When Nicholas Helman resurfaces to carry out a killing spree, the team is forced to get help from the one person who knows him best -- his protégé, Murdoc.

MacGyver and Desi help a group of Syrian refugees who are being pursued by human traffickers; Bozer is trapped in Oversight's car, and it's rigged to explode.

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.

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

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

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

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

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.

The team's investigation into the death of a young woman, killed after being auctioned off at a charity event, leads to a plot that could put the entire city in jeopardy.

When a Marine recruiter is murdered, the team delves into the world of military enlistment to try to find the killer; Natalia must face her ex-husband when he asks out one of her co-workers.

The team must find a suspected terrorist, who goes on the run after a failed attempt on her life.

Horatio, the lab's night shift and Calleigh's ex-boyfriend must find evidence that proves Natalia's innocence when she is accused of her ex-husband's murder.

Horatio and the bomb squad must defuse a land mine before it detonates; Delko is sued for his role in a domestic dispute.

Hijackers take a truck full of confiscated weapons, and Horatio links the crime to Clavo Cruz; a confiscated missile launched into the courthouse helps Clavo escape; a member of Horatio's team is fatally shot.

A member of the team fights for his life after being shot in the head; the hunt for Clavo Cruz continues.

The team investigates when the parents of a baby sitter in an upscale neighborhood are murdered; key evidence leads Horatio to expose a doctor who has dirty secrets.

Evidence suggests foul play after a member of a hunting group is mauled by a bear.

When a wealthy real-estate developer is killed, the team suspects his wife, then realizes that she is a triplet with identical sisters.

Horatio suspects that owners of an American Indian casino are involved in a murder victim's scalping.

The team investigates the death of a movie star who was on the verge of exposing damaging secrets.

A skull smashes the windshield of a car driven by a group of teenagers on the freeway; a trail of suspects leads Brennan and Booth to a strange cannibalistic society; Cam suggests that Angela hire a private investigator to find her ex-husband.

Brennan and Booth investigate when a soccer mom is blown up in her minivan; the investigation uncovers that the woman was a member of the National Liberation Army.

The team investigates a footless corpse that was found in the woods; Brennan and Booth's questioning leads to several suspects, including the victim's wife; Angela agrees to undergo hypnosis to remember her former husband's name.

When the founder of an organic supermarket chain is found dead, Brennan and Booth suspect foul play by a rival farmer; the two agents visit a new psychiatrist, who warns that the FBI may separate them.

When mummified remains are found at Halloween attractions, Brennan and Booth realize that they must find the killer by Halloween or there will be another death.

The team suspects colleagues when the remains of a young Jeffersonian intern are found in the building's incinerator; Booth poses as Cam's boyfriend and accompanies her on a family get-together.

When high-school classmates reunite to unearth a time capsule buried 20 years earlier, they find the corpse of an adolescent friend inside; while combing through the victim's life, the team members rehash their own teen years.

After construction workers find an archbishop's body with the kneecaps surgically removed, the team returns to the case of the Widow's Son serial killer.

Three days before Christmas the body of a bearded man in a tailor-made Santa outfit turns up in a sewer; Brennan visits her father in prison and plots a nontraditional holiday reunion.

When the remains of a professional motorcycle racer are found in a hot spring, the team suspects his rival to be the murderer; Dr. Lance Sweets forces Booth and Brennan to accompany him on a double date.

Brennan and Booth investigate the college-basketball world to determine who is responsible for the murder of a player on a nationally ranked team.

After a woman's car is run off the road, only her baby survives; Booth and Brennan go to the woman's hometown to investigate.

Toby and Michelle investigate a string of high-tech thefts in Vancouver.

Toby and Michelle search for a dangerous gang while feeling the pressure of the new police superintendent.

When Tia's colleague is targeted by a hotel owner, Toby pushes for an investigation.

Toby and Michelle search for a killer suspected of taking national defense secrets.

When an 8-year-old is found dead on the Appalachian Trail, the team searches the forests for a man targeting children.

The team pursues a killer who targets women; Hotchner turns to an FBI cadet for help.

After helping a man get parole, Morgan regrets his decision when the man murders someone shortly after being released.

