The BAU searches for a serial killer who leaves distinctive marks on victims' faces.

The BAU is called to Los Angeles to investigate an LA city bus poisoning resulting in many deaths. The team must work quickly to stop a second attack believed to be on a much larger scale.

In Savannah, Georgia multiple brides-to-be have been found murdered the night before their wedding day. The team quickly realizes they are searching for an unsub suffering from severe rejection.

The team heads to Las Vegas, New Mexico where three employees at a local restaurant were killed during a robbery. The investigation leads to the re-opening of a cold case from six years ago, which is believed to be related to the restaurant homicides.

In Detroit, Michigan the BAU investigates several murder victims found morbidly incorporated into graffiti. They believe the murders to be the work of a notable street artist.

The team must search for a killer in a small Florida town with a large population of sex offenders, presenting an overwhelming suspect pool.

The team heads to Phoenix, Arizona to hunt a serial killer who tortures his victims using sleep deprivation. Hotch, Morgan, and Garcia continue their on going search for the dirty dozen.

The BAU works with the NSA when two undercover DEA agents are murdered and another goes missing; Hotch hopes the team's work with the NSA will bring them closer to finding a ring of hit men.

The BAU search for an UNSUB who is fascinated with disturbing medical experiments.

As Reid narrates to one of the hitmen how they tracked her, the BAU works to get him out of the hitman's gunpoint.

The group tries to track down and arrest a deranged man posing as a taxi driver in Boston. The man beheads his victims and leaves their bodies in very public areas.

The Atlanta field office requests the BAU's assistance in a case with two victims thus far, both stabbed multiple times to death, both victims found bound in different truck stop rest rooms, one outside of Chattanooga and one outside of Birmingham, posed post-mortem, both victims missing their left ear, with the murders probably taking place elsewhere as concluded by the lack of blood at the scenes. The wounds indicate indecisiveness and inexperience in the act of killing, while the posed bodies in highly public locales indicates the exact opposite of experience in the act, leading to the competing theories that there are two people working together, or one person who has long fantasized about what he is doing and is only now being able to act upon those fantasies. One victim is a homeless John Doe, while the other is a well regarded schoolteacher. When a third victim emerges with a slightly different M.O. in that she was killed at the disposal site, the team knows that the victims are targeted and not random, that there is only one unsub who was removed from his family at a young age and is now getting revenge on those associated with the family court and welfare system, but that the unsub is being fed information by someone in the generation above his on who to target. When the team believes they have discovered the identities of both the unsub and his older information provider, the latter who may not know what he's doing, the question becomes whether the older partner will give up the other in the pairing.

The team searches for an unknown subject who abducts children after visually impairing their parents while they sleep. Distracted father-to-be Morgan tries to find out who attacked him.

When an unsub targets the BAU, the team pursues the person who is responsible for the actions.

Former BAU team member and current Interpol Agent Emily Prentiss tracks an international serial killer to American soil and enlists the teams help to track him down. Meanwhile, the team deals with Morgan's departure.

The team go to Sacramento, CA to find an unsub mutilating the faces of his recovering addict victims found in enclosed bodies of water. Even Rossi, who has to choose between spending time with his grandson and work, joins them.

The authorities believed that two Virginia based cases of missing boys, Adam Morrissey and Jimmy Bennett, from two years ago were unrelated, until their bloodied clothes, those in which they were last seen, had just arrived in one intercepted package at Fletcham Correctional Center in Troy, Virginia. The addressee of that package is Antonia Slade, a serial killer of young teens, she who was convicted in part by work of the BAU, most specifically Gideon. A social worker, she ran a fake youth hot-line as a means to lure her victims to her home, where the dead bodies of the young teens were found encased behind her basement drywall. Since, she has never talked about the murders, and has refused all visitors. However, she seems to know about the clothes and the missing boys before the BAU's arrival at the facility to speak to her. They know that she, a narcissist despite not responding to the correspondence from any of her legion of groupies, has no compelling reason to talk to them unless there is something she knows, divulging which would be to her benefit. In speaking to her, the team members find that she is controlling, and any accomplice or associate to her criminal activities would have to be the submissive. Beyond cryptic statements, the one thing she is clear about is that Adam and Jimmy are still alive, but for how long is uncertain. The team discovers that she is indeed corresponding to the outside world through unofficial means, they needing to find how, to whom and what those messages state for them to find a hopefully still alive Adam and Jimmy.

