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.

First-class agents bring all of their talents, intellect and technical expertise to tenaciously investigate cases of tremendous magnitude, including terrorism, organized crime and counterintelligence, to keep New York -- and the country -- safe.

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.

First-class agents bring all of their talents, intellect and technical expertise to tenaciously investigate cases of tremendous magnitude, including terrorism, organized crime and counterintelligence, to keep New York -- and the country -- safe.

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.

First-class agents bring all of their talents, intellect and technical expertise to tenaciously investigate cases of tremendous magnitude, including terrorism, organized crime and counterintelligence, to keep New York -- and the country -- safe.

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.

First-class agents bring all of their talents, intellect and technical expertise to tenaciously investigate cases of tremendous magnitude, including terrorism, organized crime and counterintelligence, to keep New York -- and the country -- safe.

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.

First-class agents bring all of their talents, intellect and technical expertise to tenaciously investigate cases of tremendous magnitude, including terrorism, organized crime and counterintelligence, to keep New York -- and the country -- safe.

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.

First-class agents bring all of their talents, intellect and technical expertise to tenaciously investigate cases of tremendous magnitude, including terrorism, organized crime and counterintelligence, to keep New York -- and the country -- safe.

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.

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.

The hostile pediatrics chief targets Ross; gang shootout adds chaos in the ER; new student Tracy confides in Carter; staff debates new clerk's past.

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.

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 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.

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.

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.

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.

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.

Greene's wife is in an accident; Doug dines with his mother (Piper Laurie); Carter lands Benton an interview; a patient enlightens Hathaway about her house.

Greene may face a malpractice suit; Hathaway treats a patient who resembles Santa; Boulet counsels gang members; Carter buys a gift for Tracy.

The doctors treat dozens of severely neglected sick children found in a rat-infested apartment; Greene's wife serves him with a summons.

Ross accuses an alcoholic father of neglect; Greene's daughter expresses her anger over the divorce; Dr. Morgenstern is admitted as a patient.

Dr. Greene's loss of a patient for no apparent reason prompts self-doubts; Lewis resents Weaver's mentoring; a sexually confused teen seeks help from Ross.

Ross' birthday includes a surprise visit from his prodigal father (James Farentino); rumors about Greene and Lewis abound; Benton questions Vucelich.

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.

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.

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.

A retired SEAL -- who tracked people impersonating military personnel -- is murdered; Brody finds that LaSalle is uncharacteristically unenthusiastic about Christmas.

The investigation into an explosion at the Navy-Marine Corp Relief Gala reveals Pride was the bomb's target.

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.

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.

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.

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.

A Beverly Hills teen (Alicia Silverstone) plays matchmaker for teachers, transforms a bad dresser (Brittany Murphy) and examines her own existence.

A wrestler (Emilio Estevez), a rebel (Judd Nelson), a brain, a beauty (Molly Ringwald) and a shy girl share Saturday detention in a Chicago high school.

When the star quarterback is injured, a rigid high-school football coach expects an irreverent player to lead the team to victory.

A flood forces the maternity ward into the ER; Lewis receives a visit from the social worker handling her niece's adoption; Jerry meets Scottie Pippen.

Burn victims flood the ER; Lewis learns her fate regarding plans to adopt her niece; Ross considers meeting his estranged father (James Farentino).

Victims of a multi-car accident fill the ER; Carter learns the location of his surgical residency; Lewis and Chloe fight over the baby.

Greene copes with an understaffed ER on a night shift; a teen overdoses on a toxic chemical; a drive-by shooting injures a baby.

Lewis and Chloe battle in court; Benton clashes with Jeanie over a misdiagnosis; Greene strikes up a relationship with the videographer (Joanna Gleason).

Lewis delves into work after losing the baby; Carter spends time in pediatrics with Ross; the hospital responds to Benton's charges against Vucelich.

Cancer patient Loretta (Mary Mara) needs emergency surgery; a 10-year-old girl needs a liver transplant; Jeanie's husband checks into the ER.

A slain Manhattan yuppie (Patrick Swayze) reaches out to his lover (Demi Moore), with a medium (Whoopi Goldberg) as his middlewoman.

When the star quarterback is injured, a rigid high-school football coach expects an irreverent player to lead the team to victory.

A wrestler (Emilio Estevez), a rebel (Judd Nelson), a brain, a beauty (Molly Ringwald) and a shy girl share Saturday detention in a Chicago high school.

A Beverly Hills teen (Alicia Silverstone) plays matchmaker for teachers, transforms a bad dresser (Brittany Murphy) and examines her own existence.

