In the most expensive zip code in Manhattan, an aging, eccentric art collector is found strangled in his apartment.

When the owner of a Brooklyn pizzeria is gunned down in broad daylight in his backyard, the news publishes mafia theories, and the FBI joins the NYPD to investigate.

On a bone-chilling January morning, when a 39-year-old day care owner goes missing, her fiance finds her wallet, keys and phone still in the house they share; the mystery deepens when the K9 unit searches the home but finds no trace of her.

Criminology student Imette St. Guillen was dedicating her life to catching killers when she herself was caught by one while celebrating her birthday late at night at a bar in lower Manhattan.

Alicia's disappearance leads to one of the largest missing person searches in Ontario's history; reporter Catherine McDonald reconnects with Alicia's mother to tell the tale.

A notorious gang appears to be involved in the murder of a police informant; Detective Rosati reveals something that puts Andy's relationship with Luke in danger.

Andy worries her personal problems are affecting her professionally when a woman is brutally attacked on her watch; Luke's erratic behavior leads to him being kicked off a case.

After bailing out a teenage shooting suspect, Fraser (Paul Gross) battles Ray (David Marciano) to prove the young man's innocence. With Beau Starr and Isiah Thomas.

Terrorists take over a train carrying Fraser, Meg and a group of singing mounties; with Leslie Nielsen.

When a killer executes 19-year-old Abigail Gasca-Chavez in her own home, the only witnesses are her toddler and neighborhood surveillance cameras; detectives close in on a suspect, but when he heads for the Mexican border, it's a race against time.

In North Carolina, Stephanie Powell-Anderson's convenience store shift ends in bloodshed, as part of a larger pattern of violence plaguing the area; with the assailant growing bolder by the day, the heat is on to make an arrest before he kills again.

Harm and Mac are sent on a covert mission to Iran to recover a downed pilot and his $80 million jet without letting the Iranians know.

Nia Wilson and her two sisters decide to take public transportation back home to Oakland, Calif.; just minutes after texting their father, the sisters are brutally targeted at a train station; the knife attack sparks a search for the perpetrator.

When 22-year-old Molly Jane Matheson doesn't show up for work, her mother, Tracy, drives to her Fort Worth, Texas, apartment to check on her; Tracy's grim discovery uncovers a string of related crimes that inspire Molly's family to fight for change.

After 26-year-old rideshare driver Carolina Vargas drives a nice stranger to his hotel, she has no qualms about giving him another ride; her trusting gesture turns tragic and Carolina is forced to fight for her life.

Rising social media influencer Alexis Murphy is on her way to a hair appointment, but never arrivea; her worried loved-ones know something was wrong; there's a crack in the case when gas station surveillance video reveals something truly bizarre.

The investigation into the murder of two private military contractors ends up putting a member of the team in grave danger; Sam arranges a blind date for Callen.

The team and an undercover DEA agent must determine if an explosion at a fish market was an act of terror or a smuggling deal gone wrong; a helicopter crash may be tied to Kensi and Granger's search for the white ghost.

A security specialist and former friend of Harm's hijacks a nuclear submarine with the intention of bombing a U.S. target if his ransom demands are not met.

Gibbs and the team must work with ICE and FBI agents when a security breach results in the death of an ICE agent; Tony comes face to face with Michael Rivkin (Merik Tadros).

Nia Wilson and her two sisters decide to take public transportation back home to Oakland, Calif.; just minutes after texting their father, the sisters are brutally targeted at a train station; the knife attack sparks a search for the perpetrator.

When 22-year-old Molly Jane Matheson doesn't show up for work, her mother, Tracy, drives to her Fort Worth, Texas, apartment to check on her; Tracy's grim discovery uncovers a string of related crimes that inspire Molly's family to fight for change.

After 26-year-old rideshare driver Carolina Vargas drives a nice stranger to his hotel, she has no qualms about giving him another ride; her trusting gesture turns tragic and Carolina is forced to fight for her life.

Rising social media influencer Alexis Murphy is on her way to a hair appointment, but never arrivea; her worried loved-ones know something was wrong; there's a crack in the case when gas station surveillance video reveals something truly bizarre.

