Elle, along with many others, is held hostage on a train in Texas by a paranoid schizophrenic who is convinced that the U.S. government is monitoring him. Hotchner and Gideon are forced to play into the man's fantasy to save the people he has taken hostage.

The BAU works to capture a serial killer who has evaded capture by altering his appearance.

The BAU has reason to believe a series of murders might have been committed by two people working as a team after the victims' families receive DVDs after each crime that includes psychological attacks.

The BAU is called to investigate after the bodies of missing people are discovered in a remote region of the Idaho wilderness. The gruesome find also leads the team to determine the unsubs have been hunting humans for sport.

The BAU travels to Portland to assist local authorities in investigating the disappearances of people who are new to the city and have no strong social ties.

As a team member fights for life, the BAU continues the search for an attacker that leads the unit to believe the assailant could be someone close to the investigation.

The BAU is called to Pittsburgh after an unusually high suicide rate appears to be the work of an Angel of Death.

Reid and Prentiss are taken hostage when they go under cover to investigate possible child abuse at an underground cult.

The BAU team must track down a serial arsonist who instills fear in a small town by setting fire to community meeting places and killing several residents in the process.

A group of suspects with a pack mentality who kill for the thrill of it are the subjects of a BAU manhunt.

The BAU is called upon to profile the past of an ex-convict and help stop him after he escapes from custody and embarks on a violent killing spree.

The BAU team investigates a mass murder at an Internet security company in Charlottesville, Va., but clues reveal it is not a typical serial killer at work.

Rossi and the team teach college students the science of criminal profiling by taking the class through a serial-killer case that spanned 20 years.

The BAU goes to Morgan's old neighborhood in urban Chicago in search of an unsub targeting middle-aged men, and a clue leads Morgan to believe that they are after someone connected to the man who molested him as a child.

The BAU travels to Pittsburgh on the hunt for a pair of suspects that appear to be working together as a team; Garcia and Morgan reveal their Valentine's Day plans for their respective significant others to each other.

When the wife of an up-and-coming congressman disappears, the BAU investigates his political enemies as possible suspects.

When a woman is murdered in a small town in Florida inhabited entirely by sex offenders, the BAU faces a community full of suspects. Also, Lewis receives a career opportunity that may take her away from the BAU.

When guards at a Virginia prison intercept a package with evidence relating to the kidnapping of two boys several years ago, the BAU questions a notorious serial killer who may have information on the boys’ whereabouts.