The team works to clear Hotch's name after he's arrested by the DOJ for conspiracy.

Luke Alvez (Adam Rodriguez) and the team track down one of the 13 prisoners that escaped from prison at the end of the previous season.

JJ tells her husband about the abduction of two children.

The BAU welcomes back Emily Prentiss (Paget Brewster) as they are called upon to investigate the disappearance of three women

The BAU team searches for a serial killer along the Appalachian Trail in rural Virginia.

The BAU investigates the case of two murdered families where the oldest siblings are the sole survivors.

When three children disappear while riding their bikes on the same path as a similar unsolved disappearance 30 years ago, the BAU team comes in to investigate.

The BAU opens an investigation when a man arrives in town believing he's the brother of Dr. Tara Lewis.

The team heads to Yakima, Washington when the remains of a dozen people are found along a creek bed.

While Rossi conducts a profiling course on his birthday, he receives a call from his nemesis Tommy Yates, who discloses the location of his latest victim.

The team investigates a series of home invasions in San Diego involving casualties.

Reid has returned from Houston, where he was visiting his mother who is in a new facility on an experimental drug program. He is called back home from the office while the rest of the team heads off on their next case. It isn't until the team is in the air that they learn that Diana is no longer in the Houston facility, but that she is now living with Reid, as the trial drug was not having the intended effect. Reid had received professional advice that his mother should be in a facility both for her and his own good, but it may be news from a more caring rather than clinical voice which may carry more weight with him. Regardless, he makes himself available to the team, who are in the Tampa, Florida area where two individual deaths have occurred, both now considered murders, the two tied together by ink drawings on the inner arms of the victims, the second victim's whose has one more stroke of the pen than the first. The M.E. is able to determine that the markings were made with the same pen. The death of the first victim, a model suburban soccer mom, was initially ruled a suicide from an overdose of sleeping pills, her own prescription. The second victim, a homeless man, died of a heroin overdose, he who was known not to be a drug user, but rather an advocate for the homeless to get those in need into drug rehab programs. As such, they were both killed using the tools of their life, they presupposing that the unsub forced them to kill themselves. With two subsequent victims, the team also gathers more evidence: that the victims post-mortem were taken to outdoor sites with disturbed ground, and the unsub is connected in some way to fire. The identification of the ink markings in relation to the aspect of the disturbed ground may provide the key to finding where the unsub will strike next.

The BAU investigates the case of a killer who dismembered their victim before dumping just the torso.

When a member of the BAU gets in trouble in Mexico, they enlist the help of the International Response Team.

The BAU investigates a series of pedestrian deaths while a teammate's fate remains uncertain.

A series of acid attacks draw the BAU to Philadelphia, while Reid adjusts to a new reality.

A mother comes forward with information to help the BAU in their investigation of an unsub called the Bone Crusher.

The BAU suspects that two unsubs are operating at the same time when victims killed in different ways are found in the same city.

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.

Three victims are found tied to stakes in the 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.

Derek Morgan brings the BAU a lead in the case against serial killer and escaped convict Mr. Scratch.

In the wake of a devastating attack, the BAU works with former International Response Team member Matthew Simmons to save one of their own from escaped serial killer Peter Lewis.

