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.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

A Southern lawyer (Matthew McConaughey) and his legal assistant (Sandra Bullock) defend a black man (Samuel L. Jackson) for killing his young daughter's white attackers.

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 Memphis law school graduate (Matt Damon) aids a battered wife (Claire Danes) and fights a corporate lawyer (Jon Voight) for insurance benefits for a dying man.

Ross treats a baby for an overdose; Carter makes a surgical error; Hathaway hauls in a stroke victim; Boulet gives Benton a decision; Lewis and Weaver clash.

Benton dislocates his finger and goes to Carter for help; Lewis' gastritis patient won't stop eating.

Lewis considers adoption for her niece; Carter performs injured Benton's surgical duties; Greene and Ross clash over an AIDS patient's treatment.

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.

After accepting a position in a private practice, Dr. Ross finds an injured boy trapped in a rural storm drain; staff helps a young hit-and-run victim.

The hospital asks Dr. Ross to stay on staff; Lewis hires a patient with nanny experience; suicidal teen; Jeanie Boulet is assigned to work with Benton.

A Memphis law school graduate (Matt Damon) aids a battered wife (Claire Danes) and fights a corporate lawyer (Jon Voight) for insurance benefits for a dying man.

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 Southern lawyer (Matthew McConaughey) and his legal assistant (Sandra Bullock) defend a black man (Samuel L. Jackson) for killing his young daughter's white attackers.

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.

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.

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

When the team and Walter's parents visit Megan in the hospital, a deadly fungus outbreak occurs, forcing everyone into quarantine.

The members of the team go under cover at a university in order to track a hacker who is putting the world economy at risk.

Team Scorpion must stop a catastrophe on Christmas Eve when heavy rain creates a large crack in a dam, putting an entire town in danger.

The members of Team Scorpion brave subzero temperatures in Antarctica to save a United States Special Forces unit; Toby risks his life to save Happy.

Sylvester's father, a retired general, asks the team for help when he thinks a dictator in Africa has uncovered weapons of mass destruction from World War II.

The members of Team Scorpion are asked to help NASA with a top-secret rocket launch, but they must sabotage their own mission when Walter's date finds a bomb strapped to her chest.

When a powerful earthquake hits Los Angeles, Team Scorpion must prevent a pinched gas line from causing a massive explosion.

Team Scorpion must stop an influx of drugs that are being smuggled into the country via drones; an ultimatum is issued.

Sylvester wins big on "The Price Is Right"; the team must infiltrate a high-end car smuggling operation that is preparing to ship weapons to South America.

The team investigates after the Los Angeles blood supply is hacked and tainted, which leaves a young girl who is in need of a heart transplant in peril.

The team must save Cabe when he is captured during a secret mission in Djibouti, Africa, with his protege, Tim Armstrong (Scott Porter).

A deadly tornado threatens the lives of Team Scorpion during a mission to recover the remains of fallen Marines in Vietnam.

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.

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.

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.

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

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.

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.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

At a carnival, young Josh Baskin wishes he was big, only to wake up the next morning and discover his wish came true. But the more Josh experiences life as an adult, the more he longs for the simple joys of childhood.

An upstart plastic surgeon (Michael J. Fox) gets stuck in a one-doctor Southern town and falls in love with a local (Julie Warner).

A high-school student's popularity soars when it is discovered that he is cursed with the mark of the werewolf.

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.

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

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

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).

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

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

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

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

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

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

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

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

The team uncovers a sinister plot by a private detention center contracted by the government to house undocumented immigrants; Lasalle and Sebastian travel to Alabama to search for Lasalle's missing brother.

Navy Lt. Max Landry asks the New Orleans field office for help when he suspects his girlfriend is a spy; Lasalle faces another devastating dead end as he searches for his brother's last known whereabouts.

Lasalle hopes to avenge his brother's murder by tracking a drug ring in Alabama he believes is responsible; when Pride assists with the case, he crosses paths with Eddie Barrett, an elusive individual who knows more than he is sharing.

Following a natural gas explosion at a movie theater, the team discovers the gas company has been hacked and more explosions could be triggered.

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.

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.

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.

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

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

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

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

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

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

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

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

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

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

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

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

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.

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.

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

Carter skips graduation in order to comfort a critically ill child; Hathaway takes a stand against health insurance providers.

Carter works alone on the night shift during the hospital's July 4th picnic; Jeanie Boulet and Dr. Benton await the results of their HIV tests.

As a new chief of staff takes over, rumors maintain County will be forced to close because of budget cuts.

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.

A night of partying ends in disaster for Dr. Ross and his date; Benton operates on a teen with Crohn's disease; Carter rooms with Gant.

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.

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

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

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

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

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.

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

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

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 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.

Mobsters and lawyers (Susan Sarandon, Tommy Lee Jones) hound a boy who knows about the missing corpse of a U.S. senator.

A law-school grad uncovers a sinister secret about the Tennessee firm that made him an offer he couldn't refuse.

A Washington reporter (Denzel Washington) helps an on-the-run law student (Julia Roberts) who knows too much about a government cover-up.

A Halloween-costumed patient scares the doctors; Carter breaks bad news to an injured youngster; the Healthmobile travels to a dangerous part of town.

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.

A Washington reporter (Denzel Washington) helps an on-the-run law student (Julia Roberts) who knows too much about a government cover-up.

A law-school grad uncovers a sinister secret about the Tennessee firm that made him an offer he couldn't refuse.

Mobsters and lawyers (Susan Sarandon, Tommy Lee Jones) hound a boy who knows about the missing corpse of a U.S. senator.

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

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

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

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

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

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

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

The team is hired by the Department of Defense to test the security at Fort Knox by trying to break in and steal a precious artifact.

In Chernobyl, Sylvester and Paige become trapped inside a decaying nuclear reactor that the team is trying to repair before a tragic meltdown.

The team must outsmart mentally unstable ex-Scorpion member Mark Collins when he kidnaps Toby and threatens to kill him if his demands are not met.

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.

On election day, someone tries to create turmoil in the U.S. presidential election, and Team Scorpion is called to investigate.

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.

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

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

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

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

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