The NCIS team and the Coast Guard Investigative Service work together when a Navy Admiral's daughter is the prime suspect in a double murder on a research boat; Lasalle looks for his estranged brother.

After learning he was poisoned with a deadly dose of radiation, a Navy lieutenant commander asks Pride and the team to solve his imminent murder.

An agent is killed while working on a security detail for the Vice Chief of Naval Operations; Brody's past is evaluated.

A petty officer is murdered during Mardi Gras festivities; Pride contemplates what to tell his daughter about his strained relationship with his father.

The NCIS team tries to narrow down the motive when a Navy recruiter is murdered in a hit-and-run; Lasalle worries about his brother.

Pride believes Baitfish has returned and has the NCIS team chase down leads in an attempt to locate him.

When a sailor is killed in a strip club, the murder weapon turns out to be linked to other unsolved cases; Brody receives a visit from her ex-fiance.

The team must help an injured former Secret Service agent regain his memory in order to stop the launching of weapons of mass destruction.

The team members go under cover on a cruise ship in order to locate and disable stolen rockets; as Valentine's Day approaches, Ralph develops a crush.

The members of the team travel to Mexico when the daughter of a tech billionaire is abducted; Walter participates in an interview that leads to hurt feelings.

The team must facilitate peace discussions when a conflict in Eastern Europe threatens to escalate into World War III.

As the members of team Scorpion try to save lost hikers, their helicopter crashes, igniting a large wildfire and injuring the pilot.

The team protects a witness who is on her way to testify against a dangerous drug cartel -- while the cartel is in hot pursuit.

When Walter finally learns Cabe's secret about the Baghdad mission, the future of the team is threatened; Ralph puts his life in jeopardy to help the team.

When Walter's car ends up at the edge of a cliff, the fractured team must come together for their most important mission yet.

When a nuclear powered Russian satellite is knocked out of orbit, the new Director of Homeland Security reunites the team; Paige and Walter confront their feelings.

When a woman from Cabe's past asks for help apprehending a war criminal, the members of Team Scorpion travel to Cuba.

Sylvester goes under cover in a federal prison in hope of saving three judges' lives; the team must orchestrate a prison break when Sylvester's life is threatened.

An explosion sends a top-secret submarine to the bottom of the ocean with limited oxygen, a self-destruct function that's about to activate, and Walter, Cabe and Happy on board.

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.

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.

During the autopsy of a petty officer who seems to have died of natural causes, an armed man holds Wade, Sebastian and Danny hostage in the morgue.

When a Navy commander's car is stolen with his baby inside, the team must determine if it was a targeted abduction.

Lasalle's brother, Cade, needs the team's help when he becomes a murder suspect -- and cannot remember what happened; Lasalle is determined to prove Cade's innocence, despite the wealth of evidence against him.

Baitfish murders a person close to the team in order to send a message to Pride; a citywide hunt for the elusive criminal takes place.

Pride has suspicions about a mole; new intelligence comes to light that indicates a breach at the ports.

Pride and the team must go on a dangerous undercover mission to retrieve a stolen missile and prevent an attack.

A blogger dedicated to exposing government corruption is murdered; during the investigation, it is revealed that a war crime may have occurred during a humanitarian effort in Bolivia.

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.

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.

After running away fails, a terrified woman (Jennifer Lopez) empowers herself in order to battle her abusive husband (Billy Campbell).

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.

After running away fails, a terrified woman (Jennifer Lopez) empowers herself in order to battle her abusive husband (Billy Campbell).

While in jail for murdering her husband (Bruce Greenwood), a woman (Ashley Judd) discovers he is living under a new identity with their son.

While in jail for murdering her husband (Bruce Greenwood), a woman (Ashley Judd) discovers he is living under a new identity with their son.

Covert CIA agent Martian is called back to London Station; an incident in Belarus puts Bosko and Henry on a collision course with Langley; Danny learns a lesson and someone unexpectedly reappears in Martian's life.

Dr. Blake arrives from Langley and is put to a test by Martian and Henry; a spooked source threatens to put an operation at risk; Danny's cover is put in play; Martian, overtaken by events, begins to question Sami's motives.

After running away fails, a terrified woman (Jennifer Lopez) empowers herself in order to battle her abusive husband (Billy Campbell).

While in jail for murdering her husband (Bruce Greenwood), a woman (Ashley Judd) discovers he is living under a new identity with their son.

While in jail for murdering her husband (Bruce Greenwood), a woman (Ashley Judd) discovers he is living under a new identity with their son.

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.

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.