Nia Wilson and her two sisters decide to take public transportation back home to Oakland, Calif.; just minutes after texting their father, the sisters are brutally targeted at a train station; the knife attack sparks a search for the perpetrator.

When 22-year-old Molly Jane Matheson doesn't show up for work, her mother, Tracy, drives to her Fort Worth, Texas, apartment to check on her; Tracy's grim discovery uncovers a string of related crimes that inspire Molly's family to fight for change.

After 26-year-old rideshare driver Carolina Vargas drives a nice stranger to his hotel, she has no qualms about giving him another ride; her trusting gesture turns tragic and Carolina is forced to fight for her life.

Rising social media influencer Alexis Murphy is on her way to a hair appointment, but never arrivea; her worried loved-ones know something was wrong; there's a crack in the case when gas station surveillance video reveals something truly bizarre.

A small community in the Rocky Mountains is shattered when two people are found dead and a two-year old goes missing; Nancy Hixt recounts one of the most disturbing cases she's covered.

Division 15 is placed under quarantine when a man collapses from a mysterious illness; Dov's date with an attractive bomb technician ends unexpectedly.

Gail and Dov work with Swarerk as they try to protect an informant from a dangerous gang; Chris and Andy participate in competitive equine training.

An exotic dancer tips off Fraser and Ray about mobsters taking over Chicago strip joints; with Milton Berle.

The people close to Ray are placed at risk when a man whom he helped place behind bars is released on parole; Internal Affairs investigates Ray.

In North Carolina, Stephanie Powell-Anderson's convenience store shift ends in bloodshed, as part of a larger pattern of violence plaguing the area; with the assailant growing bolder by the day, the heat is on to make an arrest before he kills again.

In Groton, Vermont, a young man with a developmental disability leaves work and is never seen again; with no leads in sight, investigators must rely on surveillance footage to piece together the truth behind Christopher Gray's disappearance.

The crew gets stuck in the office during a Christmas Eve blizzard; Mac investigates charges of abuse; Bud faces a daunting challenge.

The Five-0 must once again engage in the twisted mind games of serial killer Dr. Madison Gray when she arrives at the HPD covered in blood that matches Alicia Brown's.

After tracking down the missing uranium, which has been used to build a bomb in the middle of the jungle, McGarrett and Danny must move the explosive material through treacherous terrain before it detonates.

An unusual investigation takes place when the body of a murdered deep-sea diver and his suspected co-workers must stay in a decompression chamber for four days.

Secretary of the Navy Sarah Porter's daughter is kidnapped; NCIS Special Agent Valerie Page, McGee's childhood friend, assists the team with advance tactics training.

Callen and Sam search for a murder suspect -- a retired assassin (Danny Trejo) they encountered on their first case together.

When a gang identifies and executes an undercover agent, the team must locate a mole before other agents are put in danger.

Harm and Mac travel to Panama to investigate a Marine officer's wife who is suspected of smuggling drugs into the United States.

After traveling to Texas to escort a key witness to the trial of an infamous arms dealer, Sonja and Special Agent Pride are ambushed.

The Five-0 must once again engage in the twisted mind games of serial killer Dr. Madison Gray when she arrives at the HPD covered in blood that matches Alicia Brown's.

After tracking down the missing uranium, which has been used to build a bomb in the middle of the jungle, McGarrett and Danny must move the explosive material through treacherous terrain before it detonates.

When the dead body of arms dealer La Grenouille is discovered, the FBI investigates the NCIS team, and Jenny Shepard becomes the prime suspect.

Two members of the team are sent to Iraq when a mortar attack in Baghdad turns into a murder.

Callen and Sam search for a murder suspect -- a retired assassin (Danny Trejo) they encountered on their first case together.

When a gang identifies and executes an undercover agent, the team must locate a mole before other agents are put in danger.

The crew gets stuck in the office during a Christmas Eve blizzard; Mac investigates charges of abuse; Bud faces a daunting challenge.

After traveling to Texas to escort a key witness to the trial of an infamous arms dealer, Sonja and Special Agent Pride are ambushed.

