The team are called to an Arizona college when an arsonist who operates in a very unusual way kills a student.

A bomber in Palm Beach forces Gideon to confront an old adversary.

A serial rapist-killer active in San Diego targeting middle class women glues his victims eyes open.

One of a lawyer's identical twin daughters is kidnapped. The kidnapper contacts him and demands ransom money. The team's investigation, however, reveals that he doesn't really want the money, but both girls.

The team chases a sniper in Des Plaines, Illinois who for some reason only wounds his victims.

The team attempts to catch a killer who preys on families while they are supposed to be on vacation.

The disappearance of an undercover officer in relation to a triple murder puts the BAU on the hunt of a possible serial killer who's turned it into a profession.

A paranoid schizophrenic takes other passengers on a train hostage, including Elle.

The apparent death by Satanic ritual brings the BAU to a small town, and the profiling morphs into a search when it's learned that a teenage girl is missing.

The BAU team must profile a delusional killer in rural Tennessee, and a family member protecting him puts a child at risk.

The team must determine whether an abducted girl is the pawn in a bitter divorce, or something more sinister has happened.

The apparent spiking of citizens of a town in New Jersey, puts the BAU on the trail of a poisoner who may not be done.

The team of investigators interview husband and wife serial killers with their execution date set for two days time.

When a serial killer reappears, the team works with a retired BAU agent who just published a book about the perpetrator.

The massacre of students using Native American rituals leads the team to consult the reservation policeman, who is also an activist.

The team travels to Manhattan to work with the NYPD in tracking and apprehending a serial killer who is intent on dispensing his own style of vigilante justice.

In town to conduct a seminar, Gideon and Reid become involved in a stalker case that has escalated to murder.

The BAU is requested to assist on a case in Mexico to determine if there is a serial killer in the town of a police captain who attended one of Gideon's seminars.

Team members track a known "chameleon" serial killer across the southeastern U.S. trying to stop him before he kills again.

The BAU team investigates a CIA counter-terrorism unit to identify a traitor who had a fellow agent murdered and who is trying to find and kill the unit's informant, a Saudi woman with two children who are in hiding.

Team members become pawns of a psychopathic killer.

Elle's fate is unknown, and the unsub continues dropping clues as the team scrambles to identify him before another tragedy occurs.

The case of a missing boy placed up for auction online by a child pornographer draws the BAU team to work together with a former profiler who now works for the Innocent Images Unit to find the boy before the auction ends.

The BAU team investigates a series of murders in Florida, suspecting a partnership between two deviant persons with complementary personalities due to the nature of torture videos taken of the victims sent to the victims' parents.

The team flies to Los Angeles to pursue a bank robber who is quickly disintegrating into an enraged sexually-motivated spree killer.

As the team assists in finding a rapist in Ohio, Elle's actions may compromise her career.

While the team profiles a killer in a small town, Hotch must stay and deal with Elle who is beginning to unravel.

Three soccer stars are abducted and the unsub plays games while the B.A.U. desperately tries to narrow down the suspects.

When a bomber targets Seattle, the BAU has to determine if it's a protest group or an individual with a much different agenda.

Two serial killers send the BAU to St. Louis, and a new team member reports for duty.

When a bomb is found at what was thought to be a drug lab the BAU is brought in, and while Hotch conducts a state-side investigation Gideon matches wits with a prisoner at Guantánamo Bay.

A young man seeks out Reid for help regarding his fantasies of killing prostitutes, just as a serial killer starts brutalizing prostitutes near the capitol.

Derek is arrested as a serial killer, and the team must delve into his secrets in order to free him.

Gideon matches wits against the most prolific serial killer ever found, and the results are surprising.

The slaughter of a wealthy couple just after a Super Bowl party puts the BAU on the trail of two killers.

Reid has been kidnapped, and the BAU's only things to profile are a house, a computer, and the live feed the kidnapper is sending to them.

The death of four African-American girls in a a predominately white community brings the BAU in to try to solve the case before racial tensions explode into violence.

The seemingly random killings in a Houston ward bring the BAU down for the profile, but finding the pattern proves difficult.

The BAU travels to New Orleans' French Quarter where a Jack the Ripper type serial killer is on the loose.

The team tries to identify a serial arsonist who has escalated to murder.

