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.

When Mac and the team are unable to prevent sensitive intel from falling into Codex's hands, Mac must scale a vertical cliff using only gear he can cobble together himself to prevent the info's transmission.

While on a mission to hunt down a Codex lead, Mac and the team discover Murdoc hacked their comms and has recorded them for months.

Mac and Riley head overseas together to prevent a governmental collapse and inadvertently inhale new, deadly microscopic technology.

Mac, Desi and Russ go under cover during a royal Indian wedding to protect a princess whose policies could put her life in danger; Bozer suspects Riley is up to her old hacking ways.

Mac and the team delve into the world of Italian car culture to track down a crime boss; Mac must lean on Desi when he discovers that he's losing the ability to control his hands; Mac and Desi move in together.

Mac and Desi travel with Bozer to his childhood home when his aunt dies in a tragic accident; they soon discover she may have been murdered for trying to expose the city's contaminated water supply.

Mac and Riley go missing and wake up 24 hours later in a cornfield with no memory of how they got there; they must unravel the mystery and find out how to get rid of the nanotrackers in their bodies, no matter the cost.

Special agents for the Department of External Services, Angus "Mac" MacGyver and Jack Dalton, work to recover a missing bioweapon.

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.

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.

After a father and daughter get kidnapped, a former foe of the BAU returns with very specific demands for Dr. Reid.

Horatio confronts a private investigator (Tom Sizemore) who is systematically destroying the team.

Horatio puts his life on the line when someone tries to take down the team.

In its effort to determine who shot Horatio Caine, the team discovers evidence that leads to some of the most-dangerous people in Miami and to one of its own.

A sadistic crime ring takes advantage of high gas prices when fuel becomes so pricey that citizens of Miami begin killing for it.

When Delko's therapist's daughter is murdered, Horatio and the team race to find the killer before Delko's secrets are exposed.

Horatio and the team face the Russian mob after a savage double murder in the Everglades.

While investigating a murder in a boutique, Horatio learns that Julia's (Elizabeth Berkley) instability has made her a danger to others.

A crane crashes into a Miami high rise, putting Delko and Calleigh in danger, and ruining Horatio's best hope of catching a notorious crime boss.

A man is found stabbed and handcuffed in a hotel room; a prank at the lab threatens an investigation and causes a rift in the team.

The team races the clock to find a baby kidnapped by a killer, to prevent the child from becoming the next victim.

Horatio steps in to prevent a police officer from getting too close to the case when a savage killer runs rampant in Miami.

Horatio looks into Delko's past when a shooter targets the motel where Delko is staying.

While en route to China to identify prehistoric anthropological remains, Booth and Brennan are called upon to solve a murder in midair when the flight attendant discovers a fully cooked human body in the plane's microwave.

Brennan and Booth investigate when a skull and other skeletal remains are found in a nationally protected wooded preserve; Brennan's recently acquitted father (Ryan O'Neal) finds a job as a teacher.

A shallow grave holds the remains of conjoined twins; Booth and Brennan infiltrate a circus community after they discover that the twins were jugglers there.

A man and his son discover a frozen body in a pond; Booth gets advice from one of his hockey idols.

Brennan and the team get a phone call from the Grave Digger, who informs them that Booth has been buried alive with only 24 hours of oxygen.

The team investigates at a fantasy convention when a female science-fiction enthusiast is found murdered.

While bungee-jumping, a couple discover a corpse at the bottom of a gorge; the lab goes into lockdown when an unknown substance begins oozing from the cadaver.

The body of a pregnant 16-year-old athlete found buried in a mound of salt in a city de-icing truck leads Booth and Brennan to the discovery that many of her teammates are pregnant or have babies after a pregnancy pact.

Booth and Brennan are convinced the death was no accident after the half-eaten body of Cam's ex is found in the tiger cage at the zoo, leading the team to hypnotize one suspect (Chad Lowe) to try to jog his memory.

Booth and Brennan investigate when pulverized human remains are found in a garbage bag; Angela's father (Billy F. Gibbons) seeks revenge on Hodgins.

