; Miles reconnects with an old friend; John and Bailey assess their ability to adopt.

An April Fools' prank on LAPD's social media leads to citywide chaos; John's T.O. skills are tested; Wesley is assigned a challenging case; Tim and Lucy play a joke on the team.

John and Celina find themselves in a hostage situation while undercover for a public safety initiative; while Angela and Nyla investigate the suspects, Tim challenges Lucy's decision-making skills.

John, Lucy and Angela investigate the suspicious stabbing of three teenage girls; the team experiences technical difficulties while managing a group of prisoners and a wild animal.

The team mobilizes to locate a suspect after a deadly series of events affects one of their own; Celina takes on her first case with Bailey's help.

Nyla remains suspicious of Liam Glasser as a wildfire erupts, causing chaos in the city; James tries to help a friend; Seth makes a costly mistake, putting two of their own in danger.

On Celina's last day as a rookie, John gives her one final test; Bailey makes a new friend; Lucy places her faith in Seth for an undercover assignment.

It's Valentine's Day, and Lt. Grey gives Tim and Lucy an unromantic assignment; John and Celina track down a missing girl; the team sharpens up for a charity gala where multiple relationships come to a head.

The team searches for a serial killer; Nyla struggles with the aftermath following the attack; Lucy's relationship with Seth takes a turn; Bailey battles her fear of Jason Wyler.

Following his stint at the LAPD, Wesley returns to the DA's office where his past connects him to the team's investigation; Bailey and John have conflicting feelings over safety; Lucy grows suspicious of Seth.

Ahead of Bailey's return home, John looks for clues to locate Jason Wyler; Tim and Lucy swap rookies; a friendly face resurfaces at the station; Wesley feels unsettled over Angela.

The team is tasked with community policing while hunting for a local vigilante; Celina's instincts are tested; Tim and Lucy discover secrets about the two new rookies.

John and the team welcome two new rookies and continue the hunt for two dangerous inmates with very personal vendettas following their prison escape.

Sgt. Grey helps the team prepare for their biggest mission yet; Aaron, Lopez, Celina, Tim and Smitty discover a surprising connection in their case.

Officer Nolan and Celina take on a special case; Monica enlists help to identify her attackers; Lopez and Harper discover a connection to the trail of crimes.

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; Tim and Aaron embark on a metro ops mission.

When two teenagers go missing, it is up to the entire team to find the girls and uncover the truth about their disappearance; Lopez and Harper search for the perfect nanny.

Following their time as foster parents, Bailey wants to have a baby and forces John to reconsider their decision to not have children; John and Celina discover a prison escapee whom they fear is out for revenge and race to find her.

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; when someone from his past returns, Tim disappears and leaves Lucy in the dark.

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; the team investigates a homicide case with a potential tie to the pentagram killer.

Nolan and Bailey's honeymoon is more of a nightmare than a dream when it turns into an active crime scene; Tim and Celina partner up and must uncover the identity of a John Doe.

The team comes together to celebrate John and Bailey's wedding; Celina discovers a discrepancy in her case, leading to a new discovery; Lucy and Tim's relationship is put to the test.

The team must try to understand why they were targeted and if there is a bigger plan in place; Nolan must survive his last shift before his wedding to Bailey.

Officer John Nolan and Bailey search for a mystery gunman after a shooting hits a little too close to home; Aaron struggles to live within his means; Wesley suspects that a judge is taking bribes.

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.

Officer Lucy Chen goes undercover to infiltrate an illegal firearm operation; Detective Harper and Officer John Nolan work together to solve a mystery involving severed limbs found around the city.

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.

The team investigates a pattern of kidnappings, which leads them to a discovery that hits close to home with one of their own; Lucy and Tim's relationship is put to the test as they begin to feel the hard hours of their jobs.

When Dim goes missing, Officer Chen and Sgt. Bradford, along with the CIA, set out to find him and enlist the help of Juicy.

Officer Nolan mildly injures himself while chasing down a shoplifter and the local district attorney wants to charge the suspect with assault, despite Nolan's wishes; Lucy goes undercover; Lopez's wedding venue is seized by the FBI.