The BAU finds themselves sparring with the Russian Mob, but even more puzzling is the behavior of one of the victims.

The team is called to investigate when bodies of missing people are discovered in the Idaho wilderness.

A detective presents himself at the BAU, asking for help because the homeless in his area have begun to disappear.

Frank is back on the hunt, and the team must protect Gideon while he profiles Frank again. Elsewhere, the team faces a review with some surprising results.

The team tries to identify a serial killer based on a shaky profile with devastating consequences.

With Gideon still missing, Hotchner puts in for a transfer and Prentiss tenders her resignation, but both are drawn back to work by a serial killer targeting women in a particularly heartless fashion.

The unit tracks a man working through his fears by working them out on others.

The BAU travels to Denver, Colorado, where they investigate a series of home invasions that end in the murders of entire families. However, the case takes a turn when they begin to suspect that the killers were once-abused children.

The unit works against the clock when a little girl disappears in a mall, believing a serial killer has struck a second time and the first girl died within an hour of abduction.

The team gains a new, familiar member and some growing pains while trying to find the latest victim of a killer who puts up wanted posters of his victims before he abducts them.

The unit has to deal with the militia when they're called to rural Montana to track a killer who's obsessed with his mentor.

A killer is abducting women and forcing them to eat fingers before killing them, Rossi plays with Morgan's head, and Garcia meets a man at the local coffee shop.

More is learned about Garcia while the team tries to find the persistent unsub threatening her.

The team heads to LA to investigate a number of brutal killings which turn out to be related to the creator of a graphic novel, Jonny McHale.

The team travels to Fredericksburg, Virginia, where women are being abducted, burned and mutilated. Soon it turns out that similar killings happened in the 1980s.

Two teenage girls go missing, one of which is soon found dead and freshly buried. The team soon suspects that the killings are related to the witness protection program.

The auction of the contents of a self-storage facility in Philadelphia reveal a possible serial killer in the making.

Rossi determines that the case that haunts him has gone unsolved too long on its 20th anniversary, and the team horns in on his investigation despite his displeasure. Elsewhere, Reid and Hotchner interview a manipulative death-row convict.

An unusually high suicide rate in Pittsburgh appears to be the work of an Angel of Death.

When a spree killing begins in a small Texas town, Reid's identification with the killer may endanger the girl with him, and cause Reid to put his own life in jeopardy.

The team travels to Miami in pursuit of a serial killer whose conflicted sexual identity fuels his crimes.

As a favor to the D.A. in Boston, Hotchner and Rossi profile a woman who murdered her husband, though the D.A. may not like their findings. Back at the office, J.J.'s personalization of a stalker case baffles the rest of the team.

A suspected serial killer who's been in a coma since 2004 due to an accident when he was arrested wakes up 4 years later, with no memory of his past, not even his name. While he is tried in court, in which Hotch is testifying against him, the rest of the team investigates his past further.

People who apparently have nothing in common are being shot randomly in New York City and the team must determine whether it is the work of a single shooter or a team.

As the city is on high alert, the team begins to believe that they have made a mistake with the profile and that everything the terrorists have done so far may in fact just have been diversion for something even bigger.

On the anniversary of a serial killer's execution, a murder spree which appears to be connected to him begins and the team must try and understand his mind in order to stop it.

Reid and Prentiss, having gone undercover into an underground cult to investigate child abuse, get trapped inside the compound when a federal raid on it goes bad.

A serial killer targeting couples stages their bodies in a way to make their deaths look like car accidents.

A man is jumping trains along Highway 99, brutally killing couples in their homes whenever he stops.

A child abduction case in Las Vegas causes Reid to have strange nightmares which appear to be connected to an event in his past.

Driven by his nightmares, Reid stays behind in Las Vegas to find his father in order to find out the truth about Riley Jenkins' murder.

A serial killer turns himself in and challenges the team to find five people he has hidden somewhere before they die.

A greatly sadistic serial killer who disembowels women and forces them to clean it up before killing them proves difficult to catch thanks to his social charm and simple, yet clever, disguises.

Morgan, an ex-cop, takes it personally when a serial killer targets police officers in Phoenix, Arizona.

A serial killer known as the Road Warrior is gunning down blonde women on roads in Orange County, California and the BAU suspect that the victims are surrogates and that it's only a matter of time before he kills the real one.

