After a mass murder at an Internet security company, evidence indicates that the person responsible is not a typical serial killer Prentiss is required to complete recertification training.
The BAU team investigates a series of murders in Oklahoma Reid gives JJ and Prentiss the cold shoulder.
A Senate committee questions the members of the BAU team a familiar face may help keep the team united.
The team must investigate targeted killings in Florida while each member is dealing with feelings about losing Prentiss.
The team must stop a gang of suspected murderers that is targeting a new victim nightly.
Prentiss prepares to confront her nemesis at last the team asks J.J. to help find Prentiss and capture Doyle.
After a series of murders, Prentiss becomes suspicious of a former nemesis (Sebastian Roché) and fears for the safety of her team.
Reid's ability to connect with an autistic child may prove helpful in finding the boy's missing parents two former colleagues help Prentiss search for an old adversary.
The BAU heads to upstate New York to investigate mysterious disappearances Prentiss receives troubling news about a former colleague.
The team investigates unusual murders in Los Angeles, and more information about Prentiss' past arises.
Toby and Michelle search for a killer suspected of taking national defense secrets.
When Tia's colleague is targeted by a hotel owner, Toby pushes for an investigation.
Toby and Michelle search for a dangerous gang while feeling the pressure of the new police superintendent.
Toby and Michelle investigate a string of high-tech thefts in Vancouver.
After a woman's car is run off the road, only her baby survives Booth and Brennan go to the woman's hometown to investigate.
Brennan and Booth investigate the college-basketball world to determine who is responsible for the murder of a player on a nationally ranked team.
When the remains of a professional motorcycle racer are found in a hot spring, the team suspects his rival to be the murderer Dr. Lance Sweets forces Booth and Brennan to accompany him on a double date.
When the founder of an organic supermarket chain is found dead, Brennan and Booth suspect foul play by a rival farmer the two agents visit a new psychiatrist, who warns that the FBI may separate them.
The team investigates a footless corpse that was found in the woods Brennan and Booth's questioning leads to several suspects, including the victim's wife Angela agrees to undergo hypnosis to remember her former husband's name.
Brennan and Booth investigate when a soccer mom is blown up in her minivan the investigation uncovers that the woman was a member of the National Liberation Army.