A flattened body is discovered in a bale of compressed cardboard; Booth and Brennan get suspicious when they see Sweets' girlfriend with another man.

Booth and Brennan look for a killer and a motive when it is discovered that a human skeleton is being used as a prop for a death metal band.

The murder of a British spy may be linked to an adulterous dating site.

Toby and Michelle team up with a con artist to catch a human trafficker.

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

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

The BAU investigates when a prisoner escapes and starts leaving behind victims with his unique trademark; the team gets to know its newest member.

When a murder victim is discovered in San Diego and another is found in Los Angeles, the team thinks a murderous duo is responsible.

When one Kansas family goes missing and another one turns up dead, the team looks for a link between the cases; Beth has surprising news for Hotch.

The BAU team pursues an amateur surgeon who amputates limbs from his victims; Reid's calls to a mystery woman create intrigue.

When four men from Oregon go missing, the team looks for a common link; J.J. is upset when her son doesn't want to celebrate Halloween.

The team searches for a killer in Miami who started out slaying animals and then quickly progressed to murdering prostitutes; Morgan asks Reid to join the bureau softball team.

The team travels to Santa Monica when burned bodies start showing up on a pier; Rossi gets together with his former Marine sergeant from Vietnam.

The BAU team springs into action when a school bus full of children goes missing near Washington, D.C.

A popular motivational speaker comes under suspicion when a conference attendee is murdered; Garcia is confused when Morgan doesn't want to attend a dinner honoring a family friend.

When multiple dead men are found, the BAU tracks a killer with ritualistic tendencies; Reid is anxious when faced with an opportunity to meet his mystery woman.

The team tracks a suspect who shares the same style as a serial killer from 30 years ago; someone tracks the BAU's cases and replicates crimes.

With the help of the BAU team, Reid tries to find his girlfriend before it's too late.

As Reid deals with a personal loss, the rest of the team heads to San Francisco after victims are found in the Mission District.

When an author's daughter goes missing on the anniversary of his wife's disappearance, the team investigates the author as a possible suspect.

The team heads to Austin to investigate when victims with watches set to inaccurate times are discovered; the team's stalker gets closer.

Victims of the Replicator, the BAU's stalker, turn up in Philadelphia; the members of the team think they are getting close to apprehending their suspect.

The team investigates victims who were sharing details about their personal lives and inner desires online; Kevin becomes jealous when he finds out that Garcia might have a new love interest.

When the team goes to Morgan's old neighborhood to track an UnSub targeting middle-aged men, Morgan suspects they are looking for someone connected to the man who abused him as a child.

A 25-year-old time capsule opened in a small Colorado town reveals a gruesome discovery and a possible connection to a local police officer's death.

The team heads to Rapid City when two men are murdered in a ritualistic way; Reid mourns Maeve's death.

MacGyver and the team attempt to rescue Jack's former CIA partner who went missing in Venezuela after finding evidence to take down an international arms dealer.

In Malaysia, MacGyver and the team extract a terrorist group's money man who has intel on an impending attack, but when the man is shot, MacGyver must keep him alive in order to learn the terrorists' plans.

Mac and Jack work with a Russian bomb programmer and his alienated handler to defuse a Soviet-era warhead in Moscow; when the antiquated computer breaks down, Mac must find a way to fix it.

MacGyver must fix a sabotaged train to protect a woman who has proof that her boss is selling weapons to enemies of the U.S.

MacGyver must diffuse a bomb planted near the United Nations by his old adversary, the Ghost, then track the criminal down.

When MacGyver goes under cover to break a notorious drug kingpin out of a maximum security prison, he must track the fugitive to the cartel's location to dismantle it after they escape.

When MacGyver faces an international assassin hired to kill him, he must defend both himself and Bozer with only a corkscrew and paper towel rolls; Bozer learns MacGyver's true identity.

In Latvia, MacGyver and his team must defend themselves and a group of U.S. embassy workers from extremists trying to retrieve their leader; Bozer faces an important decision.

The decaying corpse of the Venezuelan ambassador's son is found hanging from a tree.

Brennan and Booth travel to Washington state to determine how a human arm ended up in the stomach of a black bear.

