Agent Brody sees a connection between the case of a sailor struck by a party bus and the death of her sister; the team gets ready for the city's St. Patrick's Day celebrations.

The team members set aside their personal and romantic issues when hackers take over targeted U.S. military aircraft and war ships, pointing the weaponry at American cities.

The team members set aside their personal and romantic issues when hackers take over targeted U.S. military aircraft and war ships, pointing the weaponry at American cities.

When Walter is accidentally launched into space in a rocket, Team Scorpion must find a way to bring him home before his oxygen runs out.

A boy from Ralph's class goes missing after having a run-in with a deadly criminal; Toby comes closer to discovering the identity of Happy's husband.

A simple job at the Los Angeles Natural History Museum turns deadly when thieves steal things from a rare gem exhibit to get the materials they need to make a nuclear bomb.

Team Scorpion explores a deep cave system in an effort to prevent a bat population from harming the North American ecosystem; the team dons Halloween costumes for Walter's impending immigration inspection.

While in Ireland for Megan's one-year memorial, Walter discovers a natural disaster at a nearby lake has created a poisonous cloud that threatens an entire village; Cabe and Toby try to ease the tension between Tim and Walter.

When Paige's estranged mother stumbles upon a forgotten nuclear reactor precariously close to exploding, she calls on the team for help.

Walter takes a perilous swim to rescue a woman trapped in the La Brea tar pits; Paige's mother maximizes Ralph's troop cookie sales.

Team Scorpion encounters gunrunners while spending Christmas Eve at an electronics-free mountain getaway; Tim makes a decision about his place on the team.

Team Scorpion is forced to freeze Cabe's body after he's seriously wounded by exploding shrapnel while on a mission in the desert.

When Team Scorpion is tricked into producing counterfeit cash for a foreign entity that intends to ruin the U.S. economy, Paige relies on her mother's skills as a grifter to save them.

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 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.

After Pride's daughter is attacked on campus, the team finds a surveillance van loaded with pictures of the special agent's every move.

The team investigates when a Navy lieutenant is murdered during a traditional funeral procession in the French Quarter honoring the recently deceased.

When a Navy lieutenant dies during a secret visit to a general's hotel, agent Pride and the team are asked to break protocol for the investigation.

While visiting her family's restaurant in the French Quarter, a Navy culinary specialist is the target of an explosion; in D.C., Brody tracks a lead in the Gen. Leak case.

NCIS teams with Homeland Security when the murder of a Navy master diver is discovered to be linked to the chatter concerning a foreign attack on the city.

The NCIS team discovers a mole in the ranks while helping the Department of Homeland Security locate 900 pounds of missing explosives that are a threat to New Orleans.

The team joins forces with several federal agencies to stop a sniper who has been targeting crowded events in the city; FBI Special Agent Tammy Gregario begins investigating Pride's team.

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.

A bounty hunter turns up dead while trailing a fugitive rapist and bookstore heir.

A carjacking involving SARS forces detectives to search for the initial patient infected to prevent an outbreak.

Detectives link the murder of an actress to a member of her therapy group, then focus their attention on a Tony-winning songwriter.

Detectives investigate a fire that ripped through a 300-plus audience at a rock concert, killing 23 fans.

An unemployed executive deposits $400,000 in his savings account before being gunned down in his upscale brownstone.

The detectives attempt to identify a body that was found floating in the Hudson River; after the victim is identified, her husband becomes the prime suspect.

A war correspondent who reputedly endangered U.S. troops in Iraq gets shot in the back with a military-issue handgun.

Detectives investigate the poisoning death of a grief counselor who claimed to communicate with the dead in order to comfort clients.

When the owner of a clothing company is beaten to death in his office, Briscoe and Green believe the prime suspect entered the factory just before the murder.

Prosecutors go after a driver who struck a homeless man, went home with the victim trapped in her windshield and let him die in her garage.

Detectives investigate the murder of a mob informant who sent a kingpin to jail.

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

A literary baseball groupie (Susan Sarandon) romances a pitcher (Tim Robbins) and a catcher (Kevin Costner) on a minor-league North Carolina team.

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

A literary baseball groupie (Susan Sarandon) romances a pitcher (Tim Robbins) and a catcher (Kevin Costner) on a minor-league North Carolina team.

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.

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

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

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

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

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

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

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

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

Pride faces more repercussions from the FBI after he helps a former Navy Intelligence Analyst who is the primary suspect in a multiple homicide case.

