Season 4 - Episode Guide

A new profiler is called in to help locate Sam, who was abducted by Jack, the bogus sheriff.

More killings occur that resemble Jack's original murders and the relationship between Sam and Chloe is examined.

In her first case as the new profiler, Rachel Burke is on the trail of a serial killer whose victims are left deliberately posed.

Bailey revisits a 15-year-old serial-murder case, from which the bodies have just been found. Soon after he and Rachel arrive in town, another murder occurs and an abduction takes place.

Rachel and the team investigate a series of killings wherein each of the victims had recently been involved in an extra-marital liason.

Rachel and her colleagues travel to St. Louis to try to solve three killings that have occurred in as many weeks.

Rachel attempts to solve the murders of a number of brunette women in their early 30s.

After an eighth victim is claimed by a killer who travels in boxcars, Rachel and the team go to Arizona, the scene of the latest murder.

Rachel forms a bond with a mob boss, whose only daughter has become the latest victim of a serial killer.

Jarod returns to help Rachel and Bailey solve two new murders.

During a convenience-store robbery, John's girlfriend is badly wounded and he shoots one of the crooks.

While speaking on a campus radio at her alma mater, Rachel receives a telephone call from a rapist, whom she then tries to track down.

While the team searches for a killer, Rachel is faced with a charge of moral turpitude for a past incident involving Grant.

The murders of a woman and her two daughters in a national park lead Rachel and her colleagues to the path of their killer.

While Rachel is on the trail of a serial kidnapper she once prosecuted, she's also concerned about her brother, who's run away from rehab.

After a sniper opens fire at a public park and kills several people, Rachel tries to find a pattern to the shootings.

The team investigates the abduction of a 12-year-old from a diner and links it to three recent murders; at the same time, someone ransacks Rachel's home.

As the team tries to determine the facts regarding a pianist's death, "The Pretender" returns to help Rachel, who's being harassed by a missing FBI agent.

While Rachel and the team investigate the murders of two men who seem to have no backgrounds, Marks persists in his plot for revenge.

As Rachel continues to be spooked by Marks, she and the team investigate a series of murders of businessmen.