When an off-duty diplomatic security agent is fatally shot in New York City trying to apprehend someone, the team investigates if there's a connection to his time working in Croatia.

Maggie calls in Remy to aid Scola in his undercover mission to find the terrorists believed to be responsible for the imminent attack in New York.

Team Scorpion must move Happy's friend Ada, and the sterile bubble Ada lives in that protects her compromised immune system, to a secure location after a severe storm leaves the structure surrounded by dangerous debris.

To stop a dangerous virus from spreading, Team Scorpion must locate an endangered monkey in the Amazon that has the antibody for the cure; Toby and Happy see a counselor to prepare for matrimony.

The team races to save Paige and Happy when a wire supporting the gondola they are in during a mission to repair a turbine at a wind farm snaps.

Anthony DiNozzo Sr. (Robert Wagner) is found in a car with no memory of the previous night and a dead body in the trunk; Tony goes against orders as he tries to establish his father's innocence.

When a Navy captain is killed, the team must find and protect his pregnant companion; Jimmy brings his fiancée's father to work.

The investigation of a Navy commander's murder leads the team to E.J. Barrett, and a second death prompts the team to protect E.J. as they hunt the killer.

When a BAU member gets in trouble in Mexico, the team enlists the services of the International Response Team for help.

The BAU looks into the cause of several fatal car crashes involving drivers and pedestrians; Reid gets bad news.

The BAU investigates a series of disfiguring acid attacks on young men and women; Dr. Reid begins to settle into his new surroundings.

A mother steps forward with valuable information for the BAU to aid in their investigation of an unsub known as the bone crusher; Reid must adapt to a new set of rules in prison.

The BAU believes two unsubs may be operating simultaneously when victims killed in two different ways are discovered in the same city; the team grapples with keeping Reid safe in prison.

The BAU investigates an urban vampire who kidnaps his victims at night and holds them underground in the sewer system; Reid makes a difficult decision in prison.

The BAU is called to investigate after three victims are discovered tied to stakes in the brutal Arizona desert.

The BAU investigates when several federal government employees, including a close friend of Walker's, succumb to symptoms of a heart attack; Reid anxiously awaits his trial date.

Sebastian calls the team to assist with a possible kidnapping case when a dignitary's son he was assigned to protect disappears from a local concert venue.

After Eddie Barrett provides an alibi witness, Pride and the team are more determined than ever to find a break in the case and avenge LaSalle's murder.

Pride is cut off from the team and backed into a corner after the investigation into Eddie Barrett uncovers a malicious plot.

The team is concerned when Sebastian becomes unreachable while undercover as a new recruit.

When the deputy commander of an Air National Guard Base is kidnapped, the team must work quickly to find the suspect along with stolen ammunition; Scola questions his own safety in the aftermath of a recent traumatic experience.

When a trucker is gunned down after a routine trip from Canada, all signs point the team to a noted criminal on the FBI's Most Wanted Terrorists list; Jubal gets to work with an old friend and colleague, Detective Jack Lombardo.

A drug dealer is shot in a federal park and the team sets out to look for his killer; Maggie's sister returns to New York and complicates the case.

All eyes are on the team when it tries to find out who kidnapped the only child of a prominent U.S. senator; the abduction also uncovers a potential link to a similar case that was pushed to the side by local authorities.

After finding a group of teens dead from a drug overdose, the team races to find the dangerous dealer and his supplier; OA questions where he stands in his faith.

When a prominent doctor is found dead in a ritualistic slaying, the team must race against time to hunt down a religiously motivated serial killer; Scola faces a life-or-death decision.

Detectives investigate a possible connection between the deaths of two homeless men, who died within a day of each other.

A former senator becomes a suspect when his ex-wife is found dead at her home the night after attending a fundraiser with the family.

Detective Cyrus Lupo leaves terrorist regions to return to his own family terror at home.