In May of 2007, 15 year old Jordan Manners was gunned down in a hallway, marking the first time a student was shot and killed inside a Toronto school and Catherine McDonald remembers the murder, its impact on the community and his family.

Andy and Swarek come across a car accident while pursuing a child and his kidnapper; Chris fights with Dov over an indiscretion; Andy worries life is passing her by.

An undercover training exercise challenges Andy, Dov and Traci; Gail and Chris find a tied-up teenager at a graveyard.

Ray becomes jealous when Fraser gets all the media attention during a terrorist's trial, but both lawmen take center stage after they are held as hostages.

Fraser develops amnesia when he is thrown from the back of a speeding van, and Ray struggles to help his partner regain his memory.

In Groton, Vermont, a young man with a developmental disability leaves work and is never seen again; with no leads in sight, investigators must rely on surveillance footage to piece together the truth behind Christopher Gray's disappearance.

Detectives rely on surveillance footage at a hospital in Tyler, Texas, when patients mysteriously start dying in the intensive care unit.

Harm and Mac are assigned to prosecute three sailors who are charged with the brutal beating of a man whom they claim raped their shipmate.

McGarrett and Kono suspect that an abused young girl may be the victim of a sex trafficking ring on the Island; Chin and Grover investigate a murder at a sober living facility.

The Five-0 helps a private investigator in the case of a kidnapped woman whose husband may have something to hide; Rachel tells Danny that she is getting a divorce from Stan.

Dr. Cyril Taft finds key evidence when he is assigned to surgical duty for a suspect.

Personal plans are interrupted when errors are found in what seemed to be a straight-forward, closed case; McGee and Delilah argue whether work should be discussed during dinner.

Eric witnesses his friend, a computer systems expert, being attacked by people who want information that could redirect a missile; Kensi runs into a familiar face in Afghanistan.

After learning that the Taliban may be responsible for Special Agent Kensi Blye's disappearance, Hetty sends the team to Afghanistan to rescue her.

Harm learns that he will be denied his promotion and be subjected to a court martial after an old letter he wrote criticizing the president is published.

During a blackout in New Orleans, Pride is determined to figure out who murdered a family friend's fiance.

McGarrett and Kono suspect that an abused young girl may be the victim of a sex trafficking ring on the Island; Chin and Grover investigate a murder at a sober living facility.

The Five-0 helps a private investigator in the case of a kidnapped woman whose husband may have something to hide; Rachel tells Danny that she is getting a divorce from Stan.

Ziva's undercover assignment turns deadly when the serial killer she is tracking becomes suspicious of her.

Jimmy Palmer becomes the target of a killer who only he can recognize.

Eric witnesses his friend, a computer systems expert, being attacked by people who want information that could redirect a missile; Kensi runs into a familiar face in Afghanistan.

After learning that the Taliban may be responsible for Special Agent Kensi Blye's disappearance, Hetty sends the team to Afghanistan to rescue her.

Harm and Mac are assigned to prosecute three sailors who are charged with the brutal beating of a man whom they claim raped their shipmate.

During a blackout in New Orleans, Pride is determined to figure out who murdered a family friend's fiance.

At 29 years old, Lisa Mitchell and her common-law husband, Allan, had two children and she juggled two jobs to try to make ends meet and then one day, she disappeared, leaving her common-law husband and two children behind.

A vigilante steals Gail's uniform from her car; a drug deal gone wrong provides clues to Chris and Dov; Andy and Sam's inability to stay away from each other endangers Swarek.

Andy tries to uncover what happened to Swarek -- who is being held captive by a gangster; events triggered by the investigation incriminate one of the rookies' own.

Fraser returns from vacation to a blazing apartment and a new partner, Stanley Ray Kowalski.

Fraser helps Kowalski confront a demon from his past; Internal Affairs investigates the detective division.

Detectives rely on surveillance footage at a hospital in Tyler, Texas, when patients mysteriously start dying in the intensive care unit.

In Texas, on Christmas Eve 2010, a woman gets a mysterious phone call at work and speeds home to find her 12-year-old son gone without a trace; investigators look at those closest to the boy, but only surveillance footage can lead them to the truth.