Following the final incident with Scratch, the team has been taking a mandatory break to decompress. In addition, Reid has gone through his reinstatement evaluation, he who has been conditionally reinstated without the possibility of negotiation on that condition. In their time off, there has been a backlog of cases. However, they depart to Naples, Florida on a case of some currency, as a female has just been discovered murdered, her body stuffed into an old suitcase and placed in a public location. She is the second victim, the first as of yet an unidentifiable Jane Doe whose body had decomposed beyond a state of visual identification. By the time the team lands in Naples, a third victim is discovered. Beyond the suitcase in a public locale, the other similarities between the two identified victims is gender, that they were strangled, and that the same old fashioned shade of lipstick had been smeared on their mouth area. The lipstick and the suitcases indicate that there is some vintage aspect to the unsub's psyche, and that a probable stressor is being abandoned by a female, probably the unsub's mother when he was a child. They also discover that both women were in the process of a romantic evening, friends who can attest that they were careful women not prone to reckless dating. JJ surmises that the unsub is able to lure his victims unwittingly using a Florence Nightingale complex, in that they are attracted to some "broken" aspect to his personality. It isn't until the first victim is identified that a tie between all three victims is discovered. By that time, the team believes that the unsub probably has an ultimate victim in mind, who they have to discover before she becomes an actual victim. In the process of the case, Reid will demonstrate, at least in this case, if the evaluation committee was correct in their concerns about him.

The BAU team members head to Detroit, Michigan where two men in two weeks have been discovered dead. Both were married, Caucasian, mildly successful professionals. Both were found in very public places hanging by a meat hook, naked and their private parts cut off pre-mortem. The authorities eventually receive a snuff movie of the second victim, Curtis Wyler, including the entire time it took him to bleed out to death. The team analyzes the video in order to find any clues as to the unsub's whereabouts. Garcia discovers that both men had been systematically withdrawing large sums of money from their bank accounts, small enough not to be questioned by the banks. In questioning the Wyler's wife, the team believes that both men were probably using the money for the services of an escort. What Garcia finds is that it is not an escort service, but rather an online dating site, Blue Siren, where members arrange their own meetings. Both victims had been involved with the same member, a woman with the online handle Dasha, who had recently discontinued her membership. The team is able to locate Dasha, who admits to her involvement with the victims, but does not know why anyone would want to kill them. She is concerned that the unsub may be after her. The unsub is after her, but not in the way that she anticipates.

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

When Garcia experiences anxiety over a case that's personal to her from her past, Morgan visits to lend emotional support.

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

The team heads to Austin, Texas, where two women are abducted and disfigured, only to be located a day later with no recollection of what happened to them. A third emerges shortly after the team's arrival in Austin.

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 with 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 brutal casualties are reported in Central Park.

The BAU is called to investigate a series of D.C. homicides where cryptic messages are found inside the mouths of each victim.

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

The FBI's assistant director of national security, Linda Barnes, joins the BAU as they investigate a quadruple homicide of a group of roommates in St. Louis.

Away from the watchful eye of the FBI's assistant director of national security, Linda Barnes, the BAU meets in secret to investigate an UnSub who appears to be kidnapping and photographing young women.

The BAU is called to Oklahoma to investigate a murderous clown terrorizing the sleepy town of Guymon.

The BAU travels to Chicago to investigate an unsub who leaves red roses on each victim. Also, Rossi gets an unexpected visit from his ex-wife, Krystall Richards.

The BAU takes charge of a hostage situation at a law firm in D.C., where Matt Simmons' wife, Kristy, works.

The BAU is called to investigate a series of deaths in Virginia suspected by the Center for Disease Control to be caused by bio-terrorism; Garcia visits her stepbrother to take care of a family issue.

The BAU is called to Taos, N.M. to investigate an UnSub who is targeting his victims' temporal lobes.

When Reid discovers former FBI Special Agent Owen Quinn locked inside a storage unit, the BAU questions the credibility of Quinn's bizarre accounts of searching for an UnSub that he named "The Strangler".

Penelope is the victim of an abduction.

When the mummified remains of numerous victims are found in the walls of an elderly couple's remote South Carolina home, Rossi, J.J., and Simmons are dispatched to track down a trail of clues that date back over 20 years. The hunt becomes urgent after BAU learns the killer has a specific ritual of when to strike, and like clockwork another person goes missing. Also, Rossi reconnects with his ex-wife, Krystall.

The BAU must determine what connects six people that each received a mysterious package in order to identify the Unsub. Also, Simmons and his wife Kristy must deal with their son, who got suspended from school.

Soon after the BAU steps in to help local law enforcement isolate a prime suspect for a ritualistic murder in Tallahassee, Fla., a second person who is related to the first victim is killed under similar circumstances. Also, Prentiss is concerned about Garcia's behavior in the aftermath of her abduction and has an idea of how to help with the healing process.