A series of bizarre, ritualistic murders brings the team to Miami; Reid experiences hallucinations and blinding headaches.

The team pursues two young lovers on a killing spree; Prentiss receives frightening news.

The team investigates unusual murders in Los Angeles, and more information about Prentiss' past arises.

The BAU heads to upstate New York to investigate mysterious disappearances; Prentiss receives troubling news about a former colleague.

Reid's ability to connect with an autistic child may prove helpful in finding the boy's missing parents; two former colleagues help Prentiss search for an old adversary.

After a series of murders, Prentiss becomes suspicious of a former nemesis (Sebastian Roché) and fears for the safety of her team.

Prentiss prepares to confront her nemesis at last; the team asks J.J. to help find Prentiss and capture Doyle.

The team must stop a gang of suspected murderers that is targeting a new victim nightly.

The team must investigate targeted killings in Florida while each member is dealing with feelings about losing Prentiss.

A stalker in San Diego targets college students; Strauss scrutinizes the team after the loss of Prentiss.

The team travels to a North Carolina town where one woman was found badly injured and another is missing, and discovers those may not be the only victims.

The team investigates when bodies are found buried beneath the ocean floor off Florida; Morgan is rattled when his aunt thinks her missing daughter is one of the victims.

The team investigates a suspected human trafficking ring; Hotchner suggests changes are coming; J.J. returns to the team.

A Senate committee questions the members of the BAU team; a familiar face may help keep the team united.

The BAU team investigates a series of murders in Oklahoma; Reid gives JJ and Prentiss the cold shoulder.

After a mass murder at an Internet security company, evidence indicates that the person responsible is not a typical serial killer; Prentiss is required to complete recertification training.

A killer targets survivors of a high-school massacre, who have gathered for a reunion; Hotch fears that his son is being bullied.

Two American tourists go missing while doing a scavenger hunt through some of the world's most dangerous countries; the Phoenix team goes under cover as backpackers to find them and bring them home alive.

A cunning new adversary's carefully crafted plans force Mac to make an impossible choice: save the life of a friend or save the lives of hundreds of innocents; Mac receives new information that will drive a wedge between him and his father.

Matty's ex-husband, Ethan, asks her for help when a criminal organization kidnaps his wife and daughter; Matty must decide if she's willing to commit treason to help Ethan; Riley joins Billy Colton and Mama Colton on a mission to Paris.

Ex-MI6 agent Russ Taylor recruits former Phoenix Foundation members Mac, Riley, Bozer, Matty and Desi to hunt down a bioweapon that's planned to be used by a mysterious organization for a devastating attack on a major US city.

Gen. John Acosta recruits MacGyver to steal a highly classified project from a military lab to find flaws in its security.

MacGyver and the team are on a plane that's in the air when the pilot has a heart attack.

As MacGyver works quickly to rescue survivors from a collapsed building in Germany, he discovers a new safety threat -- an undetonated bomb from World War II is hidden beneath the rubble.

In an attempt to find the main players in the Codex and cut off their match-fixing funding, Desi goes under cover to infiltrate a soccer team and find the corrupt player working with the shadow organization.

While investigating a case involving a headless corpse, Brennan and Booth encounter Ichabod Crane and Abbie Mills searching for answers of their own; Brennan and Booth come up with Halloween pranks.

Two sanitation workers (Sal Vulcano and James Murray) find a U.S. senator's corpse in a street sweeper; Aubrey looks into Jessica's past.

An escape artist's corpse is found in the woods; Booth and Brennan try to decide if the tooth fairy should visit Christine; Angela works on her photography with Sebastian Kohl (Gil Darnell).

A political journalist is murdered after publishing an article regarding corruption in the NSA; Hodgins' paranoia increases as members of the team realize they are being monitored; Brennan plans a surprise for Booth; a Thanksgiving celebration.

Booth and Brennan go under cover at an Old West-style shooting competition; Angela and Hodgins talk about the future; Cam and Sebastian grow closer.

The team investigates a police officer's murder; the team decides what is important to their futures.

Hodgins navigates life in a wheelchair; when a public defender is murdered, several of her previous clients had motives to kill her.

The team investigates the death of a men's rights organization founder who may have been the victim of domestic abuse; Brennan loses her temper during an interrogation; Angela and the team struggle with Hodgins' bitterness.