During a blackout, a panic-button alert sends detectives Green and Lupo to the home of a high-level executive, whose wife and daughter are missing and whose housekeeper has been murdered.

An explosion injures a pregnant guard and exposes a scientist's controversial research.

A dry-cleaning mix-up leads to a murdered attorney and a trail of corporate corruption and greed.

When a teenage boy and a young girl are found dead near a neighborhood playground, Detectives Cyrus Lupo and Ed Green have trouble getting witnesses to talk after they realize the boy was targeted, and the girl was killed accidentally.

When three roommates are found dead in their apartment, the initial investigation suggests a murder-suicide, but the relationship of one of the victims with a prominent figure shifts the focus to a political fundraiser.

After a mother and daughter are killed in a hit-and-run accident, Detectives Green and Lupo go undercover to solve the case.

An auxiliary police officer makes an overzealous attempt to stop a riot at an immigration rally, but it causes a woman's death.

When a doctor is found murdered in his hotel room, a surveillance tape reveals that a different doctor might have been the intended target.

When a high-school girl is found dead, information leads detectives to a drug-addicted prostitute with an affluent past; when the case goes to trial, Connie Rubirosa seems to have an unrelenting admirer in the jury pool.

Detectives find no shortage of possible suspects when a psychiatrist who treats disturbed teens is found shot to death in his office.

The police break up a dog-fighting ring and discover a woman's finger inside one of the dead animals; detectives plot to trick an ambitious reporter.

The team must track down a mysterious female assassin responsible for murders in Athens, Rome and London; Wade's son begs her to allow him to go on a police ride-along for an article he's writing on a youth outreach program.

The team investigates the murder of a JAG captain who was discovered at home by his daughter, the only heir to his large estate; Sebastian is intimidated when he is put in charge of a team on his first day of training.

When Pride is unable to sleep due to continuing nightmares about the mysterious man in the red suit; he undergoes a specialized treatment to help him figure out the man's identity; an arrogant new officer joins the team.

Tammy must protect a teenage girl after her father is shot in their home; the rest of the team searches for a motive.

As NCIS investigates the cause of death of a reservist Navy SEAL surgeon, they're forced to bring Vance's daughter to help with a highly dangerous mission.

Parker's delinquent past resurfaces when NCIS is called to Philadelphia to investigate the death of a Navy petty officer.

A gruesome mishap at a Navy petty officer's gender reveal party leads NCIS to the case of a missing teacher who was popularized on a true-crime podcast.

NCIS investigates the apparent suicide of a retired Navy officer who was in Palmer and Knight's grief group; Torres gets a call from NCIS Special Agent Jane Tennant to come to Hawaii.

When an infamous arms dealer is released from prison and bodies start piling up, Torres is forced to face the repercussions of his actions during an undercover operation he worked on years ago.

NCIS investigates a ring of clever teenage partygoers when a string of break-ins takes place at Marine Base Quantico; while working the case, agent McGee forms a bond with one of the teens.

NCIS investigates the unexpected death of a Navy reservist who was an investigative journalist; Knight and Jimmy's budding romance is put on hold when a vital organ transfer goes fatally wrong.

When Parker is framed for murder, the team members put their jobs and lives on the line to buy time and uncover the truth.

John Gustafson (Jack Lemmon) and Max Goldman (Walter Matthau) are two curmudgeonly neighbors who have been at each other's throats for years. The rivalry of the former friends intensifies when Ariel (Ann-Margret) comes along and provides a love interest for both of them. When Max finds out that John is experiencing family troubles and financial ruin, however, he steps in to help. Their bond is further cemented when John has a health scare and Max makes the ultimate sacrifice for his friend.

Elderly, angling and contentious friends Max (Walter Matthau) and John (Jack Lemmon) back-burner their bickering when their kids (Kevin Pollak, Daryl Hannah) get engaged, but fishing season opens a can of romantic worms as newcomer Maria (Sophia Loren) plans to turn their beloved bait shop into a restaurant. Botched matchmaking leads to some major romantic mix-ups, until an unexpected death in the family helps everyone realize that the most important thing in life is love.