Bud's first big case involves a Navy SEAL who is being held liable in the deaths of three U.N. peacekeepers.

McGarrett and the Five-0 are captured while tracking a dangerous nemesis to the island of Lanai; Grover takes his son to Chicago, where he testifies against a dirty cop.

McGarrett works the murder case of one of the last survivors of the USS Arizona; Adam uncovers bone fragments at his new construction job.

After an American couple is attacked in Iraq, Gibbs questions the lone survivor of a Special Ops group that was attacked months earlier in the same area.

When a Navy officer is murdered, the team must determine whether the man's wife or mistress is lying; a homeless woman believes Anthony DiNozzo Sr. is her father.

Nell joins Deeks in the field on a case involving a former Marine who is being tracked by al-Qaida after embezzling money from Iraq.

When an undercover NCIS agent is suspected of working for the smuggler he's supposed to be investigating, the team takes him into custody to find his true intentions.

Harm is presented with a tough case when his former radio intercept officer is charged with dereliction of duty following the crash of a tomcat fighter.

A Marine's murder reveals new clues in the first case LaSalle and Pride worked together; a Thanksgiving celebration at Pride's bar.

McGarrett and the Five-0 are captured while tracking a dangerous nemesis to the island of Lanai; Grover takes his son to Chicago, where he testifies against a dirty cop.

McGarrett works the murder case of one of the last survivors of the USS Arizona; Adam uncovers bone fragments at his new construction job.

The team hunts for the killer of a special agent and suffers grave consequences.

The team hunts for the killer of a special agent and suffers grave consequences.

Nell joins Deeks in the field on a case involving a former Marine who is being tracked by al-Qaida after embezzling money from Iraq.

When an undercover NCIS agent is suspected of working for the smuggler he's supposed to be investigating, the team takes him into custody to find his true intentions.

Bud's first big case involves a Navy SEAL who is being held liable in the deaths of three U.N. peacekeepers.

A Marine's murder reveals new clues in the first case LaSalle and Pride worked together; a Thanksgiving celebration at Pride's bar.

Teenage sisters Marsha and Tamara Ottey were stabbed to death in August 1995; months later, Dimitrija Trajceski became the first TTC worker killed on the job; Caryn Lieberman shares the story of how these two families' lives became intertwined.

After a three-month suspension, Andy faces an official tribunal that will decide if she should be reinstated; a drunken driver (William Shatner) with a grudge against the police causes a multicar crash.

While tracking down a police car stolen by students as a prank, Andy and Swarek pick up the trail of a teen who robbed and assaulted a local criminal.

Fraser and Kowalski try to thank a man for saving a boy's life and inadvertently reveal his identity as a federal witness.

Fraser and Kowalski protect Kowalski's ex-wife and her new boyfriend, a politician who has been receiving death threats.

In Texas, on Christmas Eve 2010, a woman gets a mysterious phone call at work and speeds home to find her 12-year-old son gone without a trace; investigators look at those closest to the boy, but only surveillance footage can lead them to the truth.

In a Calgary pub in 2010, 36-year-old barman Dexter Bain is brutally slain during a failed robbery; detectives use surveillance footage from a nearby store to find the suspect and stage a filmed sting operation to prove who pulled the trigger.

While searching for Agent Clayton Webb's killer, Harm and Mac stumble upon a rogue government spy agency.

Danny protects a coma patient who was the key witness from his last case at the Hawaiian Police Department.

McGarrett gets a tip that someone is plotting a terror attack on Oahu; Chin and Abby face a difficult decision.

After Special Agent DiNozzo's identity is stolen, the perpetrators use his name to begin blackmailing senators.

NCIS teams up with the FBI and Homeland Security to pursue two escaped British prisoners, one of them a former spy, who have crossed international borders.

When software for a new, unmanned aerial vehicle goes missing and the lead engineer's 10-year-old daughter disappears, Sarah is convinced the two are related.

The team investigates when a news reporter names the people responsible for a deadly explosion at a charity event sponsored by the military.

