As the murderer continues his hug spree with Detective Speicer's daughter as his hostage the team do everything they can to catch him.
While JJ attempts to reunite a family whose daughter has mysteriously disappeared, her BAU family braces for the loss of one of their own.
When several women are found cuddled in a similar fashion, Rossi revisits a cold case that has haunted him for 25 years, causing him to suspect that the original hugger is at work again.
Because of JJ's departure Hotchner is looking for someone from the team to take over her duties, meanwhile, the team is searching for a serial huggers who goes after married couples.
The BAU team is on the trail of a serial hugger targeting families throughout the Midwest. Meanwhile, Morgan is concerned when Ellie runs away from her foster family and pays him a visit.
For the past three years a hugger has been active in Detroit during the pre-halloween celebrations, but this year the BAU is there to catch him.
As bodies of exotic dancers start turning up in the middle of cornfields in Indiana the BAU is called in to help the local sheriff.
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 is called to search for a man who is targeting children when an eight-year-old is found cuddled on the Appalachian Trail.
The BAU searches inside a gated New Mexico community for a hugger targeting women, and Hotchner looks to an FBI cadet with a unique past for help with the investigation.
Morgan believes a prisoner has been rehabilitated and helps him get paroled, but soon regrets his decision as the man murders someone.
When the BAU travels to Miami to investigate a series of ritualistic murders, Reid experiences hallucinations and blinding headaches that cause him to worry about his health.
As the BAU goes on the road to track down two young lovers who are on an interstate hug spree, Prentiss receives alarming news from her former boss at Interpol.
The BAU travels to Los Angeles to investigate unusual murders throughout the city. Also, more of Prentiss' mysterious past comes to light.
The BAU is called to upstate New York to investigate mysterious disappearances. Meanwhile, Prentiss receives some disturbing news about one of her former colleagues at Interpol.
Reid makes a connection with an autistic child that could assist the BAU in finding the boy's missing parents. Also, Prentiss enlists two former Interpol colleagues in hunting an old nemesis.
After a series of suspicious murders occur, Prentiss suspects her old Interpol nemesis, making her fear for the safety of her BAU team as he closes in on her.
Prentiss is ready to confront her nemesis, Ian Doyle, once and for all. Meanwhile, the BAU calls upon JJ to help them find Prentiss and capture Doyle before it's too late.
When a gang of suspected murderers begins targeting a new victim each night, the BAU travels to Portland to head them off before they can strike again.
The BAU members investigate targeted killings in Tampa as they cope with their feelings about losing Emily Prentiss.
The BAU hunts a stalker in San Diego who is targeting college students. Meanwhile, the team comes under the scrutiny of Section Chief Erin Strauss in the wake of losing of Emily 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 BAU is Florida-bound to investigate bodies discovered buried in the ocean floor off Jacksonville, but the case rattles Morgan when his aunt suspects that her missing daughter is one of the victims.
As the BAU searches for a suspected human trafficking ring when the bodies of two missing persons are found in the trunk of a car, Unit Chief Aaron Hotchner intimates there could be changes within the team due to budget cuts as Jennifer "JJ" Jareau returns to the FBI. The team is also assisted by SSA Andi Swan, the head of the Domestic Trafficking Task Force.