After the discovery of a petty officer's body inside a sports arena, evidence leads Pride and the NCIS team to a kidnapping case of another petty officer, last seen in Mexico.

The NCIS must come to the rescue of one of its own when Sebastian is kidnapped while dining in a restaurant with his mother; Sebastian relies on his gaming skills in a prison break.

The NCIS and the FBI investigate a private plane crash in the bayou that killed three sailors; Sonja and Lasalle interview candidates for a job opening on the team.

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.

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 high number of people need care in Darfur; Pratt and Kakarai embark on a dangerous nighttime journey to a hospital in El Fashir.

Pratt struggles to get a straight story when two abused boys come into the ER with their father; two U.S. Army officers enter the ER.

Injured inmates arrive at County General hoping to escape their prison time; Dr. Kovac puts himself in harm's way; gunmen invade the hospital.

While the ER recovers from the shootout, Steve, Mary and Rafe proceed to Canada with Sam and Alex; Weaver finds Abby in poor condition.

Abby's overbearing mother arrives at the hospital to comfort her and Dr. Kovac as their son's life lies in peril; Sam fears she will be arrested; Tony Gates makes a risky decision with an overdosed teen; Neela gets drunk.

Pratt assumes his new role as attending but must deal with the new interns; Gates' patient is an older man with congestive heart failure, whose partner (John Mahoney) fights with the man's family to keep him alive.

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

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

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

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

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

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

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

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

A Navy SEAL candidate is murdered weeks before his graduation; Wade seeks Pride's help when her adopted son announces his plan to join the Navy.

A sailor is murdered during a rowdy motorcycle rally in the city; Lasalle seeks personal advice from Gregorio.

After a member of the United States Navy Band is murdered in her home, Pride looks after the victim's nephew, who is the only witness to the crime.

The NCIS team investigates when a Marine corporal who is an amateur race car driver is in a fatal crash on the track.

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.

Gates is stuck in a complicated living situation; Abby and Kovac consider hiring help as they juggle work and the new baby; Neela is disappointed when Dr. Crenshaw (J.P. Manoux) assigns menial jobs instead of surgical procedures.

Abby prepares to return to work; Kovac tries to recall his treatment of stroke patient Curtis Ames (Forest Whitaker) as he prepares for court.

Dr. Kovac fears for the worst as he awaits the jury's decision between himself and Curtis Ames (Forest Whitaker); Ray gets jealous when he sees Neela and Gates flirting.

Abby and Kovac hire a nanny to care for their son; Morris and Sam treat a belligerent patient who seemingly has the flu, but he refuses treatment when they discover his condition is more complicated.

Abby and Kovac argue about a diagnosis when a woman comes to the ER with signs of spousal abuse; Gates, Abby and Neela must quickly determine a child's ailment when a group of confused homeless kids enters the ER.

Abby responds to a bus crash; Neela accepts an invitation from Gates; Pratt confides in Dr. Weaver about his brother.

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

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

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

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

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

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

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

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

Pride needs to protect a family friend engaged to the prime suspect in an ongoing NCIS and FBI cartel case.

Sebastian goes under cover; Patton practices his old gambling skills; Pride and the team embark on a perilous plan to trap Garcia.

After Pride travels to a deep-sea oil rig for a murder investigation, the team uncovers a gas leak that's on the verge of causing a catastrophic explosion; Sebastian starts his NCIS special agent training.

After thousands of classified government files are stolen, the NCIS team searches for an underground group of hackers who were co-founded by Elvis Bertrand, Pride's old contact.

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.

A motivational speaker is pushed off a hotel balcony, then her daughter is abducted.

Detectives uncover an extensive list of suspects after a gunman storms City Hall, killing a councilman and a water inspector.

Detectives investigate the strangling of a peace activist who had a very confrontational approach.

A woman witnesses the shooting of a low-level drug dealer, then she is murdered before she can identify the killers.

Briscoe and Green search for a killer and a motive when parts of an East Village resident's body are discovered in different trash piles.

After an elderly woman is found beaten to death in her apartment, detectives discover she was the lead witness in the deportation prosecution of a reputed Nazi war criminal.

Jack McCoy learns that his old colleague, ADA Daniel Tenofsky, has been murdered, and detectives discover he was living and working under a false identity.

Detectives investigate a slain Hollywood producer's involvement with a mob movie to find a motive for his murder.