Harm meets an interesting woman from his father's past when he goes to the Vietnam Memorial on Christmas Eve to pay his respects.

Wade's adopted son becomes a suspect after a series of Christmas burglaries turn deadly; Brody and LaSalle tease Sonja about the team's holiday gift exchange.

Danny protects a coma patient who was the key witness from his last case at the Hawaiian Police Department.

McGarrett gets a tip that someone is plotting a terror attack on Oahu; Chin and Abby face a difficult decision.

Naval Criminal Investigative Service Special Agent Leroy Jethro Gibbs leads a group in investigating crimes -- ranging from murder and espionage to terrorism -- that have evidence connected to Navy and Marine Corps personnel.

The team travels to Guantanamo Bay in Cuba to probe a Navy translator's death caused by swallowing emeralds smuggled from Afghanistan.

When software for a new, unmanned aerial vehicle goes missing and the lead engineer's 10-year-old daughter disappears, Sarah is convinced the two are related.

The team investigates when a news reporter names the people responsible for a deadly explosion at a charity event sponsored by the military.

While searching for Agent Clayton Webb's killer, Harm and Mac stumble upon a rogue government spy agency.

Wade's adopted son becomes a suspect after a series of Christmas burglaries turn deadly; Brody and LaSalle tease Sonja about the team's holiday gift exchange.

Kimberlee hasn't been heard from since 2016; her partner says she left and abandoned the family and her parents accuse him of murder; Rumina Daya investigates this unsolved case that's testing the limits of international justice.

When Dov walks into a robbery in progress and shoots a black teen, the community calls for him to be investigated.

Traci worries that she mishandled the investigation into a car accident that yielded a dead body; Chris realizes he has feelings for Gail.

Kowalski and Fraser begin an investigation that reveals the dark side of boxing after one of Kowalski's students injures someone in the ring.

While the police force is on strike, Fraser and Kowalski help a bounty hunter find a bail jumper from Montana.

In a Calgary pub in 2010, 36-year-old barman Dexter Bain is brutally slain during a failed robbery; detectives use surveillance footage from a nearby store to find the suspect and stage a filmed sting operation to prove who pulled the trigger.

In 2016, father Craig Rideout is reported missing after a strange home intrusion; within hours, police find a body matching Craig's description fifty miles away; using surveillance footage and forensics, detectives unravel an unbelievable plot.

Lt. Curtis Rivers is captured by separatists who threaten to hang him for his apparent part in the death of a 14-year-old boy.

McGarrett risks his life when Five-0 attempts to rescue the young girls trapped in the sex trafficking ring they have been tracking; Kono makes a life-changing decision.

McGarrett and Danny recruit Tani Rey to join the task force when a hacker releases a dangerous arsonist from prison.

Gibbs suspects that a 14-year-old who stopped a home invasion is holding back information; Vance and Fornell head to London as part of the case involving the escaped British spy.

The FBI and M16 continue their international manhunt as the escaped British spy leaves one agent fighting for his life in the ICU.

The team discovers the cartel's plan to transport cocaine to the U.S. from Colombia using a submarine; Hetty must go to Washington.

The team tries to find Callen and Sam, who are trapped in a submarine set by terrorists to hit an aircraft carrier in San Diego; against orders, Hetty forgoes her trip to Washington.

While tutoring law students, Harm and Mac come across a miscarriage of justice in an old case involving Chegwidden.

Special Agent Pride and the team investigate a Russian sleeper agent involved with Abby's brother; Sebastian goes to Washington, D.C., to work with Abby; Bishop drives all night to deliver a package and help the New Orleans team.

McGarrett risks his life when Five-0 attempts to rescue the young girls trapped in the sex trafficking ring they have been tracking; Kono makes a life-changing decision.

McGarrett and Danny recruit Tani Rey to join the task force when a hacker releases a dangerous arsonist from prison.

Gibbs discovers a shocking connection between the murder of a naval officer and the director's decision to disband his team.

DiNozzo's investigation into a Navy lieutenant's suicide takes a surprising and deadly turn when it seems that it has a connection to a larger scheme.