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.

The team must stop a militia from detonating a highly combustible truck in their possession; Nolan, Thorson, Juarez and Harper search for three men who may have been exposed to Ebola.

With help from the FBI, Lopez puts everything on the line to help Elijah Stone take down a gang leader in exchange for her safety; Nolan and Bailey must deal with the secrets and shady dealings his late mother left behind.

Officer John Nolan and Bailey search for a mystery gunman after a shooting hits a little too close to home; Aaron struggles to live within his means; Wesley suspects that a judge is taking bribes.

In the midst of a heatwave and a citywide blackout, Nolan and Aaron follow increasingly large leads after they discover criminals hiding at the station; Chen makes an alarming discovery after being called to a scene with a pungent smell.

Nolan and Celina must stand guard at a hospital after a dangerous prisoner needs surgery; Aaron, Lopez and Harper look into a string of robberies; Tim and Lucy consider how their secret relationship will affect their work; Lopez gets unexpected news.

The search for a missing boy leads the team into the middle of a dangerous drug war between two rival gangs.

Detective Nyla Harper and James find themselves in the middle of a bank robbery which leads the entire team on a citywide manhunt; Tim and Lucy go on their first date.

Officer Nolan and Bailey discover there's more to Fred's death than meets the eye; Officer Chen and Officer Bradford demand a treasure hunt rematch and enlist Officer Grey to help set the terms to a new bet.

Officer John Nolan and the team investigate the unexpected death of a suspect in police custody; Sgt. 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.

Officers John Nolan and Celina Juarez are in a race against time to stop the source of an explosive rampage.

Officer John Nolan and Celina witness a shooting and realize the victim is already dead; Bailey has been feeling off-center since the proposal, leaving Nolan to wonder what he can do to make her feel better.

Nolan and Celina investigate a cash deposit linked to an old DEA case; Wesley grows increasingly concerned about his deposition and is shocked when he realizes Elijah's attorney is a familiar face from his past.

Nolan and Juarez are on the hunt for a fugitive after a car incident goes awry; a past injury comes to haunt Tim and Lucy comes through during his time in need in more ways than one.

Rosalind returns with a vengeance and Bailey's life is left hanging in the balance; Nolan is forced to make a deadly decision after a harrowing ultimatum.

Officer John Nolan is assigned his first rookie, Officer Celina Juarez, whose unconventional approach to police work poses a unique challenge for him.

Officer John Nolan moves closer to his new role as a training officer; John must uncover the truth about another officer's suicide; Lucy's successful undercover assignment earns her an invitation for specialized training.

Officer John Nolan is once again face to face with serial killer Rosalind; officers Bradford and Chen work undercover with Detective Lopez and the Las Vegas Police Department to arrest leaders of a major criminal enterprise.

Officer 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; Sgt. Bradford and Officer Chen go under cover together in a possible drug trafficking case.

Sgt. Grey supports Officer Nolan's desire to become a training officer and offers to ride with him for the day to get him ready; Tim and Lucy decide on their plans for Mother's Day and a romantic vacation.

The team, alongside the LA division of the FBI, is 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.

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 is called to investigate a train robbery; Officer Chen has doubts about being Sgt. Bradford's aid; Officer Harper takes matters into her own hands and makes a life-changing decision about her personal life.

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.

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; the show's producer is found murdered and the team must investigate before Aaron is made suspect number one.

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.

Officers Nolan and Harper help Skip Tracer Randy on his first bounty hunter case; Officer Chen and Sgt. Bradford hunt for a perpetrator on a citywide crime spree.

Officers Nolan and Chen must fulfill three quests if they want to get a stolen police helicopter back safely from a teenage thief; Officer Harper and Thorson must guard a convicted cop killer in the hospital following a prison riot.

The team responds to the report of a severed hand washing up on the beach and is on the hunt to find its owner; Tim attempts to prove he isn't a control freak to Lucy and invites her on a double date with him and Ashley.

The team must rely on a criminal for his expertise to help take down an even bigger threat; Officers Chen and Bradford investigate the murder of an unhoused teenager who used to be friends with Tamara.