The team hunts for a serial killer who appears to have sinister interactions with the victims' bodies before dumping them; Booth and Aubrey consult a behavioral analyst to help find clues to the killer's identity.

A suspect in the murder of a convicted felon who had been released to a halfway house has ties to Booth; Brennan testifies at an FBI hearing about her assault of an unarmed suspect from a previous case.

The team investigates the death of a private investigator found frozen after being dumped in the Potomac; Aubrey finds shocking information connected to his father's whereabouts.

The team investigates the death of an a cappella singer whose body was found in a lab rat; Hodgins applies for an experimental nerve regeneration study; Booth tries to plan a summer trip with Parker; a new intern joins the lab.

An intoxicated college student discovers the dead body of a Secret Service agent just before a scheduled presidential visit to the area; former intern Dr. Colin Fisher leads the investigation while Brennan battles a case of the flu.

A documentary crew producing a television segment on the Jeffersonian's Medico-Legal lab follows the team as it investigates a corpse found in a landfill.

Booth's hockey knowledge comes in handy when the team investigates the death of a player whose headless corpse was left in the river; Hodgins and Oliver use drones to see who can retrieve the victim's head.

The investigation into the murder of a billionaire explorer who went missing 10 years earlier reveals Dr. Clark Edison as a suspect; Cam's sister visits to help with wedding plans.

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 team investigates the copycat murder of an unsolved case from 150 years ago that spawned a legendary ghost story; Gregorio is spooked when the case is connected to a recent séance and a local medium.

Sebastian is placed on administrative leave after being questioned by the FBI about a foot chase; Pride and the team attempt to clear Sebastian's name.

The murder of a petty officer leads the team to a woman who is targeting men with high security clearance; Lasalle's father arrives to discuss the family business.

The team investigates after a clinical trial in which brain implants are put into veterans is hacked; Patton must work alongside his ex-wife, who spearheads the project.

Wade's son asks Pride for help after being attacked and discovering his girlfriend is missing; Pride must meet with a therapist to discuss his process for solving cases.

Danny must hold completely still as technicians disarm a bomb he accidentally activated; McGarrett tries to distract his partner by sharing a story about a tough case.

The murder of a computer hacker prompts an investigation, and McGarrett tries to stage a reunion.

McGarrett thinks a smart, seductive therapist (Vanessa Marcil) murdered one of her patients; one of Doris' former targets seeks revenge.

A botched robbery puts Max and his crush (Rumer Willis) in danger; when a stalker targets a supermodel, Danny must come to her rescue.

McGarrett and a little girl are taken hostage by an armed man (Tom Arnold) during a camping trip with Grace; Kono meets Adam's brother, who was recently released from prison.

McGarret and Catherine meet a boy whose father is missing and could be in grave danger.

When a professor is murdered, his boss, his teaching assistant and a student all come under suspicion.

When Chin is kidnapped and left in Halawa prison dressed as an inmate, he must escape before the other prisoners recognize him.

The night before an election, the governor asks the team to investigate when a prostitute is found dead in a missing congressman's bed; Danny waits for a custody decision.

A double amputee (Peter Weller) goes after the police officers responsible for his injuries -- including McGarrett.

The team investigates the murder of a Lua master; McGarrett has a private investigator tail his mother.

Danny obsesses about the big game during all-pro weekend in Hawaii; a star football player helps the team investigate the murder of a tech executive.

When a murder victim lands in Dog the Bounty Hunter's vehicle, Catherine goes under cover and investigates at a local roller derby.

The team struggles to narrow down a suspect when threats against a company that endangers sharks turn deadly; Kamekona tries to earn his helicopter license.

McGarrett tells the story of his last mission in North Korea as he and Catherine cross into the country to retrieve a friend's remains.

Steve and the team allow a talk-show host (Aisha Tyler) and her crew to follow them for a day, but a run-in with Wo Fat leads to danger.

Walter and the team ask a troubled former associate for help when a nuclear reactor in Los Angeles is on the verge of a cataclysmic meltdown.

After being accused of destroying a priceless piece of art, the team must pass a mandated psych evaluation; Paige asks the team for help when Ralph is hesitant to go to the school Halloween party.

