A petty officer's murder leads the team to a night club where Pride's mother used to perform; Lasalle must return home to Alabama after receiving an unexpected call from his family.

A former kidnapping victim is linked to a series of murders that includes the daughter of an NYPD detective; Kristen begins to doubt her ability as an agent after a training exercise leaves her shaken.

After a businessman with a history of harassment claims against him is killed, the team suspects the killer may be one of his many accusers.

A bank holdup leads the team to a safe deposit box, the contents of which have the potential to destroy national security; Kristen is eager to get back into field work while other team members still have their concerns.

The son of a retired FBI agent is kidnapped, and the team must investigate if it's an act of revenge; Isobel must make a hard call when information from the past comes to light.

When an attorney is found dead near the body of a private escort, the team must piece together what connected the two seemingly random victims; Jubal's connection with one of the victims makes finding the killer much more personal.

After a truck filled with armor-piercing rifles is hijacked, the team works to discover who stole it, and what they have planned for the stolen weapons; a friend from OA's past returns to help with the case, but OA isn't sure he can trust him.

After the police ignore a desperate father's plea for help, he abducts a billionaire's daughter and holds her hostage in a safe room until his own missing child is returned to him; Jubal puts his hostage negotiation skills to the test.

At the last minute, Dr. Carter asks Abby to be his date for his grandfather's (George Plimpton) charity event.

Dr. Greene is angered when a review board questions his competency; Dr. Carter tries to save a boy whose parents neglected to immunize him against measles.

A train wreck has the doctors facing one of the bloodiest traumas of their careers; Dr. Kovac recalls the painful loss of his family.

Dr. Weaver fears her relationship may be exposed when a suicidal woman claims Dr. Legaspi (Elizabeth Mitchell) sexually harassed her.

Benton witnesses a shooting in the ER; Carter and Abby treat children who became sick on their school bus from toxic fumes.

Drs. Greene and Corday encounter problems while trying to make it to their nuptials; Dr. Weaver takes an out-of-town trip after not being invited to the wedding.

Prentiss and J.J. are faced with important decisions to make about their futures as the BAU travels to Texas to investigate a series of murdered businessmen.

Rossi develops some new theories about Everett Lynch, aka The Chameleon; the team sets out on an epic hunt to capture Lynch.

While hallucinating after he gets a brain injury, Dr. Reid is visited by ghosts from his past; the BAU makes a shocking discovery about Lynch that affects Rossi personally; the team comes together to celebrate Rossi's retirement.

The BAU interviews candidates to take the opening left by Kate's departure; the team tracks a serial killer who leaves behind evidence that indicates a person intent on revenge.

The team must find the person responsible for a sarin gas attack on a Los Angeles bus before a larger incident occurs.

The team suspects a jilted unknown subject is responsible when brides are murdered on the eve of their nuptials.

When a robbery-homicide leaves three restaurant employees dead, a cold case that occurred in the same town six years earlier could yield a lead.

A notorious street artist becomes a suspect when corpses are used in macabre graffiti art in Detroit; Dr. Lewis tries to balance work and her relationship with her fiance.

A petty officer is murdered while in town to help a refugee family; Wade works on the special election campaign for Mayor Zahra Taylor that takes place during Mardi Gras.

FBI Special Agent Raymond Isler asks Pride for help with an off-the-books opioids theft investigation he is personally invested in; Percy works under cover as a getaway driver, with Isler as the muscle for a job tied to the case.

A congressional aide disappears after a hit man saves her from two men posing as NCIS agents; LaSalle struggles with life-altering decisions regarding his brother's future.

The team investigates the murder of a Navy captain who was searching for a priceless 200-year-old fleur-de-lis during the annual Louisiana Pirate Festival.

When the team is called to the scene of a murder, it quickly suspects political motivation; Maggie contemplates a decision that could affect her entire career.

Jess LaCroix and his team come to help OA find a fugitive LaCroix arrested years ago after a bus with 26 students goes missing and he's the main suspect.

The team investigates a drug deal gone bad after the body of a college student is found; Detective Hailey Upton temporarily joins the team and finds her investigative methods clash with the Bureau's more buttoned-up environment.

The team welcomes a new member, Special Agent Tiffany Wallace, as they search for killers who orchestrated a mass shooting at a media company; OA's personal connection with the case threatens to cloud his judgement.

