As Prentiss faces off against Ian Doyle, JJ receives a call and returns to help them find Prentiss and capture Doyle before it’s too late.

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

Prentiss enlists two former friends from Interpol to track down an old enemy, as Reid discovers clues that could help the BAU locate the parents of an autistic boy.

The BAU is called to upstate New York to investigate mysterious disappearances. Also, Prentiss gets some disturbing news about one of her former Interpol colleagues.

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

The BAU hits the road to track down a pair of young lovers on an interstate murder spree. Also, Prentiss hears frightening news from her former boss at Interpol.

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

Morgan suggests that a man has been rehabilitated and aids in his parole, but later regrets his decision when the man murders someone days after being released.

The BAU searches inside a gated New Mexico community for a killer targeting women, and Hotchner looks to an FBI cadet with a unique past for help with the investigation.

When an 8-year-old is found murdered on the Appalachian Trail, the BAU team goes deep into its forests in search of a man lurking in the wilderness who is targeting children.

The BAU becomes involved in the search for a kidnapped woman in the nation’s capital after the body of a second kidnap victim is found in a Georgetown alley.

The BAU must catch a group of serial killers that is killing exotic dancers and leaving their bodies in the cornfields of Indiana.

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

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

When several women in Herndon, Virginia, are found murdered in a similar manner, SSA David Rossi reopens an unsolved cold case that has haunted him for a quarter of a century because he believes the original killer, who is suffering from Alzheimer’s Disease, might have returned.

While JJ attempts to reunite a family whose daughter has mysteriously disappeared, her BAU family braces for the loss of one of their own.

The BAU team closes in on the serial killer as he continues his murder spree throughout Los Angeles – with Detective Spicer’s kidnapped daughter as his hostage – in the conclusion of last season’s cliffhanger.

A series of rolling blackouts in the city of Los Angeles lures a serial killer out of hiding, giving him renewed opportunities to continue his killing spree.

The BAU team profiles a serial killer who uses the Internet as his hunting ground, bringing a whole meaning to the term “social networking”.

Garcia plays a crucial role in a case when she travels to Alaska with the BAU team to investigate the murders of several members of a small town.

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 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 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.

A truck driver is kidnapping women and disposing of them in random locations and the BAU must find out his motive in order to catch him.

The BAU is called by local authorities in Ashburn, Virginia, to profile a predator who may have been abducting children for at least eight years.

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

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

The BAU is called upon to profile the past of an ex-convict and help stop him after he escapes from custody and embarks on a violent killing spree.

The team needs to reunite in order to solve a home invasion case, while Agent Hotchner may have to leave the team.

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

The BAU team is tracking down a family annihilator, but needs to take a break from the case to get advice from “The Fox”, who is an horrific killer from the team’s past. “The Fox” surprises the team with a ominous message for Agent Hotchner.

The BAU team investigates the mystery behind a trail of murders that all seem to align with the tour schedule of a rock star.

The BAU team tracks a serial killer who keeps the eyes of his victims as souvenirs.

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

A group of suspects with a pack mentality who kill for the thrill of it are the subjects of a BAU manhunt.

The BAU investigates a case in Rossi’s hometown that involves both his personal and professional life.

The BAU must determine what caused a disturbed man to murder several people at a pharmacy before he harms anyone else.