Brennan identifies remains of a 6-year-old boy who went missing from a local park and determines that he was sexually assaulted before being murdered.

Angela and Brennan are caught in a melee at a hip-hop club, when a wall breaks open and reveals a mummified corpse and a stash of drugs.

Brennan and Booth race the clock to tie up loose ends before the defendant in Booth's first FBI case is executed for the crime.

A girl's decomposed remains are found in a refrigerator, leading Brennan to confront her former mentor.

Construction workers find a skeleton in an old fallout shelter from the 1950's and the Jeffersonian is brought in to help identify the remains; when Zack cuts into the bone, he accidentally releases spores of the deadly fungus Valley Fever, causing the team to be quarantined in the lab over Christmas; while everyone tries to maintain the holiday spirit, Brennan buckles down to solve the mystery of the fallout shelter.

Extensive plastic surgery hides the identity of a body whose parts were found near an airport.

When a woman's burned body is found in a car with evidence that her child was kidnapped, Brennan and Booth's investigation leads to a suspect who is in the Witness Protection Program.

Brennan and Booth's investigation identifies a decomposed body found in a local alley as that of a friendless teen.

Booth and Brennan investigate when police find the dug-up corpse of a young woman in the trunk of a Salvadoran gang member's car.

At the scene of a plane crash involving Chinese diplomats, Brennan finds three small bone fragments that did not come from the plane and might have something to do with a local man who went missing five years earlier.

Brennan tries online dating but ends up the target of a shooting when she tries to meet her date at a local restaurant.

When the remains of a filmmaker are found in the ventilation shaft of an underground tunnel, Brennan and Booth discover a subterranean world of homeless people.

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.

The team investigates the murder of a Navy captain who was searching for a priceless 200-year-old fleur-de-lis during the annual Louisiana Pirate Festival.

Pride, Sebastian and Tammy travel to South America after Pride is personally requested by a former colleague to assist with a classified operation that has been compromised.

Percy and Lasalle go under cover at a high-stakes poker game after the organizer targets players with access to a naval research laboratory; Laurel Pride visits her dad during spring break to discuss options after her upcoming graduation.

Pride and his bar patrons are held hostage by a group of volatile thieves.

Gregorio calls on her former behavioral science professor when the team's latest case matches one she studied during FBI training.

A journalist posts a scathing article documenting Pride's "reckless use of justice"; the team is concerned about the fallout from the piece and the confidential information revealed; Rita Devereaux tells Pride it is a coordinated attack on him.

Pride assembles an off-the-books team to search for a loophole when he faces a grand jury indictment for abuse of power.

Pride's teams uncover a sinister plot during the New Orleans Tricentennial Fleet Week celebration.

An escaped convict who wants Five-0 to prove his innocence abducts Danny and McGarrett; Grace punches a person at school.

The team investigates the death of a real estate agent whose body was found in the walls of one of his listings; Danny's mother visits with unexpected news.

A triple homicide is linked to a secret, downed Chinese satellite; Danny's mother goes on a ride-along with Grover.

A man is shot as his daughter is abducted; Danny tries to reunite his parents; Jerry finds a code on McGarrett's champ box.

The daughter of a macadamia nut tycoon is killed with a stiletto heel during Chin's high school reunion.

Danny and McGarrett are trapped inside an abandoned building rigged to explode.

A murder investigation leads the team to uncover a possible terrorist cell planning an attack on U.S. soil.

Catherine and McGarrett go to Afghanistan to help a young boy, whose family saved Catherine years earlier.

Grover is forced to steal $100 million when a nemesis kidnaps his daughter; Wo Fat goes back to Oahu after escaping from prison.

O'ahu goes on lockdown as the team looks for a terrorist who is using weaponized drones on civilians; McGarrett and Danno attend a review with a psychologist.

While a Navy Seal is on a secret mission, his young daughter is kidnapped; Danny must find $18.5 million in order to save his brother.

Three female thieves unwittingly make themselves serious targets when they take something during a tour bus robbery; Danny searches for his brother's money.