Carter makes an error in judgment; the chief of staff's changes worry Greene; a new intern works with Ross; a new pediatric surgeon (Glenne Headley) arrives.

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.

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.

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.

When a highly regarded Navy pilot is killed after crashing a new, high-tech jet at an air show, the team must determine if it was human or mechanical error.

The NCIS team investigates when a Navy drone pilot is murdered after using a black market drone to obtain military surveillance.

When an Australian Royal Navy Lieutenant is murdered in New Orleans, Special Agent Naomi Parsons (Kate Beahan) is sent to work with Special Agent Pride.

When a petty officer is found dead, the team's participation in the annual Red Dress Run comes to a halt.

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.

When an officer is shot dead at a pawn shop along with the store's owner, the team tries to figure out why a young, recent Ivy League dropout is tied to the crime.

When a wealthy accountant is gunned down for secretly testifying against a notorious drug lord, the team's investigation leads Tiffany to ask for help from a friend who was formerly with the NYPD and is related to the dangerous crime boss.

The team investigates a series of brutal assaults; OA hides information about his own mugging.

As the team works to rescue a 5-year-old kidnapping victim, Scola suspects the boy's mother isn't being forthcoming about why her son was targeted; Nina struggles to open up to Scola about matters in their relationship.

Maggie returns from medical leave and helps the team investigate two homicides: a law student and a young man with possible gang ties; an inadvertent revelation from Maggie causes OA to worry that she is rushing back into the job too quickly.

A helicopter delivers an injured family to the ER; Benton's overconfidence in surgery threatens a child's life.

Benton obsesses over a critically ill baby and uses extreme measures to sustain Ross' brain-dead patient.

Lewis and Greene face a personal decision; a drunken woman goes into labor; Charlie (Kirsten Dunst) visits the Healthmobile again.

Greene questions Jeanie about her health after he treats Al; Carter hears about Keaton's future plans; Ross supports Hathaway in her pre-med studies.

Jeanie decides to stop rumors about a staff member with HIV; Charlie (Kirsten Dunst) brings a seriously ill baby to Ross; Doyle helps a battered woman.

Jeanie enrolls in a study involving night-shift workers; Hathaway upsets the nurses; Charlie reappears and asks Ross for a favor.

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.

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.

An extremely intelligent Navy coder -- employed by Brody's mom (Annie Potts) -- is put in danger when the heart intended for him is stolen.

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

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

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

When a deadly truck heist arms the killers with enough ammonium nitrate to construct a massive bomb, the team discovers a link to a terrorist group Maggie is working to infiltrate.

A teen shows up at FBI headquarters with a large bag of fentanyl, seeking the team's protection from the men who shot his father; Nina goes to Scola with a proposal he is hesitant to accept.

The team jumps into action when analyst Kelly Moran is taken hostage.

The abduction of a young woman leads the team back to a cold case from 18 years ago, which pushes Isobel to reconnect with her old partner Jake and take another shot at solving one of her first cases at the bureau.

After a mysterious bioweapon leaves two MTA workers dead and one injured, the team rushes to determine who is behind the attack and the location of their next target; Jubal's past demons begin to surface.

The shooting of a federal corrections officer leads the team to an ex-Marine who has gone rogue ever since he returned from Afghanistan; Tiffany's sister looks to her for guidance when their younger brother begins to lash out.

The team investigates the murder of a professional informant after he's found dead outside an abandoned factory; Maggie reconnects with an old colleague and mentor.

Carter and Benton share a personal tragedy; bullets injure members of a bridal party; Charlie's mother appears; Jeanie and a doctor hit it off.

Greene's success with prospective ER interns causes Anspaugh to offer him a tenured teaching position; angry with Benton, Carter wants a transfer.

Dr. Benton undergoes an emergency operation; Dr. Ross helps the mother of a teen with cystic fibrosis deal with her son's attempt to control his treatment.

Hathaway uses her medical skills to help the injured at a convenience-store robbery; guest Ewan McGregor.

Benton returns to work; Carter catches a critical error; a Down syndrome patient needs a heart transplant; Hathaway decides to take the medical admissions test.

Teens' gunshot wounds cause Greene to deal with racial attitudes; Carter evaluates a seemingly crack-addicted patient.

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 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.

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

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

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

A Mardi Gras celebration at Pride's bar is cut short when he and Mayor Douglas Hamilton (Steven Weber) are abducted by unknown assailants.

After a string of armed robberies targets various businesses, the team investigates a suspect who leads them to something much bigger; OA worries about his future when his investments begin to go south.

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.

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.

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.

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.