The team races to stop an active serial killer after three women are found weighted down at the bottom of a lake; Jubal looks into an old closed case after there are multiple similarities to the recent victims.

When the leader of a drug cartel and one of the world's most wanted men is apprehended by the team, the entire FBI headquarters is put at risk when his henchmen unveil a plot to free him; Isobel must make a difficult decision.

A shooting at a quinceañera leaves two dead, but the team believes they may not have been the intended targets; Maggie is conflicted as the team decides the best plan of action for using a witness to take down their suspect.

Dr. Carter accompanies Abby on a road trip to retrieve her mother; Dr. Corday prepares for childbirth with Dr. Greene at her side.

Abby fears her suicidal mother may be released from the mental hospital after she appears coherent before the judge; Dr. Benton injures his hand.

Abby is encouraged when her unstable mother gives her enlightening advice in a rare moment of clarity; Dr. Weaver ignores Dr. Carter's interest in the chief resident position.

Gunshot victims flood the ER when a distraught father goes on a shooting spree in a foster-care facility.

Dr. Greene ministers to a young woman (Jessica Townsend) who was injured during a confrontational television talk show.

Dr. Carter deals with heavy-metal roadies following a concert accident; chief resident Chen panics when she is overwhelmed with patients.

A murder in a Florida community of sex offenders results in a large number of possible suspects; a career opportunity could take Lewis away from the BAU.

Rossi's daughter, a journalist, investigates the disappearance of a college student; JJ comes back from maternity leave.

An unknown subject in Phoenix abducts people and deprives them of sleep; Garcia and Hotch deal with a threat from hit men.

The BAU works with the NSA when two undercover DEA agents are murdered and another goes missing; Hotch hopes the team's work with the NSA will bring them closer to finding a ring of hit men.

The members of the BAU team track an unknown subject who appears to be fascinated with medical experimentation.

Reid plays a central role in the BAU's elaborate plan to take down a ring of hit men known as the Dirty Dozen.

When corpses are discovered in public places in Boston, a ride-sharing service may lead the team to the killer.

The BAU looks for a suspect and a motive when victims are found in truck stop restrooms in the South.

Pride, Sebastian and Tammy travel to South America after Pride is personally requested by a former colleague to assist with a classified operation that has been compromised.

Percy and Lasalle go under cover at a high-stakes poker game after the organizer targets players with access to a naval research laboratory; Laurel Pride visits her dad during spring break to discuss options after her upcoming graduation.

Pride and his bar patrons are held hostage by a group of volatile thieves.

Gregorio calls on her former behavioral science professor when the team's latest case matches one she studied during FBI training.

The team searches for a young girl who was kidnapped from a cabin during a family vacation; Maggie questions her relationship with Nestor when she learns he hasn't been completely honest with her.

The team must infiltrate a drug trafficking gang after the robbery of a chemical plant leaves two customs agents dead; Nestor offers his help on the case, giving Maggie new insight into his character.

The team hunts a killer who is fatally shooting seemingly unrelated targets; new agent Tiffany Wallace experiences tension between her work as an FBI agent and the responsibility she feels to her community as a Black woman.

After a bomb leaves three people dead, the team presses a reluctant informant to gather information from his close friends who are under suspicion; OA and his girlfriend clash over where the informant's rights lie.

When a reporter is kidnapped and held without a ransom demand, the team must dig into her past relationships in order to pin down her assailant's motive; Isobel's relationship comes under fire when the case makes a connection to her boyfriend.

The team must track down two assailants who wear animal masks while committing armed robberies; Tiffany and Scola butt heads on whether or not to accept the local NYPD's offer to help in the investigation.

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.

When a doctor is murdered, the detectives investigate an abortion protester; Van Buren receives more bad news; Connie faces a moral dilemma.

The revelation of a murder victim's true identity leads detectives to a suspicious web site with threatening posts.

When a wealthy young woman is found dead in her apartment, a few signs lead detectives to believe the killer was not after her wealth; a security video exposes two potential suspects, leading the detectives to a drug cartel.

A suspicious nasal spray is found at the site of a deadly car crash; after the medical examiner realizes the spray could easily disorient its user, the detectives become suspicious of the victim's boss.

When a key witness in a murder trial is found dead in her hotel, detectives get involved in a spiraling case that unravels into an intricate conspiracy.

Detectives Lupo and Bernard think a violent armed robbery might be a scare tactic for a shakedown.