Three convicts -- including a brilliant hacker -- escape from prison; Paige tries to manage Ralph's expectations when his dad returns.

A musician -- who created a controversial algorithm to generate hit songs -- helps the team investigate the murder of a music blogger; Drew seeks help connecting with his son.

When a torpedo hits a fishing trawler at sea, the entire Gulf Coast is in jeopardy as Pride and NCIS race to find the submarine before it can strike again.

A Navy therapist who is working to get justice for victims of sexual assault is murdered; Carter's mother confronts him when he refuses to talk to the FBI for a background check on her behalf.

As Pride and the team continue the investigation of an officer's assault and the murder of her therapist, NCIS zeroes in on a suspect who's been working the system for years; Carter and his mother talk about how they'll move forward after a mistake.

Pride and the team are on the hunt for a kidnapped 14-year-old and discover that her father, who will soon have custody of her, is a radical survivalist living off the grid.

When a petty officer is shot down by a sniper, Pride and NCIS hunt down the killer, only to find that he may not be acting alone; Rita tells Pride that she has been offered a compelling job.

Sebastian's life is in danger when a criminal he put behind bars escapes police custody; Carter is tasked with keeping Sebastian in protective custody; Carter and Hannah's flirtation is fun gossip fodder for Tammy and Sebastian.

After a Molotov cocktail is hurled into Pride's bar, evidence leads him to his old nemesis, Sasha Brousard; Tammy uses her profiling skills on Hannah and Carter with shocking accuracy.

The team investigates the deadly bar bombing and impending criminal turf war involving Sasha Broussard; Pride must come to terms with having Connor in his life; Carter and Hannah work to define their new relationship.

Pride directs the team to link Sasha to the recent attacks in New Orleans; Carter and Tammy search for a stolen highly trained military dog; Pride and Rita make an important decision about their wedding.

Pride and Rita plan their wedding; the FBI arrests Connor in connection to the bar's firebombing.

On the eve of his wedding to Rita -- and Connor leaving for the Witness Protection Program -- Pride must track down who attacked Jimmy and Connor, while he navigates Sasha's ulterior motives regarding her son.

The team investigates the death of a petty officer whom Pride had mentored; Brody searches for a place to call home.

When a Navy lieutenant on liberty dies of bubonic plague, NCIS Special Agent Tony DiNozzo helps the New Orleans team as they try to control a potential outbreak and find the source of the infectious disease.

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.

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.

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.

Cabe's ex-wife needs the team's protection after she discovers evidence that suggests a prominent congressman's death involved foul play.

The team must recover stealth technology from a military plane that was shot down in Bosnia; Walter's sister visits with Sylvester at the garage.

Sylvester ends up in critical condition after accidentally triggering an explosion during an investigation; the team must remain focused on finding the culprit.

On Christmas Eve, a boy is trapped in a beach-side cave, where the rising tide threatens his life; the team races to find a way to save him.

A nasty divorce gets worse when the husband's mistress turns up dead, and the body count continues to rise as the complicated relationship unravels.

Horatio must fire a member of his team when the problems of that person taint the current investigation.

After a suspected carjacker is killed, the team learns that he may have been involved in drug smuggling off the shore of Miami.

When a serial killer is caught and identified as having an extra Y chromosome, the team mistakenly thinks that it has closed the case.

A hostage situation turns into murder; Horatio thinks one of the suspects may be his son.

The team heads into the jungle to try to find a missing witness in a high-profile murder case before the assassins that are after her.

An afternoon pleasure cruise turns into a nightmare when pirates attack and take hostages.

The team must stop a vengeful bomber; Danny's fun-loving brother (Dane Cook) visits unexpectedly.

A science-fiction fan dressed as a superhero is murdered; McGarrett receives a visit from a CIA agent interested in finding Yakuza.

While on a hike, Danny and McGarrett find a murder victim; Chin Ho and Kono go home to visit their ailing aunt.

After a famous photographer is murdered while doing a magazine shoot, Danny is happy to learn that he will be interviewing the swimsuit models.

After receiving valuable information from Agent Jenna Kaye, the team closes in on Wo Fat; Danny is exposed to a deadly neurological agent.