Now that John 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.

Desperate to break free from his connection to Elijah, Wesley tries to plant a listening device in his office to incriminate him; Officer Bradford and his sister, Genny, learn an unsettling truth about their father.

The team goes on a city-wide hunt for an individual who is threatening to cause a mass casualty event; Tim's sister shows up unannounced with some surprising news; Lopez continues her inner struggle over Wesley's deal with Elijah.

Officer Nolan and Bailey discover there's more to Fred's death than meets the eye; Officer Chen and Officer Bradford demand a treasure hunt rematch and enlist Officer Grey to help set the terms to a new bet.

Officer Nolan and team are on a hunt to retrieve a buried stash of gold before any treasure seekers get hurt; Bradford is tasked with encouraging the oldest cop at the station to retire and invites him to ride with him.

When a new designer drug hits the streets, Officer Nolan and the team have a Halloween they won't soon forget; Lucy questions whether her apartment building might be haunted.

Officer Nolan and Officer Chen search for a missing person who may have international ties, putting everyone's lives in danger; Harper continues the search for a serial arsonist; Wesley must overcome an impossible task.

Officers Nolan and Chen report to a structure fire and suspect that there is more to the situation than meets the eye; after a sniper shooting, the team searches for the shooter and discovers that the perpetrator has a connection to one of its own.

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; Nolan works up the courage to ask Bailey out on a date.

Officer 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 mildly injures himself while chasing down a shoplifter and the local district attorney wants to charge the suspect with assault, despite Nolan's wishes; Lucy goes undercover; Lopez's wedding venue is seized by the FBI.

Officers Nolan and Bradford hope they can de-escalate a drug war before any innocent lives are lost; Officer Harper hopes she can get Officer Chen ready to go under cover.

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.

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 trainee than he was with her and she does not like it.

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.

An Amber Alert sends the team on a race against time to find a newborn infant who was stolen from a local hospital; Officers Jackson and Chen work their last shift as rookies as Officer Nolan continues for 30 more days.

Officer Nolan, Officer Harper and Detective 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.

Officer Nolan's decision to return to school to become a training officer proves to be much harder than he expected; Officer Chen considers going into undercover work after getting a taste of the job.

Officer Nolan is taken hostage by a man with nothing to lose; Officer Jackson and his training officer, Officer Doug Stanton, reach a tipping point in their relationship that could end Jackson's career.

Officer Jackson West's relationship with his new training officer, Stanton, escalates, and he begins to work with Sgt. Grey to find a solution.

Officer John Nolan's mom makes an unannounced visit, which complicates his life; Sgt. Grey considers retiring.

Officer John Nolan and Officer Nyla Harper are assigned to a community policing center in an attempt to rebuild their station's reputation in the community.

Nearing the end of his training, Nolan 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.

Nolan's discovery goes much deeper than he expected and could put his life and career in jeopardy.

Officers Nolan, Chen and West are squeezed harder than ever before as their training officers evaluate whether they are truly ready for the job; one of the rookie classmates is involved in a shooting.

Officers Nolan and Harper escort four juvenile offenders to a Scared Straight program at a correctional facility, but it quickly becomes a riotous situation; Nolan is uncertain about Grace after she fails to introduce him to her ex-husband.

Officer 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 is beginning to threaten her friendship with Jackson.

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.

Officer Nolan learns his identity has been stolen and could jeopardize his position as an officer; Sgt. Grey must testify at the parole hearing of the man who shot him and murdered his partner.

Officers Nolan and Harper investigate a murder which may have national security implications; Officer Bradford must confront his past when he crosses paths with a homeless veteran.

Nolan is given some life-changing news and invites Grace over for a home-cooked meal in his newly remodeled kitchen; each unit is tasked with following up on dormant cases in hopes of uncovering new leads.

Nolan takes his son's fiancée, Abigail, on a ride-along after she shows interest in becoming a police officer; Jackson's relationship becomes increasingly complicated.