When a campaign volunteer is murdered, Detectives Lupo and Bernard end up dealing with more than just dirty politics.

When a journalist is found dead in an abandoned apartment, the investigation uncovers a relationship between the victim and a daytime talk-show host, who admits to a series of workplace affairs and a blackmail threat.

When a family is found murdered at home, a runaway teenager becomes a suspect.

The investigation of a 16-year-old student whose body was burned causes Lupo and Bernard to question the young person he mentored, the last person to see him alive; the investigation draws attention to a vicious high-school rivalry.

A woman's body is found stashed on a food service cart in a hotel; Detectives Bernard and Lupo discover evidence that leads them to a medical school research project.

After a man is found guilty of a hate crime, Emily Ryan (Amy Madigan) and The Innocence Collective try to prove his innocence.

A journalist posts a scathing article documenting Pride's "reckless use of justice"; the team is concerned about the fallout from the piece and the confidential information revealed; Rita Devereaux tells Pride it is a coordinated attack on him.

Pride assembles an off-the-books team to search for a loophole when he faces a grand jury indictment for abuse of power.

Pride's teams uncover a sinister plot during the New Orleans Tricentennial Fleet Week celebration.

While Pride fights for his life in the ICU, the team scours the city for the hit woman who attempted to assassinate him.

Evidence from the stabbing of a Marine sergeant leads Torres to meet his father, who left when Torres was a child.

The team investigates a biker killed in a hit-and-run; Gibbs prepares to testify against a financial adviser who stole millions from his Navy clients.

NCIS tracks a stolen laptop to the uncle of a young boy, Phineas, Gibbs' former neighbor.

When members of an NCIS Regional Enforcement Action Capabilities Training Team are killed during an explosion, NCIS Special Agent Jessica Knight, the lone surviving member, helps crack the case using high-tech body armor.

While pursuing a dangerous arms dealer, the team is shocked when Bishop is implicated in an old NSA leak; Gibbs and Marcie realize the killer they've been tracking may be onto them.

As the NCIS team searches for Gibbs after wreckage from his boat is discovered; they find out he was tracking a serial killer with journalist Marcie Warren, who wrote an exposé on him.

Dr. Greene's rebellious teenage daughter suddenly appears at the hospital after running away from his ex-wife.

Susan Lewis looks to return to County General; a beautiful French waitress stops by and asks for Kovac; Chen gets a risk management review.

Dr. Lewis returns to County General and clashes with the staff; Greene treats a man whose frantic daughter crushed him with her car.

A taskmaster follows Corday to monitor measures taken to prevent deaths from infections; a fast and lethal virus attacks two college students.

Dr. Corday desperately searches for a possible "angel of death" who is secretly killing her elderly patients.

A terrible storm causes an influx of patients; Weaver races to save a pregnant woman who's inside a wrecked ambulance.

Benton and his attorney begin a battle in court for custody of his son; a distraught man must decide whether or not to allow surgeons to harvest organs from his terminally ill wife.

Benton's custody battle hits a critical stage; Carter receives unsettling news from his father; a young woman accidentally shoots her son near a Christmas tree.

Abby helps a distraught boy whose mother died of a stroke; a man with schizophrenia who once stabbed Carter and killed a doctor checks into the ER.

Snobbish and wealthy Joanna Stayton (Goldie Hawn) is living a life of leisure with her husband, Grant (Edward Herrmann), when she falls off their yacht and suffers amnesia. Grant takes the opportunity to rid himself of the demanding Joanna - but Dean (Kurt Russell), a widowed carpenter with four kids who once worked for Joanna, arrives and claims she's his wife. Joanna can't remember her past identity, but has trouble believing that she was ever meant to be a working-class mother of four.

Snobbish and wealthy Joanna Stayton (Goldie Hawn) is living a life of leisure with her husband, Grant (Edward Herrmann), when she falls off their yacht and suffers amnesia. Grant takes the opportunity to rid himself of the demanding Joanna - but Dean (Kurt Russell), a widowed carpenter with four kids who once worked for Joanna, arrives and claims she's his wife. Joanna can't remember her past identity, but has trouble believing that she was ever meant to be a working-class mother of four.

The team searches for a former Irish Republican Army bomb maker who was smuggled into the city; they are joined by agent Hannah Khoury, Pride's replacement during his medical leave; Pride considers a new position within the agency.