The team discovers the cartel's plan to transport cocaine to the U.S. from Colombia using a submarine; Hetty must go to Washington.

The team tries to find Callen and Sam, who are trapped in a submarine set by terrorists to hit an aircraft carrier in San Diego; against orders, Hetty forgoes her trip to Washington.

Lt. Curtis Rivers is captured by separatists who threaten to hang him for his apparent part in the death of a 14-year-old boy.

Special Agent Pride and the team investigate a Russian sleeper agent involved with Abby's brother; Sebastian goes to Washington, D.C., to work with Abby; Bishop drives all night to deliver a package and help the New Orleans team.

An accomplished dancer, an aspiring urban planner, two talented musicians, and a young man who was well on his way to becoming a humanitarian became victims of the biggest mass killing in Calgary's history.

Andy answers a domestic disturbance call to find the social worker on the scene is her estranged mother; Sam, Nick, Chris and Gail search for a mother and her two children; a stash of guns recovered by Detective Barber turns up on the streets.

Oliver Shaw's teenage daughter, Izzy, witnesses the brutal stabbing of a homeless squatter; when Izzy goes missing, officers rush to track her down.

Kowalski, Welsh and Thatcher (Callum Keith Rennie, Beau Starr, Camilla Scott) all witness a murder at the mall, but can't agree on who did it.

When Fraser's friend intercepts a secret message, Fraser and Kowalski become entrapped in a deadly arms transaction.

In 2016, father Craig Rideout is reported missing after a strange home intrusion; within hours, police find a body matching Craig's description fifty miles away; using surveillance footage and forensics, detectives unravel an unbelievable plot.

An escaped inmate murders Debra Johnson, a highly respected Correctional Administrator, at her home outside the prison; with the public at risk, police scour through surveillance footage for clues to hunt him down before he strikes again.

When Harm and Mac investigate an international incident on a nuclear submarine, their relationship is tested by the cramped quarters.

In 1977, the neighborhoods of Los Angeles were turned upside down by a series of gruesome strangulation murders, leaving the police to face mounting public pressure to identify the faceless killer and protect the city's women.

Two college students are found dead in Bellingham, Washington a year after the Hillside Strangler murders in Los Angeles come to an end; local security guard Ken Bianchi arouses suspicion after being caught in a string of lies.

An explosive revelation in Bellingham and clues in LA lead investigators to a second Hillside Strangler suspect; as authorities close in on Ken Bianchi's alleged accomplice, a clue from his psychiatric interview tapes leads to a stunning discovery.

As Angelo Buono's trial begins, all eyes are on Ken Bianchi as the state's key witness, but as Bianchi's credibility crumbles, so does the prosecution's case.

As CSI members investigate the murder of a Navy contractor involved with selling confidential data, they find that one of their own is compromised.

A member of the team is targeted by the Department of Justice; Hetty receives disturbing news from Director Leon Vance.

Mac and Brumby find themselves defending positions with which they don't agree in the appellate trial of a Marine accused of killing three fellow servicemen.

Ziva has a tense reunion with her father, the head of Mossad; Gibbs is forced to make a shocking decision.

In 1977, the neighborhoods of Los Angeles were turned upside down by a series of gruesome strangulation murders, leaving the police to face mounting public pressure to identify the faceless killer and protect the city's women.

Two college students are found dead in Bellingham, Washington a year after the Hillside Strangler murders in Los Angeles come to an end; local security guard Ken Bianchi arouses suspicion after being caught in a string of lies.

An explosive revelation in Bellingham and clues in LA lead investigators to a second Hillside Strangler suspect; as authorities close in on Ken Bianchi's alleged accomplice, a clue from his psychiatric interview tapes leads to a stunning discovery.

As Angelo Buono's trial begins, all eyes are on Ken Bianchi as the state's key witness, but as Bianchi's credibility crumbles, so does the prosecution's case.

In 1977, the neighborhoods of Los Angeles were turned upside down by a series of gruesome strangulation murders, leaving the police to face mounting public pressure to identify the faceless killer and protect the city's women.