The team suspects that a member of an affluent community is responsible for the disappearance of a young woman.

A family consisting of two parents and their son break into a home, kill the parents and kidnap their daughter. As the investigation proceeds, the BAU team begin to suspect that what they're dealing with is bigger than they thought.

A serial killer in the Olympia, Washington area has abducted four blonde, twenty-something women. When the third victim is found embalmed, the BAU are called in and suspect that the embalming is a way for him to spend more time with them.

A copycat serial killer is recreating murder techniques used by famous killers from the past.

A high priced call girl that is killing her clients must be found and stopped.

Prentiss learns from an old friend, John Cooley, that their mutual friend, Matthew Benton, just died from a heart attack. Prentiss had not seen either man in several years, both for different reasons. John also mentions that Matthew thought he was going to be killed just like "Tommy V." In searching, Garcia does find someone matching that name in the area who recently died from dehydration. There are similarities between the two deaths but no medical rationale for tying the two together as murders. A third person in the area then dies in a similar way but again no medical indication of an unnatural death or rationale tying the death to the first two. However, Prentiss and Rossi, in particular within the team, are certain the three deaths are related and that they are indeed murders. They have to tread lightly and carefully since the families of the deceased refuse to speak to the FBI - especially Matthew's family who know, and do not like, Prentiss - and since there is no official case as the police have not sanctioned one. The investigation gets more complicated for the team when they find who they believe is the murderer.

After being inactive for 10 years, Hotch's first BAU case, an elusive serial killer known as the Reaper, starts killing again.

When the kill count of a mass-murdering arsonist active in a small town reaches 31, the BAU are called in.

Male college students on spring break are being raped and murdered, presumably by a man and a woman working together. The BAU are called in and suspect a shy hotel cleaner and a receptionist.

An AMBER alert is activated for a young boy in Cherry Hill, New Jersey and the BAU suspect it to be the work of a pedophile who has abducted and killed two other boys.

The team tracks down a highly obsessive-compulsive killer who targets blonde women and leaves messages to the police asking them to stop him.

A serial killer in Bend, Oregon is deliberately killing people by running them over with his car.

The BAU co-work with the U.S. Army to find the perpetrator behind an anthrax attack on a park in Annapolis, Maryland.

The team head to Canada to investigate the disappearances of a number of homeless people, drug users and sex workers and uncover something horrific.

A man is threatening to kill a doctor's son and is killing a man a day until he is successful. Meanwhile, Hotch's absence is noticed by Prentiss.

Darrin Call, a psychotic, suffers a breakdown in a pharmacy in Kentucky and stabs 3 people to death before running off and the BAU are called in to catch him.

A hitman targeting people in some way guilty of children-related crimes brings the BAU to Rossi's home town.

The BAU go after a pack of killers who mercilessly beat their victims to death simply for the thrill of violence.

The team hunts a suspect who impregnates young women and has them give birth before murdering them.

The BAU team tracks a serial killer who takes the eyes of his victims.

The BAU team follows a trail of murders that seems to align with the tour schedule of a rock star.

While tracking a family annihilator, the BAU must seek advice from "The Fox," one of the most horrific killers from the team's past who has an ominous message for Agent Hotchner.

The BAU team races to help Hotchner find The Reaper and save his family before it's too late.

While Agent Hotchner takes a leave of absence from the BAU, the team must regroup to solve a home invasion case.

The BAU must profile a criminal's past in order to catch him after he escapes from custody and begins a killing spree.

An unusual personal obsession is at the center of a BAU abduction case. Meanwhile, Hotch struggles with his return to work.

A rash of startling teen suicides in a small Wyoming town is the focus of a BAU investigation.

The BAU follows the mental decline of a con artist whose schemes have become so complicated that he begins to eliminate the people involved in them.

A serial killer who targets random victims in highly visible places to create a sense of public fear is the subject of a BAU investigation.

The BAU profiles a child abductor who may have been keeping children for more than eight years.

The relatively new Highway Serial Killer Database reveals an interstate serial killer who abducts then strangles women without sexually assaulting them.

The BAU team travels to San Francisco to investigate the murders of several homeless men and teams up with a separate group of BAU operatives who are working another case they think is connected.

The BAU team heads to Texas to track a serial killer targeting illegal immigrants attempting to make safe passage into the U.S..

