Gates and Kovac find themselves in a moral dilemma when a woman comes in with acute liver failure; Manish decides to give up a kidney for a stranger; Ray fights to find out the truth about a cheerleader's fall.

Family members have frostbite after being stuck in the snow; Neela is jealous when Dr. Dubenko brings in a new surgical intern; Gates deals with the reappearance of his father (Stacy Keach).

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.

A professor from Lewis' past tips off the BAU to an alarming number of overdose deaths of patients who just completed rehab.

Prentiss faces her past when the BAU is sent to investigate the murders of prominent businessmen, all of whom are missing their hearts; Prentiss plans a romantic first date with Mendoza, but the evening is cut short by an urgent call from Rossi.

The BAU team heads to Portland, Ore., to investigate a chilling abduction that may be linked to a local couple who were killed in their home a week earlier.

The BAU team flies to Iowa to investigate the disappearance of three 10-year-old children who appear to have been abducted from their homes, with surveillance video from a park as their only lead to finding the children's whereabouts.

Rossi questions his actions in the aftermath of a struggle with a serial killer who appears to have outsmarted the BAU.

The BAU investigates a string of murders taking place in supposedly haunted houses in Lewiston, Maine.

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 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 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.

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.

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.

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.

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 Web site 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 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.

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.

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.

A photographer (Annabella Sciorra) comes into the ER with a terminally ill patient; a new surgical intern, who appears to be Dr. Dubenko's new favorite, upstages Neela.

Kovac and Gates must deal with the frightened father (Robert Prosky) of a young man with heart failure; a man (Ken Davitian) risks his own life to be a good Samaritan; Pratt tries to make up with his brother.

Kovac feels the pressure of a busy emergency room; Sam befriends a terminally ill photojournalist (Annabella Sciorra); tension between Gates and his father (Stacy Keach) reaches the boiling point.

A home-theater installer leads a team of old-school arcade champs and a military specialist in a battle against aliens who base their attacks on 1980s era video games.

Dissatisfied with retirement, a 70-year-old widower becomes an intern at an online fashion site and develops a special bond with his young boss.

A home-theater installer leads a team of old-school arcade champs and a military specialist in a battle against aliens who base their attacks on 1980s era video games.

Dissatisfied with retirement, a 70-year-old widower becomes an intern at an online fashion site and develops a special bond with his young boss.

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

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.

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.

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.

Rossi prepares to marry Krystall; the team investigates a series of fatal shootings following car accidents.

The BAU team investigates an unsub with striking similarities to Rossi's latest obsession, "The Chameleon.".

The team searches for Everett Lynch and his daughter; Spencer has a meaningful visit with his mother.

The BAU team investigates a series of seemingly random fatal explosions throughout Kentucky and Tennessee.

The members of the BAU enjoy a Saturday off in vastly different ways; Rossi and Prentiss help Simmons assemble a new crib; Garcia leads a hacking competition; Dr. Reid strikes up a conversation with a woman named Maxine.

Following a series of fatal shootings, the BAU team travels to Illinois to investigate what appears to be a copycat serial killer.

After a father and daughter get kidnapped, a former foe of the BAU returns with very specific demands for Dr. Reid.

When the BAU team travels to Denver to investigate several murders, Prentiss is forced to evaluate her relationship with Special Agent Andrew Mendoza.

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.

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.

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.

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.

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.

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.

Doctors deal with personal and professional crises as they labor to save lives in the emergency room at County General Hospital in Chicago.

Doctors deal with personal and professional crises as they labor to save lives in the emergency room at County General Hospital in Chicago.

Doctors deal with personal and professional crises as they labor to save lives in the emergency room at County General Hospital in Chicago.

Doctors deal with personal and professional crises as they labor to save lives in the emergency room at County General Hospital in Chicago.

Doctors deal with personal and professional crises as they labor to save lives in the emergency room at County General Hospital in Chicago.

Doctors deal with personal and professional crises as they labor to save lives in the emergency room at County General Hospital in Chicago.

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.

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.

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 robbery in New York leaves a deadly trail of blood in its wake, and the killers loot an arsenal of fully automatic weapons in the process.

The team pivots when their sting operation to secure a massive bomb from an illegal broker leads them to discover that the device is already in the wrong hands; Jubal's promise to be present at his son's birthday party is put to the test.