The team investigates the murder of a Navy intelligence officer killed during a conference for foreign diplomats; Pride has some trouble adjusting to his new position at the agency.

An investigation into the murder of a petty officer reveals a conspiracy in a tight-knit local fishing community; Lasalle awaits the final results of the tax fraud investigation into his family's company.

Pride's father, Cassius Pride, is wrapped up in an NCIS case involving a notorious unsolved casino heist; Pride meets a family member he never knew existed.

After Pride's assistant escapes from a kidnapper, the team uncovers evidence of a suspect who is harvesting organs from multiple victims; Pride turns to a friend for guidance as he struggles with the ramifications of his recent brush with death.

Following a deadly car explosion in the French Quarter, the team interrogates a professor and former member of a student protest organization; Tammy discovers a secret about Hannah's personal life.

The team places Mateo Diaz, a high school gang member turned informant, in protective custody while they investigate the murder of his junior reserve officers' training corps instructor; Pride needs his brother's help to gain Mateo's trust.

While trying to find the serial killer Gibbs was after, the NCIS team discovers another person has been tracking the case as well.

Gibbs and Parker go on a road trip to find one of the serial killer's victims; Agent Knight goes under cover at a large manufacturing company with ties to the murders.

Gibbs and McGee head to Alaska while the team works at home to uncover the conspiracy behind the serial killer.

The NCIS team investigates the death of a Navy commander whose body suddenly explodes before Jimmy can examine it.

NCIS investigates the death of a beloved Navy commander who trained some of the top athletes in the country.

NCIS investigates the death of a man on a cruise ship whose body is discovered in the ship's sauna by McGee's mother-in-law.

A Navy reservist's body is found in a beat-up car at the end of a gun range; Kasie weighs the pros and cons of buying a gun.

When a hotshot financial adviser is found shot at a naval station, NCIS investigates the case by interviewing the victim's 3D hologram of herself, which she created before her death.

NCIS is called in when Navy Chief Warrant Officer Rafi Nazar is suspected of trying to sell stolen classified Navy software used to pilot combat drones.

After a civilian research vessel in the North Atlantic picks up a small boat of wounded Navy officers, NCIS arrives on the ship and is forced to hide after discovering terrorists are onboard.

When the body of a Navy lieutenant is discovered missing an eye, the NCIS investigation leads to the world of cage fighting.

While investigating the death of an intruder at Quantico, Jimmy and Kasie are exposed to a deadly biotoxin; the NCIS team calls on Dr. Carol Wilson for help as they race to find the antidote; Torres tries to distract Jimmy's daughter.

An 18-year-old woman escapes from the home where she and two other women were held captive for years.

The BAU team combs Los Angeles for a suspect after security footage is discovered, which shows an unknown subject being invited into victims' homes.

When Morgan is abducted, the members of the BAU team race against time to find him and save his life.

The team searches for an unknown subject who takes children while their parents are asleep; Morgan tries to find out who attacked him.

When an unsub targets the BAU, the team pursues the person who is responsible for the actions.

Emily looks to the BAU for help when tracking an international serial killer; the BAU deals with Morgan's departure.

The BAU hunts for an UnSUB who deliberately disfigures victims; Rossi and his ex-wife have an uncomfortable reunion.

The BAU plays a dangerous cat and mouse game with a convicted serial killer who may have information on the whereabouts of two kidnapped boys.

The team investigates the murder of a Navy contractor who secretly lived two lives for decades.

Pride is given a series of tasks to complete by unknown assailants who are holding Wade and his father hostage.

Pride and the team hope to take down a secret and lethal group of former intelligence agents and avenge the death of someone close to them.

While under cover, Gregorio joins a social club for military wives after one of the members is contacted by an ex-boyfriend who is on the FBI's most wanted list.

NCIS investigates the disappearance of a Navy entomologist after a deadly shooting at a research lab; the team finds that a rare and deadly virus was stolen.

Pride and the team reunite with conspiracy journalist Oliver Crane after the source for his latest story is murdered; Hannah's former partner, Liam Somers, surprises her and shares a shocking revelation about an old case.

The team investigates multiple murders tied to a construction company that creates an experimental chemical that strengthens sea walls; evidence from Hannah's previous mission in Oman is used against her.

Detectives Lupo and Bernard tackle a complex case when four police officers are shot.

When Dr. Oscar Silva, an environmental scientist, is poisoned during a conference, Lupo and Bernard suspect competitors from Silva's field of study.

