The BAU profiles a serial killer who takes families hostage and lives with them as a father figure during what is supposed to be their family vacations.

After interviewing a couple on death row for serial murders, Gideon suspects that the woman is actually innocent. But since she's set to be executed in two days, it's a race against time to prove it.

The BAU works with the CIA to identify a mole within that organization, whose leaks are putting operatives at risk.

A young boy who had disappeared a year ago turns up for sale by a child pornographer on an online auction in Cleveland. A former profiler who now heads the FBI's Crimes Against Children Unit asks Hotch and the BAU to help her save the boy's life before it's too late.

Gideon is pitted against the scariest and most evil murderer in his entire career. When the BAU confronts the sadistic killer in a remote diner in the Nevada desert, the local authorities want to move quickly and make an arrest. But Gideon bides his time as he attempts to persuade the man, who has sworn not be captured, to reveal the whereabouts of a woman he is holding hostage.

When the prolific serial killer Frank returns and murders Gideon's girlfriend, Gideon takes off to find him without telling the team where he is going. The BAU must then profile Gideon as well as Frank to find both of them.

When one teenager is found murdered and her best friend is abducted in Chula Vista, California, the BAU assists local authorities in determining whether the Witness Protection Program is involved.

When an SUV carrying members of the team explodes, the rest of the team fights to save them and catch the terrorists responsible for the bombing.

When the team is sent a videotape from a serial killer detailing one of his crimes, they discover a hidden message asking them to help him stop his murderous ways.

The BAU team is tracking down a family annihilator, but needs to take a break from the case to get advice from "The Fox", who is an horrific killer from the team's past. "The Fox" surprises the team with a ominous message for Agent Hotchner.

The BAU team races to help Hotchner find The Reaper and save his family before it's too late.

The BAU is called by local authorities in Ashburn, Virginia, to profile a predator who may have been abducting children for at least eight years.

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.

After a series of murders, Prentiss becomes suspicious of a former nemesis, and fears for the safety of her team.