Fun-loving salesmen Richard and Larry are invited by their boss, Bernie, to stay the weekend at his posh beach house. Little do they know that Bernie is the perpetrator of a fraud they've uncovered and is arranging to have them killed. When the plan backfires and Bernie is killed instead, the buddies decide not to let a little death spoil their vacation. They pretend Bernie is still alive, leading to hijinks and corpse desecration galore.

John Gustafson (Jack Lemmon) and Max Goldman (Walter Matthau) are two curmudgeonly neighbors who have been at each other's throats for years. The rivalry of the former friends intensifies when Ariel (Ann-Margret) comes along and provides a love interest for both of them. When Max finds out that John is experiencing family troubles and financial ruin, however, he steps in to help. Their bond is further cemented when John has a health scare and Max makes the ultimate sacrifice for his friend.

Elderly, angling and contentious friends Max (Walter Matthau) and John (Jack Lemmon) back-burner their bickering when their kids (Kevin Pollak, Daryl Hannah) get engaged, but fishing season opens a can of romantic worms as newcomer Maria (Sophia Loren) plans to turn their beloved bait shop into a restaurant. Botched matchmaking leads to some major romantic mix-ups, until an unexpected death in the family helps everyone realize that the most important thing in life is love.

When a man impersonating LaSalle attempts to free a young woman from jail, the team investigates both the impostor and the prisoner; Pride's daughter pays him a surprise visit.

Racial tensions rise in New Orleans when a white officer shoots a black Navy officer he believed was armed in the middle of a busy street party.

When a Navy sailor is found dead, the team tracks the suspicious movements of people in his life prior to his death; Hannah comes to terms with her daughter's relationship with her ex's new girlfriend.

When Sebastian is injured while unsuccessfully trying to prevent a kidnapping, NCIS races to find the missing woman and her abductors; the team gets a peek into Agent Carter's personal life.

The team investigates the death of a Naval microbiologist whose hobby as a "myth buster" resulted in his death at the hands of a legendary bayou creature; Agent Khoury conducts an investigation into previous actions of Deputy Director Van Cleef.

As New Orleans grapples with the effects of COVID-19, Pride sends Tammy and Carter to investigate a suspicious death aboard an offshore humanitarian ship; Wade is overwhelmed by the high volume in the morgue due to COVID-19.

Tammy and Carter continue to investigate a suspicious death aboard a COVID-infected humanitarian ship; Pride and the team discover what may be the key to finding the killer; Wade helps a grieving woman.

With Special Agent Alden Parker still on the run with his ex-wife, the team investigates who from his past might have a personal vendetta against him in hopes of clearing Parker's name.

McGee's personal life and professional life intersect when a dad from his children's school is linked to a break-in at a government storage bunker.

When a dead body is found at an ancient burial site that is thought to be cursed, the team tries to determine the motive and the symbolism behind the crime; as Torres continues therapy with Dr. Grace, he discovers that their lives are in danger.

Agent Knight's past resurfaces when her ex-boyfriend, a National Parks Service agent, teams up with NCIS to investigate a campsite murder.

Agent Parker steps up to protect director Vance after a terrifying home invasion; the team detects advancements in Jessica and Jimmy's blossoming romance.

NCIS investigates the death of a Navy lieutenant whose body was found at a construction site; Ziva thinks about her future.

Gibbs questions the choices he has made during the course of his life when a man pulls a gun on him at a diner.

A dead Navy captain dressed in an unusual costume underneath his uniform leads the team to discover a secret society; DiNozzo is forced to work with his ex-fiancee (Perrey Reeves).

Gibbs clashes with Dr. Samantha Ryan (Jamie Lee Curtis) of the PsyOps Division when a Navy reservist is found dead from a suspected suicide; DiNozzo sees McGee's paycheck.