The BAU investigates a spooky local ghost story of the "Tall Man" and the clues it provides when two people go missing in the woods of East Allegheny's Dead Man's Conservatory, and a third mysteriously surfaces the following day with limited details as to what happened to her friends. To assist with the case, JJ reluctantly returns to her hometown, triggering emotional flashbacks to age 11 and her older sister's tragic death.

The BAU heads to Bethesda, Md., to investigate four murders in the span of three days along the eastern seaboard. The crimes become personal for Alvez, when the team discovers there are ties to his time spent five years ago working alongside the DEA and the Mexican police force in pursuit of the most notorious hitman in Mexico. Also, Alvez and his girlfriend, Lisa, decide to move in together.

It's a race against the clock for the BAU 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 Unsubs and what's motivating them.

The BAU investigates a double homicide and kidnapping in New Hampshire. Also, 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 plans a first date with Mendoza but the evening is cut short. Prentiss faces her past when the team investigates murders of businessmen who have had their hearts taken.

The BAU team heads to Portland, Ore., to investigate a chilling abduction that may be linked to a local couple killed in their home a week earlier.

Prentiss and the BAU team fly to Iowa to investigate the disappearance of three 10-year-old children who appear to have been abducted from their homes in the middle of the night, with surveillance video from a neighborhood park as their only lead to finding the children's whereabouts.

Rossi questions his actions in the aftermath of a near-death struggle with a serial killer who appears to have outsmarted the BAU.

The BAU leads the investigation into a string of murders taking place in supposedly haunted houses in Lewiston, Maine.

Wedding bells are ringing as Rossi prepares to marry Krystall. But first, the BAU team travels to Los Angeles to investigate a series of fatal shootings in broad daylight following car accidents.

The team search for multiple serial killers. One who removes women's faces and another who cuts up men's torsos. J.J. and Spencer are still reeling after her admission. J.J.'s life is put in danger.

JJ is in the hospital clinging to life having been seriously wounded in Everett Lynch and his daughter Grace Lynch's successful escape from custody. Besides Will, Reid is standing vigil at the hospital, he who is angry at himself for not realizing sooner that JJ was in trouble. If JJ doesn't make it, Reid will not only lose arguably his best friend, but he and she will not have been able to clear the air about the strain that has existed between the two of them since their previous case. Reid is also torn in two different directions emotionally as he is called by the facility where he recently moved his mother, they wanting him to come right away. With the Lynches, the team knows they they have disrupted Everett's plans - he a highly organized man - and thus Everett and Grace will be working on the fly. The team believes they have to find any connection that either Everett and/or Grace would have in the DC area for that support they need, including financial, to go off the grid. If Prentiss is able to speak to JJ about the shooting, they may get another piece to what is happening with Everett and Grace. Also working for them is the fact that they still have Roberta in custody, who, despite being a criminal in her own right, would probably want to protect Grace at all cost, perhaps even at Everett's expense.

The BAU investigates seemingly random fatal explosions throughout Kentucky and Tennessee.

The members of the BAU enjoy a Saturday off in vastly different ways. While Rossi and Prentiss help Simmons assemble a new crib, Garcia leads a hacking competition, and Dr. Reid strikes up a conversation with a woman named Maxine

Following a series of fatal shootings, the BAU team travels to Des Plaines, Ill to investigate what appears to be a copycat serial killer. There efforts are thrown off track when members of the BAU are targeted.

After a father and daughter get kidnapped, a former foe of the BAU returns with very specific demands for Dr. Reid that give a whole new meaning to the phrase "wheels up".

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

Prentiss and J.J. decide about their future as the BAU goes to Beaumont, Texas, to investigate a series of killed businessmen.

It has been a year since Rossi nearly died at the hands of Everett Lynch, a.k.a. "The Chameleon," and he has developed some new theories, with inspiration from his former partner, Jason Gideon. The BAU team sets out on an epic hunt to capture Lynch.