The BAU team must profile a serial killer covered in tattoos, who commits suicide but leaves clues to the whereabouts of his last victim.

The team, including Garcia, go to the small town of Franklin, Alaska, to catch a rapidly escalating serial killer before the locals take justice into their own hands.

A serial killer in Boise, Idaho, is revealed to have been posting his murders on the Internet, accumulating quite a collection of fans in the process.

The BAU is called to California when a sadistic serial killer appears and begins killing people in the dark during the rolling blackouts.

As The Prince of Darkness continues his murderous rampage across California, the BAU go after him to save Detective Spicer's daughter from him.

While trying to get two suspects to reveal what they've done with a missing woman, the BAU brace themselves for the loss of one of their own.

While Prentiss has gone missing to track down Ian Doyle and finish him, her team attempts to track down her and digs deeper into her past.

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

The BAU team is at a crossroads as they are questioned by a Senate Committee for their retaliatory actions in the wake of Prentiss' loss, but an unexpected familiar face could help them win their case and keep the team together.

The BAU team searches rural Oklahoma when women are found murdered after being robbed of one of their five senses. Also, JJ and Prentiss get the cold shoulder from Reid as he deals with their deception about Prentiss' presumed death.

The BAU team investigates a mass murder at an Internet security company in Charlottesville, Va., but clues reveal it is not a typical serial killer at work. Also, Prentiss must complete recertification training under Morgan's watchful eye.

The team travel to Boise,Idaho where a serial killer is murdering the survivors of a high school massacre that took place exactly ten years earlier.

The BAU team investigates the abductions of young children with troubled mothers in St. Louis. Also, Rossi reconnects with his first wife who has shocking news for him.

The BAU search California's Angeles National Forest after a number of bodies mysteriously turn up in the mountain lakes there. Also, Rossi struggles with an agonizing decision regarding his ex-wife.

When a series of tornadoes hits Kansas, the BAU is called in to investigate bodies of young boys that turn up in the aftermath of the storms. Also, work pressures cause tension on JJ's home front.

Penelope calls in the BAU when a grieving member of an emotional support group that she heads abruptly vanishes at the end of a meeting.

The BAU team looks into the real reasons behind an apparent mass suicide of a small group of youths at a military academy. Also, Hotch and Morgan butt heads when a team member could be in jeopardy.

The team investigates a string of brutal bludgeonings in Philadelphia, leading to the city's boxing scene in search of the killer. Hotch makes a connection with an attractive runner as they both train for a triathlon.

The BAU is called to San Francisco to investigate a possible Zodiac Killer copycat. Meanwhile, Reid wonders what he's done in his life as he reaches 30.

The BAU team searches for a serial rapist in Houston known as "The Piano Man" who has resurfaced and is assaulting his previous victims. Also, Prentiss tries to come to terms with her trauma from last year and with rejoining the team.

A chronic gambler stumbles upon a sure-fire method for manufacturing luck - murder and the number eight.

The BAU team hit choppy waters on the beaches of Southern California when they discover a series of bodies hidden in lifeguard towers along the coast.

The BAU team investigates a series of brutal home invasions and murders in California's Inland Empire that appear to be gang-related, but their investigation may uncover a more sinister motivation.

The BAU heads to Atlanta, where stabbings of prostitutes lead the team to suspect more than one unsub.

When married couples fostering young children end up being killed in Seattle, the BAU team looks for an unsub with a maternal-yet-murderous instinct. Also, Garcia fears a possible proposition from Kevin.

A boy named Angel is found wandering in the desert, and when another boy turns up missing, the BAU searches for the kidnapper.

When an Oregon woman is found dead in an abandoned asylum, the BAU realizes that the victim is part of a series of gothic, ritualistic murders and the suspect might be a Satanist.

The BAU searches for Morgan's cousin in Chicago when his sister Desiree is injured in a car accident after chasing a car presumed to be carrying his cousin.

New deaths upon the heals of a serial killer's execution initially seem intent upon spreading doubt that the true killer met the bullets of the firing squad.

The BAU joins Agent Rossi as university guest lecturers, scheduled on the same day as Rossi's long-term annual commitment to visit an imprisoned serial killer.