Security at a Naval research laboratory is in jeopardy after a petty officer's murder links to an arms dealer; probationer Ned Dorneget sucks up to Gibbs.

When classified information is leaked, the Secretary of the Navy (Matt Craven) investigates alongside Gibbs and Dr. Samantha Ryan (Jamie Lee Curtis).

The investigation into a petty officer's murder leads the team to its prime suspect: Director Vance's brother-in-law.

When Reid fears his mother has been abducted, he asks the BAU to investigate while he's stuck in prison.

Morgan brings the BAU new information in the case against Mr. Scratch, a serial killer and escaped convict who has been wreaking havoc on the team.

Agent Matt Simmons joins the BAU team in a race to take down Mr. Scratch and save one of their own in the process.

The BAU investigates three similar crimes in which victims' remains are discovered in old suitcases.

The BAU investigates a workplace shooting committed by a state-of-the-art drone in Silicon Valley.

When an anger-driven, unknown subject targets successful businessmen in Detroit, the BAU must investigate.

The BAU must find out what several missing women have in common to find them.

Morgan returns to the BAU to help Penelope deal with a case that has affected her emotionally.

Pride and the team take on a group of dirty cops when they discover that a murder victim was also a key witness in multiple excessive force cases; Tammy faces the reality of being in a new relationship.

The team continue to investigate the murder of an officer who was about to blow the whistle on police misconduct; Pride must get creative in order to finally get rid of the dirty cops; the mayor asks Pride to join her new task force.

The team investigates a suspicious death and the missing key piece of evidence is a top secret, high-tech battery; Pride and the team realize there could be deadly consequences if it falls into the wrong hands.

When a torpedo hits a fishing trawler at sea, the entire Gulf Coast is in jeopardy as Pride and NCIS race to find the submarine before it can strike again.

A Navy therapist who is working to get justice for victims of sexual assault is murdered; Carter's mother confronts him when he refuses to talk to the FBI for a background check on her behalf.

As Pride and the team continue the investigation of an officer's assault and the murder of her therapist, NCIS zeroes in on a suspect who's been working the system for years; Carter and his mother talk about how they'll move forward after a mistake.

When an art dealer is found stoned to death, detectives suspect that her killing may be linked to some of the art in her gallery, but a deeper look into her personal life reveals another motive.

When a notorious hustler is found dead, Cyrus Lupo discovers that his partner, Ed Green, is the shooter; internal affairs takes over the case, forcing Green to reveal his troubled past.

Detectives Cyrus Lupo and Kevin Bernard have reason to believe a cult is involved when a novelist is found dead in her car; Assistant District Attorney Michael Cutter has trouble prosecuting when several jury members fear for their own safety.

When a legal aid striker is killed outside the courthouse, the sand in his wounds leads detectives to investigate a greensman; due to the strike and shortage of defense attorneys, Rubirosa and Cutter must face each other in court.

The murder of an automobile mechanic leads detectives to uncover a fraudulent online relationship, a bizarre case of blackmail and money laundering.

The murder of a jeweler leads detectives to an illegal prostitution ring; Jack McCoy's job is threatened.

The beating death of a stockbroker causes a battle of epic proportions between the victim's family and the faction responsible for his death.

A mentally challenged man is reunited with his mother, who gave him away after his brother was killed.

A young woman (guest star Jena Malone) escapes from a polygamous cult.

A crane collapse kills a man, and it may not have been an accident; a rift forms between Jack McCoy and Michael Cutter.

A revered sheriff becomes a possible conspirator in a case involving a murdered tourist.

Detectives Lupo and Bernard investigate when the writer of a best-selling memoir is found dead in a community of male prostitutes.

Cutter is determined to expose misconduct when he realizes an old friend working in the system is obstructing justice in the murder of an environmentalist.

While investigating the murder of two divorce lawyers, detectives Lupo and Bernard uncover a child slave-trade ring.

