One of a lawyer's identical twin daughters is kidnapped. The kidnapper contacts him and demands ransom money. The team's investigation, however, reveals that he doesn't really want the money, but both girls.
The disappearance of an undercover officer in relation to a triple murder puts the BAU on the hunt of a possible serial killer who's turned it into a profession.
The apparent death by Satanic ritual brings the BAU to a small town, and the profiling morphs into a search when it's learned that a teenage girl is missing.
The team travels to Manhattan to work with the NYPD in tracking and apprehending a serial killer who is intent on dispensing his own style of vigilante justice.
The BAU is requested to assist on a case in Mexico to determine if there is a serial killer in the town of a police captain who attended one of Gideon's seminars.
The BAU team investigates a CIA counter-terrorism unit to identify a traitor who had a fellow agent murdered and who is trying to find and kill the unit's informant, a Saudi woman with two children who are in hiding.