Officer Nolan and the entire team are in a desperate search to rescue Officer Chen after her abduction; Officer Lopez discovers Wesley unconscious from a dangerous cocktail of alcohol and pills.

Officer Nolan and the team are charged with escorting a notorious female serial killer to the graves of her victims; Officer Chen meets a seemingly perfect man who sparks her interest; Officer Lopez worries about Wesley.

Officer Nolan's trust is tested when he tries to help the previous owner of his home reconnect with his family; Officer Harper's overnight visit with her daughter is put into jeopardy when her past undercover life resurfaces again.

Officer Nolan kicks off his birthday by babysitting a crime scene at a law office; Officer Bradford and Officer West are set to receive special awards; Sgt. Grey rides patrol with Officer Harper after she requests an early annual evaluation.

John and Jessica's relationship gets a lot more complicated after she delivers some surprising news; Officer Bradford and Officer West are assigned a community policing project helping out the Watts Rams as volunteer coaches.

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.

The rookies are asked to develop their first confidential informants; Officer Chen's mother complicates her home life when she comes to stay with her.

Officer Nolan gets off to a rocky start after being introduced to his new training officer; Officer Bradford struggles to think of an appropriate birthday gift for Rachel; Officer Lopez finds herself navigating a case that triggers a personal memory.

Officer Nolan navigates his relationship with Jessica and a developing rapport with Grace while working a high-stakes criminal case involving an undercover homeland security agent; Officer Chen meddles with Officer Bradford's love life.

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.

The officers grapple with the aftermath of a plotted attack on the city of Los Angeles, leaving Bradford fighting for his life.

When a new designer drug hits the streets, Officer Nolan and the team have a Halloween they won't soon forget; Lucy questions whether her apartment building might be haunted.

Now that John 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.

As the rookies prepare for a big exam to see who moves on to the next stage of training, Nolan and 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.

Sgt. Gray informs the rookies that they must track down a specific set of crimes in a 48-hour period to qualify for their final exam; Nolan and Bishop answer a silent alarm call at will.i.am's house.

When a cop is arrested by Internal Affairs for lying on the witness stand, it leads to the release of three felons whose cases he worked on; Officer Nolan finds out he is being sued by a man who claims he used excessive force which led to an injury.

A massive earthquake rocks the city and throws everything into chaos; Russo recommends Officer Nolan for a protective detail of Brad Hayes, a man whose dealings have put a target on his head.

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 Bradford pull over Mario Lopez, who thinks he can talk his way out of a traffic violation.

When a prison bus crashes, 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.

The rookies are really put to the test when they are forced to make all 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.

A large sum of money used in a drug bust goes missing; the rookies become the prime suspects, as they had previously discussed what they would do with the money.

The team is on high alert during the most dangerous day of the year, Valentine's Day; officer Nolan invites everyone over for a party now that he is single.

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 while the rest of the team tries to keep the streets safe for his visit.

Officer Nolan and Sgt. Grey are paired up for the day on patrol; Officer Chen is paired up with Capt. Andersen, and Officer Bradford tells Chen to protect her at all costs.

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.

Nolan and Bishop respond to a silent alarm call at a local convenience store where two men are attempting to rob the place; Bishop helps coordinate a drug bust.

Sgt. Grey informs officer Nolan and officer Bishop that they are going to have a movie director as a ride-along; officer Bradford learns that his wife has been arrested for drug possession.

The team must help capture a cop and his former mentor from the academy after he becomes a fugitive following an assault; Officer Tim Bradford needs Officer Lucy Chen to learn to predict the moves of criminals in order to capture them.

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.

The rookies are temporarily paired with new training officers; when Nolan and Lopez track down an escaped criminal, they discover a little kindness goes a long way; Jackson is forced to face his fears when he is partnered with officer Bradford.

After Nolan and Talia lose control of a crime scene, they begin to debate whether people are fundamentally good or bad; Lucy worries Tim is enabling his wife's destructive behavior and not taking care of himself.

Talia forces Nolan to confront his personal moral instincts after he encounters a kidnapping victim; Lucy is temporarily placed with a new training officer who tests her patience; Jackson must confront his failures.