The murder of the plaintiff in a high-profile lawsuit against a major airline leads detectives to a defense attorney (Dallas Roberts) who is willing to do whatever it takes to ensure his big payday.

When the son and housekeeper of a pair of prominent biologists are murdered, detectives suspect the couple's work on a controversial pharmaceutical study may have made them targets for the killer.

The owner of a trucking company, Vic Russell, is found dead after a business meeting; detectives uncover information that leads them to believe that Russell had ties to the Russian mob.

An NYPD officer kills a troubled fellow officer who took hostages at gunpoint; detectives Lupo and Bernard find valuable stolen documents and a dead body at the man's apartment.

When a bus explosion kills several innocent people, the team jumps into action to take down the responsible terrorist organization; Scola tries to balance fatherhood with the job.

After the president of the NY Fed is gunned down trying to help a young woman in peril, the team races to find the killer and the missing woman.

When a local club owner is found dead, the team works quickly to find the motive behind the murder of a seemingly innocent man; OA is smitten with a new love interest but is concerned that she's mixed up with the wrong crowd.

When a federal judge is gunned down in broad daylight, the team is sent looking for a suspect with ties to a local Islamic center; Maggie reunites with a former colleague.

When the director of a Brooklyn migrant center is abducted and held hostage along with his wife, the team must work quickly to meet the demands of their kidnapper; Maggie picks Jessica's brain about motherhood.

After multiple people are targeted and killed with a poisonous gas in broad daylight, the team races to find the killer; Maggie continues to explore motherhood.

The team defies the orders of a foreign government when it retrieves an asteroid containing DNA strands that could have deadly consequences if they are exposed.

The team attempts to extract a pair of scientists trapped inside a failing and dangerous bio-dome designed for Mars.

After extinguishing a catastrophic tunnel fire, Team Scorpion helps Toby and Happy get to their wedding ceremony.

Tony helps Ziva and her mentor look for a missing Marine lieutenant in Colombia; Jimmy Palmer chooses his best man.

The team works with the Baltimore police to investigate a warehouse fire that revealed missing Navy documents that could potentially threaten national security; Tony reunites with a boy from his past.

An investigation into a fire on a Navy vessel leads to a discovery that elevates security at Navy facilities worldwide; Ziva and DiNozzo are called in when an explosive device is found on a ship in Italy.

The BAU searches for a subject who is targeting prominent members of the community.

The BAU is called in to investigate when a criminal sensationalizes his crimes by giving the local media exclusive footage.

The BAU is called to investigate when two members of a conspiracy group in Roswell, N.M., perish in quick succession.

When a series of backyard pool homicides are reported in California, the BAU team searches for an UnSub who has a puzzling past.

The BAU team's investigation into the home invasion and attempted homicide of a police chief's wife uncovers a world of secrets in a small town in Virginia.

The BAU is called to New York when several casualties of a brutal nature are reported in Central Park.

The BAU is called to investigate a series of homicides in which cryptic messages are found inside the mouths of the victims.

The BAU is called when the New Orleans Police Department discovers a mass grave inside a vandalized above-ground crypt in a local cemetery.

When a petty officer is shot down by a sniper, Pride and NCIS hunt down the killer, only to find that he may not be acting alone; Rita tells Pride that she has been offered a compelling job.

Sebastian's life is in danger when a criminal he put behind bars escapes police custody; Carter is tasked with keeping Sebastian in protective custody; Carter and Hannah's flirtation is fun gossip fodder for Tammy and Sebastian.

After a Molotov cocktail is hurled into Pride's bar, evidence leads him to his old nemesis, Sasha Broussard; Tammy uses her profiling skills on Hannah and Carter with shocking accuracy.

The team investigates the deadly bar bombing and impending criminal turf war involving Sasha Broussard; Pride must come to terms with having Connor in his life; Carter and Hannah work to define their new relationship.