When the body of a model is found burning in an alley, Detectives Lupo and Bernard search for her killer.

When a young heiress dies of an apparent drug overdose, Lupo and Bernard begin to suspect her cousin, whose inheritance increased after her death.

A man's double life comes to light after he is stabbed to death.

When a reality TV crew finds a dead man's body locked in a dog cage, detectives suspect the victim's wife.

Detectives search for an anonymous blogger who has posted plans to blow up a school; Lt. Van Buren struggles to keep her personal issues private.

A troubled young man (guest star Wil Horneff) motivated by his religious beliefs becomes the prime suspect in a double homicide.

The murder of a high-school English teacher reveals a love triangle involving a 16-year-old and her faculty lover.

A rock singer's body is found in a garbage can with large amounts of heroin and cocaine in her system.

Detectives hope vacation video shot by a couple will help lead them to the murderer of an actress found shot to death in her apartment, but matters get complicated when the tourists decide to make a quick buck by selling the tape to a TV station.

A diamond ring identifies the skeletal remains of a murder victim who was believed killed in the World Trade Center collapse.

Detectives suspect a young bride and her reputed lover (guest stars Gretchen Egolf and Bobby Cannavale) hired a hit on her husband.

The acquittal of an alleged cop-killer leads to the murder of a defense attorney and a suspect who may belong to a white supremacy group.

Detectives accuse a professional ballplayer of killing the limousine driver who supplied him with steroids.

The smoldering corpse of an Asian girl is found outside the Chinese consul general's apartment, and detectives suspect she immolated herself as a political statement.

Detectives suspect foul play when a teenager dies after being struck by a vehicle in front of a coffee shop.

When half of a two-man gambling operation is found murdered, the detectives finger his partner as the prime suspect.

After a man is killed by an explosive package shipped to his home, the team attempts to capture the sender and intercept his latest deadly parcel; Maggie struggles to trust her younger sister.

The team rushes to track down two doctors abducted by a desperate father willing to do anything to save his son; Jubal's uncertainty in his family life affects his judgement during the hostage situation.

When the CEO of a major brokerage firm is killed while surrounded by protesters, the team looks into who had the most to lose from his company's perceived manipulations; Scola's previous Wall Street career and the reasons he left come to light.

While investigating a mass casualty incident at a New York City restaurant, the team scrambles to determine if it was racially motivated and if there was more than one gunman; Maggie starts to notice troubling behavior from her co-worker Elise.

When five prominent men are gunned down at a trendy New York restaurant, the team's investigation brings them into contact with a lieutenant in Antonio Vargas' cartel, triggering a showdown between Isobel and Vargas.

After a young woman is killed on her way home from a lavish yacht party, the team investigates who she was and how she came to be at the event.

An injured and condemned murderer (Cyril O'Reilly) wants to die in the ER rather than await execution; Abby advises a neighbor (Christina Hendricks) to seek shelter from her abusive husband (Matthew Settle).

An accidental overdose brings Drs. Greene and Corday's baby into the emergency room, gripping the parents with fear.

Greene confronts Corday when she orders Rachel out of their home; Abby tries to protect a battered neighbor who refuses to press charges against her husband.

Greene fights loneliness and pain by throwing himself into his work; Chen discovers that a comatose teenager is pregnant and ready to give birth.

After a dominatrix makes an appearance in the ER, Dr. Weaver orders the staff to attend a sexual-harassment seminar, where truths surface about their relationships.

Corday and Greene awkwardly cross paths in the ER; Weaver treats victims of an inferno which may cost the life of a dear friend.

Hotch is arrested by a SWAT team and suspected of conspiracy; when the team members scramble to prove Hotch's innocence, they discover a larger plot may be on the horizon.

New recruit Luke Alvez helps the team capture a killer who escaped from prison with 12 other convicts.

J.J. is shaken after investigating the case of two abducted children, and tells her husband about the events.

As the BAU welcomes back Emily Prentiss, they're called upon to investigate the disappearance of three women.

The team searches for a serial killer along the Appalachian Trail in rural Virginia.

The BAU investigates the case of two murdered families, where two high school students are the sole survivors.

Three children vanish while riding their bikes on the same path where a similar unsolved disappearance took place 30 years earlier.

A man who believes himself to be the brother of Dr. Tara Lewis arrives in town, knowing everything about Tara's family; Tara is unable to make contact with her real brother.