After a life-altering incident, John Nolan decides to pursue his dream of becoming a police officer; as the force's oldest rookie, John is met with skepticism from some higher-ups.

Officer 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.

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.

Officer Nolan and Officer Chen search for a missing person who may have international ties, putting everyone's lives in danger; Harper continues the search for a serial arsonist; Wesley must overcome an impossible task.

Officer John Nolan and Officer Nyla Harper are assigned to a community policing center in an attempt to rebuild their station's reputation in the community.

Officers Nolan and Chen report to a structure fire and suspect that there is more to the situation than meets the eye; after a sniper shooting, the team searches for the shooter and discovers that the perpetrator has a connection to one of its own.

Nearing the end of his training, Nolan 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 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; Nolan works up the courage to ask Bailey out on a date.

Officer Nolan's decision to return to school to become a training officer proves to be much harder than he expected; Officer Chen considers going into undercover work after getting a taste of the job.

Officer Nolan is taken hostage by a man with nothing to lose; Officer Jackson and his training officer, Officer Doug Stanton, reach a tipping point in their relationship that could end Jackson's career.

Officer Jackson West's relationship with his new training officer, Stanton, escalates, and he begins to work with Sgt. Grey to find a solution.

Officer John Nolan's mom makes an unannounced visit, which complicates his life; Sgt. Grey considers retiring.

In the midst of a heatwave and a citywide blackout, Nolan and Aaron follow increasingly large leads after they discover criminals hiding at the station; Chen makes an alarming discovery after being called to a scene with a pungent smell.

Officers Nolan and Bradford hope they can de-escalate a drug war before any innocent lives are lost; Officer Harper hopes she can get Officer Chen ready to go under cover.

An Amber Alert sends the team on a race against time to find a newborn infant who was stolen from a local hospital; Officers Jackson and Chen work their last shift as rookies as Officer Nolan continues for 30 more days.

Officer Nolan, Officer Harper and Detective 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.

Officer Nolan's trust is tested when he tries to help the previous owner of his home reconnect with his family; Officer Harper's overnight visit with her daughter is put into jeopardy when her past undercover life resurfaces again.

Officer Nolan kicks off his birthday by babysitting a crime scene at a law office; Officer Bradford and Officer West are set to receive special awards; Sgt. Grey rides patrol with Officer Harper after she requests an early annual evaluation.

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.

As the rookies prepare for a big exam to see who moves on to the next stage of training, Nolan and 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.

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 Bradford pull over Mario Lopez, who thinks he can talk his way out of a traffic violation.

When a cop is arrested by Internal Affairs for lying on the witness stand, it leads to the release of three felons whose cases he worked on; Officer Nolan finds out he is being sued by a man who claims he used excessive force which led to an injury.

The officers grapple with the aftermath of a plotted attack on the city of Los Angeles, leaving Bradford fighting for his life.

When a prison bus crashes, 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.

The rookies are really put to the test when they are forced to make all 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.

John and Jessica's relationship gets a lot more complicated after she delivers some surprising news; Officer Bradford and Officer West are assigned a community policing project helping out the Watts Rams as volunteer coaches.

Officer Nolan navigates his relationship with Jessica and a developing rapport with Grace while working a high-stakes criminal case involving an undercover homeland security agent; Officer Chen meddles with Officer Bradford's love life.

Sgt. Gray informs the rookies that they must track down a specific set of crimes in a 48-hour period to qualify for their final exam; Nolan and Bishop answer a silent alarm call at will.i.am's house.

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.

A massive earthquake rocks the city and throws everything into chaos; Russo recommends Officer Nolan for a protective detail of Brad Hayes, a man whose dealings have put a target on his head.

The rookies are asked to develop their first confidential informants; Officer Chen's mother complicates her home life when she comes to stay with her.

Officer Nolan gets off to a rocky start after being introduced to his new training officer; Officer Bradford struggles to think of an appropriate birthday gift for Rachel; Officer Lopez finds herself navigating a case that triggers a personal memory.

Nolan's discovery goes much deeper than he expected and could put his life and career in jeopardy.