In this first part of a two-part season finale, the BAU encounters a gang of bank-robbing serial killers in the nation's capital. As the team tries to negotiate the situation unfolding inside a bank, one of the team is taken hostage.

In part two of the season finale, the BAU races to understand the ultimate goal and core dynamic of the remaining Face Cards and their design in keeping Will captive and alive.

The team tracks an escaped inmate who sews his victims mouths shut.

The team suspects a pair of killers working together after discovering two seemingly unrelated bodies.

The team races to find a connection between two families, one murdered and the other abducted.

The team pursues an unsub who surgically performs needless amputations.

The BAU is asked to investigate when 4 unconnected men go missing without trace. When the body of one victim is found the evidence just adds to the mystery.

The team travels to Miami to track a killer who murders hookers in a style similar to animal slayings.

The team investigates the burned bodies of several homeless people near the Santa Monica Pier in California.

The team searches for a missing school bus filled with students in Washington, DC.

When a follower of a well-known motivational speaker is murdered, the team suspects the speaker himself.

Deaths of joint-dislocated men with dyed black hair draw the attention of the BAU.

The BAU heads south to investigate a fast-moving UnSub whose signature matches that of a serial killer from 30 years ago. Also, the team learns that someone is tracking their cases and replicating crimes the BAU has solved.

When Reid discovers that his girlfriend has been kidnapped by her stalker, he and the BAU team band together to find her before it's too late.

While Reid copes with a loss in his personal life, the rest of the BAU travels to San Francisco to investigate blood-drained victims discovered in the Mission District.

When the daughters of Bruce Morrison, a writer whose wife mysteriously vanished a year ago, go missing on the anniversary of their mother's disappearance, the BAU is brought in to study Morrison as a possible suspect.

The BAU heads to Austin to investigate victims found wearing watches set inaccurately, a clue which may connect the crimes.

When victims are found in Philadelphia in a similar style to victims of The Replicator, the stalker who has been tracking the BAU's every move, the team thinks this could be the break they need to try and apprehend him.

The BAU investigates victims who were documenting their personal lives and inner desires on blog posts and social media. Also, Kevin gets jealous when he learns Garcia may have a new love interest.

The BAU goes to Morgan's old neighbourhood in urban Chicago in search of an UnSub targeting middle-aged men, and a clue leads Morgan to believe that they are after someone connected to the man who molested him as a child.

When a time capsule in a small Colorado town is opened 25 years later and contains a gruesome discovery, the BAU investigates that crime and a possible link to the death of a local police officer.

The BAU travel to Rapid City after two male victims are discovered murdered in a ritualistic manner. Also, Reid continues to grieve over Maeve's death.

The BAU travels to Los Angeles looking for an UnSub who is kidnapping nannies and the children they care for on the same day each year.

The BAU heads to Detroit when couples are murdered and put in their cars. Meanwhile, Blake's husband shares news with her.

As The Replicator hones in on one of the BAU, Hotch gets a call from his estranged brother when party people in New York begin "boiling" from the inside out.

The team searches for Strauss and The Replicator and try to figure out what he wants.

The team travels to Glendale, Arizona to search for an increasingly devolving killer.

The team return to Arizona to restart the search for Wallace.

On a lunch hour in crowded Archer Plaza in Dallas, Texas, a sniper, firing twelve shots, manages to kill six people. The BAU has to figure out if it is a random attack, a targeted attack, a terrorist attack - homegrown or foreign - or even something related to the upcoming fiftieth anniversary of the shooting death of John F. Kennedy. The six unrelated victims were killed in different parts of the plaza, the remaining six bullets splattered elsewhere throughout the plaza, leading to the team initially believing that it was a random attack by someone who was a bad shooter. But the nature of the six killed leads them ultimately to believe that the sniper was indeed an excellent shot, with the six non-fatal bullets being red herrings. They have to look at the backgrounds of the six dead to see who was the intended target or targets. Reid is able to narrow the target list to three, and most likely no more than two, the remaining victims being collateral damage. When a second sniper shooting occurs at a gas station leaving three more dead, the theory that it was a targeted hit is strengthened based on the location of the shooter in relation to the station itself. They have to find a connection between whoever the target(s) in the first shooting to whoever the target(s) in the second shooting to at least find the unsub's motivation. Even if they are able to find the connection, discovering the identity of the actual sniper may be a little more difficult.

