"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."

"When several women are found murdered in a similar fashion, Rossi revisits a case that has haunted him for 25 years."

"The BAU team searches for a serial killer who is preying on married couples. Also, Hotchner looks to one of the team to fill JJ's vacant role."

"The BAU team is on the trail of a serial killer targeting families throughout the Midwest. Meanwhile, Morgan is concerned when Ellie runs away from her foster family and pays him a visit."

"The BAU go to Detroit to catch a man who burns his victims alive during the pre-Halloween celebration Devil's Night."

"When bodies begin turning up in the cornfields of Indiana, the team must catch a pack of serial killers targeting exotic dancers."

"The team hunts a serial killer after a kidnapped woman is found murdered in an alley with her lips cut off."

"When a boy 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 team searches a gated community for a killer who has strangled several women."

"Morgan regrets his decision that a prisoner is ready for parole when the man murders someone days after being released."

"While the BAU are in Miami investigating a series of bizarre ritualistic murders, Reid suffers from intense migraines which makes him concerned about his health."

"While the BAU chases a pair of young lovers on an interstate killing spree, Prentiss is contacted by an old friend with some bad news."

"The BAU travels to Los Angeles to investigate unusual murders throughout the city. Also, more of Prentiss' mysterious past comes to light."

"The team travels to upstate New York to investigate a series of mysterious disappearances."

"The BAU are called to Louisiana to get information from an autistic boy who has witnessed his parents' abduction. Meanwhile, Prentiss calls in two old colleagues to track down Ian Doyle."

"When a series of killings occur on the BAU's home turf, Prentiss realizes that Ian Doyle is responsible."

"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 BAU travels to Portland to investigate a suspected gang of murderers targeting a new victim each night."

"As the BAU investigates targeted killings in Tampa, they also deal with their own feelings about the loss of Prentiss."

"The BAU hunts a stalker in San Diego who is targeting college students. Meanwhile, the team comes under Strauss' scrutiny in the wake of the loss of Prentiss."

"The BAU is called to a North Carolina mountain town after a woman is found badly injured and another is missing, and they discover that these two are not the only victims."

"The discovery of bodies buried in the ocean floor off Jacksonville prompts the BAU to intervene; Morgan's aunt suspects her missing daughter may be among the dead."

"Hotch calls an early morning meeting, the first he's called since Gideon left, which raises the curiosity of the team. He tells them that because of budget issues, there is going to be some restructuring at the FBI, and although he would like them all to stay with the BAU, they may be approached by other units. The meeting affects Garcia and Rossi the most, and Rossi ends up having a subsequent late-night meeting in his office because of it. Meanwhile, the team is called to assist in the investigation of a local car accident in which an unidentified male driver ..."