When a man from Detroit is killed on the streets of Oahu, the team is shocked to discover the killer's motives; Chin risks everything to help Danny.

McGarrett meets a woman who helps him reopen the last cold case his father investigated before dying.

On Halloween, the team hunts a serial killer who mimics murders from a cult slasher film; Jerry is abducted by counterfeiters.

McGarrett experiences what would have happened to the team had they taken a different path when he is kidnapped by Wo Fat.

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

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

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

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

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.

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.

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.

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

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

The members of the team go under cover on a movie set in Kazakhstan in hopes of disabling a Soviet-era nuclear missile being sold by terrorists.

A nefarious virus is uploaded to Walter's computer, turning the team's new "smart" building project into a death trap with people locked inside.

The CSI team, with the help of local tipsters, fights to save a neighborhood on the brink of being taken over by a violent street gang.

The CSI team uses radical technology to unlock the secrets of a man's mind when he shows up covered in blood with no memory of where he has been.

When a murder occurs during a horse race, Horatio discovers that Ryan has a personal connection to the case.

Alexx Wood comes back when a murderer puts Ryan's and Calleigh's lives at risk.

The CSI team makes a shocking discovery about its murder victim; Horatio tries to save his son from Julia's erratic behavior.

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.

McGarrett's mom pays him an unexpected visit while the team investigates a polo player's death.

As the team investigates a grisly murder, evidence suggests the killer is about to strike again.

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.

Mac and the team search for a kidnapped prodigy from Mac's former middle school; with only pliers and some wire, Mac attempts to rescue the young genius.

MacGyver and Jack must find Riley after she disappears and hacks into the NSA; Bozer embarks on his first mission; Jack reveals his history with Riley's mother.

MacGyver hunts a U.S. government mole who is leaking classified information to the organization trying to take down the Phoenix Foundation; Sarah comes back to help with the mission; Mac can't tell which side Nikki is on.

While returning from capturing a war criminal, Mac and Jack's helicopter crashes, allowing the prisoner to escape.

Mac and Jack must track down a corrupt FBI agent who has framed a man for murder; everyone on the team is terrified to get a performance review from the tough new boss.

When Matty's goddaughter and her boyfriend are killed in a San Francisco park, Mac and the team investigate the crime and start to suspect that the 1970s Zodiac Killer has returned.

While Mac and Jack are tracking a dangerous fugitive, a family of bounty hunters kidnap him; Bozer and Riley try to hack into Jack's CIA file.

When Mac and the team are blamed for a terrorist bombing, the Phoenix Foundation is forced to disavow them; the team must clear their names without support from back home.

When the BAU team travels to Denver to investigate several murders, Prentiss is forced to evaluate her relationship with Special Agent Andrew Mendoza.

Prentiss and J.J. are faced with important decisions to make about their futures as the BAU travels to Texas to investigate a series of murdered businessmen.

Rossi develops some new theories about Everett Lynch, aka The Chameleon; the team sets out on an epic hunt to capture Lynch.

While hallucinating after he gets a brain injury, Dr. Reid is visited by ghosts from his past; the BAU makes a shocking discovery about Lynch that affects Rossi personally; the team comes together to celebrate Rossi's retirement.

The team closes in on a serial killer (Tim Curry) holding Detective Spicer's daughter hostage.

JJ tries to reunite parents with their missing daughter; the team braces for the loss of one of its own.

When several women are murdered, Rossi revisits a 25-year-old case that causes him to suspect a killer is at work again.

The team searches for a serial killer who is preying on married couples; Hotchner looks to a team member to fill JJ's vacant role.

The team pursues a serial killer targeting families in the Midwest; Morgan receives a visit from Ellie after she runs away from her foster family.

The team searches for a killer who has struck the past three years during Detroit's raucous pre-Halloween celebrations.

When bodies turn up in Indiana cornfields, the team must catch a pack of serial killers targeting exotic dancers.

The team tries to stop a killer from striking again after the body of a kidnapped woman is found in an alley.

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.

Nothing is certain in the case of a flight attendant's brutal murder.

A home invasion turns into something more when the team discovers that the Russian mob is targeting the group.