Ziva has a tense reunion with her father, the head of Mossad; Gibbs is forced to make a shocking decision.

What started out as a party to mark the end of classes at the University of Calgary ended in a horrific tragedy; to add to the complexity of the case, investigators quickly learned the suspect was the son of one of their own.

After losing a key witness in an upcoming trial, officers from 15 Division must turn to a man who claims to be psychic.

When a pattern emerges among several cases of missing women, Gail goes under cover to investigate; Dov and Chris discover a body, leading them to believe Gail is in danger.

During a night of full-moon madness, Ray punches a hole in the interrogation room wall and finds a perfectly preserved corpse.

Fraser must find a flight attendant's killer before her RCMP father starts an international incident.

An escaped inmate murders Debra Johnson, a highly respected Correctional Administrator, at her home outside the prison; with the public at risk, police scour through surveillance footage for clues to hunt him down before he strikes again.

In 2017, police find 51-year-old Jorge Rodriguez wandering the streets with gunshot wounds near a crashed car riddled with bullet holes; to get justice for Jorge's heartbroken daughters, they follow a trail of CCTV left by the mysterious suspect.

Harm and a Navy Reserve pathologist investigate the death of a child whose body was found on a military base.

The first three participants enter Pitt County Detention Center in North Carolina to begin their 60 days inside the jail.

As two more participants enter Pitt County Detention Center, some may already be wavering on their commitment to make it through quarantine.

Jamil and Steven enter general population, and as a new volunteer enters the Pitt County Detention Center, another participant questions their decision to continue with the program.

Suspicions mount and pressure builds as the participants try to focus on their missions and keep their cover.

A desperate search begins when the team learns that one of their own is being targeted; Nate Getz tries to help Nell recover from her traumatic experience.

After a shooting at the Department of Defense, Callen and Sam go to Mexico to hunt for the only employee who managed to escape.

Harm is trapped in the brig aboard a sabotaged and sinking ship with an accused murderer and his guard.

With the weight of the past on their minds, Gibbs and the team go back to work, with DiNozzo and McGee beginning a search for Ziva's replacement.

The first three participants enter Pitt County Detention Center in North Carolina to begin their 60 days inside the jail.

As two more participants enter Pitt County Detention Center, some may already be wavering on their commitment to make it through quarantine.

Jamil and Steven enter general population, and as a new volunteer enters the Pitt County Detention Center, another participant questions their decision to continue with the program.

Suspicions mount and pressure builds as the participants try to focus on their missions and keep their cover.

The first three participants enter Pitt County Detention Center in North Carolina to begin their 60 days inside the jail.

As two more participants enter Pitt County Detention Center, some may already be wavering on their commitment to make it through quarantine.

Jamil and Steven enter general population, and as a new volunteer enters the Pitt County Detention Center, another participant questions their decision to continue with the program.

Suspicions mount and pressure builds as the participants try to focus on their missions and keep their cover.

In 1981, Kelly Cook took a job to babysit for someone named Bill Christensen; the 15-year old girl was never seen alive again; featuring an exclusive interview with the original target of Bill Christensen.

When Dov and Chris discover a missing girl's body in a ravine, Detective Luke Callaghan returns to oversee the investigation; when the officers learn that Gail has been abducted, they rally to track down her captor.

The officers try to prevent dangerous fallout when a laptop containing sensitive information is stolen; a wedge is driven between Sam and Andy.

After Kowalski is framed for the murder of a crime boss, Fraser places him under arrest at the Canadian consulate.

The case of a murdered sailor, $100 million in gold bullion and a ghost ship in the Great Lakes Triangle tests feuding Fraser and Kowalski.

In 2017, police find 51-year-old Jorge Rodriguez wandering the streets with gunshot wounds near a crashed car riddled with bullet holes; to get justice for Jorge's heartbroken daughters, they follow a trail of CCTV left by the mysterious suspect.

Brianna Foisy, 21, and Jason Netter, 41, are killed on an Alaskan bike path in 2016; it's a crime that baffles police, until similar murders begin to happen; police follow clues in a shocking murder to track the killer.