Officers Nolan, Chen and West are squeezed harder than ever before as their training officers evaluate whether they are truly ready for the job; one of the rookie classmates is involved in a shooting.

Officers Nolan and Harper escort four juvenile offenders to a Scared Straight program at a correctional facility, but it quickly becomes a riotous situation; Nolan is uncertain about Grace after she fails to introduce him to her ex-husband.

The LAPD, FBI and Interpol work with Monica Stevens in Prague to target high-value terrorists operating within and outside the United States.

When two teenagers go missing, it is up to the entire team to find the girls and uncover the truth about their disappearance; Lopez and Harper search for the perfect nanny.

Following his stint at the LAPD, Wesley returns to the DA's office where his past connects him to the team's investigation; Bailey and John have conflicting feelings over safety; Lucy grows suspicious of Seth.

Sgt. Grey helps the team prepare for their biggest mission yet; Aaron, Lopez, Celina, Tim and Smitty discover a surprising connection in their case.

Ahead of Bailey's return home, John looks for clues to locate Jason Wyler; Tim and Lucy swap rookies; a friendly face resurfaces at the station; Wesley feels unsettled over Angela.

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; Tim and Aaron embark on a metro ops mission.

Following their time as foster parents, Bailey wants to have a baby and forces John to reconsider their decision to not have children; John and Celina discover a prison escapee whom they fear is out for revenge and race to find her.

It's Valentine's Day, and Lt. Grey gives Tim and Lucy an unromantic assignment; John and Celina track down a missing girl; the team sharpens up for a charity gala where multiple relationships come to a head.

John and the team welcome two new rookies and continue the hunt for two dangerous inmates with very personal vendettas following their prison escape.

Officer Nolan and Celina take on a special case; Monica enlists help to identify her attackers; Lopez and Harper discover a connection to the trail of crimes.

The team is tasked with community policing while hunting for a local vigilante; Celina's instincts are tested; Tim and Lucy discover secrets about the two new rookies.

The team searches for a serial killer; Nyla struggles with the aftermath following the attack; Lucy's relationship with Seth takes a turn; Bailey battles her fear of Jason Wyler.

The team mobilizes to locate a suspect after a deadly series of events affects one of their own; Celina takes on her first case with Bailey's help.

On Celina's last day as a rookie, John gives her one final test; Bailey makes a new friend; Lucy places her faith in Seth for an undercover assignment.

Nyla remains suspicious of Liam Glasser as a wildfire erupts, causing chaos in the city; James tries to help a friend; Seth makes a costly mistake, putting two of their own in danger.

The team must rely on a criminal for his expertise to help take down an even bigger threat; 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 is on the hunt to find its owner; Tim attempts to prove he isn't a control freak to Lucy and invites her on a double date with him and Ashley.

Officers Nolan and Chen must fulfill three quests if they want to get a stolen police helicopter back safely from a teenage thief; Officer Harper and Thorson must guard a convicted cop killer in the hospital following a prison riot.

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.

Officers Nolan and Harper help Skip Tracer Randy on his first bounty hunter case; Officer Chen and Sgt. Bradford hunt for a perpetrator on a citywide crime spree.

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; the show's producer is found murdered, and the team must investigate before Aaron is made suspect number one.

The team is called to investigate a train robbery; Officer Chen has doubts about being Sgt. Bradford's aide; Officer Harper takes matters into her own hands and makes a life-changing decision about her personal life.

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.

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, is 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.

Sgt. Grey supports Officer Nolan's desire to become a training officer and offers to ride with him for the day to get him ready; Tim and Lucy decide on their plans for Mother's Day and a romantic vacation.

Officer 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; Sgt. Bradford and Officer Chen go undercover together in a possible drug trafficking case.

An April Fools' prank on LAPD's social media leads to citywide chaos; John's T.O. skills are tested; Wesley is assigned a challenging case; Tim and Lucy play a joke on the team.

John, Lucy and Angela investigate the suspicious stabbing of three teenage girls; the team experiences technical difficulties while managing a group of prisoners and a wild animal.