When Ryan is kidnapped, he is forced to betray Horatio and the team.

A murder case leads Horatio to discover that Ron Saris is alive and seeking revenge on Julia.

The murder of a reality star throws the CSI team into the scandalous world of a television dating show.

A seemingly normal family is targeted in a brutal grenade attack, leaving Horatio and the team to figure out why.

The team investigates when a man is boiled alive; Julia spins out of control; a dark secret is revealed.

Horatio tries to save Yelina; despite Calleigh's protests, Delko gets involved with his dangerous father.

As Eric Delko's life hangs in the balance, Horatio finds himself reminiscing about the formation of the CSI team and how its members first met.

Horatio must submit to a gunman's bizarre request in order to save hostages when the lab is attacked.

Team members investigate when a trio of volleyball players suddenly drops dead on the court; Calleigh's testimony against Delko threatens his future with the CSI unit.

When Miami's most-hated man is murdered, members of the CSI team search for the killer and hidden treasure.

Brennan is suspicious when a Jeffersonian co-worker dies of heart failure; Cam tries to get her newly adopted teenager to stop smoking.

A friend of Booth's, Ken Nakamura, asks for help when his sister goes missing in Washington.

The body of a fraternity brother is discovered inside a rival school's mascot uniform; Booth tries to help his brother find a new job.

Brennan asks Booth to be the father of her child; Stewie Griffin (Seth MacFarlane) offers the couple advice.

When a body is discovered at a popular nightclub, everyone is a suspect.

Angela's psychic, Avalon Harmonia (Cyndi Lauper), alerts Brennan and Booth to the presence of a mass grave beneath a fountain.

Booth and Brennan investigate when a man is murdered for the undisclosed contents of his briefcase; the team looks for alternate funding for Wendell when he loses his scholarship.

Human remains are found next to a railroad; Cam deals with the stress of being a new parent; Booth tries to keep Cam's stepdaughter in line.

When human remains are found at a neighborhood block party, scandals and suburban politics give many people a motive; Booth's son tries to find a girlfriend for his father.

Brennan and Booth investigate what appear to be charred human remains on an electrical fence; Brennan goes on a date with Booth's supervisor; Sweets' girlfriend returns to the Jeffersonian.

The Jeffersonian team investigates when the mutilated remains of a chicken farmer are found near a river; the case prompts Angela to launch an animal-rights campaign.

Booth must be recertified for FBI marksmanship, but he is not the accurate shot he was before having brain surgery; Brennan and Booth investigate the death of a little person who was a wrestler.

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.

A former IIB colleague returns and ends up jeopardizing the team's success.

After a tip about a dance company, the team investigates the abduction of a ballerina.

The BAU team heads to Los Angeles in search of a suspect who kidnaps nannies and the children they care for.

The team tracks a suspect targeting people in Detroit; Blake receives a life-changing proposition from her husband (D.W. Moffett).

The team investigates a series of deaths in Manhattan that seem to be related to ecstasy overdoses; Hotch makes a discovery about his estranged brother.

When the Replicator returns, a member of the BAU team is targeted.

The team tracks an increasingly devolving killer to Arizona; the team suspects Hotch is in the running to be the unit chief.

As the hunt for a ritualistic killer continues, a bizarre familial connection could help the team zero in on the suspect.

The BAU team must determine if the anniversary of the Kennedy assassination is a motivating factor when a sniper strikes Dallas.

The BAU team meets the new section chief (Esai Morales), who shares a long history with J.J.; an unknown subject leaves victims unable to communicate.

As Hotch fights for his life after being stabbed, he has visions of his late wife and his nemesis; when a teen goes missing, suspicions arise about her estranged father.

Ritualistic murders lead the team to believe their suspect may have a fascination with the Salem witch trials; Garcia plans a Day of the Dead celebration.

A series of strangulations leads the team to look for a killer who keeps mementos of his victims; Rossi's favorite bar is in danger of closing.

The team searches for missing teens who are suspects in a series of mass murders in Chicago.

When skeletons are discovered in the backyard of a home in Virginia, family secrets and past racial divisions are brought to light.