When a bombing at a local restaurant leaves several injured or dead, including a congresswoman and someone close to Isobel, the team races to apprehend the suspect before another explosive goes off.

After an employee of the U.S. Army is shot in an industrial park, the team works to track down the killer who reveals a larger plot at play; Tiffany continues to struggle with the guilt surrounding Hobbs' death.

When a retired FBI agent is tortured and killed while working a security job, Scola and Nina go undercover as a married couple deep in the diamond game as the team tries to find out who is responsible.

After an FDIC security guard is killed while tending to a pregnant woman in distress, the team works to locate the woman and the killer who took her hostage; OA and Isobel worry about Maggie as she navigates taking care of Ella.

The team is thrown into a highly political case after four members of the Taliban are shot and one is kidnapped in New York with no record of their entrance into the country; OA struggles to open up to Gemma about his past in Afghanistan.

When a truck driver is murdered and the drug he was transporting goes missing, the team hunts for those behind the remaining batch that is already wreaking havoc on the streets of New York.

Team Scorpion has little hope for rescue after their plane crash-lands on a remote, deserted island while en route to Toby and Happy's honeymoon.

Tensions run high for members of Team Scorpion when they must overcome personal conflicts to be rescued from the desert island they crash-landed on three weeks earlier.

Team Scorpion must work with their old nemesis Mark Collins to prevent the extinction of mankind; Walter and Paige awkwardly navigate their new relationship.

As the team searches for a terrorist targeting the Navy, a bug is found in a probationary agent's tooth; Jimmy Palmer has a bachelor party.

Shaken by terrorism, the NCIS faces devastating surprises; the case impacts Jimmy Palmer's destination wedding.

Following the bombing of NCIS headquarters, the team engages in a cross-agency manhunt for Harper Dearing.

The FBI's assistant director of national security joins the BAU as it investigates the quadruple homicide of a group of roommates in St. Louis.

The BAU meets in secret to investigate a subject who appears to be kidnapping and photographing young women.

The BAU is called to Oklahoma to investigate a murderous clown who is terrorizing a town.

The BAU travels to Chicago to investigate a case where red roses are left on victims; Rossi gets an unexpected visit from his ex-wife.

The BAU takes charge of a hostage situation at a law firm where Matt Simmons' wife works.

The BAU is called upon when bioterrorism is suspected in a series of mysterious deaths; Garcia visits her stepbrother to take care of a difficult family issue.

The BAU is called to Taos, N.M., when someone targets victims' temporal lobes.

The team questions the credibility of a former FBI agent's bizarre account.

Pride directs the team to link Sasha to the recent attacks in New Orleans; Carter and Tammy search for a stolen highly trained military dog; Pride and Rita make an important decision about their wedding.

Pride and Rita plan their wedding; the FBI arrests Connor in connection to the bar's firebombing.

On the eve of his wedding to Rita -- and Connor leaving for the Witness Protection Program -- Pride must track down who attacked Jimmy and Connor, while he navigates Sasha's ulterior motives regarding her son.

The team investigates the death of a petty officer whom Pride had mentored; Brody searches for a place to call home.

The Somalian terrorist group behind the death of Agent Hobbs resurfaces, sending the team on a chase to take them down for good.

After a bomb explosion devastates a residential apartment building, special agents Maggie Bell and Omar Adom "OA" Zidan of the New York office of the FBI investigate a possible war between rival gangs.

After eight people are fatally poisoned at a deli in New York City, agents Maggie Bell and OA Zidan trace the crime to an unlikely culprit and conduct a sting operation to prevent further attacks.

Special agents Maggie Bell and OA Zidan join the team to investigate the murders of 18 young women, and they get help from a survivor associated with the deceased.

As the body count continues to rise, Maggie Bell and OA Zidan rush to track down an active sniper who has an elusive motive.

Maggie and OA investigate the death of a safety inspector and its possible connection to a leak at a nuclear power plant.

