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.

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 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.

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.

Six months after starting a new life with her family, Brennan becomes interested in a case to which she has personal ties; an FBI investigation begins when Booth goes missing.

Booth's location and condition becomes more mysterious when it's discovered that FBI Agent Miller (Kim Raver) has been hiding vital information; Arastoo makes a significant decision.

When Brennan officially returns to work at the Jeffersonian and Booth resumes his position at the FBI, remains are found at a fish farm; Hodgins encourages Angela to exhibit her photography work; Cam faces a difficult decision.

Brennan enlists the help of a fellow forensic anthropologist in the investigation into the death of a real estate agent whose remains appear to have been destroyed by coyote-wolf hybrids.

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.

Mac and Jack attempt to rescue a billionaire's son after he is kidnapped by a former Navy SEAL.

While helping a friend in Puerto Rico, MacGyver is taken hostage by robbers who are attempting to steal $2 million from the bank his friend manages.

Mac and Riley are called in to examine a mysterious object that crash-landed in the Nevada desert; Riley uncovers new information about Mac's father but questions whether to deliver it to him after he says he needs to move on.

MacGyver gets a shocking surprise when he tries to tell Matty he's quitting the Phoenix Foundation.

Three months after quitting the Phoenix Foundation and moving to Nigeria, Mac puts aside his differences with his father and returns when he hears Jack is the target of a murderous dictator he double-crossed.

Jack receives an emergency distress signal from one of his old Delta buddies who has been accused of terrorism in a foreign country; MacGyver and Jack quickly recruit the rest of Jack's old Delta team and stage an unsanctioned rescue operation.

MacGyver and the team go under cover on a college campus to find an operative who is recruiting students to carry out deadly attacks; Jack joins bounty hunter Billy Colton in the hunt for a bail jumper.

MacGyver and Riley must find a way to drive a tanker filled with liquid oxygen through a region occupied by rebels and deliver it to a children's hospital; Riley helps MacGyver decide whether or not to allow his father back into his life.

McGarrett and the team search for a missing bus full of school children and those responsible for the crime.

On the night before Chin Ho's wedding, the team's investigation into a man left to die in an abandoned bunker intersects with Capt. Fryer's case.

When a teenager is murdered, the team must determine why she was targeted and if the person responsible was a hired professional.

Chin Ho shares news about Joe White that rocks McGarrett to his core; Danny is forced to play midwife when his ex goes into early labor.

When Danno and his family are targeted by a vengeful dirty cop from Danno's past, the team steps in to help.

When the team almost causes an international incident, Lt. Gov. Denning decides that one of them should be fired; Chin Ho faces the harrowing task of choosing a Valentine's Day gift for Malia.

The team investigates when a man dressed as a Hawaiian NaKoa warrior is found dead near the site of a war re-enactment.

The team crosses paths with a retired NYPD bomb expert while investigating the death of a famous talk-radio host.

When McGarrett's sister is arrested for smuggling diamonds, he enlists the help of an ex-con to set up a sting.

Max reveals shocking information about his childhood to help the team track a serial killer who may have ties to Max's past.

When a suspect threatens to release a deadly virus, the Five-0 teams up with Special Agents G. Callen (Chris O'Donnell) and Sam Hanna (LL Cool J).

When McGarrett finally gets to Wo Fat, he is stunned to learn that the Japanese Yakuza wants them both dead.

The team goes on a manhunt when one of its own is killed; a team member must choose which one of their kidnapped loved ones will survive.

Following the murder of an important family member, the team searches for Delano and Wo Fat.

McGarrett asks Catherine to help find his mother; the teams seek assistance from August March (Edward Asner) with a deadly art heist.

Danny and McGarrett's day at sea takes a deadly turn when their boat is hijacked.

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.

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.

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

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.

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.

Evidence suggests that the man responsible for saving a lieutenant's life is a soldier who was captured in Afghanistan.

Special Agent Pride and the team uncover a domestic drug ring -- led by Sonja's childhood friend, Marion Watkins (Samaire Armstrong), that is producing cocaine.

A Navy captain is murdered during an appearance on a local radio show; Pride's daughter comes home to talk about her plans for the future.

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.

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.

Chief Inspector Barnaby discovers the truth behind the murder of a tramp; it is connected to the traditional village fox hunt and its participants.

When a local thief and womanizer is killed with a pitchfork, the residents of Midsomer Mallow fear for their chances in the Perfect Village Competition.

Mysterious events and discovery of his relative's body lead the resident to believe that Jonathan Lowrie's ghost is in their community.

A wealthy family uses their power and influence to distance themselves from a rape and murder investigation.

A priest is shot to death in his church rectory; Horatio and Delko examine the charred remain of a pregnant woman.

Horatio and the team investigate the murder of a 5-year-old girl in a restaurant washroom.

Evidence on a lost, blood-soaked toddler leads the CSI team to her home where each family member's spilled blood tells a tale of horror. Wanda De Jesus guest stars.

The team tries to get inside the mind of a sniper after three people are shot and killed in downtown Miami.

Horatio and the team investigate after the corpse of an unidentified girl is found near an extremely strict rehabilitation camp.

Horatio investigates the stabbing death of a prostitute who is found stuffed under a bed in a hotel room.

Horatio and Speedle investigate the manufacture of lethal drugs at mobile labs; an elderly woman is murdered at a senior citizen home.

A serial rapist is found dead of suffocation; investigators probe the murders of a crematorium owner and a girl found behind the crematorium.

Team members meet an environmental lawyer who has radiation poisoning after they are exposed to radiation during an investigation.