The team searches for an Unsub who lobotomised his victim.

The BAU race a father who kidnapped his daughter to the border while Hotch has visions while fighting for his life in surgery.

The BAU are called to Utah to investigate the murder of a woman who died by being buried under stones. All while Penelope plans a Day of the Dead party.

Though Rossi is sad because his favorite bar is closing, the team goes to Boston to solve a series of strangulations.

When teenagers who were reported missing are suspected of a series of mass murders in Chicago, the BAU investigates their whereabouts to find a motive for the crimes. Also, Morgan has conflicting feelings when his girlfriend takes her job at a hospital as seriously as he takes his.

While fixing a burst water main, a city works crew digs up the back yard of the home of the Johnsons - father Charles, mother Tina, and their middle aged son Lyle - upon Tina's approval. The Johnsons have lived at the house for thirty-five years. The crew finds the skeletons of two human bodies buried in the yard. The BAU takes the three members of the Johnson family in for questioning, who they believe know something about the skeletons, primarily because Lyle ran when he saw the authorities at the house. While Hotch, JJ, Morgan, Rossi and Cruz question the Johnsons individually, Lyle initially comes across as the most guilty by his animosity, however the team eventually believes his attitude is more a facade hiding other issues. Charles also demonstrates a more reserved form of animosity, he being a history buff who continually implies how he and his family, as being black, have been persecuted, this situation being no different. The identification of the two bodies and of the others which are eventually found in the yard, in addition to what Reid and Blake are able to find in the Johnson house may piece the puzzle together. Meanwhile, JJ wants to divulge to the team the fact that she and Cruz have been on special assignment, against Cruz's wants.

The BAU heads to St. Louis, Missouri where ten year old Andrew Taffert has gone missing. The reason it is a BAU case is that the Tafferts - father Malcolm Taffert and mother Lida Taffert - had been receiving prank calls from someone with a childlike voice stating "I'm gonna get you", and that blood was splattered on their front door after Andy had gone missing. Reid notices that this case is much like a fifteen year old cold case that the BAU worked on where the parents in that situation received such prank calls prior to their son being abducted and eventually found dead. The father in that case, Richard Clayvin, was always considered a suspect. As such, Malcolm is initially considered a prime suspect, especially considering his over controlling temperament. The similarity between the two cases extends to the post-abduction prank calls with the voice changing its statement to, "Did you see what I did?". But as the investigation progresses, which includes re-interviewing Richard Clayvin, the team may have to find other similarities before they can identify the unsub.

When the BAU is called to Kansas City to investigate a series of murders, a tense reunion ensues between Blake and her father, a retired police captain, and her brother, a detective, who must work together to help solve the crime.

When a murder investigation opens in San Jose, Garcia is forced to delve into her past as a hacker and reconnect with her former boyfriend to help the BAU solve the case.

While the BAU looks for a vigilante killer on the loose in Cleveland, Rossi is concerned when his former Marine sergeant goes missing and heads to Los Angeles to find him. Also, the secret JJ has been keeping from the team may be catching up with her.

The BAU call Emily Prentiss for help to find JJ, who has been kidnapped. The truth about JJ and Cruz's past is revealed.

When the BAU investigates several murders in the Pittsburgh area, the team searches for a pair of UnSubs working as a team. Also, Garcia and Morgan share their Valentine's Day plans for their respective significant others.

When a 4-year-old girl goes missing while staying with a relative in Mississippi, the BAU uncovers some startling truths as the team races to find the child and bring her to safety.

When mysteriously drowned bodies are discovered in the Las Vegas desert, the BAU tries to figure out the true cause and motive for the murders.

The BAU travels to Milwaukee when multiple murder victims are found in shallow graves, with no apparent cause of death.

As the BAU wraps up an investigation into unusual stabbings in upstate New York, Morgan's visit with a survivor could uncover more questions left for the team to answer.

When the bodies of two murder victims are found in a backwoods community in West Virginia, the BAU uncovers a long-simmering feud between two families and must investigate which one of them could be responsible for the deaths.

When 3 unrelated people, of different ages and gender, are kidnapped the BAU races to find the connection and find them before the Unsub kills them.

The BAU must track down a killer who sends their victims a warning before poisoning them with arsenic, without ever seeming to come in contact with them.