Team Scorpion continues work with their nemesis to prevent humanity's extinction; Cabe's last-minute decision while on the case endangers his career.

When poachers almost kill a pregnant deer, the team tries to save the deer and the fawn; Happy and Toby discuss the future of their family.

While decommissioning an old nuclear missile, an accident causes the team to endure exposure to toxic vapor while trying to prevent the nuke from detonating; Paige confronts Happy about constantly tagging along with her and Walter.

The team investigates when the body of an NCIS facilities manager is found four months after she went missing; as the team faces mandatory psych evaluations, Gibbs is concerned about Abby's recurring nightmares.

Ducky orders the exhumation of a body from a 12-year-old case; the team investigates a Marine's death.

When a helicopter crew's training mission ends in a disastrous crash, the NCIS team must figure out what happened and find the missing pilot; Ziva challenges McGee and Tony to a dare.

When Reid and Garcia are abducted by a mass murderer, it's up to the rest of the team to find them; the BAU looks to their past to solve why the two heroes have been targeted.

The team tracks a serial killer when remains of numerous victims are found in the walls of an elderly couple's home; the hunt becomes urgent after the BAU learns the killer's specific ritual of when to strike; Rossi reconnects with his ex-wife.

Packages with gruesome contents are delivered to six people in the Washington, D.C. area; Simmons and Kristy struggle to connect with their son, David, who is suspended from school for aggressive behavior.

Soon after the BAU steps in to help local law enforcement isolate a suspect for a murder, a second person who is related to the first victim is killed under similar circumstances; Prentiss is concerned about Garcia's behavior.

The BAU investigates a spooky local ghost story of the "Tall Man" and the clues it provides when two people go missing in the woods; a third person mysteriously surfaces the following day with limited details as to what happened to her friends.

The BAU investigates four murders along the eastern seaboard; the crimes become personal for Alvez when the team discovers there are ties to his time spent in pursuit of a notorious hit man; Alvez and his girlfriend decide to move in together.

The BAU races to capture the vigilantes behind a series of attacks taking place every 27 minutes in the nation's capital; Prentiss and Unit Chief Andrew Mendoza lead the effort to identify the vigilantes and what's motivating them.

The BAU investigates a double homicide and kidnapping in New Hampshire; Rossi's plans to elevate his relationship with Krystall don't go as planned.

When a Navy lieutenant on liberty dies of bubonic plague, NCIS Special Agent Tony DiNozzo helps the New Orleans team as they try to control a potential outbreak and find the source of the infectious disease.

An armored transport bus crashes, resulting in the escape of four prisoners -- including a black market broker topping the list of national security threats; Pride needs Gibbs' help with a case file full of redactions.

When a Navy SEAL is found dead in a sorority house, the team must determine if his death was related to collegiate foul play or a classified mission; Pride's daughter visits the office.

The investigation into a chief warrant officer's death reveals that his wife has been abducted -- leaving the team with a 22-hour deadline; senior FBI agent Fornell assists with the case.

After a senator's daughter is kidnapped and held for ransom, the FBI must find the little girl before their time limit expires; they must dig into the senator's past for clues to who did this to his family.

Maggie and OA hunt down a ruthless group of robbers who are posing as police officers to target armored trucks.

Maggie and OA lead the search for an abducted former biological weapons chemist.

After a key witness and a U.S. marshal are ambushed and killed, Maggie and OA must find the man who leaked the information that led to their murders.

When an illegal arms broker-turned-informant is assassinated, OA assumes his identity and goes undercover to stop the sale of dangerous weapons, with help from Maggie and their former FBI instructor.

When a judge and her daughter are murdered after she sentences a man to life in prison, Maggie and OA search for the killer; Dana has a history with the victim and a vested interest in the case.

An unconscious war widow and her lifeless infant are found in the rubble of a bombed Army recruitment center; DA Jack McCoy must make one of the most-unpopular decisions of his career.