A civilian electronics specialist is suspected of sabotage when an aircraft carrier loses power while in a no-fly zone of the Persian Gulf.

The team enlists an old friend when a crime boss is murdered, triggering revenge killings across the island; MacGarrett and Danny work out details concerning their new restaurant venture.

McGarrett and the team work with an injured police dog that is the only witness to an ambushed drug bust; a former SEAL looks to join the task force.

NCIS, FBI and MI6 continue the worldwide manhunt for a British spy who is targeting current and former agents.

The team investigates a car explosion with a connection to an agent who went missing six months earlier; Gibbs asks NCIS Special Agent Alex Quinn to shadow his team.

Callen and Granger try to clear Sam's name after he's arrested for a woman's murder; Kensi and Deeks find a link between the victim and Sam's past.

The team suspects a terrorist group is responsible when a man is murdered by a small drone; Nell tries to avoid disaster in Long Beach.

Harm, Mac and Bud assist Mic Brumby in Australia, representing a U.S. Naval officer who exchanged identities with a man he killed 28 years ago.

The staged suicide of a petty officer turns out to be murder; the team secretly works on an online dating profile for Pride.

The team enlists an old friend when a crime boss is murdered, triggering revenge killings across the island; MacGarrett and Danny work out details concerning their new restaurant venture.

McGarrett and the team work with an injured police dog that is the only witness to an ambushed drug bust; a former SEAL looks to join the task force.

A distinguished senator asks Gibbs for help in solving the murder of a young female Naval officer.

When a murder investigation leads the team to Gibbs' hometown, secrets about his past are revealed.

Callen and Granger try to clear Sam's name after he's arrested for a woman's murder; Kensi and Deeks find a link between the victim and Sam's past.

The team suspects a terrorist group is responsible when a man is murdered by a small drone; Nell tries to avoid disaster in Long Beach.

A civilian electronics specialist is suspected of sabotage when an aircraft carrier loses power while in a no-fly zone of the Persian Gulf.

The staged suicide of a petty officer turns out to be murder; the team secretly works on an online dating profile for Pride.

New leads in the 10 year old case of a 42-year-old nurse brutally murdered in her home; her family questions why it is taking so long to make an arrest.

Andy and Nick investigate when a neighborhood drug lord threatens a priest's life; a young drug-runner's refusal to turn informant leads Traci to make a decision about her career; Chris and Swarek butt heads; Dov's relationship takes a dark turn.

A chaotic night at the station leads to an investigation by Internal Affairs; Gail struggles to recover from her harrowing abduction; Andy discovers a secret about Nick's past.

The case of a murdered sailor, $100 million in gold bullion and a ghost ship in the Great Lakes Triangle tests feuding Fraser and Kowalski.

Ray and Kowalski help a small-town sheriff when the town's baseball team becomes a target of sabotage attempts.

Brianna Foisy, 21, and Jason Netter, 41, are killed on an Alaskan bike path in 2016; it's a crime that baffles police, until similar murders begin to happen; police follow clues in a shocking murder to track the killer.

33-year-old Michael Scott is shot dead on the streets of downtown Baltimore; detectives are in a race against time to find the gunman before he strikes again; a trail of cameras lining the city's streets and buses may lead police to the killer.

In Bud's first case as a JAG attorney, he goes up against prosecutor Harm to defend his estranged father.

When the HPD system is hacked and one of the Five-0's informants ends up dead, McGarrett enlists the help of hacker Aaron Wright, whom he just imprisoned.

At Halloween, the team investigates a string of murders that mirrors stories from well-known Hawaiian folklore; Grover visits a man who is hours away from execution and may hold the key to a case that has plagued Grover for years.

While investigating a murder at a Quantico reunion, the NCIS team uncovers a bomb plot and a long-running theft ring; Torres and Quinn adapt to their new lives on Gibbs' team.

When a Marine falls to her death, the woman's doctor (Laura San Giacomo) tells Gibbs that she thinks the woman was murdered.

When Deeks and Kensi go under cover to investigate the murder of a homeless man -- who used to be a Marine and CIA agent -- they find a connection to a Mexican cartel.