When New York's most infamous baseball fan is stabbed to death in a bar, detectives suspect the killer is probably a sports aficionado.

A female Japanese tourist is shot to death, prompting an investigation that leads the police to the victim's husband.

The detectives believe a bride, motivated by greed, killed her groom after the wedding, until they find the murder weapon in her daughter's room.

When a deliveryman is gunned down on his route, Briscoe and Green discover that he was active on a Web site for arranged liaisons and that his wife had just bought a gun.

Terms of the Geneva Convention come into play when the sister of a former inmate at Abu Ghraib prison is suspected of murdering a female Guardsman in the second Gulf War.

The ex-wife of a firefighter who married a rich Sept. 11 widow is suspected of murder.

Teens meet with horrible ends after a classmate's (Devon Sawa) precognitive vision leads to their ejection from a doomed airliner.

Death returns to claim the lives of those who did not die in a horrible highway calamity as they were meant to do.

A high-school senior (Mary Elizabeth Winstead) and her friends must deal with repercussions of cheating death when they survive a terrible roller-coaster accident.

Dr. Pratt has a hard time coming to terms with his brother's newly-discovered sexual orientation; Kovac spots Curtis Ames (Forest Whitaker) outside his apartment but does not tell Abby.

Gates betrays the trust of a homeless boy seeking help for his friend; Curtis Ames (Forest Whitaker) gets a restraining order against Kovac; Neela gets the chance to be part of a special holiday miracle.

Pratt and Hope question whether they are responsible when a patient dies after being prescribed the wrong medication; Meg comes to County General and angrily confronts Gates and Neela about their relationship.

Kovac is jealous when Abby pays a lot of attention to a patient; Meg (Paula Malcomson) pulls a stunt when Gates moves out of the apartment; the authorities want to arrest Pratt after one of his patients dies.

Gates and Neela try to revive Meg after they find her unconscious in her car; Sam thinks she knows who set fire to her home; tensions mount as Ames (Forest Whitaker) gets more desperate for revenge.

Abby and Sam treat an obnoxious aspiring comic (Freddy Rodríguez) who has mysterious symptoms; Pratt finds himself in trouble as he is questioned about the death of a patient; Neela scrubs in on a kidney-donor surgery.

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).

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.

Teens meet with horrible ends after a classmate's (Devon Sawa) precognitive vision leads to their ejection from a doomed airliner.

Death returns to claim the lives of those who did not die in a horrible highway calamity as they were meant to do.

A high-school senior (Mary Elizabeth Winstead) and her friends must deal with repercussions of cheating death when they survive a terrible roller-coaster accident.

NCIS agents McGee and Torres head to New Orleans to partner with Pride and his team in the search for the missing homeland security theoretical terror playbook.

Painful memories come flooding back when a gruesome copycat murder leads to the reopening of a case for Wade.

Pride's longtime friend, state and military attorney Rita Devereaux, asks NCIS to investigate the disappearance of a JAG lawyer who specializes in classified cases and volunteers at a private military academy.

A highly skilled special operations Marine assaults six men in a bar, sending the NCIS team on a city-wide manhunt.

Tammy is reunited with her ex-husband, Ethan McKinley - who embezzled millions in Katrina relief funds - after he's tied to the murder of a crime boss' son.

A deadly accident at a naval base exposes a unit of Seabees to a super virus and leaves the rest of the base and the city of New Orleans at risk for an outbreak; Wade is infected with the virus and given hours to live.

Lasalle must investigate his former partner in the Vice unit after the NCIS team finds a link between an international drug ring and the New Orleans Police Department; Rita looks into a connection between the mayor and illegal activity in Clearwater.

Team Scorpion attempts to save a man stuck on the edge of a massive sink hole that could permanently destroy the Los Angeles water supply.

Team Scorpion's job to find sunken treasure goes awry when Walter and Paige's boat explodes, leaving them lost in the middle of the Pacific Ocean surrounded by sharks.

Walter and Sylvester enter an international chess competition under cover on foreign soil in an effort to extricate a U.S. spy before her identity is exposed.

Happy, Sylvester and Cabe suffer from life-threatening, fear-based hallucinations after a simple mission to protect a vital seed bank goes awry.

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

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

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

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

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

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

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

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

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

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

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

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.

Pride listens in on a wiretap of Mayor Hamilton; the NCIS team investigates when Navy weapons get stolen in a train heist; featuring musical performances by Sheryl Crow.