After an elusive terrorist with a personal vendetta against Hannah resurfaces, she and her family are placed in protective custody while the team searches for the suspect.

After a reshuffling of assignments, Pride returns to the New Orleans office during the investigation of a missing petty officer.

The NCIS team investigates the murder of Patton's friend, a former Navy SEAL gunned down in a drive-by shooting while Patton watched.

A Navy lieutenant from a well-connected and affluent family has a fatal fall down a flight of stairs at a charity gala; the team investigates whether his death was an accident or foul play.

Maggie, OA and the team must stop a hacker who is disabling life-saving equipment in several New York City hospitals; Jubal's son waits for important surgery at one of the impacted hospitals.

The team finds a connection between bombings and a private veterans' club in New York City; Isobel tells a reluctant OA to recruit a former Army buddy for intel.

The team hunts for a serial killer who is targeting young, homeless men; Tiffany and Scola don't see eye to eye on how to handle the case.

After a suburban woman is kidnapped from her home, the team looks into trysts on both sides of a seemingly perfect marriage; OA feels pressure from Mona to make changes in his career path.

The team must track down a shooter targeting detectives from the same precinct and unit while facing mounting tension from the NYPD; Tiffany finds that her NYPD roots may be influencing her view of the situation.

Programming to be announced.

After a young girl is kidnapped from her daycare, the team must help her parents navigate a debt owed to the deadly gang in their neighborhood; Maggie struggles to focus on the case when her sister returns from rehab.

A widow is shocked that her new "boyfriend" is the manipulative leader of a terrorist group planning an attack; Scola is reminded of his brother's death on 9/11; Tiffany worries about his emotional choices during the investigation.

When Greene's aggressive illness begins affecting his coordination, he wonders if his fate will mirror those of his terminally ill patients.

When Dr. Lewis gets a distressing phone call from her niece, she races to New York to search for the child and her troubled sister.

Dr. Carter reads a letter from ailing Dr. Greene to the emergency-room staff; Dr. Weaver lashes out at a mentally challenged patient; a terminally ill, homeless man continues asking for Greene's help.

Dr. Greene takes his daughter Rachel to Hawaii in the hopes of patching up their troubled relationship.

Carter and Abby treat two children whose symptoms suggest a deadly disease and force the hospital to lock down in quarantine until federal experts can arrive.

Dr. Carter, Abby and other staff members are quarantined as the Centers for Disease Control and Prevention probe a mysterious and deadly outbreak.

The BAU team investigates when the remains of a dozen people are discovered along a creek bed in Yakima, Wash.

While conducting a profiling course on his birthday, Rossi gets a call from serial killer Tommy Yates, who gives him the location of his latest victim.

The team investigates when home invasions involving casualties strike upscale neighborhoods in San Diego.

The BAU investigates when a bizarre hieroglyph is found under a deceased homeless man's armpit; Reid decides to take his mother out of a clinical study early to bring her home.

The BAU team is called in to investigate when male bodies are discovered that seem to be impossible to identify.

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.

When Elvis Bertrand's "daughter" is linked to a murder case, he asks Pride to prove her innocence.

Tammy is convinced that a con man committed the hit-and-run murder of a Navy doctor, even though the evidence shows otherwise; unbeknownst to Hannah, her husband approaches Pride with new intel on an underground spy network.

Pride and Lasalle travel to war-torn South Ossetia to locate an FBI agent who was kidnapped during a failed mission to apprehend the leader of Apollyon, the underground spy network responsible for murdering Pride's father.

After tracking Apollyon, a deadly underground spy network, to war-torn South Ossetia, Pride is separated from the team and faces grave danger; in order to save Pride, the NCIS team must locate a mole who continues to feed information to Apollyon.

After Rina is critically wounded while heading to work with Jubal; the team makes the chilling discovery that a vengeful Vargas orchestrated the shooting from behind bars and continues to target the rest of their team and their loved ones.

As the team investigates a string of jewelry store robberies that culminate in a double murder, they uncover a connection to a 16-year-old boy trying to survive the foster care system.

The team searches for an abducted college coed; Jubal has a tense encounter with Rina's mother.

Maggie goes under cover working in a bar to investigate an anti-government group that regularly gathers there; a single father on the periphery of the group begins to fear he's in danger of becoming collateral damage.

