The team heads to Oregon as four men have gone missing.

The FBI's assistant director of national security, Linda Barnes, joins the BAU as they investigate a quadruple homicide of a group of roommates in St. Louis.

Away from the watchful eye of the FBI's assistant director of national security, Linda Barnes, the BAU meets in secret to investigate an UnSub who appears to be kidnapping and photographing young women.

The BAU travels to Chicago to investigate an unsub who leaves red roses on each victim. Also, Rossi gets an unexpected visit from his ex-wife, Krystall Richards.

A professor from Lewis’ past tips off the BAU to an alarming number of overdose deaths of patients who just completed rehab.

The BAU team heads to Portland, Ore., to investigate a chilling abduction that may be linked to a local couple killed in their home a week earlier.

Prentiss and the team fly to Iowa to investigate the disappearance of three 10-year-old children who appear to have been abducted from their homes in the middle of the night, with surveillance video from a neighborhood park as their only lead to finding the children’s whereabouts.

Wedding bells are ringing as Rossi prepares to marry Krystall. But first, the BAU team travels to Los Angeles to investigate a series of fatal shootings in broad daylight following car accidents.