When an SUV carrying members of the BAU explodes, the rest of the team fights to save their colleagues and catch the terrorists responsible for the bombing.
When a series of murders are linked to a serial killer who was executed a year ago, the BAU must find the connection between him and the current killing spree.
When Prentiss and Reid go undercover to investigate possible child abuse at an underground cult, they get trapped inside the compound when a federal raid goes bad.
Serial killer who disguises his victims' demise by creating car accidents to mask their earlier deaths is the subject of a BAU manhunt.
Serial killer who jumps trains and targets people living near the railway is the subject of a BAU manhunt.
While investigating the kidnapping of a young boy in Las Vegas, Dr. Reid begins to have dreams that may help reveal some buried memories from his childhood.
Dr. Reid embarks on his own investigation into the murder of a young boy years earlier in Las Vegas that he strongly believes has a connection to his own childhood.
The team must profile a self-confessed serial killer who turns himself in, but sends them on a massive manhunt to find his latest victims before it is too late.
Agents Prentiss and Todd go undercover to profile a pickup artist who uses his skills of persuasion to lure women into danger.
Case hits close to home for Morgan, who was a cop before joining the team, when a serial killer specifically focuses on members of the police force in Phoenix, Ariz..
The team investigates a serial killer dubbed "The Road Warrior," a suspect who kills luxury car owners while they are driving on freeways in Southern California.
The BAU team suspects a member of an affluent community in Atlanta is responsible for the disappearance of a local young woman and that the suspect may have worked with an accomplice.
The BAU team becomes involved in the case of a family working together to abduct young women.
The team searches for a killer who embalms his victims in order to spend more time with them.
The team pursues a copycat murderer who is duplicating the methods of infamous serial killers.
The team searches for a prostitute who is luring and murdering business executives.
A string of deaths with religious undercurrents is investigated, and Prentiss has a personal tie to the case.
Agent Hotchner revisits the first case he worked at the BAU when details come forth that one of the deadliest serial killers in New England's history has struck again after a 10-year hiatus.
The BAU team must track down a serial arsonist who instills fear in a small town by setting fire to community meeting places and killing several residents in the process.
The team travels to South Padre Island during spring break to find a serial killer who is targeting college students on vacation.
When profiling a series of child abductions and murders, the team discovers that one of the cases may not be the handiwork of the serial killer they apprehended.
When the team is sent a videotape from a serial killer detailing one of his crimes, they discover a hidden message asking them to help him stop his murderous ways.
An unsub who kills with his car is the subject of a BAU investigation.
When a new type of chemical warfare is released into the open air, the BAU must act quickly to find the source before any more innocent people are exposed.
The team hunts for a serial killer in Detroit who targets those on the fringe of society.
In the fourth-season finale, the team searches for the killer in Canada, and an agent's life is threatened.