When a Muslim college student and his younger brother are murdered, the team connects with the outraged imam of OA's former mosque, who insists the victims were wrongly targeted as terrorists.

The team investigates an extremist gun group after an anti-gun lobbyist building is bombed; SAC Bashar dangles a possible promotion for OA.

The team realize they have a cross-country serial killer on their hands; the case has ties to Isobel's father, Robert, and his hotel, leading to revelations about their fractured relationship.

The shutdown of another hospital floods the ER with patients; Dr. Pratt resuscitates a heart-attack victim who had been pronounced dead.

A patient pulls a gun on Dr. Chen and other staff members, prompting Dr. Carter to lead a walkout when his request for metal detectors is delayed; Dr. Kovac treats an HIV-infected boy whose parents spark his curiosity.

Gallant resents the unfeeling treatment afforded an elderly patient; Carter discovers Abby drank alcohol while out with friends; Kovac flirts with a young patient's mother.

Dr. Corday operates on a man who has a flesh-eating infection; Pratt takes offense at some of the Halloween costumes he sees in the ER; a new surgical intern (Don Cheadle) has a daunting physical handicap.

Dr. Corday clashes with the new surgical resident (Don Cheadle) over a patient's treatment; Abby wonders about her brother's (Thomas Everett Scott) erratic behavior.

Drs. Carter and Chen treat a frightened nanny who may have been impregnated by her employer; doctors frown on a new resident's (Don Cheadle) bedside manner.

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.

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 NCIS team investigates a deadly bombing at a military museum event with over 1,000 people in attendance.

Pride must cut his vacation short when Hannah is suspended for breaking protocol during a joint investigation with the FBI.

A Navy pilot says she saw an unidentified object prior to a private plane crash; Pride suffers from insomnia and nightmares as a result of being kidnapped and drugged last year.

Pride travels to New York City after new DNA evidence is linked to a 20-year-old cold case from his past.

After an immigration agent is fatally shot at a hockey game, the team attempts to find the shooter, who they believe may also be targeting Congressman Curtis Grange, who was at the same game.

When a young couple is found murdered in a New York City park after returning from a vacation, the team searches for a suspect linked to the drug trade; Scola turns over a new leaf when it comes to his relationships.

OA is forced to confront one of his biggest fears when the team discovers that deadly sarin gas may have been sold to terrorists.

When a morning show host is murdered inside her home, the team tracks the killer; things become awkward for Scola when agent Nina Chase becomes part of the team during Maggie's recovery.

A killer is using drug mules to exploit airport security checkpoints; OA struggles to cope with the aftermath of the sarin gas exposure and the 10th anniversary of his army friend's death in Afghanistan.

When a retired Drug Enforcement Administration agent is shot outside a bakery, the team works to determine if the victim's past cases or current bouncer job are connected to the murder; Nina and Tiffany clash over the use of an informant.

A vigilante priest kills a notorious drug dealer in the name of God; Briscoe is reminded of his daughter's death at the hands of a trafficker.

Two seemingly unrelated murders, stolen jewels and a case of mistaken identity lead to a defendant being tried for a crime without being present at the trial. Mandy Patinkin and Andrew McCarthy guest star.

When a car salesman is found bludgeoned to death, Detectives Briscoe and Green search for his last customer.

A cosmetics tycoon (Lucie Arnaz) is involved in controversial stock transactions, scandalous affairs and hormone-replacement therapy.

A media-savvy attorney (Gregory Hines) defends a black teenager accused of shooting an off-duty police officer.

Detectives investigating a cabdriver's death discover his last fare was a gifted writer with a violent streak.

After a woman's body turns up in the East River, the detectives discover she recently had attended a professional football player's birthday party.

The lead suspect in the murder of a Manhattan executive claims his knowledge of the crime came from a psychic vision.

Investigators identify multiple suspects in the murder of the admissions director at an ultra-elite private school, including its headmaster (guest star Roger Rees).

The corpse of a Russian model shows many old injuries, convincing the detectives that she had been the victim of abuse.

A sniper shoots four people at random in Manhattan and causes a citywide panic; Jack and Serena uncover a shocking truth behind the shootings.

A comic's infant son dies after being dropped from a high-rise window, leading detectives to a dark secret.

The detectives follow a string of mysterious homicides; a woman runs over her unfaithful husband; a murdered woman has an uncertain relationship to her brothers.

The detectives stumble upon a serial killer while investigating the rape and murder of a teenage girl.