Alexandra Krosney

The BAU is called to West Bune, a small town in Texas, to investigate what appears to be spree killings that involve a teenaged boy and his girlfriend.

Booth’s boss, FBI Deputy Director Sam Cullen, is anxiously awaiting information from doctors as to why his daughter Amy is dying of a rare form of lung cancer. When Brennan learns of Amy's condition, she questions the rarity of the cancer in a girl of Amy's age and background and discovers Amy had a bone graft as a result of a previous accident. Brennan enlists Booth's help to dig deeper into the origin of the bone graft she received, and they are shocked to learn Amy is not the only person with the rare terminal cancer and that she may be the victim of a crime.

Gibbs and the team are called in when a teenage student at a Quantico base high school attaches a bomb to his body and holds his fellow students hostage.

A time shift forces Farraday, Charlotte, Sawyer, Locke and Juliet to encounter The Others in the 1950s; as he attempts to carry out Farraday's directions, Desmond is forced to face Charles Widmore.

Don and his team search for the fundamentalist leader of a polygamous sect who is on the FBI's most wanted list for committing numerous crimes, including rape and murder. When a teenage girl is found almost beaten to death, Don and his team discover that she escaped from a polygamous cult headed by a fundamentalist leader who is on the run from the FBI. They discover that the girl's mother, who is also a religious zealot, "gave" her daughter to the leader. Meanwhile, Charlie and Amita try to decipher a chart that was found at the leader's last known location, hoping it will lead them to him.