Tim receives a strange message, launching a larger investigation into the dark web; Celina works to take down a popular podcast; Miles helps update the department's training videos.

John and Celina find themselves in a hostage situation while undercover for a public safety initiative; while Angela and Nyla investigate the suspects, Tim challenges Lucy's decision-making skills.

When anti-LAPD billboards emerge throughout the city, the team searches for who's responsible; a car bombing prompts an investigation; Miles reconnects with an old friend; John and Bailey assess their ability to adopt.

Documentary filmmakers interview the LAPD on a complicated missing person's case connected to John.

Talia forces Nolan to confront his personal moral instincts after he encounters a kidnapping victim; Lucy is temporarily placed with a new training officer who tests her patience; Jackson must confront his failures.

The team helps skip tracer Randy when his new love interest is kidnapped; Angela and Nyla enlist their moms to help catch a con artist; Wesley is threatened to drop a case.

After a life-altering incident, John Nolan decides to pursue his dream of becoming a police officer; as the force's oldest rookie, John is met with skepticism from some higher-ups.

John and Harper work together to catch Oscar; Angela investigates a bank robbery; Lucy and Tim learn to adapt to her new schedule; Miles' first date takes an unexpected turn.

The team has mixed feelings when a familiar face returns hoping to prove himself; an influencer gets his fans to come after Wesley; Tim supports Lucy as she prepares for the sergeant's exam.

After Nolan and Talia lose control of a crime scene, they begin to debate whether people are fundamentally good or bad; Lucy worries Tim is enabling his wife's destructive behavior and not taking care of himself.

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.

The rookies are temporarily paired with new training officers; when Nolan and Lopez track down an escaped criminal, they discover a little kindness goes a long way; Jackson is forced to face his fears when he is partnered with officer Bradford.

Officer John Nolan is once again face to face with serial killer Rosalind; 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 moves closer to his new role as a training officer; John must uncover the truth about another officer's suicide; Lucy's successful undercover assignment earns her an invitation for specialized training.

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; Nolan is forced to make a deadly decision after a harrowing ultimatum.

Nolan and Juarez are on the hunt for a fugitive after a car incident goes awry; 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; Wesley grows increasingly concerned about his deposition and is shocked when he realizes Elijah's attorney is a familiar face from his past.

Officer John Nolan and Celina witness a shooting and realize the victim is already dead; Bailey has been feeling off-center since the proposal, leaving Nolan to wonder what he can do to make her feel better.

Officer John Nolan and the team investigate the unexpected death of a suspect in police custody; Sgt. 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.

Officers John Nolan and Celina Juarez are in a race against time to stop the source of an explosive rampage.

Nolan and Celina must stand guard at a hospital after a dangerous prisoner needs surgery; Aaron, Lopez and Harper look into a string of robberies; Tim and Lucy consider how their secret relationship will affect their work; Lopez gets unexpected news.

Detective Nyla Harper and James find themselves in the middle of a bank robbery which leads the entire team on a citywide manhunt; Tim and Lucy go on their first date.

The search for a missing boy leads the team into the middle of a dangerous drug war between two rival gangs.

The team must help capture a cop and his former mentor from the academy after he becomes a fugitive following an assault; Officer Tim Bradford needs Officer Lucy Chen to learn to predict the moves of criminals in order to capture them.

Officer Nolan and Sgt. Grey are paired up for the day on patrol; Officer Chen is paired up with Capt. Andersen, and Officer Bradford tells Chen to protect her at all costs.

The team is on high alert during the most dangerous day of the year, Valentine's Day; officer Nolan invites everyone over for a party now that he is single.

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 while the rest of the team tries to keep the streets safe for his visit.

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.

Sgt. Grey informs officer Nolan and officer Bishop that they are going to have a movie director as a ride-along; officer Bradford learns that his wife has been arrested for drug possession.

Nolan and Bishop respond to a silent alarm call at a local convenience store where two men are attempting to rob the place; Bishop helps coordinate a drug bust.

A large sum of money used in a drug bust goes missing; the rookies become the prime suspects, as they had previously discussed what they would do with the money.