Mysterious e-mails from a religious Website lead detectives to the dead body of one of the page's creators; Jack McCoy's political opponent uses the media to attack his reputation.

As detectives investigate the death of a bank executive's mistress, they uncover a kidnapping and extortion plot.

The search for a writer's killer leads detectives to a closed espionage case.

While investigating the murder of a TV reporter, detectives learn that she was involved in a love triangle.

Detective Bernard and Lupo's investigation into a series of hate crimes against Hispanic men leads to controversy.

Detectives Lupo and Bernard have trouble finding a motive when a firefighter and his wife are found tortured and murdered in their new home.

The double murder of two young scientists leads detectives to a jealous, mentally disturbed woman.

Detectives Lupo and Bernard investigate three murders that appear to be the work of a serial killer.

The murder of a well-known charity executive leads detectives down a path of political intrigue.

When a young war veteran is found dead, Detectives Lupo and Bernard connect the murder to an attorney who used to work for the Department of Justice.

Detectives find that DNA evidence seems to link the murder of a CSU investigator and an attack on a young journalist (Camille Chen).

Detectives Lupo and Bernard investigate when an aspiring musician is found dead; a bag of cash leads to multiple suspects.

While searching for the murderer of the adoptive mother of 10 disabled children, detectives uncover a reality-show offer and an affair.

Amidst Halloween festivities in New Orleans, a Naval Staff Judge Advocate dressed in a costume is found dead in a cemetery; the team debates Halloween costumes and activities.

The team investigate the murder of a Navy Officer assigned as a tech liaison with a private developer; Pride turns the carport into an auto shop.

A murdered petty officer -- with a proposal and an engagement ring -- is found in a Mardi Gras float storage facility; the members of the team are baffled when they cannot locate the victim's girlfriend.

The team reopens a cold case when a stolen Navy-issue gun turns out to belong to a chief petty officer who died 40 years ago; the team makes their annual Thanksgiving dinner together.

When an NCIS agent turns up dead and Kasie goes unaccounted for, the team must work quickly to find the killer.

NCIS must investigate the secretary of the Navy when her husband claims she tried to murder him.

After an unknown shooter causes chaos at an annual Thanksgiving 5K, time is of the essence for the NCIS team to find the culprit; Kasie joins Knight for Thanksgiving lunch at Knight's sister's house.

NCIS investigates the death of a college student who was killed while running across the street and had connections to McGee's wife.

NCIS agents from Washington, D.C., Los Angeles and Hawaii, in D.C. to attend the retirement party of a beloved Federal Law Enforcement Training Center professor, find themselves investigating his shocking suicide.

Parker discovers he's a victim of identity theft while investigating the unusual murder of a Navy ensign; Knight and Jimmy face hurdles in their relationship as their connection heightens.

When an old pal of Torres' comes to him -- disheveled and bloodied -- for guidance amidst an undercover FBI operation and then disappears, NCIS helps track him down; McGee prepares to be a contestant on a popular game show.

Parker grapples with his emotions when a con man from his past turns up as a prime suspect in the murder of a navy officer.

Maggie and OA lead the search for an abducted former biological weapons chemist.

After a key witness and a U.S. marshal are ambushed and killed, Maggie and OA must find the man who leaked the information that led to their murders.

When an illegal arms broker-turned-informant is assassinated, OA assumes his identity and goes undercover to stop the sale of dangerous weapons, with help from Maggie and their former FBI instructor.

When a judge and her daughter are murdered after she sentences a man to life in prison, Maggie and OA search for the killer; Dana has a history with the victim and a vested interest in the case.

A murder in Paris' Louvre Museum and cryptic clues in some of Leonardo da Vinci's most famous paintings lead to the discovery of a religious mystery. For 2,000 years a secret society closely guards information that -- should it come to light -- could rock the very foundations of Christianity.

Two young lovers from different backgrounds meet and fall in love on the ill-fated maiden voyage of the unsinkable R.M.S. Titanic.