The BAU is called to Texas to consult on the murders of victims with links to prostitution.

When Reid is in serious condition after the shootout with the Preacher, the BAU begins to investigate the Sheriff's Deputies.

The team investigates a serial murder case in Bakersfield, California.

The team heads to Seattle to hunt for a murderer whose MO appears to change at random.

A terrorist hacks a passenger's tablet and uses it to take control of the auto pilot of a plane in order to crash it.

Atlanta PD has invited the BAU in for an equivocal death investigation, that of investigative journalist Albert Stillman, who died being run over late one evening as he wandered into highway traffic. An eyewitness who tried to help Stillman just before he was run over states that he was waving his arms in the air yelling, "get them off me", this depiction which goes against Stillman's history of no mental illness. Reluctantly, Stillman's editor, John Carlson, discloses that Stillman was using heroin as medication for a back problem. Stillman was scheduled to meet with a source on a story concerning vaccinations when he vanished for three days just before he died. Garcia learns that another person associated with the case is a Dr. William Suri, a research scientist of entomology, who is later found dead, shot to death. Upon investigation, the team discovers that both Stillman and Suri were abducted - meaning that they are dealing with a serial killer - and had minute bite and deep self-inflicted scratch marks. They thus come to the conclusion that the unsub has delusional parasitosis - the belief that he is infested with bugs - and is looking for people to support his delusion by making them feel what he feels. When they don't support the delusion, he kills them. Based on that theory, the team believes his next victim will be someone in that vein, someone who may have a similar delusion. Locating such people may be easier than getting them to cooperate in the investigation, even if there is the threat of what happened to Stillman and Suri happening to them.

On October 30, 2014, a frightened eleven year old Joshua Parker is found at a Halloween fair in San Diego. He went missing on Halloween day the previous year. His case mimics that of Tommy Wilcox, who went missing on Halloween 2012 in Los Angeles, only to be found on Venice Beach October 30, 2013, alive but he who eventually died of malnutrition a few hours later. Joshua, however, is expected to live. Both boys had atrophied muscles, and had splinters and puncture wounds, although Joshua seems to have been fed somewhat properly. Both boys were also considered troubled, Joshua who was never listed officially as missing since he was a chronic runaway. The problem for the BAU is that Tommy's captor, Rodney Tanner, who confessed to the crime, is currently incarcerated, meaning that he either had a partner, there is a copycat loose, or that his confession is a lie. They have to figure out this issue before another troubled early or pre-teen Caucasian boy is abducted in the next day. Reid comes to the conclusion that the boys were housed in a homemade wooden box, which accounts for all their physical issues. Discovering a case similar from the past of boys so confined, especially as it relates to Halloween, may provide clues as to the identity of the unsub.

The BAU is stumped to find the common denominator among male victims in Montana, making it difficult to profile the UnSub. Meanwhile JJ deals with her feelings about a family crisis.

People in Maryland with large social media followings are murdered by an unsub who takes on the persona of an Internet urban legend. Meanwhile, Morgan and Savannah struggle to find quality time for each other due to their business careers.

A former Boston prosecutor turned successful defense attorney is abducted. As the team probes, past secrets of his life surface.

Rossi encounters an avid follower with an important secret, and a physically and psychologically damaged woman lets loose with personal murders.

The BAU is called to Salt Lake City, Utah to investigate a suspicious triple-homicide. Throughout the course of their investigation, they eventually discover that a fugitive killer could possibly be linked to the UnSub and he could also be a familiar face.

The team head out to Nevada after several frozen bodies are found floating in water somewhere. Whilst the BAU investigate it is revealed the victims were apart of a religious cult which they believe could be responsible for the deaths. Meanwhile, JJ is forced to confront some difficult emotions and demons on the one year anniversary of her abduction, and leans on Reid to help her get through.

The BAU searches Tallahassee for a serial killer who calls the authorities to report the crimes prior to committing them. Also, as Rossi prepares for a weekend visit with his daughter, Joy, he receives startling news about the death of a comrade from the Vietnam War.