The murder of a Navy chaplain leads Pride to uncover a possible connection between Mayor Hamilton and illegal activity taking place in the city of Clearwater; Percy continues to face repercussions of her choices on a previous case.

When Pride is spotted tracking one of Mayor Hamilton's accomplices on a crowded street, the suspect opens fire, putting innocent lives at risk before disappearing.

Unable to trust anyone in New Orleans, the NCIS team calls in FBI Assistant Director Isler to help expose and stop Mayor Hamilton's sinister scheme.

While Pride remains on probation after his rogue takedown of the corrupt Mayor Hamilton, his team is closely monitored by a strict supervisor; the team must secretly investigate after the FBI takes the lead on a case involving stolen nuclear waste.

An erratic whistleblower who calls Pride her mentor kidnaps him to help her locate a serial killer targeting young women in the Gulf of Mexico.

The team joins forces with FBI Director Isler after a Russian operative with intelligence on sleeper agents disappears; Tammy partners with former sleeper agent Eva Azarova to assist in the disappearance.

The death of a prison gang member leads Fontana and Green to suspect the victim's former associates until they learn the deceased also had a running battle with a hard-nosed corrections officer.

Detectives investigate the deaths of two college students and find both were participating in a pharmaceutical company's secret testing program for an antidepressant that has resulted in many suicides.

An illegal firearms sting backfires when two officers are slain, and Green poses as a gun buyer to try to capture the killers, who were able to identify the officers via a Web site identifying undercover cops.

McCoy must determine whether charges should be filed in civil court or in criminal court when a novelist's death seems to have been caused by careless liposuction, but Branch finds a recurring pattern of negligence by the doctor.

McCoy takes the issue of gay marriage before the state's Supreme Court when he is unable to compel a man to testify against a crooked developer because the two say they are married.

The detectives proceed with skeptical caution when a radio personality, known to stage fake muggings for publicity, claims to have been shot and almost killed.

A philandering jeweler with ties to the Russian mob is one of four people shot to death on a sidewalk, and Fontana and Green learn the victim was cooperating with federal authorities until his murder.

After a bloody massacre of heroin dealers, Fontana and Green pinpoint a drug-dealing Afghan warlord as their primary suspect, and McCoy and Southerlyn prosecute despite pressure from the State Department.

Fontana and Green reluctantly investigate after a motorist strikes a child-murderer and leaves him for dead, and the evidence they uncover leads McCoy to a startling discovery.

When a wealthy venture-capitalist is found dead in his home, Fontana and Green zero in on the victim's young wife (Andrea Roth) and her contractor boyfriend (Daniel Sunjata).

Evidence in the shooting death of a rap legend seems to point to his young protege (Sean Nelson), who has been cutting his own music on bootleg CDs, so Fontana and Green listen for clues in the lyrics.

When nine flu victims suddenly die, Green and Fontana learn that all had been injected with a fake vaccine, which leads to the arrest and prosecution of a longtime con man.

When a controversial conservative talk-show host is shot to death, detectives sift through many possible suspects, eventually focusing on the man's widow and a woman who may have been stalking her.

A man strangled in his rent-controlled apartment leads detectives to the building's owner, who wants to convert the building to a co-op, but a basketball player's fingerprints are found at the scene.

A law clerk (Julia Roberts) researching a client's health case stumbles on a cover-up of a contaminated water supply in a desert town.

Raised by their aunts, two sisters (Sandra Bullock, Nicole Kidman) use different means to avoid a family legacy of witchcraft.

Raised by their aunts, two sisters (Sandra Bullock, Nicole Kidman) use different means to avoid a family legacy of witchcraft.

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.

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.

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.

Arriving for the department dinner, the staff learns that surprise nuptials are about to take place; Ray cannot handle seeing Neela and Gates together.

Kovac and Abby acclimate to their new roles as husband and wife; Hope and Morris enjoy the honeymoon suite; Pratt hopes to win over a new woman; a new doctor (Stanley Tucci) in the ER means business.

The new chief prepares to make changes in the ER; Kovac postpones his honeymoon to travel to Croatia to be with his ailing father; Sarah fears she might be taken away.

Abby, Pratt and Morris try to figure out how to handle Dr. Morretti's strict new ER procedures; Gates frantically tries to find out what happened to Neela; Gates finds out that a patient was responsible for the explosion at an anti-war rally.

Dr. Moretti continues to institute new measures that cause many of the ER doctors to despise him.

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

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.