The team investigates the murder of a man found stabbed in a peep-show booth, finding non-human hairs on the victim's body.

A man stands trial for a murder he didn't commit, while Horatio and the team race to find the real killer.

Routine disposal of drug evidence goes horribly wrong, leaving two police officers dead and the CSI team under investigation.

Poisoning is suspected as the team probes the murder of a male stripper found dead in the wake of a female sex party; a deep sea diver is fatally stabbed while underwater.

The team investigates the death of a professor, who was found hanging from a tree after being tortured.

Mac and Jack rush to Mexico to help capture the leader of a drug cartel while the country celebrates Dia de Muertos.

Matty sends the team to Ghana to recover a hard drive from an e-waste landfill that is run by a powerful and violent man, leading them to speculate about what could be on the device.

An Irish military intelligence officer claims to know the whereabouts of a lethal bomb maker whom Mac has been hunting for years.

When a vial containing a deadly virus is stolen from the Center for Disease Control in Atlanta, MacGvyer and team race to recover it before the thief unleashes a global pandemic.

Matty reveals the shocking secret that her husband has been undercover in a criminal organization for eight years; when his status as a CIA agent comes out, Matty needs MacGyver to find and extract her husband before it's too late.

Mac and Jack's mini-vacation is cut short when someone from their past abducts them and locks them in a concrete room; Matty tasks Riley, Bozer and Leanna with stealing a diamond encoded with terrorist intelligence from a princess in Milan.

Mac and the gang team up with a master thief to catch an underworld criminal who hired her to steal a dirty bomb.

A child reappears one year after he went missing -- but the team must work quickly when a trick-or-treater disappears under similar circumstances.

The team has a difficult time finding a common denominator among several male victims in Montana; J.J. struggles with feelings about her sister's death.

The BAU tracks a conflicted killer in Virginia who feels remorseful after committing crimes; Rossi receives a visitor.

The investigation into frozen bodies found floating in a body of water in Nevada leads the team to believe the victims were members of a cult; J.J. confronts her trauma over her abduction.

The team searches for a killer who calls the authorities before committing his crimes; as Rossi prepares for a visit with his daughter, he gets news about the death of an old friend.

The members of the BAU team are brought back to their origins as they look at one of Gideon and Rossi's old cases.

When a hero emerges from the wreckage of an explosion in Indianapolis, the BAU team members must protect him as they try to identify the person responsible before more bombings occur.

The members of the BAU team search for a suspect who may have witnessed abuse as a child; Kate is worried when her niece and a friend make plans with a boy they met online.

When two guards at a maximum security prison are murdered, the BAU team thinks one or more people within the prison walls may be responsible.

The BAU tracks a serial killer in Wisconsin; Kate is faced with trouble when her niece, Meg, starts acting out.

When an up-and-coming congressman's wife disappears, the team investigates his political enemies as potential suspects.

International Unit Chief Jack Garrett (Gary Sinise) and his team requires assistance from the BAU when a family of four is abducted during their Barbados vacation.

When the members of a family are found murdered at their dining room table, the team looks for secrets in their past; Hotch tries to make peace with his father-in-law (Ed Asner).

When a group of teens takes Jonathan Snow (Bobby Hosea) hostage, Chance and Cie (Lucky Vanous, Lisa Thornhill) work to free him.

Chance and Cie get help from Calder when they investigate an incident in which an ATF agent is killed and a boy injured.

Going under cover on a singer's world tour, Chance and Cie (Lucky Vanous, Lisa Thornhill) hope to track down a heroin dealer.

Assistant Attorney General Burton Hardesty escapes his kidnappers after suffering torture and brainwashing.

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.

The team tries to help Ralph when he is taken by the FBI for questioning after his web game play unintentionally reveals a CIA safe house's location.

The team searches for a CIA mole who has been coerced into stealing deadly chemicals; Paige shows Walter how to flirt.

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 investigation of the bones of a shooting victim leads to a counterfeiting ring.

When a body is found clutching a 300-year-old finger bone, Booth and Brennan's investigation leads them to a dive site where a pirate may have buried his treasure.

Brennan wakes up in the bathroom of her New Orleans motel room, bloodied and beaten with no memory of what happened.

While examining a young girl's cancer, Brennan and Booth uncover a bone-smuggling ring.

Booth and Brennan's investigation of an apparent suicide of a protester in Arlington National Cemetery may lead to a military scandal.

Brennan makes a shocking discovery while trying to identify a Jane Doe; Brennan tries to come to grips with her parents' past.

Brennan and Booth investigate the site of a train wreck that includes the bodies of a senator and a high-profile businessman.

The remains of a woman and fetus are found in the Delaware Bay; Brennan and Booth call for a manhunt for the victim's husband; Booth has issues with his ex-wife's boyfriend.

Wrapped in a shroud, the body of a young man lies beside an overturned garbage truck; Brennan's past as a foster child influences her judgment; Brennan and Cam butt heads over their work styles; Cam makes threats.

Brennan and her team match wits with a serial killer to save a girl's life.

Booth and Brennan probe what appears to be a case of jealousy and insurance money when a man is found dead at a construction site, but new clues send them in a different direction.

Brennan and Booth investigate an explosion in a Miami hotel where a young woman had burned to death.

An actor is murdered while filming an alleged cursed horror movie.

The police superintendent interferes with the capture of a murder suspect.

Toby struggles with PTSD after killing a suspect while the IIB attempts to stop an assassination.

A serial killer imitates a past murderer; while on maternity leave, Michelle must return to the IIB in order to save her reputation.

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 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.

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.