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

The BAU heads to Indianapolis, Indiana where a bomb has just exploded at a popular chain coffee house, killing several. The police believe this bomb, crudely made using TNT, is related to a bombing one week earlier at a school, also using TNT. That bomb, because it was detonated at night, killed only one, the night time custodian, who was not supposed to be in the school at the time. Based on the exact location of the coffee shop bomb, Rossi and Morgan are uncertain if the bomb was meant to be as deadly as it was or not. In relative terms, there were also some good news stories associated, where a pregnant woman was saved, she who delivered a healthy baby. A third bomb attempt coupled with other information leads to the team figuring out who the bomber is. However, that third bomb, plus the school bomb, provide the biggest clues as to the nature of the entire picture. They hope that planting a little public misinformation may help them catch the unsub.

Peter Folkmore was an abused child and is an abuser as an adult. He captures women and abuses them for not reciting the exact instruction Peter gives them.

Two guards at a privatized maximum security prison in Texas are murdered. The investigation reveals the suspects may be in the prison.

The BAU hunt a serial killer in Wisconsin and try to find a connection between the victims so they can profile and identify the UnSub. Meanwhile, Kate experiences trouble dealing with her niece when she starts acting out.

When the wife of an increasingly prominent Congressman disappears, the BAU investigate and come to consider his adversaries and political enemies as potential suspects of the abduction, or possibly murder.

When an innocent family of four is abducted while vacationing in Barbados, Hotch and Cruz enlist the assistance of the FBI's most elite team in handling international cases. They realize that this situation closely resembles a case that the BAU once handled in Florida. Upon this discovery, the BAU contacts Jack Garrett, (Gary Sinise) the unit chief of the team with whom they will be working. The BAU will need to pool together their skills with Garrett's elite team in hopes to save this family. This will serve as the backdoor-pilot episode for the new spin-off, Criminal Minds: Beyond Borders.

When a family from Maryland is found murdered at their dining room table, the team tracks down other family members and friends to uncover secrets and details from the past in hopes to find out what may have led to it, and to catch who is responsible. Also, Hotch must try to make peace with his father-in-law, Roy, (Ed Asner) after discovering he's been diagnosed with Alzheimer's, and it has become painfully noticeable.

The BAU searches for a suspect who controls minds; the hunt puts one team member in danger.

The team heads to Los Angeles, California where three people have been murdered in two separate incidents over three days, each victim shot thirteen times while sitting in a car or next to a car located in the same crime ridden neighborhood. The ballistics show the same .45 caliber gun was used in both instances. The first victim, Gary Fisher, was known to have frequented prostitutes and was found in area where he was probably meeting with one. Nate Cochran and Tasha Brooks, the second and third victims in the same car, were a john and a hooker. When a fourth and fifth victim are discovered together, they an elderly woman, Clara Miller, and who seems to be a mugger, Lamar Taylor, the team believes the unsub is a vigilante - a moral enforcer - who is looking to clean up the streets of what he sees as immoral behavior. Because of the overkill, they know the reasons for the murders are personal. Information they learn about Clara and Lamar, and the discovery of subsequent victims leads to the team believing the unsub is devolving into believing everyone is a criminal. As such, they have to put together the pieces quickly to find him before more innocent people are indiscriminately killed.

When Kate's niece and her best friend Markayla are kidnapped, the BAU suspects an online predator engaged in sex trafficking who poses as a teenage boy.

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.

Rossi's daughter, a journalist, investigates the disappearance of a college student. JJ comes back from maternity leave.

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 BAU goes to St. Louis when an 18-year old woman escapes from a house where she and 2 other women were held for a decade.

The BAU heads to the Los Angeles, California area, where two women, in separate incidents, were found murdered within a day of each other, each found in their own home with no sign of forced entry, both single, and both having died of asphyxiation from being wrapped pre-mortem by a regular household item like a blanket or rug. By the time the team arrives at the Los Angeles FBI field office where they are basing their investigation, a third dead body with the same victimology is discovered. From surveillance footage at the third victim's apartment complex, the team believes the unsub is either masquerading as an FBI agent or truly is one. When the team determines that he is only masquerading as one, but that he needs to gain the confidence of his victims by real world events, they decide to set a trap for him that is potentially dangerous for the public. But in doing so, they, in the process, learn of an unfortunate real life tie to the agency. Through it all, Morgan can't help but worry about a text he received from Savannah before the team left for Los Angeles in her need for them "to have a talk".

The BAU works against time to find Morgan after he is kidnapped. Danny Glover guest stars.

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.