Episode 1 | The Longest Night

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

Episode 2 | JJ

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.

Episode 3 | Remembrance of Things Past

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

Episode 4 | Compromising Positions

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.

Episode 5 | Safe Haven

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.

Episode 6 | Devil's Night

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

Episode 7 | Middle Man

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

Episode 8 | Reflection of Desire

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

Episode 9 | Into the Woods

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.

Episode 10 | What Happens at Home...

The team searches a gated community for a killer who has strangled several women.

Episode 11 | 25 to Life

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

Episode 12 | Corazon

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.

Episode 13 | The Thirteenth Step

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.

Episode 14 | Sense Memory

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

Episode 15 | Today I Do

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

Episode 16 | Coda

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.

Episode 17 | Valhalla

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

Episode 18 | Lauren

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

Episode 19 | With Friends Like These

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

Episode 20 | Hanley Waters

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

Episode 21 | The Stranger

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.

Episode 22 | Out of the Light

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.

Episode 23 | Big Sea

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.

Episode 24 | Supply and Demand

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