Series Finale. Following an explosive face-to-face encounter with Everett Lynch, Dr. Reid suffers from a brain injury and, while experiencing hallucinations, is visited by ghosts from his past. Also, the BAU makes a shocking discovery about Lynch that affects Rossi personally, and the entire BAU team comes together to celebrate Rossi's retirement.

When a family annihilator abducts a teen girl, the BAU works the case on either side of the country to save her. But an unlikely connection to a mysterious kit leads to a bigger investigation and at the center of it is Penelope Garcia.

Team hunts an UnSub who severs spinal cords, and uncover a clue from their last case pointing to a serial killer network. To figure out how big this network is, Rossi must convince a reluctant Garcia to return to the BAU.

At the heart of the serial network is Elias Voit. Dangerous psychopath. Manipulative narcissist. Loving father and husband. The team must find all of his kill kits, but one is missing, and the path leads to a bomb in the capitol.

The BAU hunts for the next connection to the serial killer network when they pursue a home invasion team. Alvez and Garcia convince Tyler Green to submit to a cognitive interview to unlock his memories of Sicarius.

A surprising connection forces Dep. Dir. Bailey to ask the BAU to take a case involving young DC socialites bitten by a sadistic UnSub. When the case turns political, the BAU finds themselves in the crosshairs of a high-powered senator.

The aftermath of the explosion threatens to end the Sicarius case unless the BAU can justify a reason to keep it open. The hunt takes them to a death row inmate - but is he a killer or another one of Sicarius' victims?

With the fate of the Sicarius investigation hanging in the balance, the BAU takes a case in West Virginia, where an UnSub practices his own twisted form of Old Testament vengeance.

Voit's internal struggles with himself lead him to a desperate kidnapping. But Rossi's obsession brings the BAU closer to the truth than they've ever been.

Rossi will go to any lengths to prove that Elias Voit is Sicarius; Voit turns Rossi into his own worst enemy, putting his future at the BAU in jeopardy.

With Rossi in Voit's clutches, he grapples with the limits of his technical know-how and mental strength. As the BAU tightens their grip on Voit, he reveals just how far he's willing to take his deadly crusade.

A professor from Lewis' past tips off the BAU to an alarming number of overdose deaths of patients who just completed rehab.

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

The BAU is called to Taos, N.M. to investigate an UnSub who is targeting his victims' temporal lobes.

The BAU opens an investigation when a man arrives in town believing he's the brother of Dr. Tara Lewis.

The team must search for a killer in a small Florida town with a large population of sex offenders, presenting an overwhelming suspect pool.

Three victims are found tied to stakes in the Arizona desert.

In Detroit, Michigan the BAU investigates several murder victims found morbidly incorporated into graffiti. They believe the murders to be the work of a notable street artist.

The Atlanta field office requests the BAU's assistance in a case with two victims thus far, both stabbed multiple times to death, both victims found bound in different truck stop rest rooms, one outside of Chattanooga and one outside of Birmingham, posed post-mortem, both victims missing their left ear, with the murders probably taking place elsewhere as concluded by the lack of blood at the scenes. The wounds indicate indecisiveness and inexperience in the act of killing, while the posed bodies in highly public locales indicates the exact opposite of experience in the act, leading to the competing theories that there are two people working together, or one person who has long fantasized about what he is doing and is only now being able to act upon those fantasies. One victim is a homeless John Doe, while the other is a well regarded schoolteacher. When a third victim emerges with a slightly different M.O. in that she was killed at the disposal site, the team knows that the victims are targeted and not random, that there is only one unsub who was removed from his family at a young age and is now getting revenge on those associated with the family court and welfare system, but that the unsub is being fed information by someone in the generation above his on who to target. When the team believes they have discovered the identities of both the unsub and his older information provider, the latter who may not know what he's doing, the question becomes whether the older partner will give up the other in the pairing.

Luke Alvez (Adam Rodriguez) and the team track down one of the 13 prisoners that escaped from prison at the end of the previous season.

The aftermath of the explosion threatens to end the Sicarius case unless the BAU can justify a reason to keep it open. The hunt takes them to a death row inmate - but is he a killer or another one of Sicarius' victims?